JP4146851B2 - Electrical equipment testing aids - Google Patents

Description

  The present invention relates to an apparatus for assisting a test of an electrical equipment to be tested including a relay element.

  Generally, an electrical installation having a relay element (hereinafter referred to as “element”), for example, a protective relay, often has a plurality of elements. Depending on the type of element, the observation points for capturing current and voltage differ. Further, depending on the type, there are cases where one element has a plurality of observation points. For example, in the case of a three-phase AC overcurrent relay, observation points are often provided in three of each phase.

  In order to test the characteristics of elements, it is necessary to connect the tester and the like to the protective relay with test wiring. The location of the protective relay terminal to which the test wiring is connected is determined by the observation point. Therefore, in order to perform a characteristic test of an element, it is necessary to connect a test wiring to an observation point corresponding to the element. In addition, when the types of elements are different, the connection configuration of the test wiring is often different from the equipment used for the test.

  Therefore, when one element has a plurality of observation points, the test wiring is reconnected every time the test of one observation point is completed. When the test for one element is completed, it is necessary to replace the test wiring and the tester, the measuring instrument, etc. in order to prepare the test for the next element. All these operations were done manually.

As an invention for performing a characteristic test of an element, an overcurrent protection relay improved so that setting can be performed easily and reliably is disclosed (see, for example, Patent Document 1). Furthermore, a protective relay test apparatus is disclosed in which it is not necessary to change the operation settings of the protective relay and the test time can be shortened (see, for example, Patent Document 2).
JP 2000-261951 A JP-A-8-152450

  The inventions disclosed in Patent Documents 1 and 2 are improved on the protection relay side to be tested or manufactured for a very limited number of elements. It has been difficult to apply to test multiple mounted elements.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an electrical equipment test auxiliary device capable of easily switching the wiring connection configuration in testing electrical equipment having a plurality of elements.

  The invention for achieving the above object is an apparatus used when testing an electrical facility to be tested using current simulation means for simulating AC current in a power system and voltage simulation means for simulating AC voltage in the power system. The electrical equipment includes three-phase alternating current input means for inputting a three-phase alternating current, single-phase alternating current input means for inputting a single-phase alternating current, and a single-phase alternating current voltage. Phase AC voltage input means, a first relay element that operates according to the phase current of the three-phase AC current input means, and a second relay element that operates according to the line current of the three-phase AC current input means And a third relay element that operates according to the current of the single-phase AC current input means and the voltage of the single-phase AC voltage input means, and outputs the current input from the current simulation means to an external device. The current obtained from the external device A current selection means for selecting one of a first option for output and a second option for outputting a current input from the current simulation means; and a current input from the current selection means for the three-phase Select one of the first option for output to flow to the alternating current input means and the second option for output to flow to the single-phase alternating current input means, and select the second option In this case, the interlock selection means for outputting the voltage input from the voltage simulation means to be applied to the single-phase voltage input means, and the current input from the current selection means is either one of a phase current or a line current. Output mode selection means for selecting one output mode, and when the phase current is selected in the output mode selection means, the current input from the output mode selection means is one of the three phases of the three-phase alternating current input means. A phase selection means for outputting a line current by arbitrarily selecting two of the three phases of the three-phase alternating current input means, It is a test auxiliary device of the electric equipment provided with.

  According to the present invention, it is possible to provide an apparatus capable of reducing manual work for performing a test in a wide variety of electric facilities including a relay element and shortening a test time.

  Embodiments of the present invention will be described below with reference to the drawings.

(First embodiment)
First, a description will be given of the protective relay 2 that is a test object of a test auxiliary device for electric equipment (hereinafter referred to as “test auxiliary device”) according to the present invention.

(Configuration of power system protected by protective relay)
FIG. 13 is a configuration diagram showing the configuration of the power system protected by the protective relay 2. With the boundary line BD as a boundary, the left side represents a single line connection diagram, and the right side represents a double line corresponding to a single line.

  The power system is configured to supply power received by the network transformer TR to the lower system NB via the circuit breaker CB. The subordinate system NB is, for example, a network bus. This power system is a network-type power system that forms three-phase alternating current in the R phase, S phase, and T phase, and is exchanged by three-phase four-wire AC power that includes these three-phase neutral points and N phases. It is carried out.

  The current transformer CT1 is interposed between the network transformer TR and the circuit breaker CB, and is installed on the network transformer TR side. The current transformer CT1 outputs to the protective relay 2 the current I1 that is reduced according to the ratio (CT ratio) of the current flowing through the installed location. The current I1 is a three-phase four-wire AC current composed of an R phase I1R, an S phase I1S, a T phase I1T, and an N phase I1N.

  The instrument transformer VT1 is interposed between the network transformer TR and the circuit breaker CB, and is installed on the circuit breaker CB side. The instrument transformer VT1 outputs a voltage V1 obtained by stepping down the voltage applied to the installed location according to a ratio (PT ratio) to the protective relay 2. Voltage V1 is a three-phase AC voltage composed of R phase V1R, S phase V1S, and V1T.

  The current transformer CT2 is interposed between the network transformer TR and the circuit breaker CB, and is installed on the circuit breaker CB side. The current transformer CT2 outputs the current flowing through the installed location to the protective relay 2 as a current I2 that is reduced according to the ratio (CT ratio). The current I2 is a three-phase four-wire AC current composed of an R phase I2R, an S phase I2S, a T phase I2T, and an N phase I2N.

  The instrument transformer VT2 is installed on the network bus NB side of the circuit breaker CB. The voltage transformer VT2 steps down the voltage applied between the R-phase and S-phase lines among the voltages applied to the installed location according to the ratio (PT ratio), and only the potential on the R-phase side is obtained. The voltage ΔVR is output to the protective relay 2. Further, a line to which a potential on the S-phase side (not shown) is applied is connected to the S-phase V1S of the voltage V1.

  The zero-phase current transformer ZCT is installed on the network bus NB side of the circuit breaker CB. The zero-phase current transformer ZCT reduces the current flowing through the installed location according to the ratio (ZCT ratio), forms the zero-phase current I0, and outputs it to the protective relay 2. The zero-phase current I0 is a single-phase alternating current composed of I0k and I01.

  The instrument transformer VT3 is installed on the network bus NB side of the circuit breaker CB. The instrument transformer VT3 steps down the voltage applied to the installed location in accordance with the ratio (PT ratio), forms a zero-phase voltage V0, and outputs it to the protective relay 2. The zero-phase voltage V0 is a single-phase AC voltage composed of V0u and V0v.

(Configuration of the protective relay according to the first embodiment)
FIG. 14 is a block configuration diagram for explaining the configuration of the protective relay 2 according to the embodiment of the present invention.

  The protective relay 2 includes input units 21 to 26 that input voltages and currents, an information processing unit 20 that performs processing for each element to use the voltages and currents input from the input units 21 to 26, and information processing And elements R1 to R10 that operate based on the information processed by the unit 20.

  The information processing unit 20 is, for example, an A / D converter that converts analog data such as captured current and voltage into digital for the CPU to calculate, or high frequencies such as noise, commercial frequency, low frequency, and harmonics. It is composed of a CPU or the like that performs arithmetic processing such as removal or extraction. In these, various filters may be mounted instead of the arithmetic processing of the CPU.

  The input unit 21 is a place where an electric wire or the like for taking in the current I1 input from the power system is connected. The input unit 21 includes a terminal 211, a terminal 212, a terminal 213, and a terminal 214, and individually connects the R phase, S phase, T phase, and N phase of the current I1.

  The input unit 22 is a place where an electric wire or the like for taking in the current I2 input from the power system is connected. The input unit 22 includes a terminal 221, a terminal 222, a terminal 223, and a terminal 224, and individually connects the R phase, S phase, T phase, and N phase of the current I2.

  The input unit 23 is a place where an electric wire or the like for taking in the voltage V1 input from the power system is connected. The input unit 23 includes a terminal 231, a terminal 232, a terminal 233, and a terminal 234, and individually connects the R phase, the S phase, and the T phase of the voltage V1.

The input unit 24 is a place where an electric wire or the like for taking in the voltage V1 input from the power system is connected. The input unit 24 has a terminal 24 1, has an R-phase voltage V1 to connect.

  The input unit 25 is a place where an electric wire or the like for taking in the zero-phase current I0 input from the power system is connected. The input unit 25 has a terminal 251 and a terminal 252, and is connected individually to I0k and I01 of the zero-phase current I0.

  The input unit 26 is a place where an electric wire or the like for taking in the zero-phase voltage V0 input from the power system is connected. The input unit 26 includes a terminal 261 and a terminal 262, and individually connects V0u and V0v of the zero-phase voltage V0.

(Elements according to the first embodiment)
Each element detects an accident or abnormality in the power system and outputs a signal 3. Based on these signals 3, the protective relay 2 performs opening and closing of the circuit breaker, an alarm to the outside, and the like.

  For example, an overcurrent relay (hereinafter referred to as “51”) is used to protect devices and cables from overcurrent. The ground fault direction relay (hereinafter referred to as “67G”) operates when a ground fault (grounding) accident occurs. The power direction relay (hereinafter referred to as “67”) is a relay that detects and prevents the electric power from flowing out (reverse flow) to the power supply side due to a power failure on the primary side of the distribution line or the receiving and distribution transformer. The phase comparison relay (hereinafter referred to as “78”) detects the phase state and checks the condition of circuit breaker input. The voltage relay (hereinafter referred to as “84”) operates by detecting a rated voltage or no voltage. The ratio differential relay (hereinafter referred to as “87”) detects a difference in current flowing through both ends of the network distribution line. In addition to these elements, an overcurrent relay (hereinafter referred to as “51S”) having an inverse time characteristic in which the operation time changes depending on the overcurrent current value, a relay that detects an overload current and outputs an alarm. (Hereinafter referred to as “57”).

  Next, with reference to FIGS. 15 to 24, description will be given of a method for inputting the electric quantity of the power system, which is a condition for operating an element when a characteristic test is performed for each element held by the protective relay 2. FIG.

  15 to 24, a line drawn by a solid line (for example, the N phase I1N of the current I1 in FIG. 15) indicates that it is always necessary to wire. Dotted lines (for example, the R phase I1R, the S phase I1S, and the T phase I1T of the current I1 in FIG. 15) indicate that one of these needs to be selected and wired. . The lines drawn by the alternate long and short dash lines (for example, the R phase I1R, the S phase I1S, and the T phase I1T of the current I1 in FIG. 16) indicate that two of these need to be selected and wired. Yes.

  FIG. 15 is a block diagram for explaining 51R1.

  51R1 operates according to the phase current of the current I1. Accordingly, the characteristic test of 51R1 is performed by selecting one phase from among the R phase I1R, S phase I1S, and T phase I1T of the current I1, and passing a current between the selected phase and the N phase I1N. By performing this for each phase of the current I1, a total of three measurements are performed. Actually, the number of times that is an integer multiple (the number of times the settling value has been changed) is often measured three times by changing the settling value that is the reference for the operation of 51R1, but here, for convenience of explanation, three times are measured. Measurement of Hereinafter, the same applies to the characteristic tests of all elements.

  FIG. 16 is a block diagram for explaining 51R2.

  51R2 operates according to the line current of the current I1. Therefore, the characteristic test of 51R2 is performed by selecting two phases from the R phase I1R, S phase I1S, and T phase I1T of the current I1 and passing a current between the two phases. By performing this between each line of the current I1, a total of three measurements are performed.

  FIG. 17 is a block diagram for explaining 51R6.

  51R6 operates according to the phase current of the current I2. Therefore, the characteristic test of 51R6 is performed by selecting one phase from among the R phase I2R, S phase I2S, and T phase I2T of the current I2 and passing a current between the selected phase and the N phase I2N. By performing this for each phase of current I2, a total of three measurements are performed.

  FIG. 18 is a block diagram for explaining 51R7.

  51R7 operates according to the line current of the current I2. Therefore, the characteristic test of 51R7 is performed by selecting two phases from the R phase I2R, S phase I2S, and T phase I2T of the current I2 and passing a current between the two phases. By performing this between each line of the current I2, a total of three measurements are performed.

  FIG. 19 is a block diagram for explaining 67GR3.

  67GR3 operates according to the zero-phase current I0 and the zero-phase voltage V0. Therefore, the 67GR3 characteristic test is performed by applying a voltage between the polarity potential u of the voltage V0 and the reference potential v, and passing a current between the k phase I0k and the l phase I01 of the current I0.

  FIG. 20 is a block diagram for explaining 67R4.

  67R4 operates according to the three-phase voltage V1 and the phase current I2. Accordingly, the characteristic test of 67R4 applies a three-phase voltage to the R phase V1R, S phase V1S, and T phase V1T of the voltage V1, and selects one of the R phase I2R, S phase I2S, and T phase I2T of the current I2. A phase is selected, and current is passed between the N phase I2N. By performing this for each phase of current I2, a total of three measurements are performed.

  FIG. 21 is a block diagram for explaining 78R5.

78R5 operates in accordance with the line voltages and the potential [Delta] V R between S phase and T-phase voltage V 1. Therefore, the characteristic test of 78R5 is performed by applying the S phase V 1 S, the T phase V 1T, and the potential ΔVR of the voltage V 1 .

  FIG. 22 is a block diagram for explaining 87R8.

  87R8 operates in accordance with the same-phase current flowing in current I1 and current I2. Therefore, in the 87R8 characteristic test, one phase is selected from the R phase I1R, S phase I1S, and T phase I1T of the current I1, and a current is passed between the selected phase and the N phase I1N. Then, a current I2 having the same phase as the phase selected by the current I1 is supplied. By performing this in each phase, a total of three measurements are performed.

  FIG. 23 is a block configuration diagram for explaining 51SR9.

  51SR9 operates according to the phase current of current I1. Therefore, the characteristic test of 51SR9 is performed by selecting one phase from the R phase I1R, S phase I1S, and T phase I1T of the current I1 and passing a current between the selected phase and the N phase I1N. By performing this for each phase of the current I1, a total of three measurements are performed. In addition, since this element has an inverse time characteristic, a current larger than the normal 51 is required to test this characteristic.

  FIG. 24 is a block diagram for explaining the 84R10.

  The 84R10 operates according to the three-phase voltage V1. Therefore, the 84R10 characteristic test is performed by applying a three-phase voltage to the R phase V1R, S phase V1S, and T phase V1T of the voltage V1.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Configuration of the first embodiment)
With reference to FIG. 1, the structure of the test assistance apparatus 1 which concerns on 1st Embodiment is demonstrated.

  The test auxiliary device 1 includes current selection means such as a block circuit BL1, first output form selection means such as a block circuit BL6, interlock selection means such as block circuit BL2, and second output form selection means such as block. The circuit BL3, the first phase selection unit and the second phase selection unit, for example, the block circuit BL4, and the voltage input selection unit, for example, the block circuit BL5 are configured as follows.

  The block circuit BL1 is connected so that a current is input from a tester or the like and the current is output to the block circuit BL6 and the block circuit BL2. The block circuit BL1 is connected to the connection points S11 and S12 at the connection points S61 and S62 of the block circuit BL6, respectively. The block circuit BL1 is connected to the connection points S13 and S14 at the connection points S21 and S22 of the block circuit BL2.

  The block circuit BL6 is connected to output the current input from the block BL1 to the block circuit BL4. The block circuit BL6 is connected to the connection points S63, S64, S65 and the connection points S41, S42, S43 of the block circuit BL4, respectively.

  The block circuit BL2 is connected to output the current input from the block circuit BL1 to the block circuit BL3. The block circuit BL2 is connected to the connection points S23 and S24 at the connection points S31 and S32 of the block circuit BL3, respectively. The block circuit BL2 is connected to a voltage input from a tester or the like, and one is connected to output to the block circuit BL5, and the other is output to the input sections 25 and 26 of the protective relay 2. Become. The block circuit BL2 is connected to the connection points S25, S26, S27 and the connection points S51, S52, S53 of the block circuit BL5, respectively.

  The block circuit BL3 is connected to output the current input from the block circuit BL2 to the block circuit BL4. The block circuit BL3 is connected to the connection points S33, S34, and S35 at connection points S44, S45, and S46 of the block circuit BL4, respectively.

  The block circuit BL4 outputs the currents input from the block circuit BL6 and the block circuit BL3 to the input units 21 and 22 of the protective relay 2.

  The block circuit BL5 outputs the voltage input from the block circuit BL2 to the input units 23 and 24 of the protective relay 2.

(Connection configuration with other devices according to the first embodiment)
Next, as a preparation for the characteristic test, connection between the test auxiliary device 1 and other devices will be described. For the connection of equipment and devices, test wiring such as electric wires is appropriately prepared and connected.

  The terminal is a part where a test wire or the like can be easily connected or disconnected. The terminals are screws or connectors that can be removed using a screwdriver or hand. Hereinafter, the same applies to all terminals.

  The current tester 3 outputs a single-phase alternating current Ia.

  The current tester 4 outputs a single-phase alternating current Ib.

  The voltage tester 7 outputs a single-phase AC voltage Va.

  The voltage tester 8 outputs a single-phase AC voltage Vb.

  In the block circuit BL1, the current tester 3 is connected to terminals T11 and T12, the current tester 4 is connected to terminals T13 and T14, and the zero-phase current transformer 5 is connected to terminals T17 and T18. An electric wire from which the secondary current of the zero-phase current transformer 5 is output is connected to the terminals T15 and T16 via the milliampere meter 6.

  In the block circuit BL2, the voltage tester 7 is connected to terminals T21 and T23, and the voltage tester 8 is connected to terminals T24 and T22, respectively.

  The block circuit BL4 connects the terminals 211, 212, 213, and 214 of the input part 21 of the protective relay 2 to the terminals T41, T42, T43, and T44, respectively, and the protective relay 2 to the terminals T45, T46, T47, and T48. The terminals 221, 222, 223, and 224 of the input unit 22 are connected to each other.

  Hereinafter, with reference to the drawings, each block circuit will be described in a state of being connected as described above.

(Block circuit BL1)
The configuration and operation method of the block circuit BL1 will be described with reference to FIG.

  The block circuit BL1 mainly includes a switch SW1. The switch SW1 has a selector SL1. The selector SL1 can arbitrarily and easily select the position P1, the position P2, and the position P3. The switch SW1 is, for example, a rotary type, and each position can be selected by turning manually.

  The block circuit BL1 determines in what form the currents output from the current tester 3 and the current tester 4 flow to other block circuits depending on the position selected by the selector SL1.

(Switch SW1)
Next, a circuit according to selection of the selector SL1 in the switch SW1 will be described.

  When the position P1 is selected, a terminal connected between a and b is seen among the terminals 101a to 110d.

  In FIG. 2, only the terminals 107a and 107b, the terminals 108a and 108b, the terminals 109a and 109b, and the terminals 110a and 110b are connected.

  Therefore, currents input to the terminal 107a, the terminal 108a, the terminal 109a, and the terminal 110a are output from the terminal 107d, the terminal 108d, the terminal 109d, and the terminal 110d, respectively, and the other terminals are electrically disconnected from each other. Become.

  When the position P2 is selected, the terminal connected between b and c is seen among the terminals 101a to 110d.

  In FIG. 2, only the terminals 101b and 101c, the terminals 102b and 102c, the terminals 103b and 103c, and the terminals 104b and 104c are connected.

  Accordingly, currents input to the terminals 101a, 102a, 103a, and 104a are output from the terminals 101d, 102d, 103d, and 104d, respectively, and the other terminals are electrically disconnected.

  When the position P3 is selected, a terminal connected between c and d is seen among the terminals 101a to 110d.

  In FIG. 2, only the terminals 101c and 101d, the terminals 102c and 102d, the terminals 105c and 105d, and the terminals 106c and 106d are connected.

  Accordingly, currents input to the terminals 101a, 102a, 105a, and 106a are output from the terminals 101d, 102d, 105d, and 106d, respectively, and the other terminals are electrically disconnected.

(Position P1)
Next, the block circuit BL1 when the position P1 is selected by the selector SL1 will be described.

  The block circuit BL1 inputs the current Ib from the current tester 4 to the terminals T13 and T14, and outputs the current Ib from the terminals T17 and T18 through the terminals 107a and 108a and the terminals 107d and 108d sequentially. The current Ib output from the terminals T17 and T18 flows through the primary side of the zero-phase current transformer 5. As a result, the secondary-side current Ib 'is output from the zero-phase current transformer 5 and is input to the terminals T15 and T16 through the milliampere meter 6. The current Ib 'is output from the connection points S13 and S14 via the terminals 109a and 110a and the terminals 109d and 110d, and is input to the connection points S21 and S22 of the block circuit BL2.

  Therefore, the block circuit BL1 flows the current Ib input from the current tester 4 to the primary side of the zero-phase current transformer 5. The secondary current Ib 'thus obtained is passed through the milliampere meter 6 and output to the block circuit BL2.

  The selection of the position P1 is a setting mainly for performing a characteristic test of 67GR3.

(Position P2)
Next, the block circuit BL1 when the position P2 is selected by the selector SL1 will be described.

  The block circuit BL1 inputs the current Ia from the current tester 3 to the terminals T11 and T12, and sequentially outputs the connection points S11 and S12 to the block circuit BL6 via the terminals 101a and 102a and the terminals 101d and 102d. Further, the block circuit BL1 inputs the current Ib from the current tester 4 to the terminals T13 and T14, and sequentially outputs the connection points S13 and S14 to the block circuit BL2 through the terminals 103a and 104a and the terminals 103d and 104d. To do.

  Therefore, the block circuit BL1 outputs the current Ia input from the current tester 3 from the connection points S11 and S12, and outputs the current Ib input from the current tester 4 from the connection points S13 and S14.

  The selection of the position P2 is a setting mainly for conducting a characteristic test of 87R8.

(Position P3)
Next, the block circuit BL1 when the position P3 is selected by the selector SL1 will be described.

  The block circuit BL1 inputs the current Ia from the current tester 3 to the terminals T11 and T12, and sequentially outputs the connection points S11 and S12 to the block circuit BL6 via the terminals 101a and 102a and the terminals 101d and 102d. Further, the block circuit BL1 inputs the current Ib from the current tester 4 to the terminals T13 and T14, and sequentially outputs the connection points S11 and S12 to the block circuit BL6 via the terminals 105a and 106a and the terminals 105d and 106d. To do.

  Therefore, when a current obtained by combining the current Ia and the current Ib is Ia + b, the block circuit BL1 connects the current Ia + b to the connection point by the current Ia input from the current tester 3 and the current Ib input from the current tester 4. Output from S11, S12 to block circuit BL6.

  The selection of the position P3 is a setting mainly for performing a 51SR9 characteristic test.

(Block circuit BL6)
With reference to FIG. 1, the configuration and operation method of the block circuit BL6 will be described.

  The block circuit BL6 mainly includes a switch SWC. The switch SWC can select and connect any one of the contact C1 and the contact C2. The switch SWC is, for example, a manual toggle switch.

  The block circuit BL6 selects the current Ia and the current Ia + b input from the block circuit BL1 depending on which of the contact C1 and the contact C2 of the switch SWC is selected and connected to the input unit 22 as a line current or a phase current. Decide whether to flow in.

  When the block circuit BL6 selects and connects the contact C1 of the switch SWC, the current Ia and the current Ia + b input from the block circuit BL1 to the connection points S61 and S62 are output from the connection points S63 and S64, and the block circuit BL4. To the connection points S41 and S42.

  Therefore, the block circuit BL6 inputs the current Ia and the current Ia + b input from the block circuit BL1 to the input unit 21 via the block circuit BL4.

  When the block circuit BL6 selects and connects the contact C2 of the switch SWC, the current Ia and the current Ia + b input from the block circuit BL1 to the connection points S61 and S62 are output from the connection points S63 and S65, and the block circuit BL4. To the connection points S41 and S43.

  Therefore, the block circuit BL6 inputs the current Ia and the current Ia + b input from the block circuit BL1 to the input unit 21 via the block circuit BL4.

(Block circuit BL2)
The configuration and operation method of the block circuit BL2 will be described with reference to FIG.

  The block circuit BL2 mainly includes a switch SWA. The switch SWA has contacts A1, A2, A3, and A4, and these contacts are all interlocked. The switch SWA is, for example, a manual toggle switch.

  The block circuit BL2 determines to which input unit the voltage Va and the voltage Vb from the voltage tester 7 and the voltage tester 8 and the current Ib ′ and the current Ib from the block circuit BL1 are respectively input according to the selection of the switch SWA. decide.

(Switch SWA)
Next, the switch SWA will be described. The switch SWA is, for example, a manual toggle switch. The contacts A1, A2, A3, and A4 are interlocked. When the contact A1 selects contact with the contact A11 (hereinafter referred to as “one-side selection”), the contact A2 is contacted with the contact A21. A3 contacts the contact A31, and the contact A4 contacts the contact A41. When contact with the contact A12 is selected by the contact A1 (hereinafter referred to as “2-side selection”), the contact A2 is contact A22, the contact A3 is contact A32, and the contact A4 is contact A42. Contact. Similarly, the contacts other than the contact A1 operate in conjunction with each other.

(1 side selection)
Next, the block circuit BL2 when one side is selected in the switch SWA will be described.

  When the block circuit BL2 selects one side, the current Ib input from the connection points S13 and S14 of the block circuit BL1 to the connection points S21 and S22 is output from the connection points S23 and S24, and the connection point S31 and S22 of the block circuit BL3. Input to S32. The voltages Va and Vb input from the voltage testers 7 and 8 to T21 to T24 are the voltage V3, which forms a three-phase alternating current by the V connection, and the R phase, S phase, and T from the connection points S25, S26, and S27, respectively. Output as a phase and input to the connection points S51, S52, S53 of the block circuit BL5.

  The one-side selection is a setting mainly for performing a characteristic test of 67R4, 78R5, and 84R10.

(2 side selection)
Next, the block circuit BL2 when the switch SWA is selected on the two side will be described.

  When the block circuit BL2 selects the two sides, the current Ib 'input from the connection points S13 and S14 of the block circuit BL1 to the connection points S21 and S22 is output from the terminals T25 and T26 and input to the input unit 25. The voltage Va input from the voltage tester 7 to T21 and T23 is output from the terminals T27 and T28 and input to the input unit 26.

  The 2-side selection is a setting mainly for performing a characteristic test of 67GR3.

(Block circuit BL3)
With reference to FIG. 1, the configuration and operation method of the block circuit BL3 will be described.

  The block circuit BL3 mainly includes a switch SWD. The switch SWD can arbitrarily select and connect one of the contact D1 and the contact D2. The switch SWD is, for example, a manual toggle switch.

  The block circuit BL3 connects the connection points S23 and S24 and the connection points S31 and S32 of the block circuit BL2, respectively. The connection point S31 is electrically connected to the connection point S33.

  The block circuit BL3 selects whether the current Ib input from the block circuit BL2 flows to the input unit 22 as a line current or a phase current depending on which of the contact D1 and the contact D2 of the switch SWD is selected and connected. To decide.

  When the contact D1 of the switch SWD is selected and connected, the current Ib input from the block circuit BL2 to the connection points S31 and S32 is output from the connection points S33 and S34 and input to the connection points S44 and S45 of the block circuit BL4. To do.

  Therefore, the block circuit BL3 inputs the current Ib input from the block circuit BL2 to the input unit 22 via the block circuit BL4.

  When the contact D2 of the switch SWD is selected and connected, the current Ib input from the block circuit BL2 to the connection points S31 and S32 is output from the connection points S33 and S35 and input to the connection points S44 and S46 of the block circuit BL4. To do.

  Therefore, the block circuit BL3 inputs the phase current from the current Ib input from the block circuit BL2 to the input unit 22 via the block circuit BL4.

(Block circuit BL4)
The configuration and operation method of the block circuit BL4 will be described with reference to FIG.

  The block circuit BL4 mainly includes a switch SW2. The switch SW2 has a selector SL2, and can arbitrarily select position R, position S, and position T. The switch SW2 is a switch having the same structure as the switch SW1.

  The block circuit BL4 is in any phase with respect to the input unit 21 for the current Ia and the current Ia + b from the block circuit BL6 and the input unit 22 for inputting the current Ib from the block circuit BL3 depending on the position selected by the selector SL2. Decide whether to enter. Since the selection of the phases for the two input units is performed in conjunction with each other, the input unit 21 and the input unit 22 select the same phase.

  The switch SW2 has the same configuration as that of the switch SW1, and a description thereof will be omitted.

(Position R)
Next, the block circuit BL4 when the position R is selected by the selector SL2 will be described.

  A case where the contact C1 of the switch SWC is selected in the block circuit BL6 will be described.

  The block circuit BL4 inputs the currents Ia and Ia + b from the connection points S63 and S64 of the block circuit BL6 to the connection points S41 and S42, and sequentially connects the terminals 201a and 202a and the terminals 201d and 202d to the terminals T41 and T42. Are input to the terminals 211 and 212 of the input unit 21, respectively.

  Therefore, the block circuit BL4 simulates the line current between the RS phases of the current I1 in the power system by inputting the current Ia and the current Ia + b input from the block circuit BL6 to the terminals 211 and 212 of the input unit 21. Can do.

  A case where the contact point D1 of the switch SWD is selected in the block circuit BL3 will be described.

  The block circuit BL4 inputs the current Ib from the connection points S33 and S34 of the block circuit BL3 to the connection points S44 and S45, and outputs the currents from the terminals T45 and T46 through the terminals 207a and 208a and the terminals 207d and 208d sequentially. , Input to the terminals 221, 222 of the input unit 22, respectively.

  Therefore, the block circuit BL4 can simulate the line current between the RS phases of the current I2 in the power system by inputting the current Ib input from the block circuit BL3 to the terminals 221 and 222 of the input unit 22.

  A case where the contact C2 of the switch SWC is selected in the block circuit BL6 will be described.

  The block circuit BL4 inputs the current Ia and the current Ia + b from the connection points S63 and S65 of the block circuit BL6 to the connection points S41 and S43. The connection point S43 is electrically connected to the terminal T44. The connection point S41 is electrically connected to the terminal T41 through the terminal 201a and the terminal 201d in order. The current Ib input to the connection points S41 and S43 is output from the terminals T41 and T44 and input to the terminals 211 and 214 of the input unit 21, respectively.

  Therefore, the block circuit BL4 can simulate the R-phase current of the current I1 in the power system by inputting the current Ia and the current Ia + b input from the block circuit BL6 to the terminals 211 and 214 of the input unit 21. it can.

  A case where the contact point D2 of the switch SWD is selected in the block circuit BL3 will be described.

  The block circuit BL4 inputs the current Ib from the connection points S33 and S35 of the block circuit BL3 to the connection points S44 and S46. The connection point S46 is electrically connected to the terminal T48. The connection point S44 is electrically connected to the terminal T45 through the terminal 207a and the terminal 207d in this order. The current Ib input to the connection points S44 and S46 is output from the terminals T45 and T48 and input to the terminals 221 and 224 of the input unit 22, respectively.

  Therefore, the block circuit BL4 can simulate the R-phase current of the current I2 in the power system by inputting the current Ib input from the block circuit BL3 to the terminals 221 and 224 of the input unit 22.

(Position S)
Next, the block circuit BL4 when the position S is selected by the selector SL2 will be described. Since the basic circuit configuration is the same as that when position R is selected, details are omitted.

  A case where the contact C1 of the switch SWC is selected in the block circuit BL6 will be described.

  The block circuit BL4 inputs the current Ia and the current Ia + b from the connection points S63 and S64 of the block circuit BL6 to the connection points S41 and S42, thereby inputting the currents in the power system to the terminals 212 and 213. The line current between the ST phases of I1 can be simulated.

  A case where the contact point D1 of the switch SWD is selected in the block circuit BL3 will be described.

  The block circuit BL4 inputs the current Ib from the connection points S33 and S34 of the block circuit BL3 to the connection points S44 and S45, thereby inputting the currents Ib to the terminals 222 and 223 of the input unit 22 and the ST phase of the current I2 in the power system. The line-to-line current can be simulated.

  A case where the contact C2 of the switch SWC is selected in the block circuit BL6 will be described.

  The block circuit BL4 inputs the current Ia and the current Ia + b from the connection points S63 and S65 of the block circuit BL6 to the connection points S41 and S43, thereby inputting them to the terminals 212 and 214 of the input unit 21, and the current in the power system The phase current of the S phase of I1 can be simulated.

  A case where the contact point D2 of the switch SWD is selected in the block circuit BL3 will be described.

  The block circuit BL4 inputs the current Ib from the connection points S33 and S34 of the block circuit BL3 to the connection points S44 and S45, thereby inputting the current Ib to the terminals 222 and 223 of the input unit 22, and the ST of the current I2 in the power system. The line current between phases can be simulated.

(Position T)
Next, the block circuit BL4 when the position T is selected by the selector SL2 will be described. Since the basic circuit configuration is the same as that when position R is selected, details are omitted.

  A case where the contact C1 of the switch SWC is selected in the block circuit BL6 will be described.

  The block circuit BL4 inputs the current Ia and the current Ia + b from the connection points S63 and S64 of the block circuit BL6 to the connection points S41 and S42, thereby inputting the current Ia and the current Ia + b to the terminals 213 and 211 of the input unit 21. The line current between the TR phases of I1 can be simulated.

  A case where the contact point D1 of the switch SWD is selected in the block circuit BL3 will be described.

  The block circuit BL4 inputs the current Ib from the connection points S33 and S34 of the block circuit BL3 to the connection points S44 and S45, thereby inputting the currents Ib to the terminals 223 and 221 of the input unit 22 between the TR phases of the current I2 in the power system. The line-to-line current can be simulated.

  A case where the contact C2 of the switch SWC is selected in the block circuit BL6 will be described.

  The block circuit BL4 inputs the current Ia and the current Ia + b from the connection points S63 and S65 of the block circuit BL6 to the connection points S41 and S43, thereby inputting the current Ia and the current Ia + b to the terminals 213 and 214 of the input unit 21. The phase current of the T1 phase of I1 can be simulated.

  A case where the contact point D2 of the switch SWD is selected in the block circuit BL3 will be described.

  The block circuit BL4 inputs the current Ib from the connection points S33 and S34 of the block circuit BL3 to the connection points S44 and S45, thereby inputting the currents Ib to the terminals 223 and 221 of the input unit 22 and TR of the current I2 in the power system. The line current between phases can be simulated.

(Block circuit BL5)
The configuration and operation method of the block circuit BL5 will be described with reference to FIG.

  The block circuit BL5 mainly includes a switch SWB. The switch SWB can arbitrarily select and connect one of the contact B1 and the contact B2. The switch SWB is, for example, a manual toggle switch.

  The block circuit BL5 determines an input unit for inputting the voltage V3 input from the block circuit BL2 depending on which of the contact B1 and the contact B2 of the switch SWB is selected and connected.

  When the contact B1 of the switch SWB is selected and connected, the voltage V3 input from the block circuit BL2 to the connection points S51, S52, and S53 is output from the terminals T51, T53, and T54, and the terminals 231 and 232 of the input unit 23 are output. , 233 respectively.

  Therefore, the block circuit BL5 inputs the voltage V3 input from the block circuit BL2 to the terminals 231, 232, and 233 of the input unit 23, so that each of the R phase, S phase, and T phase of the voltage V1 in the power system The voltage can be simulated.

  When the contact B2 of the switch SWB is selected and connected, the voltage V3 input from the block circuit BL2 to the connection points S51, S52, S53 is output from the terminals T52, T53, T54, and the terminal 241 of the input unit 24 is input. Input to the terminals 232 and 233 of the unit 23, respectively.

  Therefore, the block circuit BL5 inputs the R phase of the voltage V3 input from the block circuit BL2 to the terminal 241 of the input unit 24 and the S phase and the T phase to the terminals 232 and 233 of the input unit 23, thereby The S phase and the T phase of the voltage ΔVR and the voltage V1 can be simulated.

(Test method according to the first embodiment)
With reference to FIGS. 1-4 and FIGS. 15-24, the method of the characteristic test of each element which has in the protection relay 2 by 1st Embodiment is demonstrated.

  First, as described above, the test circuit is configured by connecting the invention according to the first embodiment and all other devices as preparation for the test as described above. The characteristic test of each element is performed as follows. Also, description of conditions such as switches that are not relevant for the characteristic test of each element will be omitted.

  The characteristic test of 51R1 will be described.

  As shown in FIG. 15, a test is performed by passing a phase current through terminals 211, 212, 213, and 214 of the input unit 21. Accordingly, the switch SW1 is selected as the position P2, and the switch SWC is selected as the contact C2.

  By switching the switch SW2, the current Ia from the current tester 3 is input to each of the R-phase, S-phase, and T-phase of the input unit 21 to test each phase. Position R is selected when testing the R phase, position S is selected when testing the S phase, and position T is selected when testing the T phase.

  The characteristic test of 51R2 will be described.

  As shown in FIG. 16, a line current is passed through terminals 211, 212, and 213 of the input unit 21 to perform the test. Accordingly, the switch SW1 is selected as the position P2, and the switch SWC is selected as the contact C1.

  By switching the switch SW2, the current Ia from the current tester 3 is input between the R-phase, S-phase, and T-phase lines of the input unit 21, and the test between the lines is performed. Position R is selected when testing the RS phase, position S is selected when testing the ST phase, and position T is selected when testing the TR phase.

  The characteristic test of 51R6 will be described.

  As shown in FIG. 17, a test is performed by passing a phase current through terminals 221, 222, 223, 224 of the input unit 22. Therefore, the switch SW1 is selected as the position P2, the switch SWA is selected as one side, and the switch SWD is selected as the contact D2.

  By switching the switch SW2, the current Ib from the current tester 4 is input to the R-phase, S-phase, and T-phase of the input unit 22, and each phase is tested. Position R is selected when testing the R phase, position S is selected when testing the S phase, and position T is selected when testing the T phase.

  The characteristic test of 51R7 will be described.

  As shown in FIG. 18, a test is performed by passing a current between terminals 221, 222, and 223 of input portion 22. Therefore, the switch SW1 is selected as the position P2, the switch SWA is selected as one side, and the switch SWD is selected as the contact D1.

  By switching the switch SW2, the current Ib from the current tester 4 is input between the R-phase, S-phase, and T-phase lines of the input unit 22 to perform a test between the lines. Therefore, position R is selected when testing the RS phase, position S is selected when testing the ST phase, and position T is selected when testing the TR phase.

  A characteristic test of 67GR3 will be described.

  As shown in FIG. 19, a test is performed by applying a zero-phase current to the terminals 251 and 252 of the input unit 25 and applying a zero-phase voltage to the terminals 261 and 262 of the input unit 26. Accordingly, the switch SW1 is selected as the position P1, the switch SWA as the 2-side selection, and the switch SWD as the contact D1.

  As a result, the current Ib from the current tester 4 flows, the current Ib ′ output from the secondary side of the zero-phase current transformer 5 is input to the input unit 25, and the voltage Va from the voltage tester 7 is input to the input unit. 26 to enter the test.

  A characteristic test of 67R4 will be described.

  As shown in FIG. 20, a test is performed by applying a three-phase AC voltage to the terminals 231, 232, 233 of the input unit 23 and flowing a phase current to the terminals 221, 222, 223, 224 of the input unit 22. Accordingly, the switch SW1 is selected as the position P2, the switch SWA is selected as one side, the switch SWD is selected as the contact D2, and the switch SWB is selected as the contact B1.

  As a result, the three-phase AC voltage V <b> 3 formed by the voltage Va from the voltage tester 7 and the voltage Vb from the voltage tester 8 is input to the input unit 23. In addition, by switching the switch SW2, the current Ib from the current tester 4 is input to the R phase, S phase, and T phase of the input unit 22, and each phase is tested. Position R is selected when testing the R phase, position S is selected when testing the S phase, and position T is selected when testing the T phase.

  The characteristic test of 78R5 will be described.

  As shown in FIG. 21, voltages corresponding to the S-phase and T-phase of the three-phase AC voltage are applied to the terminals 232 and 233 of the input unit 23, respectively, and the R-phase of the same three-phase AC voltage is applied to the terminal 241 of the input unit 24. The test is performed by applying a voltage corresponding to. Accordingly, the switch SWA is selected as one side and the switch SWB is selected as the contact B2.

  As a result, the three-phase AC voltage V3 formed by the voltage Va from the voltage tester 7 and the voltage Vb from the voltage tester 8 is input to the S phase, the T phase, and the input unit 24 of the input unit 23.

  The characteristic test of 87R8 will be described.

  As shown in FIG. 22, a test is performed by passing a phase current through terminals 211, 212, 213, and 214 of the input unit 21 and a phase current through terminals 221, 222, 223, and 224 of the input unit 22. Accordingly, the switch SW1 is selected as the position P2, the switch SWC is selected as the contact C2, the switch SWA is selected as one side, and the switch SWD is selected as the contact D2.

  By switching the switch SW2, the current Ia from the current tester 3 is input to each of the R phase, S phase, and T phase of the input unit 21, and the current Ib from the current tester 4 is simultaneously input to the input unit 22 A current is input to each of the R phase, S phase, and T phase, and each phase is tested. Position R is selected when testing the R phase, position S is selected when testing the S phase, and position T is selected when testing the T phase. The switch SW2 always selects the same phase as the phase input to the input unit 21 and the phase input to the input unit 22. With one operation, the phases of the two input sections to which current is input can be switched simultaneously.

  A characteristic test of 51SR9 will be described.

  As shown in FIG. 23, a test is performed by passing a phase current through the terminals 211, 212, 213, and 214 of the input unit 21. Further, in order to perform the test of this element, it is necessary to input a large current, and it is necessary to input the current Ia + b obtained by combining the current Ia from the current tester 3 and the current Ib from the current tester 4 to the input unit 21 There is. Accordingly, the switch SW1 is selected as the position P3, and the switch SWC is selected as the contact C2.

  By switching the switch SW2, a current Ia + b obtained by synthesizing the current Ia from the current tester 3 and the current Ib from the current tester 4 is input to the R phase, S phase, and T phase of the input unit 21. Test each phase. Position R is selected when testing the R phase, position S is selected when testing the S phase, and position T is selected when testing the T phase.

  The characteristic test of 84R10 will be described.

  As shown in FIG. 24, a test is performed by applying a three-phase AC voltage to the terminals 231, 232, and 233 of the input unit 23. Therefore, the switch SWA is selected as one side, and the switch SWD is selected as the contact D2.

  Thus, the three-phase AC voltage V3 formed by the voltage Va from the voltage tester 7 and the voltage Vb from the voltage tester 8 is input to the input unit 23 for testing.

(Operation and effect of the first embodiment)
As described above, according to the present embodiment, once the test circuit is connected to prepare for the test, the test circuit configuration can be easily switched by a switch or the like. Characteristic tests can be performed at multiple observation points of the element.

  Therefore, it is possible to reduce work errors such as work time and miswiring due to manual connection of test wiring and the like.

(Second Embodiment)
Hereinafter, the second embodiment will be described with reference to FIGS. 10, 11, and 12.

(Configuration of Second Embodiment)
With reference to FIG. 10, the test assistance apparatus 1 which concerns on 2nd Embodiment is mainly demonstrated about a different part from the test assistance apparatus 1 which concerns on 1st Embodiment. About the same part, the same code | symbol is attached | subjected and the detailed description is abbreviate | omitted. In the following embodiments, the same description is omitted.

  In the test auxiliary apparatus 1 according to the second embodiment, the switch SW1 of the block circuit BL1 and the switch SW2 of the block circuit BL4 are replaced with the switch SW1R and the switch SW2R, respectively, in the test auxiliary apparatus 1 according to the first embodiment. The circuit is the same except that a circuit for configuring is added.

  The switch SW1R has electromagnetic relays Ry12, Ry13, Ry14, and the switch SW2R has electromagnetic relays Ry21, Ry22, Ry23.

  The electromagnetic relays Ry11, Ry12, Ry13 and the electromagnetic relays Ry21, Ry22, Ry23 are connected to the operation unit CTR and the power source PW.

  The power source PW is a power source that supplies AC power of 100 volts to an electromagnetic relay, which will be described later, as a power source for operation, for example.

  The operation unit CTR1 has buttons P1, P2, and P3.

  The operation unit CTR2 has buttons R, S, and T.

  The buttons P1, P2, and P3 of the operation unit CTR1 are for operating the electromagnetic relays Ry11, Ry12, and Ry13 of the switch SW1, respectively, when pressed.

  The buttons R, S, and T of the operation unit CTR2 are used to operate the electromagnetic relays Ry21, Ry22, and Ry23 of the switch SW2 when pressed.

  The electromagnetic relays Ry11, Ry12, Ry13 are devices for configuring a circuit equivalent to the circuit when the positions P1, P2, P3 are respectively selected in the selector SL1 of the switch SW1.

  The electromagnetic relays Ry21, Ry22, Ry23 are devices for configuring a circuit equivalent to the circuit when the positions R, S, T are selected in the selector SL2 of the switch SW2.

(Switch SW1R)
The circuit of the switch SW1R will be described with reference to FIG.

  When the button P1 of the operation unit CTR1 is pressed, the coil CP1 of the electromagnetic relay Ry is excited by the current or voltage supplied from the power source PW. When CP1 is excited, the contacts P11, P12, P13, and P14 make their respective contacts. When the contact of the contact P11 is made, conduction is established between the terminal 107a and the terminal 107d. Similarly, by making the contacts of the contacts P12, P13, and P14, the terminals 108a and 108d, the terminals 109a and 109d, and the terminals 110a and 110d are electrically connected.

  As a result, the circuit of the switch SW1R when the button P1 is pressed in the operation unit CTR1 is equivalent to the circuit of the switch SW1 when the position P1 is selected in the selector SL1.

  Similarly, the switch SW1R circuit when the buttons P2 and P3 of the operation unit CTR1 are pressed is the same circuit as the switch SW1 circuit when the positions P2 and P3 are selected in the selector SL1.

(Switch SW2R)
A circuit of the switch SW2R will be described with reference to FIG.

  The circuit of the switch SW2R when the buttons R, S, and T of the operation unit CTR2 are pressed is configured according to the same principle as the switch SW1R.

  When the button R of the operation unit CTR2 is pressed, the distance between the terminal 201a and the terminal 201d, the terminal 202a and the terminal 202d, the terminal 207a and the terminal 207d, and the terminal 208a and the terminal 208d is determined according to the same principle as in the operation unit CTR1. Conduct.

  When the button S of the operation unit CTR2 is pressed, the distance between the terminals 203a and 203d, the terminals 204a and 204d, the terminals 209a and 209d, and the terminals 210a and 210d is determined according to the same principle as in the operation unit CTR1. Conduct.

  When the button T of the operation unit CTR2 is pressed, the terminals 205a and 205d, the terminals 206a and 206d, the terminals 211a and 211d, and the terminals 212a and 212d are electrically connected.

  Accordingly, the circuit of the switch SW2R when the buttons R, S, and T of the operation unit CTR2 are pressed is equivalent to the circuit of the switch SW2 when the positions R, S, and T are selected in the selector SL2.

(Operation / Effect of Second Embodiment)
As described above, according to the present embodiment, in addition to the operations and effects of the first embodiment, there are the following operations and effects.

  By pressing the button on the operation unit, the test circuit configuration can be switched more easily. Further, by separating the operation unit from the main body of the test auxiliary device, the test auxiliary device can be operated at an arbitrary place.

(Third embodiment)
Hereinafter, the third embodiment will be described with reference to FIGS. 5 and 6.

(Elements according to the third embodiment)
Elements targeted for the characteristic test by the test auxiliary device according to the third embodiment are 67R4, 78R5, 51R6, and 51R7.

(Configuration of Third Embodiment)
FIG. 5 is a block configuration diagram for explaining a connection circuit of a test method using the test auxiliary device 11 according to the third embodiment.

  The test auxiliary device 11 includes a third output mode selection unit such as a block circuit BL3, a first phase selection unit such as a block circuit BL41, and a voltage input selection unit such as the block circuit BL21 and the block circuit BL5 as follows. It is configured.

  The block circuit BL2 is connected so that a voltage is input from the tester and output to the block circuit BL5. The block circuit BL2 is connected to the connection points S25, S26, S27 and the connection points S51, S52, S53 of the block circuit BL5, respectively.

  The block circuit BL31 is connected to output the current input from the block circuit BL2 to the block circuit BL41. The block circuit BL31 is connected to the connection points S33, S34, and S35 at connection points S44, S45, and S46 of the block circuit BL4, respectively.

(Connection configuration with other devices according to the third embodiment)
Next, referring to FIG. 5, as a preparation for the characteristic test, connection between the test auxiliary device 11 and other devices will be described.

  The block circuit BL31 connects the current tester 4 to terminals T31 and T32.

  In the block circuit BL21, the voltage tester 7 is connected to terminals T21 and T23, and the voltage tester 8 is connected to terminals T24 and T22, respectively.

  The block circuit BL41 connects the terminals 221, 222, 223, and 224 of the input unit 22 of the protective relay 2 to the terminals T45, T46, T47, and T48, respectively.

  Hereinafter, with reference to the drawings, each block circuit will be described in a state of being connected as described above. However, the block circuit BL5 is the same as that in the first embodiment, and a description thereof will be omitted.

(Block circuit BL31)
The block circuit BL3 will be described with reference to FIG.

  In the block circuit BL31, the connection points S31 and S32 connected to the block circuit BL1 in the block circuit BL3 are changed to terminals T31 and T32, and the current tester 4 is connected thereto.

  Other points are the same as those of the block circuit BL3.

(Block circuit BL41)
The block circuit BL41 will be described with reference to FIG.

  In the block circuit BL41, the connection points S41 to S43 and the terminals T41 to T44 and all the wirings connected thereto are removed from the block circuit BL4.

  In the switch SW21, the terminals 201a to 206d and all the wirings connected to the terminals 201a to 206d are removed from the switch SW2.

  The other points are the same as the block circuit BL4.

(Block circuit BL21)
The block circuit BL21 will be described with reference to FIG.

  The block circuit BL21 includes terminals T21 to T24, connection points S25 to S27, and wirings connecting them.

  The voltages Va and Vb input from the voltage testers 7 and 8 to T21 to T24 are output as the voltage V3, which forms a three-phase alternating current by the V connection, and the connection points S25, S26, and S27 as the R phase, S phase, and T phase, respectively. And input to the connection points S51, S52, and S53 of the block circuit BL5, respectively.

(Operations and effects of the third embodiment)
As described above, according to the present embodiment, when performing the characteristic test of 67R4, 78R5, 51R6 and 51R7, work errors such as work time and miswiring are reduced by manually changing test wirings. Therefore, the test auxiliary device 1 can be made more compact.

(Fourth embodiment)
Hereinafter, the fourth embodiment will be described with reference to FIGS. 7, 8, and 9.

(Elements according to the fourth embodiment)
Elements that are the targets of the characteristic test by the test auxiliary device according to the fourth embodiment are 67GR3, 51R6, and 51R7.

(Configuration of Fourth Embodiment)
FIG. 7 is a block configuration diagram for explaining a connection circuit of a test method using the test auxiliary device 12 according to the fourth embodiment.

  The test auxiliary device 12 includes current selection means such as a block circuit BL12, interlock selection means such as the block circuit BL22, second output form selection means such as the block circuit BL3, and second phase selection means such as a block circuit. BL41 is configured as follows.

  The block circuit BL12 is connected so that current is input from the tester and current is output to the block circuit BL22. The block circuit BL12 is connected to the connection points S13 and S14 at the connection points S21 and S22 of the block circuit BL22, respectively.

  The block circuit BL22 is connected to output the current input from the block circuit BL12 to the block circuit BL3. The block circuit BL22 is connected to the connection points S23 and S24 at the connection points S31 and S32 of the block circuit BL3, respectively.

  The block circuit BL3 is connected to output the current input from the block circuit BL2 to the block circuit BL4. The block circuit BL3 is connected to the connection points S33, S34, and S35 at connection points S44, S45, and S46 of the block circuit BL41, respectively.

(Connection configuration with other devices according to the fourth embodiment)
Next, with reference to FIG. 7, connection between the test auxiliary device 11 and other devices will be described as preparation for the characteristic test.

  In the block circuit BL12, the current tester 4 is connected to terminals T13 and T14, and the zero-phase current transformer 5 is connected to terminals T17 and T18. An electric wire from which the secondary current of the zero-phase current transformer is output is connected to the terminals T15 and T16 through the milliampere meter 6.

  The block circuit BL22 connects the voltage tester 7 to terminals T21 and T23.

  The block circuit BL41 connects the terminals 221, 222, 223, and 224 of the input unit 22 of the protective relay 2 to the terminals T45, T46, T47, and T48, respectively.

  Hereinafter, with reference to the drawings, each block circuit will be described in a state of being connected as described above. However, the block circuit BL3 is the same as that of the first embodiment, and the block circuit BL41 is the same as that of the third embodiment, so the description thereof is omitted.

(Block circuit BL12)
The block circuit BL12 will be described with reference to FIG.

  In the block circuit BL12, the terminals T11 and T12, the connection points S11 and S12, and all the wirings connected thereto are removed from the block circuit BL1.

  In the switch SW12, the terminals 101a to 202d and the terminals 105a to 106d and all the wirings connected thereto are removed from the switch SW1.

  The selector 12 has a portion corresponding to the position P3 in the selector 1 removed.

  Other points are the same as those of the block circuit BL12.

(Block circuit BL22)
The block circuit BL22 will be described with reference to FIG.

  In the block circuit BL22, the terminals T22 and T24, the connection points S25, S26, and S27 and all the wirings connected thereto are removed from the block circuit BL2.

  Other points are the same as those of the block circuit BL2.

(Operation / Effect of Fourth Embodiment)
As described above, according to the present embodiment, when performing the characteristic test of 67GR3, 51R6, and 51R7, it is possible to reduce work errors such as work time and incorrect wiring due to manual connection of test wiring. The test auxiliary device 1 can be made more compact.

  The present invention is not limited to the embodiment described above, and can be implemented with various modifications.

(1) In the present embodiment, a digital protective relay is assumed as the electrical equipment to be tested. However, a protective relay configured by an electromagnetic or static relay may be used. Moreover, as long as an element is included in the electrical equipment, it may be a power conversion device, a power system control device, or the like.

(2) The connection point is a point provided for convenience in describing each embodiment, and there may be no connection point such as a wiring at the corresponding location, or a terminal may be used instead. Similarly, the terminals may be eliminated or replaced with connection points.

(3) Although the element characteristic test has been described in the present embodiment, it may be used for a relay sequence test or an actual machine test. Moreover, you may use in order to test the measurement function which has the test which is not related to operation | movement / non-operation of an element, for example, an electrical installation etc.

(4) The switch SW2 is interlocked so that the phases input to the input unit 21 and the input unit 22 are always the same. However, by providing a switch similar to the switch SW2, different input phases can be selected. It may be. In this case, since the current Ia output from the current tester 3 and the current Ib output from the current tester 4 flow separately without interfering with each other, the element that operates according to the input unit 21 and the input unit 22 It is possible to test the characteristics of the operating elements simultaneously.

(5) The switch SWA of the block circuit BL22 is not provided with a wiring in the case of selecting one side, but a new circuit may be added by providing a terminal or a wiring. For example, two new terminals for outputting a voltage may be provided, and the voltage may be applied to an input unit other than the input unit 26 when one side is selected.

(6) In the block circuit BL2 and the block circuit BL21, the voltage tester 7 is connected to the terminals T21 and T23, and the voltage tester 8 is connected to the terminals T24 and T22. , T24 may be connected. It can be changed according to the test equipment.

(7) In the second embodiment, the operation units CTR1 and CTR2 do not have to be integrated with other parts of the test auxiliary device 1. By separating only the operation parts CTR1 and CTR2 and making them easy to move, they can be installed at any place, and by installing them at any place where the tester can easily test, the efficiency of the test can be increased. .

(8) In the second embodiment, the switches SW1 and SW2 of the test auxiliary device 1 are replaced with the switches SW1R and SW2R using electromagnetic relays. However, the test auxiliary devices 11 and 12 are similarly electromagnetic relays. It is good also as a structure replaced with the switch using. In this case, in addition to the operations and effects of the respective embodiments, there are operations and effects of the second embodiment such that the test circuit configuration can be easily switched.

(9) The power source PW may be one that mediates electricity without generating power itself. For example, it may be an outlet for obtaining electricity from a commercial power source, or it may be a terminal block that mediates electricity from another generator or the like. In this case, since the test auxiliary device itself does not have a structure or circuit for generating power, the device can be reduced in weight and size.

(10) The auxiliary test device in each embodiment may be provided with extra terminals and terminal blocks. It can be used freely when testing electrical equipment. For example, it may be used for extending test wiring, or another test circuit or tester may be connected.

(11) Various switches are not limited to those described in each embodiment. Any switch can be replaced with any of a rotary type, a toggle type and a button type. Depending on how the switch type is selected, it is possible to configure a device adapted for cost, ease of use, weight reduction, compactness, and the like.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

The block diagram for demonstrating the structure of the apparatus which concerns on the 1st Embodiment of this invention. The figure for demonstrating the structure of block circuit BL1 which concerns on 1st Embodiment. The figure for demonstrating the structure of block circuit BL2 which concerns on 1st Embodiment. The figure for demonstrating the structure of block circuit BL4 which concerns on 1st Embodiment. The block diagram for demonstrating the structure of the apparatus which concerns on 3rd Embodiment. The figure for demonstrating the structure of block circuit BL41 based on 3rd Embodiment. The block diagram for demonstrating the structure of the apparatus which concerns on 4th Embodiment. The figure for demonstrating the structure of block circuit BL12 which concerns on 4th Embodiment. The figure for demonstrating the structure of block circuit BL22 which concerns on 4th Embodiment. The block diagram for demonstrating the main structures of the apparatus which concerns on 2nd Embodiment. The figure for demonstrating switch SW1R which concerns on 2nd Embodiment. The figure for demonstrating switch SW2R which concerns on 2nd Embodiment. The electric power system figure for demonstrating a protection relay. The block diagram for demonstrating the structure of a protection relay. The block diagram for demonstrating overcurrent relay R1. The block diagram for demonstrating overcurrent relay R2. The block diagram for demonstrating overcurrent relay R6. The block diagram for demonstrating overcurrent relay R7. The block diagram for demonstrating earth fault direction relay R3. The block diagram for demonstrating electric power direction relay R4. The block diagram for demonstrating phase comparison relay R5. The block diagram for demonstrating ratio differential relay R8. The block diagram for demonstrating the overcurrent relay R9 which has an inverse time characteristic. The block diagram for demonstrating voltage relay R10.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Test auxiliary device, 2 ... Electric power equipment, 3 ... Current tester, 4 ... Current tester, 5 ... Zero phase current transformer, 6 ... Millimeter, 7 ... Voltage tester, 8 ... Voltage tester

Claims (3)

A device used when testing an electrical equipment to be tested using current simulation means for simulating AC current in a power system and voltage simulation means for simulating AC voltage in the power system,
The electrical equipment is
A three-phase alternating current input means for inputting a three-phase alternating current;
Single-phase alternating current input means for inputting a single-phase alternating current;
A single-phase AC voltage input means for inputting a single-phase AC voltage;
A first relay element that operates according to a phase current of the three-phase alternating current input means;
A second relay element that operates in accordance with a line current of the three-phase alternating current input means;
A third relay element that operates according to the current of the single-phase alternating current input means and the voltage of the single-phase alternating voltage input means;
A first option for outputting the current input from the current simulation means to an external device and outputting a current obtained from the external device; and a second option for outputting the current input from the current simulation means Current selection means for selecting any one of them;
Either a first option for outputting the current input from the current selection means to flow to the three-phase alternating current input means or a second option for outputting to flow to the single-phase alternating current input means When selecting one and selecting the second option, interlocking selection means for outputting the voltage input from the voltage simulation means to be applied to the single-phase voltage input means,
An output form selection means for selecting the current input from the current selection means as one output form of a phase current or a line current; and
When the phase input is selected in the output mode selection unit from the current input from the output mode selection unit, one of the three phases of the three-phase alternating current input unit is arbitrarily selected to output the phase current. And a phase selection means for arbitrarily selecting two phases of the three phases of the three-phase alternating current input means and outputting a line current when the line current is selected. Auxiliary device. The current selection means includes
When the coil is excited, it has at least two electromagnetic relays that are connected between electrically disconnected terminals,
The phase selection means includes
When the coil is excited, it has at least two electromagnetic relays that are connected between electrically disconnected terminals,
The electric equipment test auxiliary device according to claim 1, further comprising an operation unit configured to excite any one of the current selection unit and the phase selection unit to operate the contact. The first relay element is
Having an overcurrent relay or an undercurrent relay that operates according to the current value of the phase current,
The second relay element is
It has an overcurrent relay or an undercurrent relay that operates according to the current value of the line current,
The third relay element is
It is a ground fault direction relay, It has a test auxiliary | assistance apparatus of the electrical installation of Claim 1 or Claim 2 characterized by the above-mentioned.

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