JP5394459B2 - Relay and its adjustment device for test terminal and relay settling method - Google Patents

Description

  The present invention relates to a relay, an adjustment device for a test terminal thereof, and a method for setting the relay, and more particularly, to a device for facilitating settling of a relay panel according to a change in a state on a distribution line side.

  In the case of 6.6kV distribution lines, when the bank (transformer) switching is performed by inserting the main unit CB (circuit breaker), the ground fault bus characteristics change, so it is necessary to reset the relay. is there.

  In order to accurately perform this settling, it is necessary to perform a DG primary test by an artificial ground fault that is performed after a power failure and the ground fault relay is locked, or a settling change by input of a simulated voltage to the relay (for example, a patent) References 1, 2).

  However, the change of the ground fault bus characteristic due to the work such as bank switching is about 1 to 3 days, and since it returns to the ground fault bus characteristic before the work in a short period of time, the DG primary which takes time for setting. Tests are not suitable.

  On the other hand, since it is necessary to reliably protect the grounding of the distribution line, the 64V1 settling is changed by using the variable resistance volume provided in the relay panel, and this 64V1 settling is supported. Then, the settling can be roughly adjusted by visual volume adjustment based on the scale.

JP-A-8-47164 JP 2008-263762 A

  If the 64V1 setting is not a rough volume adjustment but a more accurate setting, the above-mentioned DG primary test or the like is performed, or a digital relay that can be set and changed with high accuracy is used. It is necessary to accurately adjust to a settling value suitable for the twin-wire characteristics.

  However, it is not realistic to perform a time-consuming DG primary test or change to a digital relay for a short-term setting change.

  Further, when returning to a set value before work such as bank switching, the volume is roughly adjusted.

  From this, it is clear that in order to operate the relay in a state where it operates with a set value adjusted with high accuracy, some means capable of adjusting the set value temporarily and accurately without any trouble is necessary. Yes, but it was not realized in reality.

  Therefore, the present invention provides a relay that can easily adjust and change a set value with high accuracy, and can easily return to the original set value, an adjustment device for the test terminal, and a method for setting the relay. It is intended to provide.

  One aspect of the invention of an adjustment device for a test terminal of a relay that solves the above problem is that the distribution line side of the relay that protects the distribution line by detecting a ground fault in the distribution line and operating the relay panel, A base member that enters between a pair of first and second connection electrodes that are interposed in the middle of the wiring between the relay panel sides and maintains the connection state, and blocks the connection state; A first entry electrode provided on the base member so as to be in conductive contact with the first connection electrode on the distribution line side when the two entry electrodes are inserted between the two connection electrodes; Between the second approaching electrode provided on the base member and the first and second approaching electrodes so as to be in conductive contact with the second connection electrode on the relay panel side when approaching between the connection electrodes. Arranged in series with the relay panel side A voltage adjusting unit for adjusting a partial pressure generated between the relay panel side and the first and second approach electrodes and the voltage adjusting unit for each phase of the distribution line. It is provided as a feature.

  One aspect of the invention of a relay that solves the above problem is a relay that protects the distribution line by detecting a ground fault in the distribution line and operating the relay panel, and the distribution line side and the relay panel side In the middle of the wiring for each phase between the two, a voltage adjusting unit that is connected in series with the relay panel side and adjusts a partial pressure generated between the relay panel side is provided.

  One aspect of the invention of the settling method of the relay that solves the above problem is a test terminal that opens to the exterior cover of the relay that protects the distribution line by detecting a ground fault in the distribution line and operating the relay panel The adjustment device for the test terminal is mounted therein, and the partial pressure generated between the first and second connection electrodes and the relay panel side in the voltage adjustment unit is adjusted.

  Thus, according to one aspect of the present invention, the voltage adjustment unit can be interposed in the middle of the wiring for each phase between the distribution line side and the relay panel side, and the partial pressure therebetween can be adjusted. The settling value (voltage) in this system can be divided and adjusted to match the operating voltage of the relay panel. Therefore, without adjusting the settling value of the relay panel itself according to the system, it is possible to set the relay panel so that it operates with high reliability by simply adjusting the voltage dividing part by interposing the voltage adjustment unit. It is possible to return to the original set value simply by removing the voltage adjustment unit. As a result, the voltage adjustment unit can accurately adjust the set value according to the ground fault bus characteristics that have been changed by bank switching, etc., and the relay panel can function reliably in the event of a ground fault. Can be protected.

It is a figure which shows the relay which concerns on one Embodiment of this invention, its adjustment apparatus for test terminals, and the setting method of a relay, and is a conceptual diagram which shows the schematic whole structure of the relay. It is a figure which shows the adjustment apparatus for the test terminal, (a) is the top view, (b) is the side view. It is a partial cross section connection figure in the adjustment apparatus for the test terminal. It is a partial cross section circuit diagram comprised in the adjustment apparatus for the test terminal. It is a figure which shows the test terminal (PTT) with which the relay side is provided, (a) is the top view, (b) is the front view, (c) is the side view, (d) is the back view. It is a figure which shows an example of the existing plug which can be set to the test terminal (PTT) with which the relay side is equipped, (a) is the top view, (b) is the front view, (c) is the side view.

  As one aspect of the embodiment of the adjustment device for a test terminal of the relay of the present invention, the distribution line side of the relay that protects the distribution line by detecting a ground fault in the distribution line and operating the relay panel, A base member that enters between a pair of first and second connection electrodes that are interposed in the middle of the wiring between the relay panel sides and maintains the connection state, and blocks the connection state; A first entry electrode provided on the base member so as to be in conductive contact with the first connection electrode on the distribution line side when the two entry electrodes are inserted between the two connection electrodes; Between the second approaching electrode provided on the base member and the first and second approaching electrodes so as to be in conductive contact with the second connection electrode on the relay panel side when approaching between the connection electrodes. Arranged in series with the relay panel side A voltage adjusting unit for adjusting a partial pressure generated between the relay panel side and the first and second approach electrodes and the voltage adjusting unit for each phase of the distribution line. In addition to the above, the following configuration may be provided.

  As a first other aspect of the embodiment of the adjusting device, the base member is formed in a shape that can be attached to and detached from a test terminal prepared in the relay and can stably maintain the mounting state when mounted. Even when the voltage adjusting unit is arranged at one end exposed from the test terminal, the connection state is cut off by entering between the first and second connection electrodes when the device is mounted. Good.

  In this mode, a test terminal is pre-installed in the relay, and the voltage adjustment is performed by electrically connecting the first and second entry electrodes and the first and second connection electrodes by simply inserting and removing the base member into the terminal. The portion can be interposed between the distribution line and the relay panel. Therefore, it is possible to perform high-accuracy settling by operating one aspect of the present invention without any special design change, etc., and to use the relay panel so that it functions reliably in the event of a ground fault with existing equipment. Can be settled.

  As a second other aspect of the embodiment of the adjusting device, the voltage adjusting unit may be configured to adjust individually or in common for each phase of the distribution line.

  In this aspect, the settling can be adjusted by an operation for each phase of the distribution line or by an operation common to each phase. Accordingly, the set value can be adjusted individually with high accuracy, or the set value can be adjusted quickly.

  As a third other aspect of the embodiment of the adjustment device, the voltage adjustment unit includes a coarse adjustment unit that roughly adjusts a resistance value between the first and second entry electrodes, and the first and second entry. A fine adjustment unit that finely adjusts the resistance value between the electrodes.

  In this aspect, the set value can be adjusted by the coarse adjustment unit and the fine adjustment unit, and after the rough adjustment unit is roughly adjusted, the fine adjustment unit can be adjusted accurately. Therefore, the set value can be adjusted with high accuracy quickly and easily.

  As a fourth other aspect of the embodiment of the adjusting device, the base member is formed in a form to be inserted into an opening formed in an exterior cover of the relay, and the voltage adjusting unit is formed of the base member. A circuit may be formed so as to extend in a direction orthogonal to the insertion direction.

  In this aspect, a circuit can be formed in a direction along the outer surface of the exterior cover into which the base member is inserted. Therefore, it can be installed compactly without being in the form of protruding from the exterior cover.

  As one aspect of the embodiment of the relay of the present invention, a relay that protects the distribution line by detecting a ground fault in the distribution line and operating the relay panel, the distribution line side and the relay panel side In addition to having a voltage adjustment unit that adjusts the partial pressure generated between the relay panel side in series with the relay panel side in the middle of wiring for each phase between Also good.

  As a first other aspect of the embodiment of the relay, it is possible to maintain a connected state in which it is in the middle of wiring between the distribution line side and the relay panel side and to be conductively contacted and to be separated and changed to a cut-off state. While having a pair of 1st, 2nd connection electrodes, you may be provided with any one of said test terminal adjustment apparatuses so that attachment or detachment is possible.

  In this aspect, it may be a form that is permanently installed in the relay, but the above settling device that uses a test terminal previously installed in the relay is attached and detached to perform settling adjustment, so that high-accuracy settling can be performed easily. Can be realized.

  As one aspect of the embodiment of the setting method of the relay of the present invention, a test terminal opened in the exterior cover of the relay that protects the distribution line by detecting a ground fault in the distribution line and operating the relay panel The test terminal adjustment device is mounted inside, and the partial pressure generated between the first and second connection electrodes and the relay panel side in the voltage adjustment unit is adjusted. In addition to the above, the following configuration may be provided.

  As a first other aspect of the embodiment of the method for setting the relay, a voltage dividing ratio between the relay panel side and the voltage adjusting unit corresponding to a change on the distribution line side is obtained, and the voltage dividing ratio is obtained. The voltage adjustment unit may be adjusted based on the basis.

  In this aspect, when there is a temporary change of the system, etc., it is possible to adjust the voltage division with the voltage adjustment unit according to the change of the voltage applied to the relay panel accompanying the change. Therefore, the apparent set value can be kept the same for the relay panel without being affected by the system change, etc., and the relay panel can be set to function reliably in the event of a ground fault. it can.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1-5 is a figure which shows the relay which concerns on one Embodiment of this invention, its adjustment apparatus for test terminals, and the setting method of a relay.

  In FIG. 1, the relay 10 detects that an undervoltage abnormality or an overvoltage abnormality has occurred by connecting a current transformer 11 that detects the distribution state of the distribution line part D to a relay panel (switchgear) 12. Thus, the relay is constructed to operate various relays such as the element 27, the element 64V1, and the element 10G, and functions to protect the distribution line of the system in which a ground fault has occurred.

  This relay 10 performs a DG primary test by an artificial ground fault at the time of installation or the like to set the operating voltage of various relays with high accuracy. In the element 64V1 that operates when an overvoltage is abnormal, the current transformer 10 The voltage value that operates according to the detected voltage of 11 is adjusted by adjusting the volume with a setting mechanism (not shown) using the PT method (transformation by winding) or PD method (transformation by a capacitor) and is set with high accuracy. It should be noted that the settling at the time of installation or the like can be adjusted with high accuracy because it is actually measured and adjusted by performing a DG primary test using an artificial ground fault.

  In addition, a potential test terminal (hereinafter, also simply referred to as PTT) 20 shown in FIG. 5 is prepared in the relay 10, and the PTT 20 is inserted into various test terminal plugs 30 shown in FIG. The test can be performed easily and easily.

  As shown in FIG. 5, the PTT 20 is attached so that the front surface portion 21 constitutes a part of the exterior cover of the relay panel 12 and the main body portion 23 is positioned inside the PTT 20. An insertion port (opening) 21 a into which the terminal plug 30 can be inserted is formed in the front surface portion 21, and a setting mechanism (distribution line portion D) by a PT method, for example, is provided on the back surface portion 22 of the main body portion 23. Side) and the relay 64V1 (relay panel 12 side), and four pairs of connection terminal portions 22a for connecting the wires extending from each of the relay 64V1 (relay panel 12 side) corresponding to each phase of the distribution line portion D are arranged. ing. Here, the relay panel 12 is provided with a door (not shown) on the front side, and the terminal plug 30 and the like are inserted into the insertion port 21a of the PTT 20, and the front side of the relay panel 12 is placed. It can be covered with an open / close door and accommodated inside.

  The main body 23 of the PTT 20 is in pressure contact with each of the stationary electrodes 24 and a pair of stationary electrodes 24 that are conductively connected to each of the pair of connection terminal portions 22a corresponding to each phase of the distribution line portion D. A movable electrode (first and second connection electrodes) 25 that is urged by a spring 26 so as to be in conductive contact and is conductively connected to a connection terminal portion 22a of a back surface portion 22 to which a different stationary electrode 24 is connected. And built-in.

  When the PTT 20 is not in use, the stationary electrode 24 and the movable electrode 25 in the main body 23 are in pressure contact with each other by the elastic force of the spring 26 and are electrically connected, and the settling mechanism (distribution line portion D side) and the relay 64V1 (relay panel) 12 side) are connected to each other by a short circuit between the pair of connection terminal portions 22a connected to each other. When the terminal 20 or the like is inserted into the insertion port 21a of the PTT 20, the terminal 20 or the like enters between the stationary electrode 24 and the movable electrode 25 in the main body 23 so as to separate the direct connection. Simultaneously with the elimination, the conduction state between the settling mechanism and the relay 64V1 is maintained through a path from the movable electrode 25 via the terminal 20 via the connection terminal portion 22a. The distribution line portion D employs a three-phase four-wire system including a neutral wire. For this reason, the PPT 20 has four pairs of movable electrodes 25 and the like. The same applies hereinafter.

  As shown in FIG. 6, the terminal plug 30 includes a base member 31, a pair of insertion electrodes (first and second entry electrodes) 32, and a connection terminal portion 33. The base member 31 has a cross section formed in substantially the same shape as the opening shape so as to be able to be inserted (entered) into the insertion port 21a of the front surface portion 21 of the PTT 20, and extends in the insertion direction. The insertion (attached) state is formed so that it can be maintained. At the time of insertion, the movable electrode 25 of the main body 23 is moved away from each other to eliminate the conductive contact with the stationary electrode 24 and the settling mechanism. The state where the relay 64V1 is directly connected is cut off. The insertion electrodes 32 are disposed on both sides of the base member 31 that are in contact with the movable electrode 25 on the outer surface of the base member 31 so as to maintain insulation from each other, and the movable electrode 25 is electrically connected. It corresponds to each phase of the distribution line part D. The connection terminal portion 33 is electrically connected to each insertion electrode 32 to connect cables from various testers.

  The connection terminal portion 33 of the terminal plug 30 is disposed at one end portion 31a of the base member 31 exposed to the outside from the front surface portion 21 when inserted into the insertion port 21a of the front surface portion 21 of the PTT 20. The connection electrode 33a that is disposed on the one end 31a side of the base member 31 and is electrically connected to one of the pair of insertion electrodes 32 corresponding to each phase of the distribution line portion D, and the one end 31a of the base member 31 The connection electrode 33b, which is disposed on the side away from the connection electrode and is electrically connected to the other of the pair of insertion electrodes 32, is formed so as to maintain an insulating state.

  Thereby, the terminal plug 30 is a state in which various measuring instruments are connected and interposed between the connection electrodes 33a and 33b of the connection terminal portion 33 without causing a power failure of the distribution line portion D. When the insertion electrode 32 is inserted together with the base member 31 into the insertion port 21a, the setting mechanism and the relay 64V1 are interposed between the pair of insertion electrodes 32 and the movable electrode 25 for each phase of the distribution line portion D. Various measuring instruments can be installed on the front side of the PTT 20, and the movable electrode 25 is brought into conductive contact with the stationary electrode 24 by simply pulling it out from the insertion port 21a of the front surface portion 21 of the PTT 20, and the setting mechanism and the relay 64V1. It is possible to return to a state of direct conduction between the two.

  The relay 10 can be detachably installed on the PTT 20 with an adjustment plug 50 that realizes high-precision and easy setting instead of the terminal plug 30. The adjustment plug 50 is shown in FIG. As in the case of the terminal plug 30, the base member 31 and the insertion electrode 32 are provided, and the voltage adjustment unit 51 is connected in series between the pair of insertion electrodes 32. In the present embodiment, the voltage adjustment unit 51 is connected in series between the three sets of insertion electrodes 32 so as to correspond to the three-phase three-wire distribution line portion D excluding the neutral wire.

  As shown in FIGS. 3 and 4, the voltage adjustment unit 51 of the adjustment plug 50 includes a rough adjustment unit 52 that can roughly adjust the resistance value, and a fine adjustment unit 56 that can finely adjust the resistance value. Are connected to the insertion electrode 32 and constructed in a series circuit.

  The coarse adjustment portion 52 of the voltage adjustment portion 51 is opened at a long conductive bar 53 extending in the parallel direction of the insertion electrode 32 of the base member 31 and at equal intervals in the extending direction of the long conductive bar 53. A conductive tap pin 54 that can be inserted into the insertion hole 53 a so as to be detachable and connected to be electrically connected, and is installed so as to extend in parallel with the long conductive bar 53, and is inserted into the insertion hole 53 a of the long conductive bar 53. A selection contact 55 a that is in conductive contact with the tip of the inserted conductive tap pin 54 is constructed by a winding cable 55 for voltage transformation disposed at a plurality of locations in the extending direction, and is connected to one end side of the long conductive bar 53. The fine adjustment unit 56 is conductively connected, and the relay panel 12 (64V1) side is connected to the fine adjustment unit 56, and the distribution line part D (PT settling mechanism) side is connected to the other end of the transformer winding cable 55. Being straight Are constructed so that the circuit.

  As a result, the coarse adjustment portion 52 extends in the direction perpendicular to the insertion direction of the base member 31, in which the long conductive bar 53 and the transforming winding cable 55 extend in the width direction of the base member 31. Then, it can be installed along the exterior cover of the relay panel 12. For this reason, this rough adjustment part 52 can construct | assemble the end part 31a side of the base member 31 compactly, and is accommodated in the opening / closing door without impairing the function of the opening / closing door which covers the front side of the relay panel 12. It can be in a state to do. Therefore, the adjustment plug 50 can be easily carried without burden, can be used without separate wiring, and the open / close door of the relay panel 12 can be closed. The ability to restrict entry is not compromised.

  In addition, the coarse adjustment unit 52 inserts the conductive tap pin 54 into any one of the insertion holes 53a of the long conductive bar 53 and makes the fine adjustment unit 56 conductively connected to the selection contact 55a of the transformer winding cable 55. It is possible to determine a resistance value to which the resistance components of the two are added. That is, the coarse adjustment unit 52 can change the length of the transforming winding cable 55 interposed in the circuit according to the insertion position of the conductive tap pin 54 inserted into the insertion hole 53 a of the long conductive bar 53. The settling value (partial pressure value) that has been settled at which the relay panel 12 (64V1) side operates can be changed and adjusted.

  On the other hand, the fine adjustment unit 56 is a volume type resistor that can finely adjust the resistance value by, for example, twisting and rotating, and the coarse adjustment unit 52 is inserted into the long conductive bar 53. In contrast to the coarse adjustment of the set value (divided voltage value) in the 1V range according to the length of the winding cable 55 for transformation for each hole 53a, a type capable of adjusting the volume in the 0.1V range is adopted.

  Thereby, when it is necessary to change the setting value which relay board 12 (64V1) operates only for a short period of about 1 to 3 days by temporary system change of distribution line part D, the following setting procedures are carried out. The method can set the relay 10 with high accuracy.

  For example, before the relay 10 is changed to the system of the distribution line part D, a place where the detected voltage of the current transformer 11 operates at about 10 V is set as a set value corresponding to the change of the system. When it is necessary to set the detection voltage to a voltage dividing ratio that operates at 5 V, the insertion hole 53 a of the long conductive bar 53 is selected so that the rough adjustment unit 52 is set to a level that is roughly changed by a few volts. Then, by inserting the conductive tap pin 54, the conductive tap pin 54 is electrically connected to the selection contact 55 a of the transformer winding cable 55, and the fine adjustment unit 56 has a sub-order voltage value, for example, by rotation of a fractional unit. The volume can be adjusted with high accuracy. After this adjustment, by setting the adjustment plug 50 in the PTT 20, it is possible to set the relay panel 12 so that it can operate with high reliability in response to the system change, and the distribution section When the system change of D is completed and returned, the setting value can be reset to the original adjusted value by simply pulling out the adjustment plug 50 from the PTT 20.

  Here, as the settling procedure, considering the addition of the voltage adjustment unit 51 to the existing settling mechanism in the relay panel 12, a voltage division ratio to be changed based on the system change is calculated, and the voltage adjustment unit The resistance value by the rough adjustment unit 52 and the fine adjustment unit 53 may be adjusted.

  Specifically, first, based on the test result obtained from the ground fault characteristic test performed in advance, the transformation ratio is derived from the current set value and the set value to be changed, and the coarse adjustment unit 52 and the fine adjustment unit 52 of the voltage adjustment unit 51 are finely adjusted. After the adjustment unit 53 is temporarily set, a simulated voltage is input from the insertion electrode 32 on the primary settling mechanism (distribution line portion D) side of the adjustment plug 50 with a voltage tester or the like, and the secondary side 64V1 ( The volume resistance of the fine adjustment unit 53 is adjusted so that the calculated voltage is output from the insertion electrode 32 on the relay panel 12) side. Thereafter, the adjusted adjustment plug 50 can be inserted into the PTT 20 (attached), and the apparent set value can be adjusted with high accuracy according to the changed system. After the operation is completed, the adjustment plug 50 can be returned to the original settling value simply by pulling it out of the PTT 20.

  As described above, in this embodiment, only by setting the adjustment plug 50 to the PTT 20, the voltage adjustment unit 51 is interposed between the setting mechanism of the relay panel 12 and 64V1, and the settling value after the system change is changed. The set value can be adjusted with high accuracy, and it is not necessary to adjust the set value of the relay panel 12 itself every time the system is changed. When returning the system, the set value can be restored simply by pulling out the adjustment plug 50. Can be made. Therefore, the settling and adjustment can be performed with high accuracy regardless of the system change, and the distribution line portion D can be reliably protected from a ground fault or the like.

  Further, the adjustment plug 50 can be set by diverting the existing PTT 20 to the relay 10 and can be used without requiring a design change or the like. Moreover, since this adjustment plug 50 is provided with the voltage adjustment part 51 provided with the rough adjustment part 52 and the fine adjustment part 53 for every phase of the distribution line part D, it can be set and adjusted accurately for each phase. it can.

  As a first other aspect of the present embodiment, although illustration is omitted, resistance value adjustment of the voltage adjustment unit 51 is not performed individually for each phase of the distribution line unit D, but a single pin difference. Setting operation and volume adjustment may be used, and settling adjustment can be completed quickly when individual adjustment is unnecessary.

  In this embodiment, the case where the existing PTT 20 is diverted will be described as an example. However, the adjustment plug 50 is not set if necessary, but the voltage adjustment unit 51 is detachably incorporated in the wiring and permanently installed. Alternatively, a dedicated attachment / detachment device for the adjustment plug 50 may be installed.

  The scope of the present invention is not limited to the illustrated and described exemplary embodiments, but includes all embodiments that provide the same effects as those intended by the present invention. Further, the scope of the invention is not limited to the combinations of features of the invention defined by the claims, but may be defined by any desired combination of particular features among all the disclosed features. .

  Although one embodiment of the present invention has been described so far, it is needless to say that the present invention is not limited to the above-described embodiment, and may be implemented in various forms within the scope of the technical idea.

DESCRIPTION OF SYMBOLS 10 Relay 12 Relay board 20 Terminal 21a Insert 23 Main part 24 Non-movable electrode 25 Movable electrode 26 Spring 30 Terminal plug 31 Base member 31a One end 32 Insert electrode 33 Connection terminal part 50 Adjustment plug 51 Voltage adjustment part 52 Coarse adjustment part 53 Long Conductive Bar 53a Insertion Hole 54 Conductive Tap Pin 55 Winding Cable 55a for Transformer Selection Contact 56 Fine Adjustment Part D Distribution Line

Claims (7)

A pair of relays that protect the distribution line by detecting a ground fault in the distribution line and operating the relay panel to maintain the connection state in the middle of the wiring between the distribution line side and the relay panel side of the relay A base member that enters between the first and second connection electrodes and blocks the connection state;
A first entry electrode provided on the base member so as to be in conductive contact with the first connection electrode on the distribution line side when the base member enters between the first and second connection electrodes;
A second entry electrode provided on the base member so as to be in conductive contact with the second connection electrode on the relay panel side when the base member is caused to enter between the first and second connection electrodes;
A voltage adjusting unit for adjusting a partial pressure generated between the first and second approach electrodes and the relay panel side by being connected in series with the relay panel side;
Having
The voltage adjustment unit includes a coarse adjustment unit that roughly adjusts a resistance value between the first and second approach electrodes, and a fine adjustment unit that finely adjusts a resistance value between the first and second approach electrodes. Equipped,
The relay test terminal adjustment device, wherein the first and second approach electrodes and the voltage adjustment unit are provided for each phase of the distribution line.   The base member is formed in a shape that can be attached to and detached from a test terminal prepared in the relay and can be stably maintained in the mounting state when mounted, and enters between the first and second connection electrodes during the mounting. 2. The relay test terminal according to claim 1, wherein the voltage adjustment unit is disposed at one end exposed from the test terminal. Adjustment device.   The relay test terminal adjustment device according to claim 1, wherein the voltage adjustment unit is configured to adjust individually or in common for each phase of the distribution line. The base member is formed in a form to be inserted into an opening formed in the exterior cover of the relay,
4. The relay test terminal according to claim 1 , wherein the voltage adjusting unit is formed in a circuit so as to extend in a direction orthogonal to the insertion direction of the base member. 5. Adjustment device. A relay that protects the distribution line by detecting a ground fault in the distribution line and operating the relay panel,
A pair of first and second connection electrodes that maintain a connection state that is in the middle of wiring between the distribution line side and the relay panel side and that are in conductive contact and that can be separated and changed to a cut-off state,
A relay comprising the test terminal adjustment device according to any one of claims 1 to 4 in a detachable manner. The test terminal opened in the exterior cover of the relay which protects the said distribution line by detecting the ground fault accident in a distribution line and operating the relay panel, The said any one of Claim 1 to 4 A method for setting a relay, comprising: adjusting the test terminal, and adjusting a partial pressure generated between the first and second connection electrodes and the relay panel side in the voltage adjusting unit. Claim 6, wherein to obtain the partial pressure ratio between the relay board side in response to changes in the power distribution line side and the voltage adjusting unit, and adjusting the voltage adjusting unit based on the ratio the amount The setting method of the relay described in 2.

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