JP6606959B2 - Plug check device - Google Patents

Description

  The present invention relates to a plug check device, and more particularly, to a plug check device that can easily check a voltage plug or a current plug inserted into a test plug terminal disposed on a panel to be operated such as a protective relay.

  The protective relays installed at substations may be inspected. For example, when working with a protective relay panel in which a protective relay is incorporated, as shown in FIG. 11, a four-pole voltage plug P1 and a four-pole current plug are connected to a test plug terminal mounted on the protective relay board. P2 is inserted so that there is no external input (see Patent Document 1).

That is, for the instrument transformer PT, as shown in FIG. 12, a voltage plug P1 having eight terminals with all terminals open is used. Further, as shown in FIG. 13, a current plug P2 having eight terminals with the instrument current transformer CT short-circuited is used for the instrument current transformer CT. In FIG. 12 and FIG. 13, terminals for three-phase AC R-phase, S-phase, T-phase, N-phase (grounding), etc. are represented by encircled numbers as shown below.
R phase: Circled number 1, Circled number 5
S phase: Circled number 2, Circled number 6
Phase T: Circled number 3, Circled number 7
N phase: Circled number 4, Circled number 8
The same applies to the following figures.

JP 2011-149887 A

  In order to work on the protective relay panel, it is checked beforehand that there is no short circuit between the terminals by the tester for the voltage plug P1. At this time, since the operator performs 16 circuit checks for each plug while holding each plug, if the number of plugs to be checked is 10 to 20, the labor and time required for the check increase. Further, the current plug P2 is insulated from the inside and outside of the switchboard, and it is checked by using a tester or a megger that there is no short circuit between the phases.

  The present invention has been made in view of such a conventional situation, and it is possible to easily check a voltage plug or a current plug inserted into a test plug terminal disposed on a work board such as a protective relay. An object is to provide a plug check device.

In order to solve the above-mentioned problems, the invention of claim 1 is a plug check device for checking a voltage plug and a current plug for a test plug terminal mounted on a panel to be worked, wherein the voltage plug is attached and detached. A first plug housing portion provided with terminals that come into contact with the terminals of the inserted voltage plug, and the terminals of the current plug into which the current plug is removably inserted. A second plug housing portion provided with a terminal in contact with each other, a measurement portion for checking electrical continuity of a measurement object connected between the measurement terminals, and each terminal of the first plug housing portion One of the terminals can be selected, and the selected terminal is connected to one measurement terminal of the measurement unit, and the remaining terminals of the first plug storage unit are in electrical contact with each other. The first changeover switch part for connecting all the terminals to the other measurement terminal of the measurement part, and the terminals of the second plug housing part, which are in contact with the short-circuit side of the current plug One of the terminals can be selected, and the selected terminal is connected to one measurement terminal of the measurement unit, and each terminal of the second plug storage unit has a short-circuit side of the current plug A second changeover switch unit that connects all of these terminals to the other measurement terminal of the measurement unit in a state where the remaining terminals of the terminals that are in contact with each other are electrically in contact with each other through a resistor; The first changeover switch part and the second changeover switch part are selectable, and the changeover part connects the selected changeover switch part to the tester part.

The invention of claim 2 is the plug checking device according to claim 1, wherein the measuring unit is characterized in that it is one of the tester unit or megger unit.

According to the first aspect of the present invention, when checking the voltage plug, the first changeover switch unit selects one of the terminals of the first plug housing unit, and the selected terminal is connected to the measurement unit. While connecting to one measurement terminal and in contact with the remaining terminals of the first plug housing part, all these terminals are connected to the other measurement terminal of the measurement part. For example, in the case of a four-pole voltage plug, the open state between all terminals can be confirmed by performing the switch operation eight times in the first changeover switch unit, greatly increasing the check time. It is possible to shorten it.

  Further, when checking the current plug, the second selector switch unit selects one of the terminals of the second plug housing unit that is in contact with the short-circuit side of the current plug, The selected terminal is connected to one measurement terminal of the measurement unit, and the other terminals of the second plug storage unit that are in contact with the short-circuit side of the current plug are connected with a resistor. In this state, all these terminals can be connected to the other measurement terminal of the measurement unit to check the current plug. For example, in the case of a four-pole current plug, the second plug By performing the switch operation once in the changeover switch section, it can be confirmed that the circuit is not opened, and the check time can be greatly shortened.

  In addition, since the voltage plug is inserted into the first plug housing portion and the current plug is inserted into the second plug housing portion, the check is performed, so that the reliability of the check can be improved. Furthermore, since the basic apparatus configuration includes two plug storage units, two changeover switch units, a switching unit, and a measurement unit, the test apparatus can be manufactured at low cost.

According to invention of Claim 2 , the safety | security at the time of megger use can be improved greatly.

It is a block diagram of the plug check apparatus which concerns on Embodiment 1 of this invention. It is explanatory drawing of the plug accommodating part for PTT 10, and the rotary switch part 20 for PTT. 4 is an explanatory diagram illustrating a connection relationship of a switching unit 50. FIG. It is explanatory drawing explaining the structure of the rotary switch part 20 for PTT. It is explanatory drawing which shows the connection relation of the plug accommodating part 10 for PTT, and demonstrates the check method of the voltage plug P1. It is explanatory drawing of the plug accommodating part 30 for CTT, and the rotary switch part 40 for CTT. It is explanatory drawing explaining the structure of the rotary switch part for CTT. It is explanatory drawing which shows the connection relation of the plug accommodating part 30 for CTT, and demonstrates the check method of the current plug P2. It is explanatory drawing (the 1) explaining the connection relation of the plug accommodating part 30 for CTT. It is explanatory drawing (the 2) explaining the connection relation of the plug storage part 30 for CTT. It is explanatory drawing explaining the inspection work of a protective relay. It is explanatory drawing of 4 pole voltage plug P1. It is explanatory drawing of 4 pole electric current plug P2.

  The present invention will be described below based on the illustrated embodiments.

[Embodiment 1]
FIG. 1 shows a configuration diagram of a plug check device 1 according to Embodiment 1 of the present invention. The check device 1 includes a PTT plug storage unit 10, a PTT rotary switch unit 20, a CTT plug storage unit 30, a CTT rotary switch unit 40, a switching unit 50, and a tester unit 60. . The check device 1 includes a four-pole voltage plug P1 (see FIG. 11) having eight terminals for a test plug terminal mounted on the protective relay panel and a four-pole current plug P2 (see FIG. 12) having eight terminals. For reference).

  The PTT plug accommodating portion 10 is a portion into which the voltage plug P1 is inserted in order to check the voltage plug P1, that is, the receiving side of the voltage plug P1. The voltage plug P1 is detachably attached to the PTT plug storage unit 10. As shown in FIG. 2, the PTT plug storage unit 10 includes terminals 11 to 18 that contact each phase of the voltage plug P <b> 1. For example, the terminals 11 and 15 of the PTT plug housing 10 are for the R phase, and the terminals 12 and 16 are for the S phase. Further, the terminals 13 and 17 of the PTT plug housing 10 are for the T phase, and the terminals 14 and 18 are for the N phase.

  The tester unit 60 is used for measuring a conduction state and a resistance value using a resistance range. For this purpose, the tester unit 60 includes a plus side terminal 61A and a minus side terminal 61B as two measurement terminals for measurement. The tester unit 60 includes a meter 62 that represents a measurement result and a switch 63 for switching the measurement range, and is used by being fixed to the resistance range.

The switching unit 50 is a switching switch that switches whether the tester unit 60 is connected to the PTT rotary switch unit 20 or the CTT rotary switch unit 40. Specifically, as shown in FIG. 3, the switching unit 50 includes contacts 51 </ b> A _{1 to} 51 </ b> A ₃ , contacts 51 </ b> B _{1 to} 51 </ b> B _3, and a switching tool 52. When the switching device 52 is moved in the arrow direction, the contact 51A ₁ is connected to the contact 51A ₂ or contact 51A _3, at the same time, the contact 51B ₁ is connected to the contact 51B ₂ or contact 51B _3. Thereby, whether the plus side terminal 61A and the minus side terminal 61B of the tester unit 60 are connected to the PTT rotary switch unit 20 or the CTT rotary switch unit 40 is switched. In FIG. 2, the switching unit 50 shows the state in which the tester unit 60 is connected to the PTT rotary switch unit 20, and the switching unit 50 is not shown. Further, the switching unit 50 may connect the tester unit 60 or a megar (not shown) to the PTT rotary switch unit 20 or the CTT rotary switch unit 40.

  The PTT rotary switch unit 20 switches connection to the terminals 11 to 18 of the PTT plug storage unit 10. For this purpose, the PTT rotary switch section 20 basically includes a rotary switch 21 having the configuration shown in FIG.

The rotary switch 21 includes a rod-shaped rotating shaft 21A, and circular rotating bodies 21B, 21D, 21E, and 21G are fixed to the rotating shaft 21A. A knob 21B is attached to one end of the rotating shaft 21A. The knob 21B is a part operated by an operator, and has a structure that rotates stepwise by 45 degrees. A disc-shaped first rotating body 21C is attached to the rotating shaft 21A with the knob 21B interposed therebetween. An annular first rotating conductor portion 21D is attached around the first rotating body 21C. First rotating conductor portion 21D is made of a conductive material, the fixed contact 21D ₁ is provided in contact at all times with the first rotating conductor portion 21D. Even if the first rotating conductor portion 21D by stepwise rotation of the knob 21B is rotated, the fixed contact 21D ₁ is always in contact first rotating conductor portion 21D. These fixed contact 21D ₁ is connected to a positive terminal 61A of the tester unit 60.

A disc-shaped second rotating body 21E is attached to the rotating shaft 21A with a space from the first rotating body 21C. An annular second rotating conductor portion 21F is attached around the second rotating body 21E. Second rotation conductor portion 21F is made of a conductive material, the fixed contact 21F ₁ is provided in contact at all times with the second rotating conductor portion 21F. The second rotary conductor portion 21F by stepwise rotation of the knob 21B is rotated, the fixed contact 21F ₁ is always in contact with the second rotating conductor portion 21F. These fixed contact 21F ₁ is connected to the negative terminal 61B of the tester 60.

A third rotating body 21G is attached to the lower part of the second rotating body 21E. In this rotating body 21G, movable contacts 21G _{1 to} 21G ₈ are circularly arranged at intervals of 45 degrees. The movable contacts 21G _{1 to} 21G ₈ rotate 45 degrees around the rotation shaft 21A by the stepwise rotation of the knob 21B. That is, the movable contact 21G ₁ is fixed to the first rotating conductor portion 21D of the ring by internal wiring. The movable contacts 21G _{2 to} 21G ₈ are connected at one point, and the connection point J1 is connected to the second rotating conductor portion 21F by internal wiring. Furthermore, at each position where the knob 21B stops, eight fixed contacts are disposed so as to be in electrical contact with the movable contacts 21G _{1 to} 21G ₈ . The positions of the eight fixed contacts are indicated by encircled numerals 1-8. The eight fixed contacts are connected to the terminals 11 to 18 of the PTT plug storage unit 10, respectively. Then, in the initial position of the knob 21B, in contact with the fixed contact the movable contact 21G ₁ is at the position of the circled numbers 1, contact with the fixed contact the movable contact _21G 2 _{~21G 8} is in the position of the circled numbers 2-8 doing. That is, in the initial position, the movable contact 21G ₁ is connected to the positive terminal 61A of the tester unit 60.

As shown in FIG. 4 in particular, the movable contact 21G ₁ of the rotary switch 21 is connected to the first rotating conductor portion 21D by the internal wiring _{21G 11.} Accordingly, the movable contact 21G ₁ is electrically connected to the first rotating conductor portion 21D, and rotates with the first rotating conductor portion 21D. The movable contacts 21G _{2 to} 21G ₈ are connected to the second rotating conductor portion 21F by internal wirings 21G _{21 to} 21G ₈₁ . Accordingly, the movable contacts 21G _{2 to} 21G ₈ are electrically connected to the second rotating conductor portion 21F and rotate together with the second rotating conductor portion 21F.

The movable contact _21G 1 _{~21G 8} of the rotary switch 21, the fixed contact _21G 12 _{~21G 82} to electrically contact is disposed.

In such a structure of the rotary switch 21, as shown in previous FIG. 2, the movable contact 21G ₁ are in electrical contact with the fixed contact 21G ₁₂ is the initial position of the knob 21B. At this time, the movable contacts 21G _{2 to} 21G ₈ are in electrical contact with the fixed contacts 21G _{22 to} 21G ₈₂ , respectively. Knob 21B from the initial position is 45 degrees, when rotated clockwise, the movable contact 21G ₁ is electrical contact with the fixed contact _{21G 22} adjacent, movable contact _21G 2 _{~21G 8} stationary contacts _21G 32 _{~21G 82} , _{21G 12} and electrical contact.

  When such a rotary switch 21 checks the voltage plug P1 inserted into the PTT plug storage unit 10, the rotary switch 21 checks from the terminals 11 to 18 of the PTT plug storage unit 10 into which the voltage plug P1 is inserted. The terminals connected to the plus side terminal 61A of the tester unit 60 are sequentially selected. This selection is performed by rotating the knob 21B by 45 degrees. Furthermore, at the initial position of the knob 21B, the terminal 11 is selected from the terminals 11 to 18 of the PTT plug storage unit 10. In other words, in the initial position, the terminal 11 of the PTT plug storage unit 10 is connected to the plus side terminal 61 </ b> A of the tester unit 60. The above is the structure of the rotary switch unit 20 for PTT.

  Next, a method for checking the voltage plug P1 by the plug check device 1 will be described. The configurations of the CTT plug storage unit 30 and the CTT rotary switch unit 40 will be described later.

  The operator checks the 4-pole voltage plug P1 in order to check the protective relay panel. In order to check the voltage plug P1, the operator inserts the voltage plug P1 into the PTT plug housing 10 of the plug check device 1. Thereafter, the operator operates the switching unit 50 to connect the tester unit 60 to the PTT rotary switch unit 20. Further, the operator sets the knob 21B of the PTT rotary switch unit 20 to the initial position.

As a result, as shown in FIG. 5, the terminal 11 of the PTT plug storage unit 10 is connected to the plus side terminal 61 </ b> A of the tester unit 60 through the movable contact 21 </ b> G ₁ and the fixed contact 21 </ b> G ₁₂ . That is, at the initial position of the knob 21B, the terminal 11 of the PTT plug housing 10 for the voltage plug P1 is a reference terminal. Further, the terminals 12 to 18 of the PTT plug storage unit 10 are connected to the minus side terminal 61B of the tester unit 60 through the movable contacts 21G _{2 to} 21G ₈ and the fixed contacts 21G _{22 to} 21G ₈₂ , respectively. . At this time, all of the terminals 12 to 18 are electrically connected to the minus side terminal 61B of the tester unit 60.

In this state, since the tester unit 60 is in the resistance measurement mode,
Between reference terminal 11 and terminal 12 Between reference terminal 11 and terminal 13 Between reference terminal 11 and terminal 14 Between reference terminal 11 and terminal 15 Between reference terminal 11 and terminal 16 Between the reference terminal 11 and the terminal 17 The resistance between the reference terminal 11 and the terminal 18 is measured at a time.

Although not shown, if the knob 21B is rotated 45 degrees clockwise in the same manner, the terminal serving as the reference is changed from the terminal 11 to the terminal 12. In this state, the tester unit 60
Between the reference terminal 12 and the terminal 13 Between the reference terminal 12 and the terminal 14 Between the reference terminal 12 and the terminal 15 Between the reference terminal 12 and the terminal 16 The reference terminal 12 and Between the terminal 17 Between the reference terminal 12 and the terminal 18 The resistance between the reference terminal 12 and the terminal 11 is measured at a time.

  As described above, when the knob 21B of the PTT rotary switch unit 20 is rotated by 45 degrees, that is, at the eight positions of the knob 21B, the reference terminal to which the plus side terminal 61A of the tester unit 60 is connected is the terminal. 11 to terminal 18 in order. Thereby, it is possible to check whether or not the terminals are normally opened by measuring all the resistances of the voltage plug while shifting the reference by eight operations of the knob 21B. The method for checking the voltage plug P1 using the plug check device 1 has been described above.

  Next, the CTT plug storage unit 30 and the CTT rotary switch unit 40 will be described. The difference in the structure of the rotary switch for PTT and CTT is that only the open check is performed for PTT, but for CTT, the circled numbers 1 to 4 on the current plug P2 side are short-circuited, and the circled numbers Since the circled number 8 is in an open state, the measuring circuit divides the circled number 1 to the circled number 4 on the short circuit side and the circled number 5 to the circled number 8 on the open side into two parts, respectively, and the measuring method Consists of different circuits.

  The CTT plug accommodating portion 30 is a portion into which the current plug P2 is inserted in order to check the current plug P2, that is, the receiving side of the current plug P2. The current plug P2 is detachably attached to the CTT plug storage unit 30. As shown in FIG. 6, the CTT plug storage unit 30 includes terminals 31 to 38 that contact each phase of the current plug P <b> 2. For example, the terminals 31 and 35 of the CTT plug storage unit 30 are for the R phase, and the terminals 32 and 36 are for the S phase. Further, the terminals 33 and 37 of the CTT plug storage unit 30 are for the T phase, and the terminals 34 and 38 are for the N phase.

  The CTT rotary switch unit 40 switches connection to the terminals 31 to 38 of the CTT plug storage unit 30. For this purpose, the CTT rotary switch section 40 includes a rotary switch 41.

The rotary switch 41 includes a rod-shaped rotating shaft 41A. Circular rotating bodies 41B, 41C, 41E, 41G, and 41H are fixed to the rotating shaft 41A. A knob 41B is attached to one end of the rotating shaft 41A. The knob 41B is a part that is operated by an operator, and has a structure that rotates stepwise by 45 degrees (eight steps). A disc-shaped first rotating body 41C is attached to the rotating shaft 41A with a gap from the knob 41B. An annular first rotating conductor portion 41D is attached around the first rotating body 41C. First rotating conductor portion 41D is made of a conductive material, the fixed contact 41D ₁ is always in contact with the first rotating conductor portion 41D. That is, by rotating the first rotating conductor portion 41D by stepwise rotation of the knob 21B, the fixed contact 41D ₁ is always in contact with the first rotating conductor portion 41D. These fixed contact 41D ₁ is connected to a positive terminal 61A of the tester unit 60.

A disc-shaped second rotating body 41E is attached to the rotating shaft 41A at a distance from the first rotating body 41C. An annular second rotating conductor portion 41F is attached around the second rotating body 41E. Second rotation conductor portion 41F is made of a conductive material, the fixed contact 41F ₁ is provided on the second rotating conductor portion 41F. That is, even rotates the second rotating conductor portion 41F by stepwise rotation of the knob 41B, the fixed contact 41F ₁ is always in contact with the second rotating conductor portion 41F. These fixed contact 41F ₁ is connected to the negative terminal 61B of the tester 60.

A third rotating body 41G and a fourth rotating body 41H are attached to the lower part of the second rotating body 41E. The rotating body 41G and the rotating body 41H divide the measuring circuit of the current plug P2 into two, and the rotating body 41G constitutes a measuring circuit for short circuit and the rotating body 41H constitutes a measuring circuit for opening. In the rotating body 41G, the movable contacts 41G _{1 to} 41G ₄ are arranged in a circle at an angle of 90 degrees. The movable contacts 41G _{1 to} 41G ₄ rotate 45 degrees around the rotation shaft 41A by the stepwise rotation of the knob 41B. Further, the movable contacts 41G _{2 to} 41G ₄ are connected at a single point with resistors 41R _{1 to} 41R ₃ interposed therebetween, and the connection point J11 is connected to the second rotating conductor portion 41F.

In addition, four fixed contacts are arranged at a position where the knob 41B stops every 90 degrees. The positions of the four fixed contacts are indicated by encircled numerals 1 to 4. The four fixed contacts are connected to the terminals 31 to 34 of the CTT plug storage unit 30, respectively. Then, in the initial position of the knob 41B, in contact with the fixed contact the movable contact 41G ₁ is at the position of the circled numbers 1. That is, in the initial position, the movable contact 41G ₁ is connected to the positive terminal 61A of the tester unit 60. In the initial position, the movable contacts 41G _{2 to} 41G ₄ are in contact with the fixed contacts located at the positions of the encircled numerals 2 to 4.

Then, if further 45 degree rotation of the knob 41B (2-stage position), the circuit of the rotary member 41G is moved to place the movable contact _41G 1 _{~41G 4} no fixed contacts, circuit not configured.

  As described above, the short circuit and the open circuit are alternately measured by the operation of the knob 41B, and the circuit is cycled by the operation of 8 points (1 to 8 stages).

Next, description will be back and forth, rotating member 41H constitutes a circuit for measuring the opening of the current plug, the movable contact of the rotating body 41H is shifted respectively from the movable contact _41G 1 _{~41G 4} is 45 degrees of the rotating body 41G Arranged and turning the knob 41B by 45 degrees, the circuit of the rotator 41G and the rotator 41H is configured alternately.

Around the rotating body 41H, the movable contacts 41H _{1 to} 41H ₄ are arranged in a circle at an angle of 90 degrees. The movable contacts 41H _{1 to} 41H ₄ are arranged so as to face the movable contacts 41G _{1 to} 41G ₄ . The movable contacts 41H _{1 to} 41H ₄ and the working contacts 41G _{1 to} 41G ₄ rotate 45 degrees around the rotation shaft 41A by the stepwise rotation of the knob 41B. Further, fixed contacts at positions indicated by circled numbers 1 to 4 are arranged at intervals of 90 degrees around the rotating body 41G, and circled numbers 5 to 8 are arranged around the rotating body 41H. The fixed contacts at the positions indicated by are arranged at intervals of 90 degrees. The fixed contacts of the circled numbers 1 to 4 and the fixed contacts of the circled numbers 5 to 8 are arranged at positions shifted by 45 degrees. The fixed contacts connected to the rotating body 41G and the rotating body 41H are displaced by 45 degrees, so that the circuit of the rotating body 41G and the rotating body 41H is alternately formed every time the knob 41B is rotated 45 degrees. Four fixed contacts are arranged at a position where the knob 41B stops. The positions of the four fixed contacts are indicated by encircled numerals 5-8. The four fixed contacts are connected to the terminals 35 to 38 of the CTT plug storage unit 30, respectively.

Then, Again, the initial position of the knob 41B, in contact with the fixed contact the movable contact 41G ₁ is at the position of the circled numbers 1, and the movable contact _41G 2 _{~41G 4} of circled numbers 2-4 In contact with the fixed contact in position. Further, at the initial position of the knob 41B, the movable contacts 41H _{1 to} 41H ₄ are not in contact with the fixed contacts at the positions of the encircled numbers 5 to 8. That is, at the initial position of the knob 41B, the movable contacts 41H _{1 to} 41H ₄ are not connected.

As shown in FIG. 7 in particular, the movable contact 41G ₁ of the rotary switch 41 is connected to the first rotating conductor portion 41D by the internal wiring _{41G 11.} Accordingly, the movable contact 41G ₁ is electrically connected to the first rotating conductor portion 41D, and rotates with the first rotating conductor portion 41D. The movable contacts 41G _{2 to} 41G ₄ are connected to the second rotating conductor portion 41F by internal wirings 41G _{21 to} 41G ₄₁ with resistors 41R _{1 to} 41R ₃ interposed.

Fixed contacts 41G _{12 to} 41G ₄₂ that are in electrical contact are arranged on the movable contacts 41G _{1 to} 41G ₄ of the rotary switch 41. The fixed contact points 41G _{12 to} 41G ₄₂ are fixed in arrangement positions and do not rotate with the stepwise rotation of the knob 41B. Furthermore, the fixed contacts 41G _{12 to} 41G ₄₂ are respectively connected to the terminals 31 to 34 of the CTT plug storage unit 30.

Movable contacts 41H _{1 to} 41H ₄ are arranged around the rotating shaft 41A with the movable contacts 41G _{1 to} 41G ₄ of the rotary switch 41 therebetween. At this time, the movable contacts 41H _{1 to} 41H ₄ are arranged to be shifted by 45 degrees with respect to the movable contacts 41G _{1 to} 41G ₄ . Movable contact 41H ₁ is fixed to the first rotating conductor portion 41D by the internal wiring _{41H 11.} Accordingly, the movable contact 41H ₁ is electrically connected to the first rotating conductor portion 41D, and rotates with the first rotating conductor portion 41D. The movable contacts 41H _{2 to} 41H ₄ are fixed to the annular second rotating conductor portion 41F by rod-like connectors 41H _{21 to} 41H ₄₁ . Thereby, the movable contacts 41H _{2 to} 41H ₄ rotate 45 degrees together with the second rotating conductor portion 41F.

The movable contacts 41H _{1 to} 41H ₄ of the rotary switch 41 are arranged with fixed contacts 41H _{12 to} 41H _{42 at} an angle of 90 degrees so as to be in electrical contact. The fixed contacts 41H _{12 to} 41H ₄₂ are fixed in arrangement positions and do not rotate with the stepwise rotation of the knob 21B. The fixed contacts _41H 12 _{~41H 42} is disposed at an angle of 90 degrees at the same position to face the stationary contact _41G 12 _{~41G 42.} Further, the fixed contacts 41H _{12 to} 41H ₄₂ are connected to the terminals 35 to 38 of the CTT plug storage unit 30, respectively.

In the rotary switch 41 having such a structure, as shown in FIG. 6, the movable contact 41G ₁ is in electrical contact with the fixed contact 41G ₁₂ (FIG. 7), and the movable contact 41H ₁ is not connected to the fixed contact. A certain state is the initial position of the knob 41B. At this time, the movable contacts 41G _{2 to} 41G ₄ are in electrical contact with the fixed contacts 41G _{22 to} 41G ₄₂ (FIG. 7), and the movable contacts 41H _{2 to} 41H ₄ are not connected to the fixed contacts. Knob 41B is 45 degrees from the initial state, when it is rotated clockwise, the state of the movable contact 41G ₁ is unconnected to the fixed contact and fixed contact _{41H 12} movable contact 41H ₁ is adjacent to (Fig. 7) Make electrical contact. The movable contacts 41G _{2 to} 41G ₄ are not connected to the fixed contacts, and the movable contacts 41H _{2 to} 41H ₄ are in electrical contact with the fixed contacts 41H _{22 to} 41G ₄₂ (FIG. 7).

  When such a rotary switch 41 checks the current plug P2 inserted into the CTT plug storage unit 30, the terminals 31 to 34 and the terminals 35 to 38 of the CTT plug storage unit 30 into which the current plug P2 is inserted. The terminal to be used as a reference for the check, that is, the terminal connected to the plus-side terminal 61A of the tester unit 60 is sequentially selected. This selection is performed by rotating the knob 41B by 45 degrees. Further, the terminal 31 is selected from the terminals 31 to 34 at the initial position of the knob 41B. The above is the structure of the CTT rotary switch section 40.

  Next, a method for checking the current plug P2 by the plug check device 1 will be described. The operator checks the four-pole current plug P2 in order to check the protective relay panel. In order to check the current plug P2, the operator inserts the current plug P2 into the CTT plug housing 30 of the plug check device 1. Thereafter, the operator operates the switching unit 50 to connect the tester unit 60 to the CTT rotary switch unit 40 and set the measurement mode of the tester unit 60 to resistance measurement. Further, the operator sets the knob 41B of the CTT rotary switch 40 to the initial position.

Thus, positive terminal 61A of the tester 60, because it is always in contact with the first rotating conductor portion 41D of the rotary switch 41 is connected to the movable contact 41G _1. Since the fixed contact _{41G 12} contacts the movable contact 41G _1, the movable contact 41G ₁ is connected to the terminal 31 of the CTT plug accommodating portion 30. That is, as shown in FIG. 8, the plus side terminal 61 </ b> A of the tester unit 60 is electrically connected to the terminal 31 of the CTT plug storage unit 30.

Since the minus side terminal 61B of the tester unit 60 is always in contact with the second rotating conductor portion 41F of the rotary switch 41, it is connected to the resistors 41R _{1 to} 41R ₃ via the connection point J11. The resistors 41R _{1 to} 41R ₃ are connected to the movable contacts 41G _{2 to} 41G ₄ . Since the movable contacts 41G _{2 to} 41G ₄ are in contact with the fixed contacts 41G _{22 to} 41G ₄₂ , the movable contacts 41G _{2 to} 41G ₄ are electrically connected to the terminals 32 to 34 of the CTT plug storage unit 30. That is, as shown in FIG. 8, the minus side terminal 61B of the tester unit 60 is electrically connected to the terminals 32 to 34 of the CTT plug storage unit 30 via the resistors 41R _{1 to} 41R ₃ . The terminal 31 of the CTT plug storage unit 30 to which the plus side terminal 61A of the tester unit 60 is connected serves as a measurement reference.

As shown in FIG. 9, the CTT plug storage unit 30 uses the current plug P <b> 2 inserted into the CTT plug storage unit 30 as shown in FIG. 9.
Between terminal 31 and terminal 32 Between terminal 32 and terminal 33 Between terminal 33 and terminal 34 is short-circuited.

Thus, the flow path of current flowing through the resistor _41R 1 _{~41R 3} by the tester unit 60 is formed as follows.
a. The positive terminal 61A of the tester unit 60 → the terminal 31 of the CTT plug storage unit 30 → the current plug P2 → the terminal 32 of the CTT plug storage unit 30 → the resistor 41R ₁ → the negative terminal 61B of the tester unit 60
b. Positive side terminal 61A of tester section 60 → terminal 31 of CTT plug storage section 30 → current plug P2 → terminal 33 of CTT plug storage section 30 → resistance 41R ₂ → negative side terminal 61B of tester section 60
c. The positive side terminal 61A of the tester unit 60 → the terminal 31 of the CTT plug storage unit 30 → the current plug P2 → the terminal 34 of the CTT plug storage unit 30 → the resistance 41R ₃ → the negative side terminal 61B of the tester unit 60

That is, the resistance 41R ₁ connected to the terminal 32, via the terminal 32 and the terminal 31 is connected to the positive terminal 61A of the tester unit 60. The resistance 41R ₂ which is connected to the terminal 33 through the terminal 33 and the terminal 32 and the terminal 31 is connected to the positive terminal 61A of the tester unit 60. Furthermore, the resistance 41R ₃ connected to the terminal 34 through the terminal 34 and the terminal 33 and the terminal 32 and the terminal 31 is connected to the positive terminal 61A of the tester unit 60.

になる。 As a result, the resistors 41R _{1 to} 41R ₃ are connected in parallel. For example, assuming that the resistance values of the resistors 41R _{1 to} 41R ₃ are values R _{1 to} R ₃ , a parallel resistance that is a combined resistance between the plus side terminal 61A and the minus side terminal 61B of the tester unit 60 by the resistors 41R _{1 to} 41R _3. The resistance value R ₀ is

become.

Here, as shown in FIG. 10, when the connection between, for example, the circled numeral 2 and the circled numeral 3 of the current plug P2 is opened as indicated by a cross in the figure, In the plug storage unit 30,
The space between the terminal 32 and the terminal 33 is opened. As a result, the resistance 41R ₂ which is connected to the terminal 33, so go through the terminal 33 and the terminal 32 and the terminal 31, with respect to the positive terminal 61A of the tester 60, it is no longer connected. Furthermore, the resistance 41R ₃ connected to the terminal 34, so go through the terminal 34 and the terminal 33 and the terminal 32 and the terminal 31, will not be connected to the positive terminal 61A of the tester unit 60.

となる。つまり、テスター部６０が計測する並列抵抗は、電流プラグＰ２が正常に短絡されている場合と、開放がある場合とでは異なる値となるので、この並列抵抗の値の変化で異常のある電流プラグＰ２を容易に見つけ出すことができる。 As a result, the value R ₀ of the parallel resistance is

It becomes. That is, the parallel resistance measured by the tester unit 60 has a different value between when the current plug P2 is normally short-circuited and when the current plug P2 is open. P2 can be easily found.

By the way, when the plug check device is checking for a short circuit of the current plug P2, the movable contacts 41H _{1 to} 41H ₄ of the rotary switch 41 (FIG. 6) are not connected and are not involved in checking the current plug P2. .

Next, the operator sets the knob 41B of the CTT rotary switch 40 to a position rotated 45 degrees from the initial position. As a result, the movable contacts 41G _{1 to} 41G ₄ rotated 45 degrees from the initial position are not connected and are not involved in checking the current plug P2.

On the other hand, the movable contacts 41H _{1 to} 41H ₄ rotated by 45 degrees from the initial position come into contact with the fixed contacts 41H _{12 to} 41H ₄₂ . The fixed contacts 41H _{12 to} 41H ₄₂ are connected to the terminals 35 to 38 of the CTT plug storage unit 30, respectively. As a result, the plus side terminal 61A of the tester unit 60 is connected to the terminal 35 of the CTT plug storage unit 30 via the fixed contact 41D ₁ , the first rotating conductor unit 41D, and the movable contact 41H ₁ . This terminal 35 becomes a reference for measurement. Further, the negative terminal 61B of the tester unit 60 is connected to the terminals 36 to 38 of the CTT plug storage unit 30 via the fixed contact 41F ₁ , the second rotating conductor unit 41F, and the connection point J12. In the CTT plug storage unit 30,
Between reference terminal 35 and terminal 36 Between reference terminal 35 and terminal 37 Opening between reference terminal 35 and terminal 38 is measured at a time.

Thereafter, the operator sets the knob 41B to a position further rotated by 45 degrees. Accordingly, the movable contacts 41G ₁ , 41G ₂ , 41G ₃ , 41G ₄ are in contact with the fixed contacts 41G ₂₂ , 41G ₃₂ , 41G ₄₂ , 41G ₁₂ , respectively, and are connected to the plus side terminal 61A of the tester unit 60. The terminal 36 of the CTT plug storage unit 30 is a reference for measurement. In this state, it is checked whether or not the current plug P2 is normally short-circuited. At this time, the movable contacts 41H _{1 to} 41H ₄ of the rotary switch 41 (FIG. 6) are not connected and are not involved in checking the current plug P2.

Further, after this, the operator sets the knob 41B to a position rotated by 45 degrees. As a result, the movable contacts 41G _{1 to} 41G ₄ are not connected and are not involved in checking the current plug P2.

On the other hand, the movable contacts 41H ₁ , 41H ₂ , 41H ₃ , 41H ₄ are in contact with the fixed contacts 41H ₂₂ , 41H ₃₂ , 41H ₄₂ , 41H ₁₂ , respectively, and are connected to the plus side terminal 61A of the tester unit 60. The terminal 36 of the CTT plug storage unit 30 is a reference for measurement. In this state, it is checked whether or not the current plug P2 is normally opened.

  Thereafter, every time the operator rotates the knob 41B by 45 degrees, the current plug P2 is checked for short-circuiting and opening while shifting the measurement standard.

  As described above, in the first embodiment, the PTT plug storage section (first plug storage section) 10, the CTT plug storage section (second plug storage section) 30, and the tester section (measurement section). ) 60, a PTT rotary switch part (first changeover switch part) 20, a CTT rotary switch part (second changeover switch part) 40, and a changeover part 50. In the plug check device 1 that checks the voltage plug P1 and the current plug P2 for the test plug terminal that is mounted, each PTT plug storage unit 10 has a PTT rotary switch unit 20 to check each voltage plug P1. One of the terminals is selected, the selected terminal is connected to one measurement terminal of the tester unit 60, and the PTT plug storage unit 10 is connected. In a state in which the remaining terminals is in electrical contact, by connecting all of these terminals to the other measuring terminal of the tester unit 60, checking the voltage plug P1. In the case of the four-pole voltage plug P1, the rotary state of the knob 21B can be checked eight times in the PTT rotary switch section 20, so that the open state between all terminals can be confirmed, and the check time can be greatly shortened. Is possible.

  When checking the current plug P2, the CTT rotary switch section 40 selects one of the terminals of the CTT plug storage section 30 that are in contact with the short-circuit side of the current plug P2. The selected terminal is connected to one measurement terminal of the tester unit 60, and the remaining terminals of the terminals of the CTT plug storage unit 30 that are in contact with the short-circuit side of the current plug P2, All of these terminals are connected to the other measurement terminal of the tester unit 60 in a state of being in electrical contact with a resistor interposed therebetween, and the current plug P2 is checked. In the case of the four-pole current plug P2, it is possible to confirm that the circuit is not opened by rotating the knob 41B once in the CTT rotary switch section 40, and to greatly reduce the check time. Is possible.

  Further, since the voltage plug P1 is inserted into the PTT plug housing portion 10 and the current plug P2 is inserted into the CTT plug housing portion 30, the check is performed, so that the reliability of the check can be improved.

  In addition, since the basic device configuration includes two plug storage units 10 and 30, two rotary switches 21 and 41, a switching unit 50, and a tester unit 60, a test device can be manufactured at low cost. Is possible.

[Embodiment 2]
Next, the plug check device according to Embodiment 2 of the present invention is a plug check device for checking a voltage plug for a test plug terminal mounted on a work target board.

  The second embodiment includes a PTT plug storage unit (first plug storage unit) 10, a tester unit (measurement unit) 60, and a PTT rotary switch unit (first changeover switch unit) 20. Then, the test plug terminal voltage plug P1 mounted on the work board is checked. Details of the structure, function, and the like of each component are the same as those of the first embodiment, and the same reference numerals are given and description thereof is omitted.

  When checking the voltage plug P1, the PTT rotary switch unit 20 selects one of the terminals of the PTT plug storage unit 10 and connects the selected terminal to one measurement terminal of the tester unit 60. At the same time, in a state where the remaining terminals of the PTT plug storage unit 10 are in electrical contact, all these terminals are connected to the other measurement terminal of the tester unit 60 to check the voltage plug P1. In the case of the 4-pole voltage plug P1, in the PTT rotary switch section 20, the knob 21B can be rotated eight times so that the open state between all terminals can be confirmed, and the check time can be greatly shortened. Is possible.

  Further, since the check is performed by inserting the voltage plug P1 into the PTT plug storage unit 10, the reliability of the check can be improved. Furthermore, since the basic apparatus configuration includes one plug storage unit 10, one rotary switch 21, and tester unit 60, it is possible to manufacture a test apparatus at low cost.

[Embodiment 3]
Next, a plug check device according to Embodiment 3 of the present invention is a plug check device that checks a current plug for a test plug terminal mounted on a work board.

  In the third embodiment, a CTT plug storage section (second plug storage section) 30, a tester section (measurement section) 60, and a CTT rotary switch section (second changeover switch section) 40 are provided. Then, the current plug P2 for the test plug terminal mounted on the work target board is checked. Details of the structure, function, and the like of each component are the same as those of the first embodiment, and the same reference numerals are given and description thereof is omitted.

  When checking the current plug P2, the CTT rotary switch unit 40 selects one of the terminals of the CTT plug storage unit 30 that are in contact with the short-circuit side of the current plug P2, The selected terminal is connected to one measurement terminal of the tester unit 60, and the remaining terminals of the terminals of the CTT plug storage unit 30 that are in contact with the short-circuit side of the current plug P2 are connected to the resistance. All these terminals are connected to the other measurement terminal of the tester unit 60 in a state of being interposed and in electrical contact, and the current plug P2 is checked. In the case of the four-pole current plug P2, it is possible to confirm that the circuit is not opened by rotating the knob 41B once in the CTT rotary switch section 40, and to greatly reduce the check time. Is possible.

  In addition, since the check is performed by inserting the current plug P2 into the CTT plug storage unit 30, the reliability of the check can be improved. Furthermore, since the basic apparatus configuration includes one plug storage unit 30, one rotary switch 41, and tester unit 60, the test apparatus can be manufactured at low cost.

[Embodiment 4]
Next, the plug check device according to the fourth embodiment is the same as the plug check device 1 according to the first embodiment (see FIG. 1). 1 changeover switch portion) 20 and CTT rotary switch portion (second changeover switch portion) 40 can be selected, and the selected changeover switch portion can be selectively connected to the tester portion 60 or the megger portion. Is provided.

  Here, the megger unit is a measuring device that measures the insulation resistance, and measures the insulation resistance of the measurement object connected between the measurement terminals.

  According to the plug check device of the fourth embodiment, it is possible to achieve the same effects as the plug check device 1 of the first embodiment, and it is possible to dramatically improve the safety when using the megger.

  Further, a megger unit and a switching unit are added to the plug check device of the second embodiment or the third embodiment, and the switching unit (PTT rotary switch unit 20 or CTT rotary switch unit 40) is added by the switching unit. It is good also as a structure which can be selectively connected to the tester part 60 or the megar part. Even with such a configuration, it is possible to achieve the same effect as the plug check device of the second embodiment or the third embodiment, and it is possible to dramatically improve the safety when using the mega.

  The embodiment of the present invention has been described above, but the specific configuration is not limited to each of the above-described embodiments, and even if there is a design change or the like without departing from the gist of the present invention, It is included in this invention.

DESCRIPTION OF SYMBOLS 1 Plug check apparatus 10 PTT plug accommodating part 11-18 Terminal which contacts each phase of voltage plug P1 20 PTT rotary switch part 21 Rotary switch 21A Rod-shaped rotating shaft 21B Knob 21C 1st rotary body 21D 1st rotation conductor portion 21D ₁ fixed contact 21E second rotor 21F second rotating conductor portions 21F ₁ stationary contact 21G third rotating member 21G ₁ ~21G ₈ movable contact 21G ₂₁ ~21G ₈₁ internal wiring 21G ₁₂ ~21G ₈₂ fixed contacts 30 CTT plug storage unit 31 to 38 terminal 40 CTT rotary switch unit 41 rotary switch 41A rod-shaped rotating shaft 41B knob 41C first rotating body 41D first rotating conductor portion 41D ₁ fixed contact point 41E second rotating body 41F Second rotating conductor portion 41F ₁ fixed contact 41G Third rotating body 41G _{1 to} 41G ₄ movable contact point 41G _{21 to} 41G ₄₁ internal wiring 41G _{12 to} 41G ₄₂ fixed contact point 41H fourth rotating body 41H _{1 to} 41H ₄ movable contact point 41H _{21 to} 41H ₄₁ rod-shaped connecting tool 41H ₁₂ ˜41H ₄₂ fixed contact 41R _{1 to} 41R ₃ resistance 50 switching unit 51A _{1 to} 51A ₃ contact 51B _{1 to} 51B ₃ contact 52 switching tool 60 tester unit 61A positive side terminal 61B negative side terminal 62 meter 63 switch P1 voltage plug P2 current plug J1, J11, J12 connection point

Claims (2)

A plug check device for checking a voltage plug and a current plug for a test plug terminal mounted on a work target board,
A first plug housing portion in which the voltage plug is detachably inserted and provided with terminals that contact each terminal of the inserted voltage plug;
A second plug housing portion in which the current plug is detachably inserted and provided with terminals that contact each terminal of the inserted current plug;
A measurement unit for checking electrical continuity of a measurement object connected between measurement terminals;
One of the terminals of the first plug storage unit can be selected, and the selected terminal is connected to one measurement terminal of the measurement unit, and the rest of the first plug storage unit is connected. A first changeover switch unit that connects all these terminals to the other measurement terminal of the measurement unit in a state where the terminals are in electrical contact;
One of the terminals of the second plug storage unit that is in contact with the short-circuit side of the current plug can be selected, and the selected terminal is selected as one measurement terminal of the measurement unit. And the remaining terminals of the terminals of the second plug housing portion that are in contact with the short-circuit side of the current plug are in electrical contact with each other through a resistor. A second changeover switch part for connecting all these terminals to the other measurement terminal of the measurement part;
The first changeover switch unit and the second changeover switch unit are selectable, and the changeover unit that connects the selected changeover switch unit to the measurement unit;
A plug check device comprising: The plug check device according to claim 1, wherein the measurement unit is one of a tester unit and a megar unit.

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