JPH0787626A - Interlocking circuit between switches - Google Patents

Abstract

PURPOSE:To apply burden constantly, while lightening, to the inner contacts of a switch by constituting an interlock circuit of the output contacts of a predetermined number of auxiliary relays connected with predetermined wiring between boards and a control power supply circuit. CONSTITUTION:A closing coil CC is connected between control power supply buses BP-BN through a series interlock circuit of the ON side contact of an ON/OFF switch 2 and the contacts of auxiliary relays X1, Y1, Z1 arranged in a switchboard 20. In the interlock circuit, the contact of the auxiliary relay Z1 is connected in series with the parallel joint of the auxiliary relays X1, Y1. The auxiliary relays X1, Y1, Z1 are connected with the wiring 28 between switchboards. Red and green lamps RL, GL are connected with the inner contacts of a switch 52R1 and indicates the open/close state thereof. This constitution allows constant application of lightened burden to the inner contacts of the switch 52R1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit configuration for establishing an electrical interlock between switches housed in different closed switchboards in a state where a plurality of closed switchboards housing switches are arranged in a plane. It is a thing.

[0002]

2. Description of the Related Art Before explaining the conventional example, the reason why an electrical interlock between switches such as a circuit breaker is necessary will be described. For example, FIG. 13 is a single-line connection diagram of a system that is equipped with an emergency generator for general power supply-spare two-line power reception. In the figure, a special-purpose side switch 52R1 and a spare switch 52R2 are connected to the extra-high voltage transformers 24 and 25, respectively.
An emergency generator switch 52G and an emergency switch 52GB on the closed switchboard side are connected to the emergency generator 26. A switch 52B for connecting the busbars is provided on the busbars 27. Further, a plurality of feeder switches 52F are connected to the bus bar 27 to distribute power to each feeder. Switches 52R1 and 52R for pulling in from each power source
2 and 52GB and the switch 52B for busbar connection can be opened at any time without any condition when they are opened (shut off), but when closed, to avoid parallel operation of different power sources that are not synchronized, It is necessary to satisfy the closed circuit condition as shown in 1.

[0003]

[Table 1]

As is clear from Table 1, for example, switch 52R1 has switch 52R2 or 52B open,
Moreover, it must be closed only when the switch 52GB is opened. Therefore, it is necessary to take a closing interlock on the electric circuit so that the closing condition is imposed. The switches 52R1, 52R2, 52B and 52GB to be interlocked with each other are individually housed in a closed switchboard to form a row board structure. It is necessary to provide so-called board-to-board control wiring so as to penetrate the spaces.

Next, a conventional example of an interlock circuit between switches will be described. 14 and 15 show closed switchboards 20, 22, 21 and 23 that house the switches 52R1, 52R2, 52B and 52GB shown in FIG. 13, respectively (a panel structure divided into parts shown in row board division 1). Is a diagram showing the control wiring in (). 14 and 15 are combined with each other to form one circuit diagram, and the right-hand ends of FIG. 14 are connected to the left-hand ends of FIG. 15, respectively. A closed switchboard (not shown) accommodating a feeder switch 52F (FIG. 13) and the like is arranged between the closed switchboards 20 and 21 and between 21 and 22. For example, the circuit configuration of the closed switchboard 20 (FIG. 14) will be described. The switch 52R1 and the latch relay V
11, red lamp RL, green lamp GL and on / off switch 2
Is provided. The internal circuit of the switch 52R1 is a well-known circuit composed of the a-contact and the b-contact of the switch itself, the closing coil CC and the trip coil TC, and the trip coil TC turns on when the switch 52R1 is closed. By operating the cut-off switch 2 to the cut-off side, the control voltage applied between the control power source bus lines BP and BN is applied. On the other hand, the closing coil CC is connected between the control power bus BP and BN via an interlock circuit, which will be described later, via an inter-board crossover wiring from the input side of the on / off switch 2 to another closed switchboard, When the switch 52R1 is opened, the on / off switch 2 is operated to the input side, and if the interlock circuit is closed at that time, the closing coil C is closed.
C is excited. Latch relay V11 is switch 52R1
It is set / reset according to the closing / opening of, and its output contact V11 (according to the normal notation of the sequence circuit,
The same reference numeral as that of the latch relay V11 is used. The same applies to the other closed switchboards 21, 22 and 23. All three output contacts V11 are b contacts. The circuit configurations of the other closed switchboards 21, 22 and 23 are the same except for the contents of the interlock circuit.

Next, the interlock circuit will be described. The interlock circuit between the switches of the closed switchboard arranged in rows and arranged as described above is, for example, the switch 5
As for 2R1, it is apparent that the b-contact of the latch relay V14 is connected in series to the parallel circuit of the b-contacts of the latch relays V12 and V13, as is apparent from tracing the wiring across the boards. The switch 52R2 is formed by connecting the b-contact of the latch relay V14 in series to the parallel circuit of the b-contacts of the latch relays V11 and V12. Switch 5
For 2B, the b contacts of the latch relays V11 and V13 are connected in parallel. As for the switch 52GB, the b contacts of the latch relays V11 and V13 are connected in series. The above interlock circuit is a circuit in which the conditions in Table 1 are replaced with a circuit.

[0007]

The above-mentioned conventional interlock circuit of the closed switchboard has the following problems. Only the boards of the closed switchboards 20, 21, 22 and 23 that require an electrical interlock are used for other closed switchboards (hereinafter referred to as feeder boards) that store the feeder switch 52F (FIG. 13). The wiring for interlock is not originally required, but because these feeder boards are sandwiched between the boards that require the interlock circuit due to the row board configuration, wiring between boards for interlock wiring is required. It is also necessary to install it on the feeder board. However, as shown in the upper ends of FIGS. 14 and 15, the inter-board wiring is not uniform not only in the board requiring the interlock circuit but also in each feeder board. As described above, the conventional interlock wiring has a problem in that the wiring between boards cannot be standardized and must be installed for each board according to the sequence circuit diagram each time. Moreover, since the number of output contacts of the latch relays V11 to V14 for interlock was prepared in the panel of the supplier, the number of contact points of the latch relays V11 to V14 could not be unified. . In addition, when the interlock circuit needs to be modified, the number of contacts of the latch relays V11 to V14 becomes insufficient, and the latch relay needs to be replaced, or the wiring between boards must be increased. There was a problem.

The present invention has been made in order to solve the above problems, and it is possible to standardize the interlock wiring between the boards regardless of the interlock contents of the interlock circuit. An object is to provide an interlock circuit.

[0009]

SUMMARY OF THE INVENTION The present invention is an interlock circuit between switches in a multi-plane array structure of a closed switchboard which accommodates N switches each of which is to be interlocked with each other. Interlock standard wiring consisting of N inter-panel crossover wirings for transmitting the open / closed state display signals of each switch, and a predetermined one of the N inter-panel crossover wirings provided for each closed switchboard. Of the auxiliary relays, which are connected to the inter-board crossing wiring and are to be excited, and the output contacts of the auxiliary relays, and are inserted in the closing circuit of the switch in the same closed switchboard as the auxiliary relays. And a lock circuit section. Also, an interlock standard wiring composed of (2 × N) wirings for inter-panel transmission for transmitting the switching state display signals of each of the N switches is provided for each of the closed switchboards, and N) A closed switchboard which is composed of a predetermined number of latch relays to be excited by being connected to a predetermined board-to-board wiring among the board-to-board wirings and an output contact of the latch relay, and which is the same as the latch relay. And an interlock circuit section inserted in the closing circuit of the switch inside. Also, the above N
An auxiliary relay that is connected to each internal contact of the switch of the stand and that operates in conjunction with the operation of the switch, and an N that is connected to one of the control power circuit through the output contact of the auxiliary relay.
An interlock standard wiring consisting of two board-to-board wirings and each closed switchboard are provided, one end of each of which is connected to a predetermined board-to-board wiring among the N board-to-board wirings, and the other end of each. Is composed of a predetermined number of auxiliary relays connected to the other side of the control power supply circuit and output contacts of the auxiliary relays, and an interlock inserted in the closing circuit of the switch in the same closed switchboard as the auxiliary relays. And a circuit part. Further, it is connected to one of the internal contacts of each of the N switches, and is connected to one of the control power circuit through the latch relay interlocked with the operation of the switch and the output contact of the latch relay (2 × N) Standard interlock wiring consisting of wiring between the boards and each of the above-mentioned closed switchboards, and one end of each of the above (2 ×
N) Consists of a predetermined number of latch relays connected to a predetermined board-to-board wiring among the board-to-board wirings, each other end being connected to the other of the control power circuit, and an output contact of the latch relay. And an interlock circuit section inserted into the closing circuit of the switch in the same closed switchboard as the latch relay.

[0010]

The function of the interlock standard wiring is a predetermined number of electric lines for transmitting a signal indicating the open / closed state of a plurality of switches that should be considered as an interlock condition. It is laid on each board as wiring.
Auxiliary relays or latch relays installed in a closed switchboard that requires an interlock circuit extract the open / closed state display signal of the desired switch from the interlock standard wiring laid inside the switchboard and use the output contact to Configure a switch interlock circuit for the switch in the panel.

[0011]

[Embodiment 1] FIGS. 1 and 2 are circuit diagrams showing an embodiment according to the invention of claim 1. As with the conventional example, this is a diagram showing a control circuit of a main switch of a system provided with an emergency generator for general service-spare two-line power reception shown in the single-line connection diagram of FIG. Note that FIGS. 1 and 2 are combined with each other to form one circuit diagram, and a right end a to f of FIG. 1 are connected to a left end a to f of FIG. 2, respectively. Each of the closed switchboards arranged in a row has a board configuration in which the parts shown in the row board division 1 are divided from each other.
Switch 52R1, 0, 21, 22 and 23 respectively,
52B, 52R2 and 52GB are stored. The closed switchboards 20, 21, 22 and 23 are provided with an on / off switch 2, a red lamp RL and a green lamp GL, respectively, and a predetermined number of auxiliary relays described later. A closed switchboard (not shown) accommodating a feeder switch 52F (FIG. 13) and the like is arranged between the closed switchboards 20 and 21 and between 21 and 22. Switch 52R
When charging 1, 52R2, 52B and 52GB, the charging conditions shown in Table 1 are imposed as in the conventional example.

For example, the circuit configuration of the closed switchboard 20 will be described in more detail. The internal circuit of the switch 52R1 is a well-known circuit that is composed of an a-contact and a b-contact linked with the operation of the switch itself, a closing coil CC and a trip coil TC, and the trip coil TC is the switch 52.
When R1 is closed, by operating the on / off switch 2 to the off side, the control voltage applied between the control power bus BP and BN is applied. On the other hand, the closing coil CC is connected to the ON / OFF contact of the ON / OFF switch 2 and auxiliary relays X1, Y1 and Z1 provided in the panel.
Is connected between the control power supply busbars BP and BN via a series connection with a predetermined interlock circuit composed of the contact points. The interlock circuit is auxiliary relays X1 and Y.
The b-contact of the auxiliary relay Z1 is connected in series to the b-contact of No. 1 connected in parallel. Auxiliary relay X1, Y
1 and Z1 are connected to the wiring 28 between boards. The red lamp RL and the green lamp GL are respectively connected to the internal a contact and the b contact of the switch 52R1, and display the open / closed state of the switch 52R1.

Also in the other closed switchboards 21, 22 and 23, the trip circuit of the switch and the lighting circuit of the red lamp RL and the green lamp GL are the same, but the structure of the auxiliary relay and the contacts thereof are used. The interlock circuit inserted between the input side contact of the on / off switch 2 and the closing coil CC on the closing circuit of the switch is different. That is, the auxiliary relays W1 and X2 are provided in the closed switchboard 21 and are connected to the interboard wiring 28 (a, c), respectively. Interlock circuit is auxiliary relay W1 and X2
Each of the b contacts is connected in parallel. Auxiliary relays W2, Y2, and Z2 are provided in the closed switchboard 22 and are connected to the inter-board crossover wires 28 (a, b, d), respectively. The interlock circuit consists of auxiliary relays W2 and Y2 each with b contacts connected in parallel.
The two b contacts are connected in series. Closed switchboard 23
Auxiliary relays W3 and X3 are provided inside and are respectively connected to the inter-board crossover wiring 28 (a, c). The interlock circuit is formed by connecting the b contacts of the auxiliary relays W3 and X3 in series.

The auxiliary relays X1, X2 and X3 are connected to the a contacts inside the switch 52R2 in the closed switchboard 22 via the inter-board wiring 28 (c), and are controlled when the switch 52R2 is closed. It is excited by receiving the voltage applied between the power bus BP and BN. That is, the auxiliary relays X1, X2 and X3 are provided in the closed switchboards 20, 21 and 23, respectively, and serve to monitor the open / closed state of the switch 52R2. Similarly, the auxiliary relays Y1 and Y2 provided on the closed switchboards 20 and 22, respectively, are connected to the a contact inside the switch 52B in the closed switchboard 21 via the interboard wiring 28 (b). , Switch 52B
When the circuit is closed, it is excited by receiving the voltage applied between the control power bus BP and BN. Thus, the open / closed state of the switch 52B is monitored by the auxiliary relays Y1 and Y2.
Similarly, the auxiliary relays Z1 and Z2 provided in the closed switchboards 20 and 22 are connected to each other by the inter-board crossover wiring 28 (d).
Is connected to the a contact inside the switch 52GB in the closed switchboard 23 via the switch and is energized by receiving a voltage applied between the control power bus BP and BN when the switch 52GB is closed. Thus, the open / closed state of the switch 52GB is monitored by the auxiliary relays Z1 and Z2. Similarly, the auxiliary relays W1, W2, and W3 provided in the closed switchboards 21, 22 and 23, respectively, are connected to each other by the inter-board crossover wiring 28
It is connected to the a contact inside the switch 52R1 in the closed switchboard 20 via (a), and is excited by receiving the voltage applied between the control power bus BP-BN when the switch 52R1 is closed. . Thus, the open / closed state of the switch 52R1 is monitored by the auxiliary relays W1, W2 and W3.

Therefore, for example, the interlock circuit of the switch 52R1, that is, the one in which the b contacts of the auxiliary relays X1 and Y1 are connected in parallel to the b contact of the auxiliary relay Z1 is connected in series, the switch 52R2 (X1). And 52B
At least one of (Y1) is opened (triggered), and the switch 52GB (Z1) is opened, and the switch 52R1 is permitted to be closed. It goes without saying that this matches the conditions of Table 1 shown in the description of the conventional example. Similarly, the interlock circuits for the other switches 52R2, 52B, and 52GB are also configured to meet the conditions in Table 1. The number M of the inter-board crossover wirings 28 (a to d) is equal to the number N of switches which should constitute the closing interlock condition in the closed switchboard which is a row board. That is, FIG.
There are four in the configuration. These board-to-board connecting wires 28 are electric paths for transmitting a signal indicating the open / closed state of a predetermined switch, and are laid evenly over all the boards in the row board configuration. Thus, all signals that may be needed to build the interlock circuit are provided to all boards by interboard wiring 28 as interlock standard wiring. In each board, a signal is pumped from among them using an auxiliary relay as needed, and an interlock circuit is formed in the board.

[Embodiment 2] FIGS. 3 and 4 are circuit diagrams showing another embodiment of the present invention. 3 and 4 are combined with each other to form one circuit diagram, and the right end a to f of FIG. 3 are connected to the left end a to f of FIG. 4, respectively. The difference from the first embodiment is that the interlock circuit is composed of a-contacts. In addition, auxiliary relays W1 and X that monitor the open / close status of each switch
1, Y1, Z1 etc. are "open" of the corresponding switch
Is excited in the state of. For example, in FIG. 4, the wiring c of the inter-board wiring 28 is the inside b of the switch 52R2.
The auxiliary relays X1, X2 and X3 connected to the contacts and connected to the wiring C are excited when the switch 52R2 is opened. In FIG. 3, for example, the interlock circuit of the switch 52R1, that is, a of the auxiliary relays X1 and Y1.
The switch 52R2 (X1) and the switch 52R2 (X1) and 5 which connect the contact a in parallel with the contact a in the auxiliary relay Z1 are connected in series.
At least one of 2B (Y1) is opened (triggered), and the switch 52GB (Z1) is opened, so that the switch 52R1 is permitted to be closed. It goes without saying that this is the same operation as that of the first embodiment in which the interlock circuit is constituted by the b contact. Similarly, the other switches 52R2, 52B and 5
The interlock circuit for 2 GB is also composed of a-contacts so as to operate similarly to the interlock circuit of the first embodiment.

[Embodiment 3] FIGS. 5 and 6 are circuit diagrams showing an embodiment according to the present invention. Note that FIG. 5 and FIG.
Are combined with each other to form one circuit diagram, and the right end a to n of FIG. 5 are connected to the left end a to n of FIG. 6, respectively. The same parts as those in FIGS. 1 and 2 are designated by the same reference numerals and the description thereof will be omitted. In this embodiment, a latch relay is used instead of the ordinary auxiliary relays X1, Y1 etc. as in the first embodiment (FIGS. 1 and 2).
Latch relay W11, W12, W13, X11, X1
2, X13, Y11, Y12, Z11 and Z12 are auxiliary relays W1, W2 and W in the first embodiment, respectively.
3, X1, X2, X3, Y1, Y2, Z1 and Z2. The method of assembling the interlock circuit inserted on the closing circuit is also the same. For example, the signal lines indicating the open / closed state of the switch 52R1 are connected to the a contact and the b contact inside the switch 52R1, respectively, and are connected to the inter-board crossover wiring 28. It is the latch relays W11, W12 and W13 provided on the closed switchboards 21, 22 and 23, respectively, that are connected to the two electric paths (a, b) on which the switching signals are placed among the inter-board crossover wiring 28. , The set coil S is connected to the closed signal line (a), and the reset coil R is connected to the open signal line (b). Latch relay W11, W
Each of 12 and W13 is excited only at the time of set / reset operation, and after the operation is completed, the exciting current is cut off by the self-contact, and thereafter the state is mechanically maintained.

Similarly, the open / closed state of the switch 52R2 is transmitted to the latch relays X11, X12 and X13. The open / close state of the switch 52B is determined by the latch relays Y11 and Y12.
Be transmitted to. The open / closed state of the switch 52GB is transmitted to the latch relays Z11 and Z12. In the third embodiment described above, the number M of the inter-board wirings 28 (A to C) is twice the number N of the switches that should constitute the closing interlock. That is, the number of lines is 8 in the configurations of FIGS.

[Embodiment 4] FIGS. 7 and 8 are circuit diagrams showing an embodiment according to the invention of claim 3. Note that FIGS. 7 and 8 are combined with each other to form one circuit diagram, and a right end a to f of FIG. 7 are connected to a left end a to f of FIG. 8, respectively. The same parts as those in the first embodiment (FIGS. 1 and 2) are designated by the same reference numerals and the description thereof will be omitted. The difference from the first embodiment is that the open / close state display signals of the switches 52R1, 52B, 52R2 and 52GB are not directly taken out from the a-contact inside the switches, but each of them is once an auxiliary relay V.
1, V2, V3, and V4 are excited, and their a contacts are connected from each board to the board-to-board wiring 28.

[Fifth Embodiment] FIGS. 9 and 10 are circuit diagrams showing another embodiment according to the present invention. 9 and 1
0s are combined with each other to form one circuit diagram, and a right end a to f in FIG. 9 are connected to a left end a to f in FIG. 10, respectively. The difference from the fourth embodiment is that the interlock circuit is composed of a-contacts. In addition, an auxiliary relay W that monitors the open / closed state of each switch
1, X1, Y1, Z1, etc. are excited in the "open" state of the corresponding switches. For example, in FIG. 10, the wiring C of the inter-board wiring 28 is the auxiliary relay V3.
Is connected to the control power source bus BP via the contact a.
The auxiliary relay V3 is connected to the internal contact b of the switch 52R2 and is excited when the switch 52R2 is opened. Figure 9
In the interlock circuit of the switch 52R1,
That is, in the case where the a contacts of the auxiliary relays X1 and Y1 are connected in parallel and the a contacts of the auxiliary relay Z1 are connected in series, at least one of the switches 52R2 (X1) and 52B (Y1) is open (tripping). And the switch 52GB (Z1) is opened, the switch 52R1 is allowed to be closed. It goes without saying that this is the same operation as that of the fourth embodiment in which the interlock circuit is constituted by the b contact. Similarly, the interlock circuits for the other switches 52R2, 52B and 52GB are also constituted by a-contacts so as to operate similarly to the interlock circuit of the fourth embodiment.

[Embodiment 6] FIGS. 11 and 12 are circuit diagrams showing an embodiment according to the invention of claim 4. Note that FIG.
1 and FIG. 12 are combined with each other to form one circuit diagram, and the right end a to n of FIG. 11 are connected to the left end a to n of FIG. 12, respectively. The same parts as those in the third embodiment (FIGS. 5 and 6) are designated by the same reference numerals and the description thereof will be omitted. The difference from the third embodiment is that each switch 52R1, 52R
Instead of taking out the open / closed state display signals of B, 52R2 and 52GB directly from the a-contact inside the switch, the latch relays V21, V22, V23 and V24 are once operated, and their set contact / reset contact from each board. It is configured to be connected to the board-to-board crossover wiring 28.

[0022]

As described above, according to the present invention as set forth in claims 1 to 4, a predetermined number of signals for transmitting the signals indicating the open / closed states of the plurality of switches to be considered as the interlock condition are provided. An interlock standard wiring having an electric path is laid on each panel as wiring between panels of a closed switchboard having a row panel structure, and an auxiliary relay provided in the closed switchboard requiring an interlock circuit (claim 1). And 3) or a latch relay (Claims 2 and 4), the open / close state display signal of the desired switch is taken out from the interlock standard wiring laid in the panel, and the output contact of the switch opens / closes the switch of the switch in the panel. Since the closing interlock circuit is configured, it is possible to unify the inter-board crossovers of the interlock wiring for all closed switchboards that are arranged in a row, and standardize the interlock wiring partially. There is an effect that theft can be. In addition, since the interlock standard wiring is laid on all boards that are arranged in rows, the circuit of the signal transmission part from the switch to the interlock standard wiring must consider the required number of interlock circuits of the other party. And can be unified into a minimum circuit configuration (for example, the internal contact of the switch or the internal contact of the relay on the signal transmission side is 1a + 1b, 1b or 1).
a can be unified. ). Further, even if the interlock circuit is modified, it is possible to deal with it by changing the wiring only in the panel that needs to be modified or adding a relay, and there is an effect that it is not necessary to add wiring between panels. Further, claim 1
The configurations of 3 and 3 have the effect that the number of wirings between boards is sufficient for the number of switches that require interlocking, so wiring between boards is small and wiring is easy. In the configurations of claims 2 and 4, the wiring between boards is double that of the configuration of claim 1, but since a latch relay is used, mechanical operation can be maintained and constant excitation is not required.
There is an effect that the storage of the operating state is surely held and the power consumption of the control circuit can be reduced. Claim 3
In both configurations 4 and 4, since an auxiliary relay or a latch relay that is connected to each internal contact of the switch and interlocks with the operation of the switch is provided, the load on the internal contact of the switch is fixed and The effect is that it can be made lighter.

[Brief description of drawings]

FIG. 1 is a part of a circuit diagram showing a first embodiment.

FIG. 2 is the other part of the circuit diagram showing the first embodiment.

FIG. 3 is a part of a circuit diagram showing a second embodiment.

FIG. 4 is another part of the circuit diagram showing the second embodiment.

FIG. 5 is a part of a circuit diagram showing a third embodiment.

FIG. 6 is another part of the circuit diagram showing the third embodiment.

FIG. 7 is a part of a circuit diagram showing a fourth embodiment.

FIG. 8 is another part of the circuit diagram showing the fourth embodiment.

FIG. 9 is a part of a circuit diagram showing a fifth embodiment.

FIG. 10 is another part of the circuit diagram showing the fifth embodiment.

FIG. 11 is a part of a circuit diagram showing a sixth embodiment.

FIG. 12 is another part of the circuit diagram showing the sixth embodiment.

FIG. 13 is a single-line connection diagram of a system that is equipped with an emergency generator for general power-standby dual-line power reception.

FIG. 14 is a part of a circuit diagram showing a conventional interlock circuit between switches.

FIG. 15 is another part of a circuit diagram showing a conventional interlock circuit between switches.

[Explanation of symbols]

20-23 Closed switchboard 28 Wiring between boards 52R1, 52R2, 52B, 52GB Switch W1-W3 Auxiliary relay W11-W13 Latch relay X1-X3 Auxiliary relay X11-X13 Latch relay Y1, Y2 Auxiliary relay Y11, Y12 Latch relay Z1 , Z2 Auxiliary relay Z11, Z12 Latch relay

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Michio Sakai 8 Horai-cho, Marugame City Mitsubishi Electric Corporation Marugame Factory

Claims (4)

[Claims] 1. An interlock circuit between switches in a multi-plane arrangement structure of a closed switchboard that accommodates N switches that are to be mutually interlocked with each other, and an open / closed state of each of the N switches. An interlock standard wiring consisting of N pieces of wiring between boards for transmitting a display signal, and an interlock standard wiring provided for each of the above-mentioned closed distribution boards and connected to a predetermined wiring among boards among the N pieces of wiring between boards. A predetermined number of auxiliary relays to be excited, and an interlock circuit section that is composed of the output contacts of the auxiliary relays and is inserted into the closing circuit of the switch in the same closed switchboard as the auxiliary relays. An interlock circuit between switches characterized by the above. 2. An interlock circuit between the switches in a multi-plane arrangement structure of a closed switchboard that accommodates N switches that are to be interlocked with each other, and opens and closes each of the N switches. Interlock standard wiring consisting of (2 × N) board-to-board wirings for transmitting the status display signal, and (2 × N) board-to-board wirings provided for each of the above closed switchboards. It is composed of a predetermined number of latch relays to be excited by being connected to a predetermined board-to-board wiring, and is inserted in the closing circuit of the switch in the same closed switchboard as the latch relays, which is composed of the output contacts of the latch relays. An interlock circuit between switches, comprising: an interlock circuit section. 3. An interlock circuit between switches in a multi-plane arrangement structure of a closed switchboard that accommodates N switches that are to be interlocked with each other, wherein an internal contact of each of the N switches is provided. And an interlock standard wiring consisting of N inter-board wirings connected to one side of the control power circuit through the output contacts of the auxiliary relay, which are connected to the switch, It is provided for each of the closed switchboards, and one end of each is connected to a predetermined board-to-board wiring among the N board-to-board wirings.
Each other end is composed of a certain number of auxiliary relays connected to the other of the control power circuit and output contacts of the auxiliary relays, and is inserted into the closing circuit of the switch in the same closed switchboard as the auxiliary relays. An interlock circuit between switches, comprising: an interlock circuit section. 4. An interlock circuit between switches in a multi-plane arrangement structure of a closed switchboard that accommodates N switches to be interlocked with each other, wherein an internal contact of each of the N switches is provided. And an interlock consisting of (2 × N) inter-board crossover wires connected to one of the control power circuit through output contacts of the latch relay and the latch relay that is linked to the operation of the switch. Standard wiring is provided for each closed switchboard and each end is
× N) A predetermined number of latch relays connected to a predetermined board-to-board wiring among the board-to-board wirings, each end of which is connected to the other of the control power circuit, and an output contact of the latch relay. An interlock circuit between the switches, comprising: an interlock circuit unit configured to be inserted into a closing circuit of the switch in the same closed switchboard as the latch relay.