JP3448911B2 - Interlock circuit between switches - Google Patents

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. Further, an interlock standard wiring composed of (2 × N) inter-board crossover wirings for transmitting the open / closed state display signals of each of the N switches is provided for each closed switchboard, 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. FIG. 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 they are divided into parts shown in a row board division 1, and switches 52R1, 52B, 52R2 and 52R1, 52B, 52R2 are respectively provided in the closed switchboards 20, 21, 22 and 23. 52
GB is stored. In addition, 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 switch 52F for the feeder is provided between the closed switchboards 20 and 21 and between the closed switchboards 21 and 22.
A closed switchboard (not shown) accommodating (FIG. 13) and the like is arranged. Switches 52R1, 52R2, 52B and 52
When charging GB, 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 28a between boards. Board
An assembly of inter-connect wiring 28a is called an interlock standard wiring.
To do. 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 the switch 5
Displays the open / closed status of 2R1.

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 inter-board crossover wiring 28a (a, c), respectively. The interlock circuit uses auxiliary relays W1 and X
Each of the two b contacts is connected in parallel. Auxiliary relays W2, Y2 and Z2 are provided in the closed switchboard 22 and are respectively connected to inter-board crossover wires 28a (a, b, d). Interlock circuit is auxiliary relay W2 and Y
The b contacts of the auxiliary relay Z2 are connected in series to the b contacts of 2 connected in parallel. Auxiliary relays W3 and X3 are provided in the closed switchboard 23 and are connected to the inter-board crossover wiring 28a (a, c), respectively. The interlock circuit is for each of the auxiliary relays W3 and X3.
The contacts are connected 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 crossover wiring 28a (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 respectively closed switchboards 20 and 21.
23 and 23, it serves to monitor the open / closed state of the switch 52R2. Such a control power bus BP
For the a-contact inside the switch 52R2 and the board-to-board wiring 28a
The line from which the switch is opened and closed is transmitted to the wiring 28a across the panels.
It is called an open / closed state signal line because it has the function of opening. 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 inter-board crossover wiring 28a (b). When the switch 52B 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, closed switchboard 2
The auxiliary relays Z1 and Z2 respectively provided in 0 and 22 are connected to the a contact inside the switch 52GB in the closed switchboard 23 via the inter-board wiring 28a (d), and the switch 52GB Control power bus BP-B when closed
It is excited by receiving the voltage applied between N. Thus
The open / closed state of the switch 52GB is monitored by the auxiliary relays Z1 and Z2. Similarly, closed switchboards 21, 22
And auxiliary relays W1 and W2 respectively provided in
And W3 are connected to the a contact inside the switch 52R1 in the closed switchboard 20 via the interboard wiring 28a (a), and when the switch 52R1 is closed, the control power bus BP is connected.
-It is excited by receiving the voltage applied between BN. In this way, the open / close state of the switch 52R1 is determined by the auxiliary relays W1 and 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 board-to-board crossover wirings 28a (a to d) is equal to the number N of the switches which should constitute the closing interlock condition in the closed switchboard which is a row board. That is, there are four in the configuration of FIG. Wiring 28a between these boards
Is an electric circuit for transmitting a signal indicating the open / closed state of a predetermined switch, and is 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 28a 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. Further, the auxiliary relays W1, X1, Y1, Z1 etc. for monitoring the open / closed state of each switch are excited in the "open" state of the corresponding switch.
For example, in FIG. 4, the wiring c of the inter-board wiring 28a is connected to the internal b contact of the switch 52R2 and is connected to the auxiliary relays X1, X2, and X3.
Is excited when the switch 52R2 is opened. In FIG. 3, for example, the interlock circuit of the switch 52R1, that is, the one in which the a contacts of the auxiliary relays X1 and Y1 are connected in parallel to the a contact of the auxiliary relay Z1 is connected in series,
At least one of the switches 52R2 (X1) and 52B (Y1) is opened (triggered), and the switch 52
Switch 5 provided that GB (Z1) is open
It works to allow the input of 2R1. 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 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 first embodiment.

[Embodiment 3] FIGS. 5 and 6 are circuit diagrams showing an embodiment according to the invention of claim 2. Note that FIGS. 5 and 6 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, W1
2, W13, X11, X12, X13, Y11, Y1
2, Z11 and Z12 are auxiliary relays W1, W2, W3, X1, X2, X3 and Y in the first embodiment, respectively.
It corresponds to 1, 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 28a . Of the board-to-board crossover wiring 28a , the two relays (a, b) carrying these open / close signals are connected to the latch relays W11, W12 provided on the closed switchboards 21, 22 and 23, respectively.
And W13, each 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 relays W11, W12 and W13
Are 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 inter-board wirings 28a (a to h) is twice the number N of switches that should constitute a 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. It should be noted that FIG. 7 and FIG.
7 to form one circuit diagram.
F is connected to a to F on the left end of FIG. 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 each switch 5
2R1, 52B, 52R2 and 52GB open / close state display signals are not directly taken out from the a-contact inside the switch, but are once auxiliary relays V1, V2, V3 and V4, respectively.
To excite, and to connect those a contacts from each board to the board 2
It is configured to connect to 8a .

[Fifth Embodiment] FIGS. 9 and 10 are circuit diagrams showing another embodiment according to the present invention. 9 and 10 are combined with each other to
Two circuit diagrams are formed, and the right end of FIG.
F is connected to a to F on the left end of FIG. The difference from the fourth embodiment is that the interlock circuit is composed of a-contacts. In addition, auxiliary relays W1, X1, Y1, Z1 etc. that monitor the open / closed state of each switch are
It is excited in the "open" state of the corresponding switch. For example, in FIG. 10, the wiring c of the board-to-board wiring 28a is connected to the control power source bus BP via the a contact of the auxiliary relay V3. Auxiliary relay V3 is switch 5
The switch 52R2 is connected to the internal b contact of 2R2.
Is excited when the circuit is opened. In FIG. 9, for example, the switch 5
2R1 interlock circuit, that is, auxiliary relays X1 and Y1 in which a contacts are connected in parallel, auxiliary relay Z1
Of the switch a 52R2 (X
1) and 52B (Y1), at least one of which is opened (triggered), and the switch 52GB (Z1) is opened, and works to permit closing of the switch 52R1. 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 other switches 52R2, 5R
The interlock circuits for 2B and 52GB operate similarly to the interlock circuit of the fourth embodiment.
It is composed of a-contact.

[Sixth Embodiment] FIGS. 11 and 12 are circuit diagrams showing an embodiment according to the present invention. Note that FIG. 11 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 of the switches 52R1, 52B, 52R2 and 52GB.
Instead of directly taking out the open / closed state display signal of the switch from the a-contact inside the switch, the latch relays V21, V
22, V23 and V24 are operated to connect the set contacts and the reset contacts from each board to the board-to-board crossover wiring 28a .

[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, inter-board wiring of interlock wiring can be unified for all closed switchboards that are arranged in rows, and some interlock wiring is standardized. That there is an effect that it is.
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. Therefore, the circuit configuration can be unified to the minimum circuit configuration (for example, the internal contact of the switch or the internal contact of the relay on the signal transmission side can be unified to 1a + 1b, 1b or 1a). 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, the configurations of claims 1 and 3 have an effect that the number of wirings between boards is sufficient for the number of switches requiring interlocks, 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 by using a latch relay, mechanical operation can be held and constant excitation is not required, so the operation state is stored. There is an effect that the holding is reliable and the power consumption of the control circuit can be reduced. Since both the configurations of claims 3 and 4 are provided with 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, the load on the internal contact of the switch is fixed. In addition, there is an effect 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 another 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 includes an emergency generator for general power supply-spare two-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 the circuit diagram showing a conventional interlock circuit between switches.

[Explanation of symbols]

20-23 Closed switchboard 28 Interlock sign
Sub-wiring 28a Board-to-board crossover wiring 52R1, 52R2, 52B, 52GB Switch V1 to V4 auxiliary relay (second
Auxiliary relay) V21 to V24 latch relay (second
Latch relay ) W1 to W3 Auxiliary relay (first
Auxiliary relay) W11 to W13 Latch relay (first
Latch relay ) X1 to X3 Auxiliary relay (first
Auxiliary relay) X11 to X13 Latch relay (first
Latch relay ) Y1, Y2 Auxiliary relay (first
Auxiliary relay) Y11, Y12 Latch relay (first
Latch relay ) Z1, Z2 Auxiliary relay (first
Auxiliary relay) Z11, Z12 Latch relay (first
Latch release)

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masafumi Uesa 8 Horai-cho, Marugame City Mitsubishi Electric Co., Ltd. Marugame Factory (72) Inventor Michio Sakai 8 Horai-cho Marugame City Mitsubishi Electric Co., Ltd. Marugame Factory (56 ) Reference JP-A-5-83817 (JP, A) JP-A-59-50735 (JP, A) JP-A-6-181026 (JP, A) JP-A-57-23426 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) H02B 1 / 24,3 / 00 H01H 9/54-9/56

Claims (4)

(57) [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. The interlock standard wiring consisting of N wirings for transmitting the display signals respectively and the operation of the switch connected in series with the internal contact of the switch.
Linked to one of the control power circuit and the switch
Connect to the corresponding board crossover wiring and open / close the above board crossover wiring.
An open / close state signal line for transmitting a state display signal and another closed wiring provided for each of the above-mentioned closed switchboards and subject to interlock control among the N wirings between the boards.
The first auxiliary relay is constituted by a combination of a first auxiliary relay which is connected to the inter-board wiring corresponding to the switch in the switchboard and is excited, and an output contact of the first auxiliary relay. An interlock device between switches, comprising: an interlock circuit unit inserted in series with a closing switch in a closing circuit of the switch in the same closed switchboard. 2. An interlock circuit between switches in a multi-plane array structure of a closed switchboard that accommodates N switches that are to be interlocked with each other, and an open / closed state of each of the N switches. The interlock standard wiring consisting of (2 × N) wirings for inter-panel transmission for transmitting the display signal respectively, and the operation of the switch connected in series with the internal contact of the switch.
Linked to one of the control power circuit and the switch
Connect to the corresponding board crossover wiring and open / close the above board crossover wiring.
An open / closed state signal line for transmitting a state display signal, and an interlock control target of the (2 × N) interplanetary wiring provided for each of the above-mentioned closed switchboards
First Ratchirire which is connected to the closed switchboard in the panel between the transition wiring which corresponds to the switch of the excitation - and the first Ratchirire - constituted by an output contact of said first Ratchirire - same closure and An interlock device between switches, comprising: an interlock circuit unit inserted in series with a closing switch in a closing circuit of the switch in a switchboard. 3. An interlock circuit between switches in a multi-plane array structure of a closed switchboard that accommodates N switches each of which is to be interlocked with each other, and an open / closed state of each of the N switches. The interlock standard wiring consisting of N wirings for transmitting the display signals respectively and the operation of the switch connected in series with the internal contact of the switch.
Control power supply circuit via the second auxiliary relay that operates in conjunction with the work and the output contact of the second auxiliary relay.
Connect one side of the switch to the wiring between the panels corresponding to the switch.
Then, the open / close status signal is sent to the wiring between the boards.
A closed state signal line and other closed distribution boards provided for each of the above-mentioned closed switchboards and subject to interlock control of the above-mentioned N inter-board wirings.
The first auxiliary relay is connected to the inter-board wiring corresponding to the switch in the switchboard and excited, and the output contact of the first auxiliary relay is used.
An interlock device between switches, comprising: an interlock circuit part inserted in series with a closing switch in a closing circuit of the switch in the same closed switchboard as the first auxiliary relay. . 4. An interlock circuit between switches in a multi-plane array structure of a closed switchboard that accommodates N switches that are to be interlocked with each other, and an open / closed state of each of the N switches. The interlock standard wiring consisting of (2 × N) wirings for inter-panel transmission for transmitting the display signal respectively, and the operation of the switch connected in series with the internal contact of the switch.
Control power supply via a second latch relay that operates in tandem with the operation and the output contact of the second latch relay.
And one and panel between the transition wiring which corresponds to the said open 閉器 tracts
Connect and send the open / close status display signal to the wiring between the boards
An open / closed state signal line and an object for interlock control of the (2 × N) inter-board wiring provided for each closed switchboard
First Ratchirire which is connected to the closed switchboard in the panel between the transition wiring which corresponds to the switch of the excitation - and the first Ratchirire - constituted by an output contact of said first Ratchirire - same closure and An interlock device between switches, comprising: an interlock circuit unit inserted in series with a closing switch in a closing circuit of the switch in a switchboard.