JP2853492B2 - Electrical interlock 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 an electrical interlock system between switches housed in different closed switchboards in a state where closed switchboards containing switches are arranged in a row.

[0002]

2. Description of the Related Art Before explaining the conventional example, it is explained why an electrical interlock between circuit breakers is necessary. For example, FIG.
Is a single-line connection diagram provided with an emergency generator with a common extra-high voltage transformer secondary two-line connection, and 20 is an extra-high voltage transformer 1
A circuit breaker 21 is a circuit breaker 21 on the extra high voltage transformer 2, a circuit breaker 22 for a bus connecting the secondary sides of the extra high voltage transformers 1 and 2, 2.
Reference numeral 3 denotes an emergency circuit breaker, and 24 denotes a bus-bar communication circuit breaker that communicates with a purchased bus. The circuit breaker 20 is a circuit breaker 21 or a circuit breaker 2.
2 is open and the circuit breaker 23 is not open.
Must take the interlock that cannot be inserted. In addition, on a hardware basis, each circuit breaker is housed in a closed switchboard and is in a row board state. Here, the purchased bus means a purchased power bus and an emergency generated power bus.

Hereinafter, a conventional example will be described with reference to the drawings. Fig. 3 shows a state where the closed switchboard containing the switch is lined up.
When an electrical interlock is applied between switches housed in different closed switchboards (especially when an operation b contact of one switch is electrically connected to five switches).
FIG. In the figure, reference numeral 1 denotes a partition of a closed switchboard, 1a denotes a closed switchboard which accommodates a switch having five operation-b contacts for electrically interlocking five switches in the switchboard of the closed switchboard, Reference numeral 1b denotes a closed switchboard that houses a switch, which is one of the switches for applying an electrical input interlock, in a row of closed switchboards. Reference numeral 2 denotes an operation b contact for applying electrical interlock to five switches.
3 is a switch which is one of the switches for applying the electric input interlock, and 4, 5, 6, 7 is a switch which is one of the switches for applying the electric input interlock. is there. 8 is an on / off switch corresponding to the switch 2, 9 is an on / off switch corresponding to the switch 3, 2a is a closing coil in the switch 2, 2b is a trip coil in the switch 2, 2c is a switch Reference numeral 3 denotes an operating contact for electrical interlock, 3a denotes a closing coil in the switch 3, and 3b denotes a trip coil in the switch 3.

[0004] A connection line exceeding the division of the closed switchboard indicates a crossover between boards.

Next, the operation will be described. When electrical interlocking is performed between switches housed in different closed switchboards in a state where the closed switchboards accommodating the conventional switches are arranged in a row, five switches housed in the closed switchboard 1a are used. One operation b in the switch 2 having five b-contacts (break contacts) for applying an electrical interlock to the switch
Both ends of the contact are put into the closed switchboard 1b by crossover wires between the boards. Both ends of the operation b contact placed in the closed switchboard 1b are inserted into the closing circuit of the switch 3, which is one of the switches for applying the electric closing interlock, to thereby perform the electrical interlock with respect to the switch 3. Multiply.

Similarly, the switches 4, 5, 6, and 7 have five operating contacts for electrically interlocking the five switches housed in the closed switchboard 1a. The electrical interlock is applied to switches 4, 5, 6, and 7 by inserting both ends of the remaining four operation b contacts in switch 2 into the closing circuits of the switches by connecting wires between boards. Can be For example, when the closing coil 2a in the switch 2 is closed, the operation b contact is open,
An interlock is provided so that the switch 3 does not operate even when the closing switch 9 of the switch 3 is turned on.

[0007] Each switch is connected to a closed switchboard that houses the switch by a secondary junction (connector) provided in each switch.

[0008]

The conventional electric interlock system between switches housed in different closed switchboards in a state in which the closed switchboards containing switchgears are arranged in a row is constituted as described above. Therefore, there were the following problems.

The required number of operating contacts for applying an electrical interlock differs depending on the switch. Conventionally, from the viewpoint of making each switch compatible, an operating contact for applying an electrical interlock is required. Of switches that require the largest number of operating contacts among switches that have the largest number of operating contacts.However, for switches that do not require operating contacts for electrical interlocking, they have useless operating contacts. Will be. In general, among switches housed in a row of closed switchboards, most of the switches do not require operating contacts for electrical interlock. In addition, the contact capacity must be greater than the contact capacity required for switching control of the switch.

The connection between the switch and the closed switchboard for accommodating the switch is made by a secondary junction (connector) in each switch. , 5, 6, 7 are located in a switch 2 which has five operating contacts b for electrically interlocking.
If the next junction has been removed, another switch 3,
No normal electrical interlock operation could be performed for 4, 5, 6, and 7.

Further, the five operating contacts b of the switch 2 which require operating contacts for electrical interlocking are connected to switches 3, 4, 5, 6, 7 for electrical interlocking.
In this case, both ends of the operation-b contact are made to cross between the boards to be inserted into the closing circuit, so that the number of crossover wires between the boards increases.

The present invention has been made to solve the above problems, and has the following objects.

[0013] The required number of operating contacts for applying an electrical interlock is made to be the same for each switch, and the use of useless operating contacts for a switch that does not require an operating contact for applying an electrical interlock is minimized. Reduce.

The operating contact capacity for applying the electrical interlock built into the switch is preferably less than the contact capacity required for controlling the opening and closing of the switch.

Operation for electrically interlocking the other switches 3, 4, 5, 6, and 7 When the secondary junction (connector) in the switch 2 having five contacts b is disconnected. But for the other switches 3, 4, 5, 6, 7
Enable normal electrical interlock operation.

The operation b of the switch 2 which requires an operation contact for applying an electrical interlock, even when the contact b is inserted into the closing circuit of the switches 3, 4, 5, 6, 7 for applying the electric interlock. , Minimizing the increase in crossover between boards.

[0017]

Means for solving the problem of the electric interlock system between switches according to the present invention will be described below.

[0018] The required number of operating contacts for applying an electrical interlock does not differ depending on the switch, and the use of useless operating contacts for a switch that does not require an operating contact for applying an electric interlock is minimized. In order to reduce the number of contacts, the operating contacts for the electrical interlock incorporated in the switch are unified as one operation a contact and one contact b, and the required number of operating contacts for applying the electrical interlock is the operation a contact ( The contact is ensured by increasing the number of contacts by driving a mechanical latch relay mounted on a closed switchboard by using one each of a make contact and a b contact (break contact).

The contact capacity for exciting the set coil and the reset coil of the mechanical latch relay mounted on the closed switchboard is usually smaller than the contact capacity required for controlling the opening and closing of the switch. Locking action a
The contact capacity of each one contact and one b contact is reduced.

A mechanical latch relay mounted on a closed switchboard is not mounted on a closed switchboard 1a housing a switch 2 which requires an operating contact for applying an electrical interlock, but is not mounted on a closed switchboard 1a. , 4, 5, 6, and 7 are mounted on each closed switchboard, and the operation of the mechanical latch relay is performed by the operation a of the switch 2 which is wired with a crossover between the boards.
This is performed for each one contact and one b contact.

[0021]

The operation of the electrical interlock system between switches according to the present invention will be described below.

The required number of operating contacts for applying an electrical interlock does not differ depending on the switch, and a switch that does not require an operating contact for applying an electric interlock has useless operating contacts. As little as possible.

The operating contact capacity for applying the electrical interlock built into the switch is equal to or larger than the contact capacity for exciting the set coil and the reset coil of the mechanical latch relay and equal to or smaller than the contact capacity required for the opening / closing control of the switch. Become.

Operation for electrically interlocking the other switches 3, 4, 5, 6, and 7 When the secondary junction (connector) in the switch 2 having five contacts b is removed. But for the other switches 3, 4, 5, 6, 7
Normal electrical interlock operation can be performed.

The operation b of the switch 2 which requires an operating contact for applying an electrical interlock is inserted into the closing circuit of the switches 3, 4, 5, 6, 7 for applying the electrical interlock. In addition, the increase in crossover between boards is minimized.

[0026]

【Example】

Embodiment 1 FIG. Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a case where an electrical interlock is applied between switches housed in different closed switchboards in a state in which the closed switchboards housing the switches are arranged in a row (particularly, the operation b contact of one switch is used. FIG. 5 is a connection diagram in a case where five switches are electrically interlocked. In the figure, 1
Is an operation for electrically interlocking the five switches in the closed switchboard lane;
A closed switchboard for accommodating a switch having one contact and one b-contact each is a closed switchboard for accommodating a switch, which is one of switches for applying an electrical interlock in a row of the closed switchboard. 2 is an electrical interlock operation for applying electrical interlock to five switches. A switch having one a contact (make contact) and one b contact (break contact), and 3 is an electrical input interlock. One of the switches to lock
The switches 4,5,6,7, which are tables, are switches which are one of the switches for applying an electrical input interlock. 8 is an on / off switch corresponding to the switch 2, 9 is an on / off switch corresponding to the switch 3, and 10 is mounted on the closed switchboard 1a.
This is a mechanical latch relay having five output b contacts for electrically interlocking the switches of the table. Also, 2
a is a closing coil in the switch 2, 2b is a trip coil in the switch 2, 2c is an operating contact for electrical interlock in the switch 2, 3a is a closing coil in the switch 3, 3b is a switch 3
The trip coil inside.

Note that a connection line that exceeds the row division of the closed switchboard indicates a crossover between boards.

Next, the operation will be described. When interlocking between switches housed in different closed switchboards is performed in a state where the closed switchboards accommodating the conventional switches are arranged in a row, the electrical interlocks housed in the closed switchboard 1a are required. An operation a contact in the switch 2 having one operation a contact and one b contact for locking is connected so as to excite the set coil of the mechanical latch relay 10. In addition, the reset coil of the mechanical latch relay 10 is connected so as to excite it at the operation b contact, and both ends of one output b contact of the mechanical latch relay 10 are put into the closed switchboard 1b by the crossover between the boards. . Both ends of the output b contact of the mechanical latch relay 10 placed in the closed switchboard 1b are connected to the switch 3 by being inserted into the closing circuit of the switch 3, which is one of the switches for applying an electrical closing interlock. Apply an electrical interlock to it.

Similarly, the switches 4, 5, 6, and 7 have five output b contacts for electrically interlocking the five switches mounted on the closed switchboard 1a. By inserting both ends of the remaining four output b-contacts in the static latch relay 10 into the closing circuits of the respective switches by inter-panel crossover wires, the switches 4, 5, 6, and 7 are electrically interlocked. Can be multiplied.

The connection between each switch and the closed switchboard accommodating the switch is made by a secondary junction (connector) in each switch.

Embodiment 2 FIG. Hereinafter, a second embodiment of the present invention will be described with reference to the drawings. FIG. 2 shows a case where an electrical interlock is applied between switches housed in different closed switchboards in a state where the closed switchboards housing the switches are arranged in a row.
FIG. 9 is a connection diagram of a case where five switches are electrically connected to each other using an operation b contact of two switches. In the figure, reference numeral 1 denotes a division of a closed switchboard, and 1a denotes an operation a contact for electrically interlocking five switches in the closet of a closed switchboard. The closed switchboard 1b is a closed switchboard that houses a switch, which is one of switches for applying an electrical input interlock, in a row of the closed switchboard. 2 is an operation for electric interlock for applying an electric interlock to five switches.
A switch having one contact and one b contact, and 3 is a switch which is one of switches for applying an electrical interlock.
Reference numerals 4, 5, 6, and 7 denote switches which are one of switches for applying an electrical input interlock. 8 is an on / off switch corresponding to the switch 2, 9 is an on / off switch corresponding to the switch 3,
Reference numeral 10 denotes a mechanical latch relay mounted on the closed switchboard 1b and having one output b contact for electrically interlocking the corresponding switch 3; 11, 12, 13, and 14 apply an electrical input interlock. This is a mechanical latch relay that is mounted on each closed switchboard that houses a switch and has one output contact b for electrically interlocking the corresponding switches 4, 5, 6, and 7. Further, 2a is a closing coil in the switch 2, 2b is a trip coil in the switch 2, 2c is an operating contact for electrical interlock in the switch 2, 3a is a closing coil in the switch 3, 3b is This is a trip coil in the switch 3.

Note that a connection line exceeding the partition distribution of the closed switchboard indicates a crossover between the panels.

Next, the operation will be described. When the electrical interlock between the switches housed in different closed switchboards is to be performed in a state where the closed switchboards accommodating the conventional switches are arranged in a row, the electrical interlocks housed in the closed switchboard 1a are used. One end of the operation a contact and one end of the operation a contact in the switch 2 having one operation a contact and one b contact for locking are connected to the power supply positive side. Then, one end of each is crossed over the row board 1 of the closed switchboard by a crossover between boards, and the set coils of the mechanical latch relays 10, 11, 12, 13, and 14 mounted on the different closed switchboards are respectively operated at the contact a. Mechanical latch relays 10, 11, 1 which are connected so as to be excited and which are mounted on different closed switchboards, each with an operating contact b
The reset coils 2, 13, and 14 are connected so as to be excited. Each mechanical latch relay 10, 11, 12, 1
Both ends of the output b-contacts of the switches 3, 4, 5, 6, 7 are inserted into the closing circuits of the switches 3, 4, 5, 6, 7 for applying the corresponding electric closing interlock to the switches 3, 4, 5, 6, 7 Apply an electrical interlock to it.

The connection between each switch and the closed switchboard accommodating the switch is made by a secondary junction (connector) in each switch.

Embodiment 3 FIG. In the second embodiment, the mechanical latch relays 10 and 1 are connected to the interlocking contact of the switch 1 and are energized and de-energized by the operation of the contact.
Although 1, 12, 13, and 14 are used, the relay may be a normal auxiliary relay, and the same effect as that of the second embodiment can be obtained.

[0036]

As described above, the present invention has the following effects.

The required number of operating contacts for applying the electric interlock can be made different depending on the switch, and the use of useless operating contacts for the switch which does not require the operating contact for applying the electric interlock is minimized. Can be reduced.

The operating contact capacity for applying the electrical interlock built into the switch is equal to or larger than the contact capacity for exciting the set coil and the reset coil of the mechanical latch relay and equal to or smaller than the contact capacity required for switching control of the switch. it can.

Operation for electrically interlocking the other switches 3, 4, 5, 6, and 7 When the secondary junction (connector) in the switch 2 having five contacts b is disconnected. But for the other switches 3, 4, 5, 6, 7
Normal electrical interlock operation can be performed.

The operation b of the switch 2, which requires an operating contact for applying an electrical interlock, is inserted into the closing circuit of the switches 3, 4, 5, 6, 7 for applying the electrical interlock. In addition, the increase in crossover between boards can be minimized.

[Brief description of the drawings]

FIG. 1 is a connection diagram of an electrical interlock system between switches according to a first embodiment of the present invention.

FIG. 2 is a connection diagram of an electrical interlock system between switches according to a second embodiment of the present invention.

FIG. 3 is a connection diagram of a conventional electrical interlock method between switches.

FIG. 4 is a typical single-line connection diagram with an emergency generator with a service-standby two-line power receiving.

[Explanation of symbols]

1 Closed switchboard lane division 1a Closed switchboard accommodating a switch having an operating contact for electrically interlocking a switch in the closed switchboard lane 1b Closed switchboard electrical in-lock interlock Switchboard that houses a switch, which is one of the switches that is operated by a switch 2 A switch that has operating contacts for electrical interlock for applying an electrical interlock to the switch 2a A closing coil 2b in the switch 2 that is opened and closed Trip coil in switch 2 2c Operating contact for electrical interlock in switch 2 3 Switch that is one of the switches for applying electrical closing interlock 3a Closing coil in switch 3 3b Switch 3 4 A switch that is one of the switches for applying the electrical closing interlock 5 A switch that is one of the switches for applying the electrical closing interlock 6 The electrical closing interlock 7 is a switch which is one of the switches for applying an electrical interlock. 8 is an on / off switch corresponding to the switch 2 9 is an on / off switch corresponding to the switch 3 10 is closed A mechanical latch relay which is mounted on a switchboard and has an output contact for electrically interlocking a corresponding switch. 11 An output contact for mounting an electrical interlock on a corresponding switch mounted on a closed switchboard. Mechanical latch relay 12 A mechanical latch relay mounted on a closed switchboard and having an output contact for electrically interlocking a corresponding switch. 13 An electrical interlock on a corresponding switch mounted on a closed switchboard. Mechanical latch relay with output contacts of 14 The output contacts for electrical interlock to the corresponding switch mounted on the closed switchboard Mechanical latch relay held 20 Extra high voltage transformer 1 side circuit breaker 21 Extra high voltage transformer 2 side circuit breaker 22 Circuit breaker for connecting the secondary side of extra high voltage transformers 1 and 2 23 Emergency circuit breaker 24 Bus breaker for connecting bus

────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Michio Sakai 8-8 Horai-cho, Marugame-shi, Kagawa Prefecture Mitsubishi Electric Corporation Marugame Works (56) References JP-A-53-135443 (JP, A) (58) Survey Field (Int.Cl. ⁶ , DB name) H01H 33/59 H02B 1/24

Claims (2)

(57) [Claims] (1) Each closed switchboard containing a switch is a row board.
Opening to electrically interlock different closed switchboards
In the electrical interlock method between switches,
Has a latch function on the closed switchboard on the side that sends out the
Auxiliary relays are installed and are built into the switch
Operating contacts for the electrical interlock
And the auxiliary coil is connected so as to excite the
The output contacts of the laser can be electrically interlocked.
Of switches built into one or more closed switchboards
Each contact is used for control, and the electrical
An electrical interlock method between switches, wherein an interlock is applied. 2. The closed switchboard containing the switch is a row board.
Opening to electrically interlock different closed switchboards
In the electrical interlock method between switches,
Closed switchboard that sends out the interlock signal and the interlock
One or more units that are electrically interlocked based on the signal
Is provided with a plurality of closed switchboards, and
Latch on each of the closed switchboards where the lock is applied
An auxiliary relay having a function is mounted, and the
Built in the switchboard of the closed switchboard that sends out the
The auxiliary relay is connected to the operating contact for electrical interlock.
Are connected in parallel, and the output connection of the auxiliary relay is connected.
Points to electrically interlock each closed switchboard
An electrical interlock system between switches characterized by using contacts .