JP4301658B2 - Switchgear - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to scan Itchigiya.
[0002]
[Prior art]
FIG. 7 is a schematic perspective view of the conventional switchgear with the front door opened.
In the metal closed type switchgear, the circuit breaker 2 connected to the power supply circuit is arranged in the center of the box 1 having the front door 1a. An output external terminal block 3 and a straightening duct 4 extending in the vertical direction are arranged, and for connecting / cutting off an electric device for controlling the circuit breaker 2 to a control power source on the other side of the box 1 A control power supply circuit breaker 5, a latch relay 7 that closes a contact when the circuit breaker 2 performs a breaking operation and turns on an open / close state indicator 6, and a line-adjustment duct 8 are disposed. A duct 9 extending in the left-right direction is disposed in the upper part.
[0003]
On the front door 1a, an inductive meter 10 such as a voltmeter, an ammeter, and a wattmeter that displays the voltage, current, and load power of the power circuit, a plurality of failure indicators 11, and the state of the circuit breaker 2 are displayed. An open / close state indicator 6 for switching, a plurality of open / close control switches 12 for opening / closing the circuit breaker 2, a plurality of auxiliary relays 13 for controlling the circuit breaker 2, the failure indicator 11, the open / close state indicator 6 and the like. Inductive protective relays 14 such as an overcurrent relay 14a and a ground fault relay 14b are sequentially arranged from the upper part to the lower side with appropriate intervals, and the meter 10 and the protective relay are arranged at the lowermost part. A test terminal 15 for testing an output such as 14 is disposed.
[0004]
Further, a duct 16 extending in the vertical direction is disposed at the end of the front door 1a connected to the box 1, and a pair of ducts 17 and 17 extending along the meter 10 and the protective relay 14 are provided in the duct 16. Are combined. Connection lines connected to the meter 10, the failure indicator 11, the open / close state indicator 6, the open / close control switch 12, the auxiliary relay 13 and the protective relay 14 are arranged in the ducts 16 and 17, and these connection lines are connected to the duct. The operation state information of the circuit breaker 2 is displayed on the switching state indicator 6 via the connection line. A connecting line connected to the adjacent switchgear passes between the ducts 4 and 16.
[0005]
8 is a three-wire connection diagram of the switch gear of FIG. 7, and FIG. 9 is a developed connection diagram of the switch gear of FIG. In FIG. 8, the current induced by the current transformer 18 installed in the R phase and the T phase passes through the test terminal 15 via the overcurrent relay 14a, and the voltmeter, ammeter, wattmeter, etc. The closed circuit connected to the meter 10 is refluxed. Further, the zero-phase current and zero-phase voltage signals from the zero-phase current transformer 19 that detects each phase current of the power supply circuit to which the circuit breaker 2 is connected are taken into the ground fault relay 14b. In FIG. 9, the open / close control switch 12 has an interlock circuit 12 a that defines a closing condition when the circuit breaker 2 is turned on. In FIG. 9, reference numeral 27 a is a shut-off state display contact for operating the open / close state indicator 6, and 27 b is a failure display contact for operating the failure indicator 11.
[0006]
The circuit breaker 2 includes a circuit breaker motor 2a, a closing coil 2b, and a trip coil 2c. When the closing coil 2b and the trip coil 2c are excited, the circuit breaker 2 is turned on or off, respectively. It is connected so that the circuit breaker 2 operates and trips.
[0007]
As described above, the control circuit device incorporated in the switchgear includes the control power circuit breaker 5, the latch relay 7, the meter 10, the failure indicator 11, the open / close state indicator 6, the open / close control switch 12, the auxiliary relay 13, and the protective relay. 14, electrical equipment such as an instrument current transformer 18 and a zero-phase current transformer 19 is connected.
[0008]
[Problems to be solved by the invention]
Conventionally, when an operator incorporates a control circuit device into a switchgear, the connection is complicated because the operator connects one electrical connection line to all electrical devices such as the control power circuit breaker 5 and the like. Therefore, improvement of the wiring workability has been desired. In addition, since it is necessary to confirm the output of all the electrical devices after the control circuit device is incorporated in the switch gear, the confirmation of the output is complicated, and the improvement of the output confirmation workability has been desired.
[0009]
The present invention has been made in view of such circumstances, and distinguishes between a connection circuit whose specifications are not changed at all by the user who orders the switchgear and an electric device whose specifications are changed by the user, and a connection circuit whose specifications are not changed. By connecting a module (hereinafter referred to as I / F module) and an electrical device whose specifications change to this I / F module, the I / F module can be assembled independently and prepared in advance. An object of the present invention is to provide a switchgear that can independently check the output of a module in advance and can improve the wiring workability and output check workability when the control circuit device is incorporated in the switchgear .
[0010]
Also, when the control circuit device is incorporated in the switch gear by connecting an electrical device to the I / F module with a connector or connecting the module to a wiring module having a plurality of wirings connected to other devices. An object of the present invention is to provide a switchgear that can reduce wiring errors.
[0011]
[Means for Solving the Problems]
The switchgear according to the present invention includes a wiring module connected to a control wiring of an adjacent switchgear in the switchgear body, a circuit breaker housed in the switchgear body and connected to a power circuit, and the circuit breaker. A display / controller for displaying the control and the state of control, an interlock circuit for defining the closing condition of the circuit breaker, and a plurality of individually connected to the wiring module, circuit breaker, display / controller and interlock circuit, respectively The connectors are connected to each other by a predetermined connection to connect the wiring module, the circuit breaker, the display / controller, and the interlock circuit, and the connectors are connected to each other. Between some connections of a predetermined connection, an I / F module constituting a connection circuit that is electrically connected to each other is provided, and the wiring module is cut off The display unit, the display / control unit, the interlock circuit, and each connector of the I / F module are connected by a connection line that can be connected by being separated by a predetermined distance.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments thereof.
FIG. 1 is a perspective view of a state in which a front door is opened showing a configuration of a switchgear in which an I / F module is applied to an electronic display / controller having display, protection and control functions.
[0018]
In the metal closed type switchgear, a circuit breaker (VCB) 2 connected to the power supply circuit is arranged in the center of the box 1 having the front door 1a, and a current transformer for instrument ( CT) 18 and a zero-phase current transformer (ZCT) 19 are provided with a current sensor 20 for detecting a current of a power supply circuit, and connected to another machine on the upper side of this current sensor 20, in other words, to an adjacent switchgear. A switchgear body having a plurality of wires to be connected and having a wiring module 21 acting as a crossover between boards is provided.
[0019]
An I / F module A including a plurality of connection circuits 23 to which a plurality of electrical devices such as the circuit breaker 2 and the current sensor 20 are connected is disposed on one side of the box 1. A plurality of auxiliary relays 13 for controlling the circuit breaker 2 are arranged below A, and an external terminal block 3 for receiving / outputting external signals is arranged below the auxiliary relays 13. The front door 1a is provided with a display / controller 22 for controlling the circuit breaker 2 and displaying the control state. This display / controller 22 opens and closes the circuit breaker 2, a voltmeter that displays the voltage, current, and load power of the power circuit, an ammeter, a meter such as a wattmeter, an open / close state display that displays the state of the circuit breaker 2. It is composed of electrical devices such as a plurality of open / close control switches and overcurrent relays.
[0020]
2 is a connection block diagram showing a configuration in which an electrical device is connected to an I / F module, FIG. 3 is a perspective view of an I / F module obtained by extracting a part of the electrical device constituting the control circuit device, and FIG. It is a circuit diagram in this I / F module.
[0021]
A plurality of connection circuits 23 which specification by the user does not change to order the switch gear, a control power supply 5 for supplying power required to control the circuit breaker 2, the electrical equipment connected to the circuit breaker 2 and the test terminal 15 for testing the output of a certain and a connector 24 connected via these control power 5 and test terminal 15 or other connection line as the I / F module a.
[0022]
There is one I / F module A per circuit breaker 2, and the I / F module A has a circuit breaker 2 whose specifications change depending on the user, a current transformer (CT) 18 and a zero-phase current transformer ( ZCT) 19 and other electrical devices such as a display / controller 22 are connected by connectors 24. Thus, the I / F module A to which a plurality of electrical devices are connected by the connectors 24... Is connected to the wiring module 21 by the connector 24. The contacts 25 and 26 show an example in which contacts are connected when the user needs special contact information.
[0023]
In FIG. 4, CN1~CN6 is connector 24, BH-K is controlled power 5, T · T is test pin 15.
[0024]
FIG. 5 is a three-line connection diagram in which the I / F module is surrounded by a one-dot chain line. In FIG. 5, the current induced by the instrument current transformer (CT) 18 installed in the R phase and the T phase passes through the test terminal 15 and also functions as the protective relay and meter as described above. Reflux the closed circuit leading to the display / controller 22. Further, the zero-phase current and zero-phase voltage signals from the zero-phase current transformer (ZCT) 19 are taken into the display / controller 22 which also functions as a ground fault relay as described above.
[0025]
6 is a developed connection diagram of the switchgear of FIG. In FIG. 6, the contact for turning on the circuit breaker 2 can be configured externally with an interlock circuit that defines the closing conditions when the circuit breaker 2 is turned on. In FIG. 6, the part other than the I / F module A surrounded by the thick one-dot chain line is an electrical device other than the I / F module A.
[0026]
Above control circuit device incorporated in the switch gear as is to the built-in control power supply 5 and the test terminals 15 I / F module A, the circuit breaker 2, a current sensor 20, electrical devices such as the display / controller 22 Each is connected by a connector 24... And contacts 25 and 26 are connected. The I / F module A of this control circuit device is connected to the wiring module 21 by the connector 24.
[0027]
In the above embodiment, the single display / controller 22 is shown, but the display and the controller may be separated as separate devices.
In the above embodiment has a configuration in which the I / F module A is provided with a control power supply 5 and the test terminals 15, these control power 5 and test terminal 15 is specification by the user is also Kawaruko Therefore, it is not necessary to attach the I / F module a control power 5 and test terminal 15 with the connection circuit 23.
[0028]
【The invention's effect】
According to the present invention, a connection circuit whose specification is not changed at all by a user is distinguished from an electric device whose specification is changed by a user. The connection circuit whose specification is not changed is a module, and this module is a circuit breaker, a display / control device, Since the electrical equipment that changes the specifications is connected to this module between the current sensors , the module can be assembled in advance and prepared in advance, and the output of the module can be confirmed in advance. The wiring workability and output check workability when the control circuit device is incorporated in the switch gear can be improved.
In addition, since the circuit breaker, the display / control device, and the current sensor are connected to the module by the connector, it is possible to reduce wiring errors when connecting the circuit breaker, the display / control device, and the current sensor.
[0029]
In addition, according to the present invention, since a plurality of electrical devices are connected to the module by the connector, a wiring error when connecting the plurality of electrical devices and a wiring error when incorporating the control circuit device into the switch gear are respectively provided. Less.
[0031]
Further , according to the present invention, since the I / F module having a plurality of connection circuits is connected to the wiring module having a plurality of wirings, the connection workability when the control circuit device is incorporated in the switch gear is further improved. it can.
[0032]
Further , according to the present invention, the wiring module, the circuit breaker, the display / control device, and the interlock circuit are connected to the I / F module by the connector, so that the wiring module, the circuit breaker, the display / control device, the interface is connected. Wiring errors when connecting the lock circuit can be reduced.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a configuration of a switchgear according to the present invention with a front door opened.
FIG. 2 is a connection block diagram showing a configuration in which an electrical device is connected to the I / F module of the control circuit device according to the present invention.
FIG. 3 is a perspective view of an I / F module obtained by extracting a part of the electric equipment constituting the control circuit device according to the present invention.
FIG. 4 is a circuit diagram in the I / F module of the control circuit device according to the present invention.
FIG. 5 is a three-line connection diagram in which the I / F module of the control circuit device according to the present invention is surrounded by a one-dot chain line.
6 is a development connection diagram of the switchgear of FIG. 1. FIG.
FIG. 7 is a schematic perspective view of a conventional switchgear with a front door opened.
FIG. 8 is a three-wire connection diagram of a conventional switchgear.
9 is a development connection diagram of the switchgear of FIG.
[Explanation of symbols]
20 current sensor, 21 wiring module, 22 display / controller, 23 connection circuit, 24 connector, A module.

Claims (1)

A wiring module connected to the control wiring of the adjacent switchgear in the switchgear body;
A circuit breaker housed in the switchgear body and connected to the power circuit;
A display / control device for controlling the circuit breaker and displaying a control state;
An interlock circuit for defining the circuit breaker closing condition;
The wiring module, the circuit breaker, the display / controller, and a plurality of connectors that are individually connected to the interlock circuit. The connectors are connected to each other by a predetermined connection, and the wiring module, the circuit breaker, and the display / control are connected. An I / F module that constitutes a connection circuit that is electrically connected to each other between a part of the predetermined connections that connect between the connectors and the interlock circuit and between the connectors With
The wiring module, circuit breaker, display / control unit, interlock circuit, and each connector of the I / F module are connected by a connection line that can be separated and connected by a predetermined distance. Switch gear characterized by

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