JPH0340319A - Closing operation circuit device for breaker - Google Patents

Abstract

PURPOSE:To speedily switch from a normal operation to a preliminary operation by a remote control by providing the same number of remote control positions as that of dc electromotion breakers, for switching over from the normal operation to the preliminary operation even on the central side. CONSTITUTION:Auxiliary relays 21, 22 disposed in a distributor receive a mode selection command signal of a preliminary contact 19 or normal contact 20 from a remote controller, and a keep relay 18 holds the signal. In the case where the remote controller switches the preliminary contact 19, the keep relay 18 closes contacts 18a5, 18a6, to light up a lamp 6 on the distributor side and a lamp 26 on the remote controller side. Namely, this connotes the switch-over of the mode to the preliminary side. Next, the remote controller outputs an ON command signal upon opening of the contacts 18b1, 18b2 of the keep relay 18 in the ON-OFF command circuit of a dc electromotion breaker while closure of the contacts 18a1, 18a2, and then, the signal operates an auxiliary relay 10 to close a contact 10a1 while turn on the dc electromotion breaker 17.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a circuit device for closing a circuit breaker in a DC power supply facility.

(Prior art) Conventionally, when switching a DC feeder circuit breaker from 'I:' to a backup line, a person must go to the power distribution station, change the changeover switch, etc., and then operate the disconnector and circuit breaker. A switch was taking place.

However, the distance from the central command center to the power distribution station was long, and it took a long time to switch one breaker, making operation inconvenient.

(Problem to be solved by the invention) If the DC power supply circuit breaker on the normal use side becomes disconnected for some reason, it is necessary to immediately restore the system to a normal state, so it is necessary for people to go to the power distribution station. Therefore, it may take a lot of time to operate the circuit breaker, etc.

The present invention aims to shorten the operating time of a DC feeder breaker.

[Structure of the invention]

(Means for Solving Problem A) The present invention provides an operating circuit device for a DC feeder breaker installed in a DC power supply facility, in which the operating circuit can be switched from regular use to standby mode even from remote control. , a remote control position is provided on the central side for switching from regular use to standby, and by providing this position for the number of regular DC feeder circuit breakers, the backup circuit breakers can be switched with any regular use circuit breaker. This is a DC feeding circuit breaker closing operation circuit device that allows mode switching and operation of the circuit breaker, etc., in the same way as remote control.

That is, the present invention provides an operation circuit for a circuit breaker in which a normal use and a standby DC feeder breaker are connected, and a DC feeder breaker closing operation that allows switching from a normal use to a standby one from a distance without stopping the system. levy the circuit equipment.

(Function) By adding a mode selection position for normal use to standby switching to the remote control device, switching the DC feeder breaker from normal use to standby breaker is performed entirely on the central side.

(Embodiment) Figures 1 and 2 show circuits according to an embodiment of the present invention. relay 21.2
2, and the signal is held by the keep relay 18. At this time, if there is a switching operation of the preliminary contact 19 from the remote control, the keep relay 18 is activated and the contacts 113a, .

18a, closed power distribution station side lamp 6 and remote control side lamp 26
lights up to clearly indicate that the mode has been switched to the standby side.

Next, contacts 18b□, 18b of the keep relay 18 of the ON/OFF command circuit for the DC feeding breaker from the remote control shown in Fig. 2 are opened, and conversely, the contacts 18a, 18a are closed, and the remote control device is closed. When the input command contact 1 is output, the signal operates the auxiliary relay 1O, and the contact 10ai is closed, allowing the DC feeding breaker 17 to be turned on.

Also, on the power distribution station side, switching between regular and standby modes can be easily performed by pressing the pushbutton switch 23.
When is pressed, contacts 23a1 and 23a close, but the contact 18b of the keep relay 18 is closed on the normal side, and the contact 25b□ of the auxiliary relay 25 is also closed, so the auxiliary relay 24 operates and enters self-holding. At the same time, the keep relay 18 is operated to switch the mode to the standby side. When the push button is stopped and the mode remains in the standby mode, when the push button is pressed again, the contact 23a2 closes and the mode can be switched from the standby mode to the normal mode.

In addition, in the case of the regular use side, the signal from the remote control is auxiliary relay 4,
The DC power supply circuit breaker 12 of the service line responds by the contact point 5. In direct operation on the power distribution station side, each breaker can be operated by the operation switch 7 for switching from the protection line to the regular line, the far-direct changeover switch 13 and the operation switch 14 for switching the control location.

〔Effect of the invention〕

In this way, we have made it possible to switch between the normal use and standby switching modes of the operating circuit of the DC feeding circuit breaker from remote control, so even if the breaker on the normal use side becomes OFF, the mode can be switched from remote control immediately. The system can be operated quickly using the backup line.

[Brief explanation of drawings]

1 and 2 are explanatory diagrams of an operating circuit for a DC feeding breaker showing an embodiment of the present invention. 18...Keep relay 21.22...Auxiliary relay 13...Push button switch 24.25...
Auxiliary relay 26... remote control side lamp

Claims (1)

[Claims] A first relay that is energized when the first A contact is turned on; a second A contact that is connected to the same power bus as the first A contact; and a second relay that is energized when the second A contact is turned on. A breaker consisting of a second relay, a holding relay that switches the holding state by excitation of the second relay or the first relay, and an output circuit that outputs a signal to the outside by the operation of the holding relay. Closing operation circuit device.