JPS5858840A - Multiple circuit switch controller - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Chrysanthemum) Technical Field The present invention relates to a multi-circuit switch control device used, for example, to protect a wiring system.

(b) Prior art jg1 Figure 6 - Multi-circuit switch and multi-circuit switch control device (
Hereinafter, it will be referred to as a control device. ), an example of a block diagram of a control device is shown in FIG. Below, Figures 1 and 2
The conventional technology will be explained using figures.

In Figure 1 (-), one of the circuit breakers 11 is connected to the substation busbar, and the other is connected to the multi-circuit switch 4S12 and the power transformer 13.The multi-circuit switch 12 is connected to the switch 12-1
~ It has four switches called switch 12-4, and the other end is connected to distribution line 15-1, 15-2...15-
4 through the load (2 connected; control device 14-
Control devices 1 to 14-4 control the amount of electricity from the power transformer 13 and send closing commands to the switches 12-1 to 12-4.

FIG. 2 is a block diagram of one of the control devices 14-1 to 14-4; the others have a similar configuration. The amount of electricity from the power transformer 13 is transferred to the turn-on time limit circuit 21
and instantaneous power failure detection circuit 22 (operated by two people. Closing time limit circuit 2
1 is an input line: when a voltage is applied (2) after a certain period of time (hereinafter referred to as application time) (- output is generated). On the other hand, the instantaneous power failure detection circuit 22 detects ζ when the power is reapplied after a momentary power failure. Two outputs are generated. These two outputs are logically summed (OR circuit) and are input to the input command circuit 24.

The closing command circuit 24 outputs the amount of electricity of the source transformer 13 to the closing circuit of the switch in response to input application.

The operation of the multi-circuit switch and the control device will be explained below. When the circuit breaker 11 is closed, human power is applied to the control devices 14-1 to 14-4 via the power transformer 13 to start the closing time circuit 21 in the control device, and after the closing time limit, the closing command circuit 24 is activated. Send closing command to switch, switch 1
2-1 to 12-4 are in a closed circuit state (= exists. This is the normal state. Here, the closing time of the control devices 14-1 to 14-4 is usually set to a different setting time, and therefore, The switches 12-1 to 12-4 are sequentially closed.

Here, when the switches 12-1 to 12-4 are in the closed state, let us consider the case where an instantaneous power outage occurs in the upper system. ;Second, rigging! 11
4-1 to 14-41m have a momentary power failure detection circuit 22, and when the power is restored after a momentary power failure, they open and close instantly according to the output of the momentary power failure detection circuit 22 without waiting for the output of the turn-on timer circuit 21. It is configured to issue a charge command to the container. In other words, C2 opens and closes after the momentary power failure recovers! Four switches 14-1 to 14-4 simultaneously (double-in operation).Switch 1
4-1 to switch 14-4 are 1liE with little closing hold.
It is possible to do this with current, but it requires a large current when turning on. Therefore, the power transformer 13 is required to have the closing capacity for four switches; however, since it is normally turned on sequentially, it only requires the capacity for one switch (; It is uneconomical to use a power transformer with the capacity of four C2 switches just to respond to the current situation, and since it is a large C2, it requires a large installation area, and the weight increases, so the installation location is also limited. This results in a significant increase in costs.

(C) Purpose The present invention was made in order to eliminate the drawbacks of the above-mentioned prior art, and provides a multi-circuit switch control that makes it possible to control a multi-circuit switch without requiring a large-capacity power transformer. The purpose is to provide equipment.

(d) Example Hereinafter, one example of the present invention is shown in FIG. 3 (explained in two parts). are given the same reference numerals, and their explanations will be omitted. 25 is a time-limited operation circuit (on-delay timer) that controls the output of the input command circuit 24 for an arbitrary period of time, for example, input 4, from when the flow starts to rise until it sufficiently falls. This is a circuit that can send the signal to the switch with a delay of approximately 0.5 seconds.

With this configuration, when reapplying power after a momentary power failure,
The instantaneous power failure detection circuit 22 instantly outputs the output, and the input command circuit 2
4 is activated, and its output is instantaneously displayed, but the time-limited operation circuit 2
1 (=The closing time is short enough. It is possible to delay the signal for any desired period of time and then apply it to the closing circuit of the switch.
If the delay time of each control device is set differently, each switch in the multi-circuit switch can be closed sequentially.
Moreover, it is possible to prevent long-term system outages 1 to 4. Therefore, it is possible to economically and stably supply magnetic force using the control device of the present invention (according to the power transformer with the capacity of one switch). 0(e) Other Embodiments Next (-1) Another embodiment of the present invention will be explained using the fs4 diagram. FIG. 4 is an internal block diagram of a multi-circuit switch, and the same parts as FIG. : are given the same reference numerals, and their explanations will be omitted.

In FIG. 4, the time-limited operation circuit 30 is connected to the output side of the instantaneous power failure detection circuit 22. According to this configuration C, when the power is reapplied after a momentary power failure (2), the momentary power failure detection circuit 22 outputs an instantaneous (2) output, but the time-limited operation circuit 25 delays the output for a sufficiently short period of time beyond the power-on time; Furthermore, by setting the delay times of each control device differently, it is possible to avoid simultaneous closing of the switches in the event of a momentary power outage, and it is also possible to prevent a long power outage in the system. ,
According to the control device of the present invention, economical and stable power supply can be performed using a power transformer having the capacity of one switch.

In addition, according to this configuration (2), a closing command is sent to the switch from the closing time limit circuit 21 via the closing command circuit 24,
In operation, since there is no addition of the delay time of the closing time (two-time limit operation circuit 21), it is possible to manage the closing time with higher accuracy.

(f) Effects As explained above (=, the present invention has a configuration in which a time-limited operation circuit is inserted that can extend the closing command for an arbitrary period of time (2. Therefore, using a power transformer with the capacity of one switch,
The advantage is that an economical multi-circuit switchgear control device can be provided.

[Brief explanation of drawings]

Fig. 1 is a system diagram showing an application example of a multi-circuit switch and a multi-circuit switch control device, Fig. 2 is a block diagram of a conventional multi-circuit switch, and Fig. 3 is a multi-circuit switch control according to the present invention. FIG. 4 is a block diagram of one embodiment of the apparatus; FIG. 4 is a block diagram of another embodiment of the invention.

Claims (2)

[Claims] (1) A multi-circuit switch control device for controlling the closing of a multi-circuit switch equipped with a plurality of switches connected to the electric station busbar port using a common circuit breaker. An input timer circuit that determines the presence or absence of a power source by inputting the amount of electricity output from the power transformer to be excited and generates an output after a scheduled time limit, and a momentary power interruption of the system by inputting the amount of electricity output from the power transformer. However, when there is an output from the instantaneous power failure detection circuit that generates an output and one of the two circuits mentioned above (= the closing command circuit that sends the closing command to the multi-circuit switch, and the output signal of this closing command circuit) A multi-circuit switch control device comprising: a time-limited operation circuit that is energized; (2) In a multi-circuit switch control device that controls the closing of a multi-circuit switch equipped with a plurality of switches connected to the electric station bus line (= connected) via a common breaker, the circuit breaker is energized when the interrupter is turned on. A power-on timer circuit that inputs the output electricity quantity of the power transformer to determine the presence or absence of the power supply and generates an output after a scheduled time limit; A momentary power failure detection circuit that generates an output; and a time-limited operation circuit that performs a time-limited operation in response to the output signal of the instantaneous power failure detection circuit that detects a momentary power failure; A multi-circuit switch control device comprising: a closing command circuit that receives an output signal and sends a closing command to the multi-circuit switch.