JPS58158816A - State indicator for breaker - 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 Technical Field of the Invention The present invention relates to a breaker-like mosquito viewing device for displaying the open/closed state of the breaker.

Technical background of the invention and its problems Recently, as power generation capacity has become larger, the number of auxiliary machines that control power generation has become enormous.

However, on the other hand, breaker units in power plants are becoming much more compact. However, in general, the operating power supply for the circuit breaker uses a power supply with a voltage of 100V to 200V, so the wires are thick, and even more so, the power supply for the circuit breaker must have M! The -δ lamp is also written in large letters.

111i1i1, L and disconnection shape 111m! An example of how to attach a bond is shown below. Block 4 in figure 3111! ! When the breaker is turned on when the O operation power supply is on, the contact 1, which turns on the breaker in a single state, is in the OFF state, and the on-site lamp 3 and intermediate machine lamp 4 are turned on. not light. On the other hand, the 11 points 2 that are turned on when the circuit breaker is closed 1 are turned off, and the field lamp 5 and intermediate machine lamp 6 are turned on. Contact 2 when 1rra is cut off
becomes an off-state layer, and the lamp 5 for 5A-111 and the lamp 6 for medium machine do not light up, but each point 1 becomes an off state,
#4 The field lamp 3 and the central operation lamp 4 are turned on. In this way, the status of the breaker is displayed by lighting the lamp, and by displaying the lamp by pressing the operating power 1 [K of the breaker at 1 o'clock, both the open and closed lamps are turned off when the operating power is cut off. Because of this, it is also possible to monitor the power supply when it is shut off.

In general, the Nishiya AM turn-on operation is performed to confirm that the block cropping power supply for tripping is normal and to check for disconnection of the trip coil O of the circuit breaker.

This is because in the event of an accident, if the circuit breaker cannot be tripped, there is a possibility that a major accident will occur. For this reason, the state of the breaker m* is the operating power source of the breaker, 4
IK! This is done using an operating power source for disconnecting people, and it is important to know the opening/closing status of the circuit breaker and the status of the power source even in the central control room.

However, as the capacity of the electric power station increases, the number of operating auxiliary equipment increases, and the number of status display lamps also increases.Furthermore, the operating power supply for the circuit breaker is at a voltage of 100 to 200 V, so the wires and lamps are large. Therefore, it is difficult to make the unit compact, and since the breaker operation power source is displayed even in the central control room, it has to be routed far away using cables, which results in a reduction in performance. Furthermore, in combination with nearby signal transmission equipment, it has become necessary to separate 'fIILI1 in order to provide electrical insulation. K regardless, IK
It can be installed compactly, and the cable routing allows for electrically isolated interfaces with various devices without compromising reliability.
The purpose is to obtain a monitoring device.

Summary of the Invention The present invention provides a photocoupler that is connected to a power supply for operating the breaker IIO through a contact that indicates the open/closed state of the breaker, and a power supply that is different from the operation II#A of the breaker via the photocoupler output. O is a condition monitoring device characterized in that it connects and monitors the state of the breaker. 1 shows a circuit diagram of a status display device.

In the 1s2 diagram, when the power supply for operation of the Wfr unit is on and the breaker is not turned on, the contact l
is in the off state, contact 2 is in the on state, the light emitting part 11 of the photocoupler emits light, and the signal is transmitted to the light receiving part of the photocoupler. Current flows and the lamp indicator 14 lights up. When the circuit breaker is closed, contact 2 is in the OFF state, contact 1 is in the ON state, the light emitting part 8 of the photocoupler emits light, and current flows between the collector emitter of the light receiving part 9 of the photocoupler, resulting in a lamp display. The container 13 lights up. When the operating power of the WR device is off, both the light emitting parts 8 and 11 of the photocoupler do not emit light, and therefore the lamp indicators 13 and 14 are turned off, allowing TM visualization to be performed at the same time.

If this circuit is used, the lamps 3 and 5 in the JI1 diagram can be used as the light-emitting part 8 of the photocoupler of this circuit in the on-site breaker status indicator. The display can be reduced by changing the IIK. Also, the light receiving parts 9 and 12 of the photo coupler
What is the power source for operating the circuit breaker? Lamp B is used for identification in the central control room since it is possible to use completely different power sources.

There is no need to run a cut-off operation power supply to the main unit as the IK source for the 14. Therefore, the reliability of the operating power source of the circuit breaker is improved. Furthermore, by setting the power source of the photocoupler light receiving part 9.12 to a low voltage such as 5V or 24V, the wire can be made thinner than K, and by using light emitting diodes as the lamps 13 and 14, it is possible to Installation space is reduced.

In addition, by panelizing the light emitting diodes of the status display devices of each breaker in the central control room 11, the open/close status of all the circuit breakers and the operating power status of the circuit breaker can be displayed at once in the central control room. can be monitored.

By providing a relay in place of the lamp in this circuit, it becomes possible to input various signals that require the open/close state of the central control room or circuit breaker. In this case as well, it is possible to drive with a low voltage, so it is possible to use Xiaoru's relay and reduce the size of the panel.

FIG. 3 is another embodiment of the invention. In terms of operation, it is similar to the circuit shown in Figure 2, but it is similar to the photo coupler light emitting circuit.
When 8 and 11 flash, the photocoupler receives light @
9.12 becomes conductive between the collector and emitter and is input to the transmission device ξ. The signal output from the transmission device is transmitted to the outside via a microwave communication line. Generally, in a transmission device using a microcomputer, etc., the signal level is 5V, which is the operating power supply of the integrated circuit, but with this device, the output of the photocoupler is input directly to the transmission device without using a buffer. can. Also, since it is insulated from the 100 to 200 VO voltage signal by the photocoupler, it is free from nozzle problems. As shown in this example, if the transmission device Ki[m can be input, the signal can be transmitted to the outside using a 2-core cable using the microwave communication circuit, eliminating the need to route many cables and improving reliability. It is possible to do so.

Effects of the Invention As described above, according to the present invention, when a photocoupler is used in the status display device of a conventional circuit breaker, the number of display devices can be reduced compared to K, and the operating power supply of the circuit breaker can be reduced. A breaker O status display device is obtained which eliminates the need for wiring, makes the unit more compact, and provides reliability of the operating power source for the breaker.

[Brief explanation of the drawing]

[Ellll is a conventional plant circuit diagram, Broom 2 diagram is
A circuit diagram of a cutoff IIO status display device showing an embodiment of the present invention, jllI13! gI is a circuit diagram of a circuit breaker status display device showing another embodiment of the present invention. 1.2...ShiyallFr! Contact 3.4 indicating the state of I
, 5.21.22... Lamp, 7, 10... Photocoupler 8.11... Light emitting part 9 of photocoupler.
12... Light receiving parts 13, 14... of photo couplers...
Lamp gut using light emitting diodes, 16 * 19
*20... Current limiting resistor... Transmission device,
...Microwave communication line 17.18...Photocoupler output protection resistor 6...Trip coil of breaker (7317) Patent attorney Kensuke Norichika (and 1 other person) No. 2
Figure 3

Claims (1)

[Claims] A photocoupler connected to the operating power source of the breaker via a contact that indicates the open/closed state of the breaker, and a power source different from the operating power source of the breaker via the photocoupler output, A breaker status display device characterized by monitoring.