JPS61139203A - Closed power board - 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 invention] The present invention is a power breaker and a conductor in a steel plate box.

This relates to a closed power distribution board that houses instrument transformers, meters, relays, etc., and controls the opening and closing of power systems.

[Technical background of the invention and its problems] A conventional closed switchboard has a circuit breaker 5, as shown in FIG. 2, for example. Conductor 3. The main circuit equipment such as the instrument transformer 4 is placed on the box side, and the instrument 8. Relay 7. Control instruments such as the switch 9 are configured to be attached to the door surface.

Therefore, it is necessary to electrically connect the equipment on the box side and the equipment on the door side, and the number of wires is large, and since the door is opened and closed, the configuration is complicated, and the productivity of closed switchboards is reduced. It is hindering improvement.

Furthermore, with the recent electronic control components, there is a problem in that having long wiring lines tends to cause troubles due to noise, surges, etc.

[Object of the invention] The present invention digitizes the control devices conventionally placed on the door surface of a closed switchboard, integrates them with the breaker, or stores them in an independent unit and moves them to the panel box body. The purpose is to provide a rational closed switchboard that simplifies the panel configuration.

[Summary of the Invention] The present invention provides a closed switchboard that accommodates a power breaker and is equipped with a supervisory control and protection function, in which the supervisory control and protection function is computerized and integrated or unitized into the power breaker. The computerized monitor panel for supervisory control and protection functions is exposed in front of the door of the closed switchboard, thereby reducing the size of the panel and improving operability.

[Embodiments of the invention” An embodiment of the present invention is shown in FIG.

In FIG. 1, 1 is a closed switchboard main body 5a.

5b is a power breaker according to the present invention, 10 is a monitor panel including an electronic monitoring control protection function, and the power breaker is configured as an integrated breaker.

Details of the integrated power circuit breakers 5a and 5b are shown in FIGS. 3 and 5, respectively.

Note that FIGS. 8 to 11 show examples of block configurations when the above-mentioned monitoring control protection function is computerized. FIG. 8 is an example of a measurement block diagram, FIG. 9 is an example of a control block diagram, and FIG.
The figure shows an example of a block diagram of an overcurrent relay, and FIG. 11 shows an example of a block diagram of a ground fault direction relay, which can be configured in both hardware and software using an electronic circuit and a microcomputer (CPU).

In FIG. 3, (A> is a front view, and (B) is a side view. It has the same main circuit configuration and operation mechanism as the conventional one, and is equipped with an electronic monitoring control protection unit 11. 10 is the same). The monitor panel 12 is a connector for connection.

In other words, the monitoring, control, and protection functions of the closed switchboard are made more compact by computerization, housed in a box made of IIMIWi#lI made of materials with electrical shielding effects such as steel plates, and integrated with a conventional circuit breaker. signal connection,
For connection with other circuit breakers, the connector 12 is attached to the side.
This is done by connecting.

FIG. 4 shows details of the monitor panel 10, including the digital meters 21. Meter changeover switch 22. 23° Remote-direct control location changeover switch 24. 0N- of the breaker
OFF switch 26a, 26b, display LED 2
5a, 25b, tap setting part 27a of protection relay
, 27b, etc., and protrudes from the breaker part because it needs to be exposed at the lower level of the closed switchboard.

When this integrated circuit breaker is housed in the lower part of the closed switchboard, the supervisory control protection section 11 is located at the upper part as shown in Fig. 3.
Drawer wheels are attached to the left and right sides of the box.

Furthermore, when the power supply is housed in the upper stage of a closed switchboard, the supervisory control protection section 11 is provided at the lower part, as shown in FIG.

The closed panel T5 panel is manufactured so that the monitor panel 10 is exposed at the front, and the breaker room has the same structure as the conventional one, except that the conventional control room has been removed, and the disconnection section, bus bar room, etc. are the same as before.

Therefore, since the space in the front and back direction between the door panel and the breaker, which was necessary in the conventional type because the control equipment was attached to the door surface, is no longer necessary, the depth dimension of the entire closing N panel is reduced.

Further, in the present invention, the control power source/cut MCCB, PT secondary circuit fuse, etc., which were conventionally housed in the control room within the panel, are installed in the empty spaces on the left and right sides of the breaker body.

Another embodiment of the invention is shown in FIG.

FIG. 6 shows a configuration in which the supervisory control protection section is housed in an independent control unit 28 as shown in FIG. 7, and is placed in the middle of the closed switchboard, and conventional circuit breakers 5 are placed in the upper and lower tiers. be.

The front door has three types: upper, middle, and lower, and the middle door has a structure in which two sets of monitor panels 10 of the control unit 28 are exposed.

The main circuit disconnection part of the circuit breaker, the bus bar room, etc. have the same structure as the conventional type, only the positions are changed, and the MCCB for the limiting a power supply,
The PT secondary fuses etc. will be installed in the empty spaces on the left and right sides of the control unit storage room or breaker room, as in the past.

The collective storage box (control unit) for monitoring, control, and protection shown in Figure 7 is a box with a sealed structure made of a material with an electrical shielding effect such as a steel plate, and wheels are attached to the bottom of the box so that it can be pulled out. I have to.

Connections with circuit breakers, CTs, PTs, terminal blocks for external cables, and other units are performed using connectors attached to the sides of the unit.

There are two front monitor panels, one for the upper breaker and the other for the lower breaker, the details of which are the same as in FIG. 4 above.

[Effect of the invention 1 As explained above, according to the present invention, the control equipment that was attached to the m section of the conventional closed switchboard has been moved to the panel main body side, so that it can be moved from the door section to the panel main body side via the door opening/closing section. The elimination of complicated wiring and the use of connectors to connect the control section to the outside make it possible to significantly reduce panel assembly time and material costs.

In addition, various control parts of closed switchboards are integrated with circuit breakers,
Alternatively, since it is made into a dedicated unit, the configuration of the board becomes simple, and productivity can be increased by integrating the types of boards.

Furthermore, since there is no control device on the door, there is no need for a rear space between the door and the breaker to escape the protrusion of the device, reducing the overall depth of the panel and improving the aesthetics and operability of the control surface. can do.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing an embodiment of the present invention, Fig. 2 is a block diagram showing an example of a conventional closed switchboard, Fig. 3 is a block diagram showing the lower breaker in Fig. 1, and Fig. 4 is a block diagram showing an example of a conventional closed switchboard. A front view showing an example of a monitor panel, FIG. 5 is a configuration diagram showing the upper breaker in FIG. 1, FIG. 6 is a configuration diagram showing another embodiment of the present invention, and FIG. 7 is a control diagram in FIG. 6. 1 is a block diagram showing an example of a unit, and FIGS. 8 to 11 are block diagrams showing each example of the structure when the supervisory control protection function in a closed switchboard is computerized. 1...rg 1-chain switchboard 5a, 5b...breaker 10...monitor panel 11...monitoring control protection unit 12...connector (7317) agent patent attorney Noriyuki Chika (and 1 others)
name) o. 〉 Figure 3 (θλ (β) Figure 5 Figure 4 Figure l H Figure 6 Φ Figure 7 Figure 8 Figure 10 Figure 11

Claims (1)

[Claims] In a closed switchboard that houses a power breaker and is equipped with a supervisory control protection function, the supervisory control protection function is computerized and integrated or unitized with the power breaker, and a monitor for the computerized supervisory control protection function is provided. A closed switchboard characterized in that a panel is exposed in front of the door of the closed switchboard.