JPS59230410A - Integrated control 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 [Field of Application of the Invention] The present invention relates to a collective control panel in which a large number of units are stacked and stored.

[Background of the invention]

In various processes such as steel works and sewage treatment plants, collective control panels are used to centrally control a large number of electric motors. The collective control panel has a configuration in which control devices are grouped into units, and a plurality of these units are stacked and stored at once. Each unit includes a wiring breaker, an electromagnetic contactor, and a magnetic contactor to protect the drive of one electric motor.
It houses thermal relays, etc.

The collective control panel has a horizontal bus bar stretched across the top of the panel, a vertical bus bar is connected to the horizontal bus bar, and power is supplied to each unit from the vertical bus bar. When the unit is stored in the collective control panel, it is automatically connected to the vertical busbar, and when the unit is pulled out, it opens.

By the way, in order to connect the power to such a collective type switchboard, the power is connected through a single circuit breaker to protect against short-circuit accidents between horizontal busbars.

A conventional power supply lead-in method will be explained using FIGS. 1 and 2.

FIG. 1 is a single line connection diagram, and FIG. 2 is a structural diagram.

(from the power transformer 32 by the power cable 9) into the panel 1. Nine power cables are drawn from the pit under the floor,
It passes through the wire processing chamber 5 and is connected to the terminal block 6 of the lead-in unit 4. The lead-in board 4 is equipped with a lead-in wiring breaker (
15 (hereinafter referred to as the main circuit breaker) is installed. The lead-in plate 4 has a main circuit breaker 15 and a terminal block 6 on a steel plate 49.
It is configured with a . The retractable plate 4 is fixed to the middle frame 2 of the housing 1 with screws 10. The power supply side terminal 158 of the main circuit breaker 15 is connected to the terminal block 6 by the cable 8, and the load side terminal 15L is connected to the horizontal bus bar 18 of each phase by the cable 8. The horizontal busbar 18 is the busbar support base 1
9 and stretched over the top of the housing 1.

A vertical busbar 22 is connected to the horizontal busbar 18 of each phase by a connection busbar 21 . The vertical bus bar 22 is covered with an insulating case 23. The unit 14 is guided by the rail 13 and stored in the unit storage chamber 11. The unit storage chamber is formed by a partition plate 2o. Inside the unit 14, a wiring breaker 31, an electromagnetic contactor 88, a thermal relay 24, etc. are housed. In FIG. 2, only the wiring circuit breaker 31 is shown to simplify the illustration. Wiring breaker 3
The power supply side terminal 318 of 1 is connected by 7 to a contact (not shown) attached to the contact mounting base 35 and a cape. The contact mounted on the mounting base 35 is unit 1.
4 is completely stored in the storage chamber 11, it contacts the vertical bus bar 22 and is automatically connected. Wiring breaker 3
The first load side terminal 31L is connected by a cable 7 to a blade 55 fixed to a clip support base 51. The connection to the load cable (not shown) is also made using the clip support base 51.
They are automatically connected by clips supported by the A load IM is connected via a load cable.

Although the conventional collective control panel has been described above, it has the following problems.

Normally, the main breaker 15 is replaced after performing a protective operation once. The main reason for this is to reduce costs by minimizing the capacity of the main circuit breaker 15. However, in the conventional device, the lead-in plate 4 is fixed with screws, and the terminal block 6 is connected to the horizontal busbar 18 using a cable. For this reason, main breaker 1
The replacement work 5 is performed by removing the cable 8 and then removing the steel plate 4P. Since the cable 8 is at high voltage, it is necessary to disconnect the circuit breaker higher than the main circuit breaker 15 before removing the cable 8. Therefore, there are disadvantages in that the replacement work requires a lot of time and the process cannot be restored quickly. In the conventional device 4, the retractable plate 4 is fixed to the housing 1 based on the idea that short circuit accidents between horizontal busbars will not occur. However, in recent years, when collective control panels have been installed in locations with adverse environments, short circuits between horizontal busbars are more likely to occur due to dust and moisture. Therefore, how to shorten the time required to replace the main circuit breaker and quickly restore the process has become a major technical issue.

[Purpose of the invention]

The present invention has been made in response to the above-mentioned problems, and its purpose is to provide a collective control panel that can replace the main circuit breaker in a short time and quickly restore the process. There is a particular thing.

[Summary of the invention]

The feature of the present invention is that when the main breaker is housed in a unit and the main lead-in unit is housed in the control panel, the electrical connection between the power cable of the main breaker and the load bus (horizontal bus) is automatically connected. The purpose is to make sure that it is carried out.

[Embodiments of the invention]

An embodiment of the present invention is shown in FIGS. 3 and 4. FIG. 3 is a partially cutaway front view with the door removed, and FIG. 4 is a partially cutaway side view.

In FIGS. 3 and 4, the same symbols as in FIG. 2 indicate equivalents. The retractable unit 41 is guided by the rail 13 and stored in the unit storage chamber 11. Clip support stand 5
1 is a vertical bus bar support 5 on the upper inside of the back of the unit 4'.
Bolts are fastened at positions corresponding to 7, and both side clips 53 are incorporated therein. A connecting blade 55 is inserted into the front side of both side clips 53. The power supply side terminal 158 of the main circuit breaker 15 is connected to the connection blade 55 through the cable 8 .

The connection of the cable 8 to the blade 55 is made by means of a screw 24.

A power cable 9 is connected to the back side of the panel of the both-side clips 53, and a connecting blade 67 as described later in A is inserted. The vertical generatrix support 57 consists of an inner member 57A and an outer member 57B, as shown in FIG. 5.6. Both members 57A,
Bolt insertion holes 61 are formed in both ends of the 57B in an overlapping state, and blade insertion holes 63 are formed therethrough corresponding to the clips 53 on both sides. A vertical bus bar 22 covered with an insulating tube 23 is interposed between the inner member 57A and the outer member 57B. The vertical generatrix 22 is held between the members 57A and 57B by a bolt 27 inserted into the pole Ml insertion hole 61 and screwed into the support fitting 25. A tap fitting 65 is embedded below the opening of the blade insertion hole 63 of the outer member 57B. An L-shaped automatic connection blade 67 is inserted into the blade insertion hole 63, and its base 68 is fixed to the outer member 57B by a terminal port 69 screwed into the tap 65 and connected to the power cable 9. ing. A load side terminal 158 of the main circuit breaker 15 is connected to the contactor 37 by a cable 7. The contactor 37 is fixed to the mounting base 35 and mechanically contacts the vertical bus bar 22 when the retraction unit 4' is stored in the storage chamber 11.

On the other hand, regarding the unit 14, the connection between the vertical bus bar 22 and the load-side cable 38 is performed in substantially the same manner as in FIG. Note that 41 is a unit crime.

One embodiment of the present invention has the above-described configuration, and when the retracting unit 4' is stored in the storage chamber 11, the clips 53 on both sides
An automatic connection blade 67 is inserted into one side of the blade. Thereby, the power supply side terminal 15Sij:m of the main circuit breaker 15 is connected to the source cable 9.

In addition, the load side terminal 15L of the main circuit breaker 15 is connected to the contact 3
7 to the vertical busbar 22.

In this manner, the present invention houses the main circuit breaker 15 in a unit, and automatically connects and disconnects the main circuit breaker 15, the power supply cable 9, and the horizontal bus 18 by inserting and removing the unit. .

Replacement of the main breaker 15 can be done in a short time by simply pulling out the t-knit 4' and inserting a spare unit. Also,
In this embodiment, since the automatic connecting blade 67 inserted into the clips 53 on both sides of the unit 4' is supported by the vertical generatrix support stand 57, there is no need to provide a special member to support the automatic connecting blade 67. This can be done without increasing the score.

〔Effect of the invention〕

As explained above, according to the present invention, the lead-in main breaker can be replaced in a short time, and the process can be quickly restored.

In addition, in the above-mentioned embodiment, a unit other than the retracting unit takes care of the load, which is only a so-called moving crab knit, but it is also possible to have a monitoring unit and a control unit mixed in the control panel. Of course, you can.

[Brief explanation of the drawing]

Fig. 1 is a single-line connection diagram showing an example of the electrical circuit of a collective control panel, Fig. 2 is a partially cutaway front view showing an example of a conventional collective control panel, and Fig. 3 is an embodiment of the present invention. FIG. 4 is a partially cutaway front view showing the same, and FIG.
FIGS. 5 and 6 are detailed configuration diagrams of the automatic connection section.

Claims (1)

[Scope of Claims] 1. In a collective control panel in which a large number of units are stacked and housed, a master circuit breaker for supplying power is housed in one of the many units, and the master circuit breaker 1. A collective control panel characterized in that the main circuit breaker is electrically connected to and disconnected from the power supply cable and the load bus by inserting and removing a circuit breaker storage unit. 2. The collective control panel according to claim 1, wherein the load bus is a vertical bus located on the back of the unit.