JP3052197U - DC ground fault relay and DC unit type distribution board with built-in sensor - Google Patents

Abstract

(57) [Problem] To provide a DC unit-type distribution board which can eliminate replacement work of a DC ground fault relay and a sensor unit and connection of a cable when a circuit breaker is replaced. SOLUTION: A plurality of DC power supply bus bars are vertically arranged on one side inside a panel casing main body, and the unit is mounted at predetermined heights respectively on a bus bar case and a vertical support provided on the other side inside the panel casing main body. A busbar connection port is provided at a predetermined height inside the busbar case at a predetermined height, and the busbar case and the disconnecting unit 5 fixed by the unit mounting holes provided in the vertical support are connected to the busbar case through the busbar connection port. A disconnecting block 9 provided with a movable contact that comes into contact with and separated from the bus bar is attached to the disconnecting unit 5.
A DC ground fault relay equipped with a DC circuit breaker 10, a DC ground fault relay 21, and a zero-phase current detection sensor 22, and a DC unit type distribution board with a built-in sensor.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a distribution board, a distribution board, a control board, etc. (hereinafter collectively referred to as a “distribution board”). It is about the board.

[0002]

[Prior art]

 In conventional distribution boards, electrical equipment such as circuit breakers and meters were wired directly to busbars. However, in many cases, the bus power cannot be turned off under the load condition. For this reason, if a modification to change the circuit breaker due to a change in the load capacity occurs, hot work is required. When drilling, mounting, and wiring the equipment during hot-line work, there is a danger of electric shock, and there is a danger of short-circuiting by dropping objects during the work.

[0003] In addition, it is necessary to attach importance to safety during work during liveliness, so that the work period is significantly increased. Furthermore, since the installation density of the equipment was reduced in consideration of the efficiency of the wiring work, there was a limit to the size reduction of the panel.

[0004] In order to solve such a conventional problem, the applicant of the present invention disclosed in Japanese Utility Model Registration No. 30244452 in advance to prevent electric shock and short-circuit accident without turning off the power of the bus. A unit-type power distribution panel that prevents installation, allows installation and removal of units in a short time, and further reduces the size of the panel has been disclosed.

This will be described. FIG. 1 is a perspective view showing the overall configuration of the distribution board proposed above, FIG. 2 is a perspective view showing an attachment state of a bus case and a disconnecting unit, and FIG. 3 shows a movable contact part of the disconnecting unit. FIG. 4 is a perspective view, and FIG. 4 is a plan view showing a state before the movable contact is connected to the bus bar.

In these figures, 1 is a panel casing, 2 is a busbar case that covers the periphery of a plurality of bus bars 3 disposed on one side of the panel casing main body 1, and 4 is provided on the other side of the panel casing main body. The vertical supports 5 are disconnecting units fixed by unit mounting holes provided in the busbar case 2 and the vertical supports 3. As shown in FIG. 2, the busbar case 2 is provided with busbar connection ports 6 at predetermined intervals. The disconnecting unit 5 is provided with a disconnecting block 9 in which a movable contact 7 and a shutter opening / closing claw 8 are built-in so as to protrude therein, a circuit breaker 10 and the like, and a load-side terminal block 11. The disconnecting unit 5 has handlees 12 and 13 for attachment and detachment, a projection 15 which fits in a unit mounting hole 14 provided in the busbar case 2 at a predetermined interval, and a mounting provided in the vertical support 4 at a predetermined interval. A fixing hole 17 is provided for aligning with the screw hole 16 (see FIG. 1) and fixing the screw.

In the disconnecting block 9, a gear mechanism (not shown) for moving the movable contact 7 and the shutter opening / closing claw 8 is built in, and a pull-out busbar connecting handle 18 is connected to the outside. The movable contact 7 and the shutter opening / closing pawl 8 are protruded and retracted by being inserted and rotated by 270 degrees. In the figure, reference numeral 19 denotes a ground contact.

As shown in FIG. 4, a shutter 20 is provided inside busbar case 2 to block between busbar connection port 6 and busbar 3. When shutter opening / closing claw 8 is inserted, shutter 20 is opened. Is designed to open.

When the disconnecting unit 5 is mounted on the unit-type power distribution panel having the above-described configuration, the movable contact 7 and the shutter opening / closing pawl 8 are retracted, the circuit breaker 10 is deactivated, and any The disconnecting unit 5 is brought to the position of the bus bar connection port 6, and the projection 15 is inserted into the mounting hole 14 to be positioned, and the mounting screw hole 16 and the fixing hole 17 are aligned and screwed. Next, when the busbar connecting handle 18 is inserted into the handle hole of the disconnecting block 9 and rotated by 270 degrees, the shutter opening / closing pawl 8 first enters the busbar case 2 and the shutter 20 is opened. Next, the movable contact 7 contacts the bus bar 3 through the bus bar connection port 6. Then, the switch of the circuit breaker 10 is turned on to put the circuit breaker 10 into an operating state.

When removing the disconnecting unit 5, first, the switch of the circuit breaker 10 is turned off to separate it from the load, and then the movable contact 7 and the shutter opening / closing pawl 8 are retracted using the busbar connecting handle 18. Then, disconnect the wiring to the load, remove the screws, and remove the disconnecting unit 5 by holding the grips 12 and 13. Thus, the disconnecting unit 5 can be attached and detached while the bus bar 3 is in a live state.

[0011]

[Problems to be solved by the invention]

 However, since the disconnecting unit does not have a built-in DC ground fault relay and sensor such as ZCT, and the DC ground fault relay and sensor are separately installed, the unit cannot be unitized. Could not be converted. Also, when changing the rated capacity of the circuit breaker, it was necessary to replace the DC ground fault relay and the sensor with ones of the appropriate capacity, and the connection work was complicated and time-consuming.

[0012] The problem to be solved by the present invention is to provide a DC unit type distribution board which can eliminate the DC ground relay and sensor unit replacement and cable connection work related to the replacement of a breaker. To provide.

[0013]

[Means for Solving the Problems]

 In order to solve the above-mentioned problem, the DC unit type distribution board of the present invention has a plurality of bus bars for DC power supply arranged vertically on one side inside the main body of the board casing, and a busbar case covering the periphery of the bus bar. A unit mounting hole is provided at a predetermined height on each of the busbar case and the vertical support provided on the other side inside the panel casing main body, and a busbar connection port is provided at a predetermined height on the inner side of the busbar case. A movable contact that comes into contact with a bus bar in the bus case through the bus bar connection port is detachably provided on a disconnecting unit fixed by a unit mounting hole provided in the bus case and the vertical support. A disconnecting block is mounted, and a DC circuit breaker, a DC ground fault relay, and a zero-phase current detection sensor are mounted on the disconnecting unit.

[0014]

[Embodiment of the invention]

 Hereinafter, the present invention will be specifically described with reference to embodiments shown in the drawings. FIG. 5 is a plan view showing an embodiment of the disconnecting unit according to the present invention, and FIG. 6 is a front view thereof.

In FIG. 1, the disconnecting unit 5 includes a circuit breaker 10, a DC ground fault relay 21, and a current sensor 22 such as a ZCT. Reference numeral 23 in the figure is between the operation knob 10a of the circuit breaker 10 and the handle hole 25 into which the busbar connecting handle 18 is inserted, and prevents the disconnection unit 5 from being removed when the operation knob 10a is in the interlock bar. It is. 24 is a support portion of the interlock bar 23, 26 is an external terminal block, 27 is a connector for supplying power to a DC ground fault relay, 28 is a connector for operating a DC ground fault relay and extracting a trip signal of a circuit breaker, and 29 is an operation indicator light. It is.

As shown in this embodiment, in order to attach the DC ground fault relay 21 and the current sensor 22 to the disconnecting unit 5, the external terminal block 26 is placed on the back side, and the current sensor 22 is attached in the depth direction. ing. In addition, the operation indicator can be checked by arranging the operation indicator of the DC ground fault relay 21 on the front side. Further, the external terminal block is provided with a wiring space S (see FIG. 5) so that an external cable matching the rated capacity of the DC breaker can be connected.

[0017]

[Effect of the invention]

 As described above, according to the present invention, the breaker, DC ground fault relay, and current sensor unit are mounted on the disconnecting unit, so that when the capacity of the circuit breaker is changed, it is only necessary to replace the disconnecting unit. The DC ground fault relay and current sensor that match the capacity of the circuit breaker can also be replaced at the same time. Connection work can be eliminated.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the overall configuration of a distribution board proposed in the past.

FIG. 2 is a perspective view showing an attached state of a busbar case and a disconnecting unit.

FIG. 3 is a perspective view showing a movable contact portion of the disconnecting unit.

FIG. 4 is a plan view showing a state before the movable contact is connected to the bus bar.

FIG. 5 is a plan view showing an embodiment of the disconnection unit according to the present invention.

FIG. 6 is a front view showing an embodiment of the disconnection unit according to the present invention.

[Explanation of symbols]

1 panel casing, 2 busbar case, 3 busbars, 4
Vertical support, 5 disconnecting unit, 6 busbar connection port,
7 movable contactor, 8 shutter opening / closing pawl, 9 disconnection block, 10 circuit breaker, 10a operation knob, 11 load side terminal block, 12, 13 attaching / detaching handle, 14 unit mounting hole, 15 protrusion, 16 mounting screw hole, 17 Fixing hole, 18 Pull-out busbar connection handle, 19
Earth contact, 20 shutter, 21 DC ground fault relay, 22 current sensor, 23 interlock bar, 2
4 support, 25 handle hole, 26 external terminal block, 2
7 power supply connector, 28 signal extraction connector,
29 Operation indicator

Claims (1)

[Utility model registration claims] 1. A plurality of busbars for DC power supply are vertically arranged on one side inside a panel casing body, and a busbar case is provided to cover the periphery of the busbar. The busbar case and the other side inside the panel casing body. Unit mounting holes are provided at predetermined heights on the vertical posts provided at a predetermined height, bus bar connection ports are provided at predetermined heights on the inner side of the bus case, and unit mounting holes provided on the bus case and the vertical posts are provided. A disconnecting block, which is provided with a movable contact that can come into contact with and separate from the bus bar in the busbar case through the busbar connection port, is attached to the fixed disconnecting unit, and the DC disconnecting device and the DC ground fault are attached to the disconnecting unit. A DC ground fault relay with a built-in relay and zero-phase current detection sensor, and a DC unit type distribution board with a built-in sensor.