JPH0529208U - Unit of transformer and branch box - Google Patents

Abstract

(57) [Summary] [Purpose] A power distribution cubicle and a circuit breaker group are incorporated in the power cubicle. In the event of an earthquake, because the vibration characteristics of the transformer and the vibration characteristics of the circuit breaker group for wiring differ, the relative position between the two repeatedly changes, which causes a force to be applied to the copper strips and wires connected between them, The insulator of the secondary terminal may be cracked, the connection part may be loosened, or the copper band or electric wire may be broken. The purpose of the present invention is to prevent the occurrence of such an accident. [Construction] In the present invention, a circuit breaker for wiring is installed and fixed to a branch box, and the branch box is fixedly fixed to a distribution transformer by a supporting member. As a result, the relative position of the distribution transformer and the branch box, that is, the circuit breaker group, does not change even during vibration such as an earthquake, so no force is applied to the copper strips and wires connected between them. It is possible to prevent cracking of the insulator of the transformer secondary terminal, loosening of the connecting portion, and breakage of the copper band and electric wire.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

The present invention relates to an assembly structure of a distribution transformer and a branch box that houses a circuit breaker group.

[Prior Art]

A distribution transformer and a circuit breaker group are incorporated in the power cubicle. In the past, in the event of an earthquake, etc., the vibration characteristics of the transformer and the circuit breaker group for wiring differ, so the relative position of the transformer and the circuit breaker group for wiring repeatedly changes. In the event of a large earthquake when force was applied to the copper strips and wires, the insulators of the transformer secondary terminals could be cracked, the connections could become loose, and the copper strips and wires could be broken.

[Problems to be solved by the device]

[0004] In a power cubicle, it is possible to prevent the relative position of the transformer and the circuit breaker group from changing due to vibration during an earthquake or the like, and prevent loosening or breakage of the connection of the copper band or the electric wire. This is the task of the present invention.

[Means for Solving the Problems]

In order to solve the above-mentioned problems, in the present invention, a branch box accommodating a circuit breaker group is fixed to a distribution transformer by using a supporting member, and a secondary terminal of the distribution transformer is fixed. Connect the input terminals of the circuit breaker group with a copper band or an electric wire.

[Work]

The support member fixes the branch box to the distribution transformer, and thus the circuit breaker group housed in the distribution box is also fixed to the distribution transformer. The transformer for distribution and the circuit breaker group for wiring vibrate together. Therefore, the relative positions of the two do not change, and no force is applied to the connecting copper strips or electric wires between them, so that no loosening or breakage of the connecting part occurs.

【Example】

FIG. 1 is a top view of a transformer and branch box unit showing an embodiment of the present invention, FIG. 2 is a side view, and FIG. 3 is a front view. 1 to 3, reference numeral 1 denotes an oil-filled transformer for power distribution, which is composed of an oil-filled tank 2, a cooling fin 3, an installation frame 4, an upper lid 5, a high pressure primary terminal 6, and a low pressure secondary terminal 7. The transformer body is contained in the oil tank 2.

Reference numeral 8 is a branch box in which a plurality of wiring breakers 9 are housed. The secondary terminal 7 of the oil-filled transformer 1 and the input terminal (not shown) of the circuit breaker 9 for wiring are connected by a copper strip 10. The branch box 8 is fixed to the oil-filled tank 2 by a mounting band 11. The front side of the branch box 8 is a door 12, and a handle 13 for opening and closing the door is attached. A voltmeter 14 and an ammeter 15 are arranged on the door 12. The handle 9 a for operating the circuit breaker 9 for wiring is projected from the door 12 so that the door 12 can be operated with the door 12 closed.

Since the branch box 8 is firmly fixed to the oil-filled tank 2 of the oil-filled transformer 1 by the mounting band 11, the plurality of circuit breakers 9 in the branch box 8 are also fixed to the oil-filled transformer 1. Fixed to. Therefore, the relative position of the secondary terminal 7 of the oil-filled transformer 1 and the breaker 9 for wiring does not change and does not change at the time of vibration due to an earthquake or the like. Since no force is applied to the copper band or the wire, the terminal connection will not be loosened and the copper band or wire will not be broken.

FIG. 4 shows another embodiment of the present invention, and is a top view in the case where the power distribution transformer is a mold transformer, and FIG. 5 is a side view thereof. In FIGS. 4 and 5, reference numeral 21 denotes a mold transformer, and 22 is a mold portion. 1 and 2 are designated by the same reference numerals, and the description thereof will be omitted. Reference numeral 23 is a terminal block, 24 is a base frame, 25 is a vertical frame, and 26 is a support plate.

A vertical frame 25 is welded to a rectangular base frame 24 made by welding shaped steel. The mold transformer 21 is fixed to the base frame 24 by bolting the installation frame 4. The terminal block 23 and the vertical frame 25 are fixed to each other by bolting the support plate 26. The branch box 8 is attached to the vertical frame 25 by bolting (not shown).

As assembled and fixed as described above, the group of circuit breakers 9 mounted in the branch box 8 is fixedly fixed to the mold transformer 21. Therefore, the relative position of the secondary terminal 7 of the mold transformer 21 and the circuit breaker 9 for wiring does not change and does not change during vibration such as an earthquake, so that the connection between the secondary terminal 7 and the circuit breaker 9 for wiring is not changed. Since no force is applied to the copper strip 10 or the electric wire, the terminal connecting portion is not loosened and the copper strip or the electric wire is not broken.

[Effect of the device]

 As is apparent from the above description, according to the present invention, the transformer for distribution and the branch box accommodating the circuit breaker group are integrally fixed, whereby the insulator of the secondary terminal of the transformer is cracked or the copper strip is cut. It is possible to prevent loosening of the wire or the terminal connection part of the wire, or to prevent a breakage accident. This will ensure safe and reliable power distribution even in the event of a disaster such as an earthquake. Further, since the transformer and the branch box are unitized, the secondary conductor of the transformer through which a large current flows becomes extremely short, and therefore the space occupied by the conductor also becomes small as the voltage drop on the line decreases.

[Brief description of drawings]

FIG. 1 is a top view showing an embodiment of a transformer and branch box unit according to the present invention.

FIG. 2 is a side view of the above.

FIG. 3 is a front view of the above.

FIG. 4 is a top view showing another embodiment of the transformer and branch box unit according to the present invention.

FIG. 5 is a side view of the above.

[Explanation of symbols]

 1 ... Oil-filled transformer 2 ... Oil-filled tank 3 ... Cooling fin 5 ... Top cover 6 ... Primary terminal 7 ... Secondary terminal 8 ... Branch box 9 ... Wiring circuit breaker 10 ... Copper strip 11 ... Mounting band 21 ... Mold transformer 22 Mold part 23 Terminal block 24 Base frame 25 Vertical frame 26 Support plate

Claims (3)

[Scope of utility model registration request] 1. In an assembly structure of a distribution transformer and a branch box accommodating and fixing a circuit breaker group, a branch member is fixed to the distribution transformer by a supporting member, and a secondary terminal of the distribution transformer. And the input terminal of the wiring breaker group is connected by a conductor, a unit of a transformer and a branch box. 2. The transformer and branch box unit according to claim 1, wherein the support member is a band-shaped mounting band, and the mounting band is wound around a distribution transformer to fix the branch box. And branch box unit. 3. The transformer and branch box unit according to claim 1, wherein a distribution transformer is installed and fixed to a frame made of shaped steel, and the branch box is fixed to a vertical surface of the frame. Unit of transformer and branch box.