JPH0525223Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is mainly used for installing feedthrough current transformers (CT) on large-capacity, thick power cables in narrow places such as underground substations and tunnels. The present invention relates to a suitable feedthrough current transformer fitting.

(Conventional technology) Recent power substation equipment uses new equipment such as mini-crats and super-crats, so the use of large-capacity, thick power cables has increased. The work of installing sinks has also increased. Therefore, conventionally, when attaching a feedthrough current transformer to the power cable, a mounting frame has been designed and manufactured depending on the installation site of the feedthrough current transformer.

(Problem that the invention aims to solve) However, because the mounting frame was designed and manufactured according to the installation site of the feed-through current transformer, the work of installing the feed-through current transformer to the power cable was extremely troublesome. Not only that, but mass production was impossible and extremely uneconomical.

Therefore, the present invention was devised to solve the above-mentioned problems. An object of the present invention is to provide a mounting tool for a through-type current transformer that allows for extremely easy installation of a current transformer to a power cable, and that is highly economical and allows for mass production.

(Means for Solving the Problems) In order to achieve the above-mentioned purpose, the present invention has been developed to install electric power on the bottom plate of a pedestal installed in underground substations, tunnels, narrow spaces, etc., excluding the periphery. A through hole for the cable is provided, and mounting plates each having a shaft hole on the upper end side are erected on both sides of the mount, and a through-type current transformer is installed for the power cable in the shaft hole of each mounting plate. A support for attachment is rotatably supported via an appropriate shaft member.

In addition, as means for supporting each support to the frame,
The shaft holes of each mounting plate of the frame are formed longer in the vertical direction,
It is preferable that the support body is supported in this shaft hole via an appropriate shaft member so that the height can be finely adjusted.

(Function) When installing a through-type current transformer to a power cable using the technical means described above, the mount is installed in a narrow place such as an underground substation or a tunnel.
By supporting the through-type current transformer fitted to the power cable on the supports rotatably supported by each mounting plate of this mount, the through-type current transformer can be adjusted according to the installation angle of the power cable. The current transformer can be installed with a 360° angle adjustment, and can be installed at various installation sites where power cables are laid at different angles.

Further, by moving the shaft member of each support body in the vertical direction along the shaft hole of each mounting plate of the mount, the height of the through-type current transformer can be finely adjusted.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

In Figures 1 to 3, reference numeral 1 denotes a pedestal to be installed in an underground substation or a narrow place in a tunnel. A through hole 3 is bored, and a notch 6 is provided on the front and rear edges of the bottom plate 2 to prevent contact with the power cable A at the upper side of the center in the left and right longitudinal direction of the front plate 4 and the rear plate 5, and the bottom plate On the left and right side edges of 2, a protrusion 9 is provided above the central part in the longitudinal direction of the left side plate 7 and right side plate 8, respectively, and inside each of the protrusions 9 is the lower end of an inverted L-shaped mounting plate 10. The parts are formed so as to stand inwardly by fixing means using several bolts 11 and nuts 12.

Each of the mounting plates 10 is formed such that a vertically elongated shaft hole 13 is formed at the upper end of the vertical portion, and a rod insertion hole (not shown) is formed at the upper horizontal portion. There is. Further, although each mounting plate 10 is explained and illustrated as being erected inside each protrusion 9 of the pedestal 1 by means of fixing means using several bolts 11 and nuts 12, there is no limitation to this. Alternatively, they may be erected integrally on the upper edge of each protrusion 9 of the pedestal 1 without using the bolts 11 and nuts 12.

And the shaft hole 13 of each mounting plate 10 of the pedestal 1
Supports 14 for attaching the through-type current transformer B to the large-capacity, thick power cable A are supported rotatably and finely adjusted in height via appropriate shaft members 15, and At the upper surface of the inner end of the shaft member 15, there is a lower end of a threaded rod 17 for fine height adjustment, which is inserted through the rod insertion hole in the upper horizontal part of each mounting plate 10 onto the upper horizontal part of the mounting plate 10 via an adjustment nut 16. are connected to each other so that they can move up and down.

The support body 14 has a shaft hole (not shown) for inserting the shaft member 15 formed in the vertical piece 19 of the L-shaped support plate 18, and a shaft hole (not shown) for passing the shaft member 15 through the horizontal piece 20 of the support plate 18. A pair of support pieces 21 for supporting the ears C at both ends of the type current transformer B are fixed with bolts 22 and nuts 23 at appropriate intervals.

Further, as the shaft member 15, a bolt is inserted between the shaft hole 13 of the mounting plate 10 of the pedestal 1 and the support body 14.
Although the bolt head is inserted into the shaft hole of the support plate 18 so that the bolt head is on the inside and the nut is on the outside, the present invention is not limited to this, and rivets or other supporting means may also be used.

The fixture for the through-type current transformer of the present invention is made of a non-magnetic material such as stainless steel, and prevents the electromagnetic induction current of the power cable A, such as a single-core cable, from flowing. It has a structure that prevents it from overheating.

(Effects of the invention) As mentioned above, the present invention provides a through hole 3 for the power cable A in the bottom plate 2 of the pedestal 1 installed in an underground substation, a narrow place in a tunnel, etc., except for the peripheral edge. , and mounting plates 10 each having a shaft hole 13 on the upper end side are erected on both sides of the pedestal 1, and a through-type current transformer B is connected to the power cable A through the shaft hole 13 of each mounting plate 10. Since the supports 14 for attaching the current transformers are formed so as to be rotatably supported through the appropriate shaft members 15, when attaching the through-type current transformer B to the power cable A, the mount 1 is connected to the underground substation. A support body 14 is installed in a place or a narrow place in a tunnel, etc., and is rotatably supported by each mounting plate 10 of this frame 1.
, through-type current transformer B fitted to power cable A
By supporting the through-type current transformer B, the angle can be freely adjusted by 360 degrees to match the installation angle of the power cable A. It is extremely easy to attach the feedthrough current transformer B to the power cable A without designing and manufacturing a mounting frame. Moreover, since it can be applied to installation sites for various types of through-type current transformers B where the power cable A is laid at different angles, mass production is possible and extremely economical.

In addition, the shaft hole 13 of each mounting plate 10 of the pedestal 1 is formed to be long in the vertical direction, and the support body 14 is formed in this shaft hole 13.
are supported through shaft members 15 as appropriate so that the height can be finely adjusted, so that the shaft members 15 of each support body 14 can be moved in the vertical direction along the shaft holes 13 of each mounting plate 10 of the pedestal 1. Therefore, since the height of the through-type current transformer B can be finely adjusted, the work of attaching the through-type current transformer B to the power cable A is further facilitated.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; Fig. 1 is an overall perspective view, Fig. 2 is a front view of a feedthrough current transformer attached to a large-capacity thick cable, and Fig. 3 is a side view of the same. It is a diagram. 1... Frame, 2... Bottom plate, 3... Through hole, 4...
...Front plate, 5...Rear plate, 6...Notch, 7...Left side plate, 8...Right side plate, 9...Protrusion, 10...Mounting plate, 11, 22...Bolt, 12, 23 ... Nut, 13 ... Shaft hole, 14 ... Support body, 15 ... Shaft member, 16 ... Adjustment nut, 17 ... Threaded rod, 1
8... Support plate, 19... Vertical piece, 20... Horizontal piece, 21... Support piece, A... Power cable, B
...Through-type current transformer, C...Ear piece.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A power cable through-hole is provided in the bottom plate of a pedestal installed in an underground substation or a narrow place in a tunnel, etc., excluding the peripheral edge, and on both sides of the pedestal. Mounting plates each having a shaft hole are provided on the upper end side, and a support body for attaching a through-type current transformer to a power cable is freely rotatable through the shaft member as appropriate in the shaft hole of each mounting plate. A mounting fixture for a through-type current transformer, characterized in that the through-type current transformer is supported by each of the two. 2. The through-type current transformer according to claim 1, wherein the shaft hole of each mounting plate of the mount is formed to be long in the vertical direction, and the support body is supported in the shaft hole through the shaft member so as to be finely adjustable in height. Mounting hardware.