JPH0132352Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a holder for supporting a split zero-phase current transformer on an overhead wire.

In the conventional split-type zero-phase current transformer, as shown in Figure 5, a mounting plate 2 is fixed to the bottom of the vessel body 1, and the mounting plate 2 is attached to the wall of a switchboard, a beam provided on the same wall, etc. It was installed by fixing it with screws or the like and passing an electric wire through the window hole 3 of the container body 1. For example, as shown in FIG. When installing to the existing electric wire 8 connected to the breaker 7, attach the mounting plate 2 to the electric wire 8.
It is necessary to fix the electric wire 8 to a wall surface 6 close to the breaker 7, disconnect the electric wire 8 from the breaker 7, and bend the electric wire 8 toward the window hole 3 of the container body 1 to pass it through the window hole 3. Then, as shown by the dotted line in Figure 6, the length of the wire 8 becomes insufficient and it becomes impossible to connect it to the breaker 7, and the wire 8 has to be re-erected. However, it requires the troublesome work of removing the wire 8 from the breaker 7, bending it, passing it through the window hole 3 of the container body 1, and then connecting it to the breaker 7 again. However, there were some inconveniences such as making the above work difficult.

In view of the above, it is an object of the present invention to provide a holder that allows a split zero-phase current transformer to be easily attached to an arbitrary position not only to an uninstalled electric wire but also to an existing electric wire.

An embodiment of the present invention will be explained below based on the drawings 1 to 4 and 7. Reference numerals 9 and 9' denote a pair of wire clamping pieces, and these are made of a flexible material such as rubber. The molded cylinder was divided into 10, 10' in the cylinder axis direction at the middle part, and divided into 11, 11' and 12, 12' in the direction diagonal to the cylinder axis at both side parts continuous to the middle part. It has a shape. 13, 13 and 13', 13' are opposed protrusions that are integrally provided on the outer surface of the intermediate portion of the wire clamping pieces 9, 9', and the distance between them is D,
D' is made to match the interval that can be inserted between the divided zero-phase current transformer 14 with its respective divider bodies 14A and 14B joined together. 15, 15 and 15',
15' is a tightening band mounting groove provided on the outer surface of both ends of the wire clamping pieces 9, 9', 16, 16 and 16';
16' is an uneven surface provided around the inner surface of both ends of the wire clamping pieces 9, 9', and 17, 17' are integrated at opposite positions on the dividing surfaces 10, 10' of the wire clamping pieces 9, 9'. The locking protrusions 18, 18' protruding from each other are engagement holes provided at positions facing the respective locking protrusions 17', 17 on the dividing surface.
It is intended to embed. 19, 19' are opposed protrusions 1 from the intermediate portions of the wire clamping pieces 9, 9'.
3, 13 and 13', reinforcing plates with a U-shaped cross section embedded in the wall thickness, 20, 20' are uneven surfaces 16, 16 and 16' of the inner surfaces of the wire holding pieces 9, 9', With reinforcing cloth attached to the entire surface except for 16',
It is made of cotton cloth, synthetic cloth, etc.

Next, to explain how to use the holder of the split type zero-phase current transformer having the above structure, as shown in the third figure, the electric wire 21 is held between the electric wire holding pieces 9 and 9' on both sides, and each locking protrusion is 17, 17' into the engaging holes 18', 18, and the dividing surface 1
0, 10' are joined, and the diagonal dividing planes 11, 1
Tightening bands 22, 2 made of plywood are provided between the tightening band mounting grooves 15, 15' and between 15, 15', which are opposite to each other with an interval d, d' between 1' and 12, 12'.
2', screw the screws 23 into both ends thereof, and tighten both ends of the wire clamping pieces 9, 9' to the wire 21 to complete the installation of the holder. In this way, the split type zero-phase current transformer 14 is connected to the splitter bodies 14A and 14B at the interval D between the protrusions 13, 13 and the interval D' between the protrusions 13, 13 and 13', 13' of the holder attached to the electric wire 21, respectively. By sandwiching and fixing in this state, the split zero-phase current transformer 14 can be directly supported at any position on the electric wire 21.

In addition, the pair of wire clamping pieces in the above embodiment may be divided parallel to each other in the direction of the cylinder axis instead of being divided in a diagonal direction to the cylinder axis direction at both side parts continuous to the dividing surface of the intermediate part. In addition, the shapes of the wire clamping pieces and opposing protrusions in the above embodiments may be changed as appropriate.

Furthermore, although the pair of wire clamping pieces in the above embodiments have been described as completely split type, they do not necessarily have to be completely split, and one side of the pair of wire clamping pieces may be integrated with the hinge or each wire clamping piece or It may also be constructed in a clamp type connected by separately molded thin elastic pieces.

Since the present invention is configured as described above, it can be used not only for uninstalled electric wires but also for existing electric wires, for example, as shown in FIG.
It can be directly and easily attached to the electric wires 34 connected to the electric wires 34 at any position thereof, and the inconveniences of the conventional products described above can be solved. In addition, since dividing surfaces are provided that are diagonally or parallel to the axial direction on both sides of the pair of wire clamping pieces that are connected to the dividing surface in the middle, the distance between the dividing surfaces can be compressed during tightening, so that the diameter can be changed. It can also be securely attached to electrical wires. Furthermore, if the inner surfaces of the pair of wire clamping pieces are provided with an uneven surface in whole or in part, it is possible to prevent slipping on the wires, especially on the wires installed in the vertical direction. Furthermore, if a locking protrusion is provided on one of the dividing surfaces of the pair of wire clamping pieces to be joined to each other, and an engaging hole into which the locking protrusion can fit is provided on the other side, the pair of wire clamping pieces can be connected to each other. This can prevent the joint from slipping. In addition, since a reinforcing plate is embedded in the part from the wall thickness of the pair of wire holding pieces to the wall thickness of the opposing protrusion, it is possible not only to increase the strength of the protrusion, but also to increase the strength of the protrusion. It has the advantage of producing a shielding effect on the device and improving its characteristics.

[Brief explanation of drawings]

Figure 1 is a side view of the holder of the split type zero-phase current transformer according to the present invention, Figure 2 is a sectional view taken along line A-A in Figure 1, and Figure 3 is a side view of the holder attached to an electric wire. Figure 4 is a sectional view of the same state, Figure 5 is a side view of the conventional product, and Figure 6 is a schematic diagram of the conventional product in use.
FIG. 7 is a schematic diagram of the product of the present invention in use. 9, 9'... A pair of wire clamping pieces, 10, 10'...
...divided parts in the cylinder axis direction, 11, 11' and 12, 1
2'... Divided part in the diagonal direction with respect to the cylinder axis direction, 1
3, 13 and 13', 13'... Opposing protrusions, 14... Split type zero-phase current transformer, 14A, 14B
...Divider body, 15, 15 and 15', 15'...
Tightening band mounting groove, 16, 16 and 16', 1
6'... Uneven surface, 17, 17'... Locking protrusion, 1
8, 18'...Engagement hole, 19, 19'...Reinforcement plate.

Claims (1)

[Claims for Utility Model Registration] (1) A cylinder made of a flexible material such as rubber is divided into a completely split type or a clamp type in the direction of the cylinder axis at the middle part, and A split type current transformer is installed in the middle part of the outer surface of a pair of wire clamping pieces that are divided in a direction diagonal to the cylinder axis direction or parallel to each other in the cylinder axis direction on both consecutive side parts. Protrusions that oppose each other are provided at intervals that allow them to be sandwiched together when the body is joined, and mounting portions for tightening bands are provided at both ends, and the opposite protrusions are provided from within the wall thickness of the pair of wire clamping pieces. A split zero-phase current transformer holder with a reinforcing plate embedded in the thick part of the protrusion. (2) The holder for a split zero-phase current transformer according to claim 1, wherein the pair of wire clamping pieces have an uneven surface on all or part of the inner surface. (3) Registration of a utility model in which a locking protrusion is provided on one of the divided surfaces of a pair of wire clamping pieces to be joined to each other, and an engaging hole into which the locking protrusion can be fitted is provided on either side. A holder for a split type zero-phase current transformer according to claim 1 or 2.