JPS585251Y2 - Test electrode - Google Patents

Description

[Detailed explanation of the invention] This invention can be used with electrodes of different sizes.
This relates to test electrodes for insulation resistance, withstand voltage, etc.

Conventionally, when testing the insulation resistance or withstanding voltage of a cable, etc. on a switchgear with a tulip contact, the movable electrode of the switchgear was removed, and then a test electrode was inserted and a weak current was applied to conduct the above test. .

In this case, for example, for 400A and 600A switchgear, the electrode size will naturally differ due to the difference in current capacity, so test electrodes corresponding to each rating must be prepared separately. It was extremely complicated to handle with tools.

The purpose of this invention is to eliminate the above-mentioned problems and provide a movable electrode for testing that has an extremely simple structure and can be used in common with electrodes of different ratings, that is, electrodes of different sizes.

An embodiment of this invention will be described below with reference to the drawings. 1 is a test electrode lid, 2 is an electrode plate fitted into the top plate of the electrode lid 1, 3 is supported and fixed to this electrode plate 2, and the electrode lid 1 A cylindrical 'electrode tube' hanging down in the hollow part 4, 5 a pin receiver fitted and fixed in the upper end of the electrode tube 3, and 6 a threaded part protruding from the upper end of the pin receiver 5. The portion 6 is screwed onto the electrode plate 2.

7 is a vertical groove bored in the lower end surface of this pin receiver 5, 8 is a pin that passes through the pin receiver 5 on both sides of this vertical groove 7 and is spread inside the vertical groove 7, and 9 is a number of coils formed around this pin 8. A rolled base 9a,
Consisting of both legs 9b extending from this base 9a, the electrode tube 3
A substantially pine needle-shaped contact spring is supported within the contact spring, 10 is a current collecting part with a slightly upper part projecting outward from the lower ends of both legs 9b of this contact spring 9 in a substantially mountain shape, and 11 is a current collecting part below this current collecting part 10. Both legs 9
A part of the stopper 12 formed at the lower end of b is an oblong hole bored in both side walls of the electrode tube 3, from which the current collecting portion 10 of the contact spring 9 protrudes.

13 is an opening at the lower end of the electrode tube 3.

This device has the above structure, and if the inner diameter of the tulip-shaped fixed electrode 14 of the switchgear is almost the same as the outer diameter of the electrode tube 3, when this device is attached to the fixed electrode 14, the contact spring 9
Although the current collector 10 narrows inward, the tip of the current collector 10 is pressed against the inner circumferential wall of the fixed electrode 14 by the force of the spring.

Furthermore, even if the inner diameter of the fixed electrode 14 is larger than the outer diameter of the electrode tube 3, if the inner diameter of the fixed electrode 14 is smaller than the middle between the tips of the current collectors 10 on both sides, when this device is attached to the fixed electrode 14, the electrode tube 3 The protruding current collecting portion 10 that protrudes further comes into contact with the inner circumferential wall of the fixed electrode 14 .

Therefore, this invention can be applied to fixed electrodes of various diameters having an inner circumferential diameter from the outer diameter width of the electrode tube 3 (B in the figure) to the current collecting parts on both sides 10 and A) in the figure. Since contact is made reliably, it is possible to conduct tests of insulation resistance, withstand voltage, etc., which involve passing a weak current much smaller than the rated current of the switchgear.

In the above embodiment, the current collector 10 is connected to both legs 9 of the contact spring 9.
However, in the case where this is provided only on one leg 9b and it is made to protrude from only one side of the electrode tube 3, the size of the fixed electrode to which it is applied is more limited than in the above embodiment.
Of course, it has similar effects.

As mentioned above, this device can be used commonly for electrodes of various sizes corresponding to the current capacity of switchgear used for insulation resistance or withstand voltage tests of cables, etc., so it is only necessary to prepare one type of this device as a tool for testing, and the structure It is simple and convenient to handle.

[Brief explanation of drawings]

The figures show one embodiment of this invention, and Fig. 1 is a sectional front view of this invention, Fig. 2 is a side sectional view of an electrode tube of this invention, and Fig. 3 is a sectional front view of this invention.
The figure is an explanatory cross-sectional view showing the state of use of this invention. In the figure, 1 is an electrode lid, 2 is an electrode plate, 3 is an electrode tube, 5 is a pin receiver, 8 is a pin, 9 is a contact spring, 10 is a current collector, and 12 is a hole.

Claims (1)

[Scope of utility model registration request] An electrode tube 3 supported by an electrode plate 2 of a movable electrode that can be freely inserted into and removed from the fixed electrode in a test electrode for testing the insulation resistance, withstand voltage, etc. of a cable or the like via a fixed electrode.
A contact spring 9 is supported by wrapping the base 9a of the contact spring 9 around a pin 8 provided horizontally in a cylinder, and a leg part 9b of this contact spring 9 is made to extend downwardly into the cylinder, and is placed below the leg part b. A current collecting portion 10 is provided on the free end side and protrudes outward in a substantially mountain shape with a gentle slope toward the tip of the electrode tube, and the current collecting portion 10 is inserted through a hole 12 bored in the side wall of the electrode tube 3. A test electrode characterized by protruding.