SU427298A1 - - Google Patents

Description

(54) DEVICE FOR ELECTRIC TESTS TESTING ISOLATING PROTECTIVE PRODUCTS

This achieves the inaccessibility of penetration into the bath when the position of the contact pins is on.

In addition, the contact grounding pin is slightly longer than the high-voltage pin, which provides a preliminary grounding of the water in the bath.

An electric equipment unit contains a step-up transformer 9, which has four terminals: one high-voltage one, equipped with a separate sleeve, and three output through a separate pin in the common sleeve. The transformer is attached to the bottom of the apparatus with four lanes W.

To exclude the possibility of mounting wires to the high-voltage output of the booster transformer, an insulating partition made of organic glass 11 is placed above it.

The rheostat 12 for adjusting the test voltage has a worm room 13 supported by brackets 14. A nut moves with a brush contact of the rheostat 15. A shaft 16 with a retracting handle is mounted on the upper end of the shaft. For ease of use, there are finger hollows on the side of the handwheel.

The housing of the apparatus is equipped with a compartment / 7, where the power cord and bushing are located — a high-voltage output plugged into the slot of the high-voltage output terminal of the device in case of testing high voltage indicators, operational rods, clamp meters, etc. High voltage output is not shown.

The handle 18 of the overcurrent machine is displayed on the device panel. Through the slits of the panel, the scales of milliammeter 19 and kilometer meter are visible. From above, the panel is covered with a thin sheet of plexiglass (not on the drawings: software; cauldron). The eyes of red 2J and green 22 signal lamps are also located on the apparatus panel.

For transporting the apparatus, there are two handles 23, which can be combined with a bracket attached to one of the handles, when the apparatus is carried by one person, or disconnected when carried by two faces and during testing.

On the bottom of the apparatus from the outside there are four legs 2 of rubber. -;

For earthing the housing there is a D1M: On the housing with a nut 25 of the "lamb type." A high-voltage contact pin is attached to a flexible copper wire 26 with an electrode 27 made of brass sheet at the end. Electrode-27 is inserted inside the test product filled with water: for the "grounding of water" serves the electrode 25. Its shape and size are as follows. you; that in the horizontal and vertical position of the vanilla it is in the water in the bath. .

For a dielectric glove or tool pendant, with an insulated handle serves as a crocodile clip, 29. For convenience, there are two handles on the back.

Work with the apparatus of the production is as follows. The apparatus is grounded. The test article is placed in the bath, water is poured into the interior of the article, and also into the bath. Then, the bath is inserted with contact pins into the sockets of the apparatus (depending on the position of the bath in the lower, with its horizontal position, or in the upper with vertical sleeves).

Then, the flywheel of the booster rheostat in the leftmost position and the grip of the machine gun are turned off. Turn on the power cord (taken out of the compartment) to the network. A green light indicates that power is available. Include. av-gomat. Lighting the red lamp indicates that the booster transformer is under voltage.

Rotating the handwheel of the rheostat clockwise, smoothly raises the voltage, controlling its magnitude by the kilovoltmeter and the magnitude of the leakage current through the product by the milliammeter.

: If; the leakage current exceeds the permissible value and then a further increase in voltage is stopped, the device is turned off and the product is rejected.

Upon product breakdown or when a leakage current through it reaches 15 Ma, the device is automatically switched off by an automatic device.

The proposed device is convenient to operate,. not. requires additional elements (insulators for installation of the bath, fences provided with interlocking), it is portable, it allows to carry out tests in any conditions, including field ones.

Due to the fact that the bath opening is displaced, it is above any water level in any of the operating positions of the bath. When testing dielectric overshoes, the working position of the bath is horizontal, and during testing: dielectric gloves and mounting tools are vertical.

All. The elements of the test setup -

step-up transformer, regulating .reostat, automatic, as well as testing

wahn and milliammeter are

single: portable device.

Such an apparatus is especially convenient for objects that are remote from electrical laboratories, where special extraordinary inspections of insulating protective equipment are necessary because of the increased possibility of their deterioration (for example, in frost conditions, contact with oil insulating means, etc.), such as remote drilling rigs at sea or on land, etc.

Subject invention

An apparatus for testing the dielectric strength of insulating protective articles, e.g. gloves, comprising a housing 65 and a bath with an opening therein

for pouring and immersing products into it and an electrical apparatus unit interconnected, characterized in that, in order to be able to be used for testing differently configured products, it is equipped with at least two

panels mounted on the housing, the hole is made in the peripheral part of the end of the bath and is located respectively under one of the panels, and the bath is connected to the unit of electrical equipment made sockets.

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2S

30 27

i. Fig 5

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