RU84963U1 - DEVICE FOR MEASURING RELAY CONTACT WEAR - Google Patents

Abstract

A device for measuring the wear of relay contacts, comprising a frame with at least one bracket for mounting a linear displacement indicator and a test relay, an electrical circuit for connecting to a test relay, characterized in that the frame is made in the form of a tripod, on a vertical rack through which a bracket with a console and a clamp as a linear displacement indicator is equipped with a micrometer, mounting holes for mounting the relay under study are made on the horizontal base of the tripod, an electric circuit The circuit contains a low voltage power source and an LED, one of whose contacts are connected in series with each other through an electric wire, and the other two contacts of which are each connected to its own electric wire.

Description

A device for measuring the wear of relay contacts relates to indicator devices, can be used to determine the failure of contacts as a result of wear during tests for switching wear resistance at enterprises operating and repairing electrical equipment.

An indicator device is known, described in USSR author's certificate No. 177632, published on December 18, 1965, in which the indicator is mounted on a movable element, and its probe abuts against a fixed rod / pin passing through the slot of this element.

The disadvantages of the described analogue are inconvenience in operation and design complexity.

The closest analogue, selected as a prototype, is a device for measuring the wear of power contacts of magnetic starters described in the patent for utility model of Russia No. 19321, published on 08/20/2001. The known device contains an electrical circuit for connecting the device to a magnetic actuator, an indicator head, rigidly mounted in a housing with two brackets for attaching to the housing of a magnetic actuator, each of which is made with two threaded holes and with screws.

This device is made with a complex electrical circuit with connection to an AC network. The disadvantages of this device are: low measurement accuracy due to the difficulty of installing the measuring head perpendicular to the movable contact, and also due to the fact that the incandescent lamps used in the electrical circuit have a decay time; low reliability due to the use of incandescent lamps.

The technical task of the claimed utility model is to eliminate these drawbacks, and namely, improving the accuracy of measurements and increasing reliability.

The technical result of the claimed utility model is achieved by the fact that in the device for measuring wear of relay contacts, containing a frame with at least one bracket, for installing a linear displacement indicator and the relay under study, an electrical circuit for connecting to the relay under study, according to the utility model, is a frame made in the form of a tripod, on a vertical stand of which, through a movable bracket with a console and a clamp, a micrometer is installed as an indicator of linear movements, on the horizontal base of the tripod The mounting holes for installing the relay under study are filled, the electric circuit contains a low voltage power source and an LED, one of whose contacts are connected in series with each other through an electric wire, and two other contacts, each of which are connected to its own electric wire.

Due to the fact that the frame is made in the form of a tripod on a vertical rack, a micrometer is installed as a linear displacement indicator through a movable bracket with a console and a clamp, mounting holes for installing the relay under study are made on the horizontal base of the tripod, the electrical circuit contains a low voltage power supply and an LED , some contacts of which are connected in series with each other by means of an electric wire, and two other contacts, each of which are connected to its own electric wire, increases the accuracy of measurements and the reliability of the device.

Thus, the combination of the claimed features has improved the accuracy of measurements and the reliability of the device.

The inventive device for measuring wear of relay contacts has a novelty, differing from the prototype of the above features, and ensures the achievement of the technical result perceived by the applicant.

The inventive device for measuring the wear of relay contacts can be widely used in enterprises associated with the repair and maintenance of electrical equipment, therefore, meets the criterion of "industrial applicability".

The essence of the device for measuring the wear of relay contacts is illustrated by drawings, which show:

figure 1 - General view of a device for measuring wear of relay contacts;

figure 2 is a top view of a device for measuring wear of relay contacts;

figure 3 is an electrical diagram.

The device for measuring the wear of the relay contacts consists of a tripod 1, containing a vertical rack 2 and a horizontal base 3. An bracket 4 is mounted on a vertical rack 2, consisting of a sleeve 5, mounted to move along the rack 2 up and down and the console 6. Console 6 one the end is fixedly mounted in the sleeve 5 perpendicular to the vertical rack 2 of the tripod 1, a clamp 7 is installed on the second end of the console 6. A clamp 8 is mounted in the clamp 7 to the bracket 9. The meter 8 is made with a movable measuring rod 10 and opposite a fixed measuring rod 11, with a ratchet 12. The electrical circuit includes a low voltage power supply 13 with one contact connected in series with an electric wire 14 with one of the contacts of the LED 15. An electric wire is connected to the other contact of the source 13. An electric wire is connected to the other contact of the LED 13 The electrical circuit is located next to the horizontal base 3. On the horizontal base 3, mounting holes 18 are provided for fixing the studied relay 19, for example, wines tami 20 (relay 19, screws 20 are not included in the device).

The operation of the device for measuring the wear of relay contacts is as follows. Relay 19 is fastened firmly with screws 20 to the horizontal base 3 of tripod 1 in the holes 18. The bracket 4 of the tripod 1 is fastened with a micrometer 8 clamped in a clamp 7, and the micrometer 8 should be located along the console 6, lowered to the level of the carriage 21 of the relay 19, on which are rigidly mounted movable contacts 22. The carriage 21 together with the movable contacts 22 is mounted in the housing 23 with the possibility of swinging on two axes 24 in two coaxial holes 25. The fixed measuring rod 11 is installed with emphasis on the housing 23 of the relay 19 while the movable measuring rod 10 are set opposite the carriage 21.

In the electric circuit, the low voltage power supply 13 is connected to the movable contact 22 by an electric wire 16, the LED 15 is connected to the fixed contact 26 by an electric wire 17. After installation, we begin to rotate the ratchet 12 of micrometer 8, the movable measuring rod 10 moves the carriage 21 of the relay 19 and contacts 22, 26 are closed, at the moment the contacts 22, 26 are in contact, the LED 15 lights up, in this position we fix the first reading of the micrometer 8, continue the rotation of the ratchet 12 until it stops and take the second reading of the micrometer 8 this position. The difference between the first and second readings of micrometer 8 is a failure of contacts 22, 26, i.e. the distance that one contact has moved in the closed position relative to the other due to uneven wear on the contact surface.

The inventive device for measuring the wear of relay contacts is characterized by increased measurement accuracy and increased reliability due to the fact that the frame is made in the form of a tripod, on a vertical rack of which a micrometer is installed as a linear displacement indicator through a movable bracket with a console and a clamp, and mounting brackets are made on the horizontal base of the tripod holes for installing the studied relay, the electrical circuit contains a low voltage power source and an LED, one contact of which is The main wires are connected in series with each other, and two other contacts, each of which are connected to its own electric wire.

Claims (1)

A device for measuring wear of relay contacts, comprising a frame with at least one bracket for mounting an indicator of linear displacements and a test relay, an electrical circuit for connecting to a test relay, characterized in that the frame is made in the form of a tripod, on a vertical rack through which a bracket with a console and a clamp as a linear displacement indicator is equipped with a micrometer, mounting holes for mounting the relay under study are made on the horizontal base of the tripod, an electric circuit The circuit contains a low voltage power source and an LED, one of whose contacts are connected in series with each other through an electric wire, and the other two contacts of which are each connected to its own electric wire.