RU157514U1 - ELECTROMAGNETIC CIRCUIT BREAKER OF SHORT CIRCUIT OF THE AUTOMATIC CIRCUIT BREAKER - Google Patents

Abstract

An electromagnetic short-circuit current release of a circuit breaker, comprising a magnetic circuit, a magnetizing coil of an electromagnet located on a coil and configured to act on an emergency shutdown rail, an armature, characterized in that it is provided with a spring compression force adjustment unit located in its upper part, wherein the adjustment unit spring compression force consists of a cylindrical guide made at the same time with the electromagnet coil with ozhnostyu counteract displacement compression spring anchor adapted to change the spring force of the adjusting nut and the Belleville washer with the guide, wherein the core is made of a soft magnetic material, the electromagnet coil is made of plastic electrical and armature is disposed with its top of the thread.

Description

Electromagnetic circuit breaker

The utility model relates to low-voltage apparatus engineering, in particular to automatic circuit breakers with natural air cooling and direct manual control, designed to protect electrical circuits from overloads and short circuits, including for starting, protecting and disconnecting electric motors.

Known release of the maximum current of the circuit breaker according to the patent of the Russian Federation for utility model No. 33461, containing a magnetic circuit with a winding, an armature that interacts with a pusher that acts on the rail of the free trip mechanism.

A disadvantage of the known solution is the inability to adjust the opposing force of the return spring, which is selected empirically in the manufacturing process of the release.

The technical task of the claimed utility model is to create a device that provides a safe and timely adjustment of the opposing force of the return spring.

The technical result is to increase the reliability of the electromagnetic release by increasing the accuracy of operation.

The electromagnetic short circuit current release of the circuit breaker is illustrated by drawings, where:

in FIG. 1 shows an assembly for adjusting a compression force of a spring of an electromagnetic release;

in FIG. 2 shows a structural diagram of the circuit breaker nodes, where:

1 - magnetic circuit;

2 - electromagnet winding

3 - an anchor of an electromagnet;

4 - cylindrical guide;

5 - coil of an electromagnet;

6 - spring;

7 - an adjusting nut;

8 - a disk washer with a guide;

9 - rail emergency shutdown;

10 - tire;

11 - thermal release;

12 - terminal screw;

13 - power fixed contact;

14 - lattice arcing chamber;

15 - power movable contact;

16 - platoon / trip mechanism;

17 - power button;

18 - power button .;

The force of the anchor of the release electromagnet, necessary for the triggering of the free trip mechanism, is due to the following factors:

- the magnitude of the current flowing through the magnetizing winding of the electromagnet;

- the number of turns of the magnetizing winding;

- magnetic properties of the magnetic circuit;

- the magnitude of the counteracting force of the return spring.

The technical problem is achieved due to the fact that the electromagnetic short-circuit current release of the circuit breaker, comprising a magnetic circuit, the magnetizing coil of the electromagnet located on the coil and configured to impact the emergency shutdown rail, has an armature located in its upper part for adjusting the compression force of the spring, while the unit for adjusting the compression force of the spring consists of a cylindrical guide integral with the electromagnet coil and mounted on it and made with the possibility of counteracting the movement of the anchor of the compression spring, made with the possibility of changing the force of the spring of the adjusting nut and the disk washer with a guide, and the magnetic circuit is made of soft magnetic material, the electromagnet coil is made of electrotechnical plastic, and the anchor is located in its upper part carving.

The electromagnetic short circuit current release of the circuit breaker consists of:

- magnetic circuit 1 of soft magnetic material;

- the magnetizing winding of the electromagnet 2, placed on the coil of the electromagnet 5 of electrotechnical plastic, and the armature of the electromagnet 3 with a thread in the upper part;

- located in the upper part of the release of the unit for adjusting the compression force of the spring, consisting of a cylindrical guide 4 made at the same time with the coil of the electromagnet 5, the compression spring 6, the adjusting nut 7 and the disk washer with the guide 8.

Moving the adjusting nut 7 along the thread of the armature of the electromagnet 3 allows you to smoothly change the force of the spring 6, which counteracts the movement of the armature of the electromagnet 3, thereby providing accurate adjustment of the moment of operation of the electromagnetic release in accordance with a given time-current characteristic.

The electromagnetic short circuit current release of the circuit breaker operates as follows (Fig. 2):

When a current flows through the winding of electromagnet 2, the value of which is equal to or greater than the set current, the armature of electromagnet 3 is drawn into the coil of electromagnet 5 and, with its lower end, acts on the emergency shutdown rail 9.

The emergency shutdown rail 9 is deployed on the axis, the free trip mechanism is triggered.

Power movable contacts 15 move away from the stationary 13, the arcing arc is crushed in the lattice 14 of the arcing chamber, the arc goes out. Through the winding of the electromagnet 2, the flow of current stops, the armature of the electromagnet 3 under the influence of the compression spring 6 returns to its original position.

Thus, the claimed technical solution due to the introduction of a node for adjusting the compression force of the spring allows you to accurately adjust the response time of the electromagnetic release in accordance with the stated current characteristics.

Claims (1)

An electromagnetic short-circuit current release of a circuit breaker, comprising a magnetic circuit, a magnetizing coil of an electromagnet located on a coil and configured to act on an emergency shutdown rail, an armature, characterized in that it is provided with a spring compression force adjustment unit located in its upper part, wherein the adjustment unit the compression force of the spring consists of a cylindrical guide made at the same time as the electromagnet coil with it mounted on it and made with ozhnostyu counteract displacement compression spring anchor adapted to change the spring force of the adjusting nut and the Belleville washer with the guide, wherein the core is made of a soft magnetic material, the electromagnet coil is made of plastic electrical and armature is disposed with its top of the thread.

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