SU1339690A1 - Maximum-current tripping device - Google Patents

Abstract

The invention relates to electrical engineering. The aim of the invention is to increase the reliability of operation. The maximum current release contains a winding 1 installed on the core and a fixed magnetic core 2 with ears 3 for the axis 4 of the rotary core (ПЯ) 5. The axis 4 covers the spiral-wound ends 6 of the U-shaped loop 7 of the return spring. The free ends 8 of the return spring abut against the PU 5. An adjusting screw 9 passes through the top of the loop 7. The clamp 10 restricts the movement of the IL 5. 2 Il. 1 I G I I., / I 1 6. . Fig2

Description

The invention relates to electrical engineering, namely to the current release of circuit breakers, designed to protect against short-circuit currents without time delay.

The purpose of the invention is to increase the reliability of operation.

FIG. 1 shows the maximum current evaluator, general view; in fig. 2 - the same, top view.

The maximum current release contains a winding 1 installed on the core and a magnetic core 2 with races 3 for axis 4 of core 5. Axis 4 covers the spiral-wound ends 6 of the return spring loop 7. The free ends of the 8 spirals abut against the bark 5. The adjusting screw 9 passes through the vertex of the loop 7. The clamp 10 limits the stroke of the bark 5.

Maximum current release works as follows.

When current of an unacceptable multiplicity flows in the winding 1, the magnetic core 2 is magnetized to such an extent that the magnetic force of the turning core 5 exceeds the total elastic force of the loop 7, the spiral-wound ends 6 and the free ends 8. As a result, the rotary measur 5 rotates around axis 4 and affects the free-release mechanism of the circuit breaker. The setting of the opening effect of the breaker is carried out by measuring the magnitude of the opposing magnetic force. The total elastic force of the loop 7, the helix. 1 ends 6 and free ends 8. To do this, use the adjusting screw 9, screwing in which increases the response current, and unscrewing decreases it.

Due to the fact that the movable magma pipe is made in the form of a rotary core 5, and the spiral-wound ends 6 of the return spring encompass the axis 4 of the rotary core 5, the relative displacement of the free ends 8 of the return spring

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Composed by V. Konosov

Tehred I. VeresKorrektor I. Erdeyi

Circulation 697 Subscription

VNIIPI USSR State Committee for Inventions and Discoveries

and: U35, MOSCOW, F -35. Raushsk emb. D. 4/5 Production and printing company, Uzhgorod, st. Design. four

Editor I. Nikolaichuk Order 4233/45

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five

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five

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relative to the rotary core 5, it is insignificant, which makes it possible to reduce the amount of friction and wear of the rubbing parts and those m. by the most to increase the reliability of operation.

The implementation of the adjusting element in the form of a screw 8 mounted on a fixed magnetic core 2 and passing through the tip of the U-shaped loop 7 of the return spring ensures that the adjusting screw 8 does not move relative to the return spring, thereby reducing friction to a minimum and thereby increasing the reliability of operation trip unit The installation of the adjusting screw 8 on the fixed magnetic core 2 also makes it possible to reduce the mass of the movable magnetic core and, thereby, increase the reliability of the operation of the release during mechanical actions.

Claims (1)

Invention Formula The maximum current release of the circuit breaker, containing a winding, a fixed magnetic conductor, a movable magnetic conductor held by a return spring made of wire in the form of a G-shaped loop with spiral-wound ends and free ends, an adjusting element interacting with a return spring, characterized by that, in order to increase the reliability of operation, the movable magnetic core is made in the form of a rotary core, and a regul. the shrovochny element is made in the form of a screw, the return spring is set so that its spiral-wound ends cover the axis of the rotary core, and the free ends rest on the turn, whose measles, adjusting screw is installed on the stationary magnetic line and passes through) | at the U-shaped loop , at the same time U-shaped pet-. 1 and the free ends of the return spring are located on opposite sides of the axis of rotation of the rotary core.