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Trip Units for Circuit Breakers

A circuit breaker and tripper technology, applied in the field of trippers, can solve problems such as undetectable overheating and high cost

Active Publication Date: 2019-05-07
SCHNEIDER ELECTRIC IND SAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of electronic overload release cannot detect overheating caused by poor internal and external connections of the circuit breaker, and it has a high cost due to the use of electronic devices

Method used

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  • Trip Units for Circuit Breakers
  • Trip Units for Circuit Breakers
  • Trip Units for Circuit Breakers

Examples

Experimental program
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Effect test

Embodiment Construction

[0017] Various embodiments of the present disclosure will now be described in detail, by way of example only.

[0018] figure 1 is a schematic diagram of a trip unit according to an embodiment of the present invention. The trip unit forms part of the circuit breaker. The release includes a connecting conductor 1 for connecting with the working circuit of the circuit breaker. Specifically, one end of the connection conductor 1 can be used as a connection terminal of the circuit breaker for the user to connect to the working circuit, and the other end thereof is electrically connected to a contact of a switch of the circuit breaker. exist figure 1 In the illustrated embodiment, the wiring conductor 1 is a customer wiring copper bar of a circuit breaker.

[0019] The release also includes a current transformer coil 2, which is arranged around the connection conductor 1, thereby forming a current transformer. When an alternating current passes through the connecting conductor...

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PUM

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Abstract

An embodiment of the invention relates to a release used for a breaker. The release includes: a wiring conductor (1) used for being connected with a working circuit of the breaker a current mutual inductance coil (2) which is arranged around the wiring conductor (1); and a thermal release mechanism and / or magnetic release mechanism (3) which has a current leading element (4) electrically connected to the current mutual inductance coil (2), wherein the thermal release mechanism and / or magnetic release mechanism (3) is configured to act based on a current sensed by the current mutual inductance coil (2) to enable releasing of the breaker. The release can be used for a large-rated-current occasion, and releases of different rated currents can be manufactured in a standardized manner.

Description

technical field [0001] Various embodiments of the present disclosure relate to the field of circuit breakers, and in particular to trip units of circuit breakers. Background technique [0002] The thermal magnetic release is the component of the circuit breaker to realize the overload and short circuit protection functions. The circuit breaker composed of it is very popular among users because of its excellent cost performance. The working principle of the thermal protection in the usual thermal magnetic release is: when the normal current passes through the line, the heating element generates heat to make the bimetal bend to a certain extent (just touching the transmission mechanism) and reach a dynamic equilibrium state, the bimetal Do not continue to bend. If there is an overload phenomenon, the current in the line will increase, which will increase the heat generation of the heating element and cause the bimetal to continue to bend, and the free release mechanism will b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H71/42H01H71/40H01H71/14H01H71/24
Inventor 刘振忠
Owner SCHNEIDER ELECTRIC IND SAS