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Work method of electronic release

A technology of electronic release and working method, which is applied in the direction of protection against overcurrent, etc., can solve problems such as imperfect protection function, complicated operation, and inflexible control of the release, and achieve large protection working range and high sensitivity. High, flexible control effects

Inactive Publication Date: 2012-02-15
广东天富电气股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the protection function of the existing release is not perfect, the control is not flexible, and the operation is complicated

Method used

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  • Work method of electronic release
  • Work method of electronic release

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Embodiment Construction

[0011] In this example, figure 1 As shown, the working method of the electronic release uses a current transformer for signal detection, which is essentially a current:voltage converter. Transform the primary high current into a very low output voltage to supply other links. It is required that its output voltage can faithfully reflect the law of input current changes in order to improve the accuracy of the action. For this reason, within the specified range of overload multiples, the input current and output voltage of the transformer should be proportional, that is, linear. To achieve this, the transformer is usually made of high-grade cold-rolled silicon steel sheet or high-permeability iron-nickel soft magnetic alloy, namely permalloy. After the signal is taken out, it is transformed into a DC voltage by a bridge rectifier circuit and a resistance-capacitance filter circuit, and then divided by a resistor, and the input signal is compared, and the signal is compared with...

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Abstract

The invention relates to a work method of an electronic release, which is characterized in that: a current transformer is used for detecting a signal and transforming primary large current to lower output voltage to be supplied to other links; after an output voltage signal is taken out, the low output voltage is transformed to direct-current voltage through a bridge-type rectifier circuit and a resistance-capacitance filter circuit; then the direct-current voltage is divided by a resistor to be inputted to a signal comparison link, and the signal comparison is realized by utilizing a silicon voltage-regulator tube or a unijunction transistor; when the signal voltage exceeds the breakdown voltage of the voltage-regulator tube or the peak voltage of a double-base junction transistor, the voltage-regulator tube or the double-base junction transistor is conducted, and a signal is outputted; and when a trigger is conducted, an armature of an electromagnetic-type release or an electromagnetic induction-type release is actuated, or the magnetic flux of a permanent magnet is weakened because of different polarities of conductive current, the armature on the release is released, and finally a traction rod is facilitated to move, and a circuit breaker is tripped. Due to the adoption of the work method of the electronic release, the safety of the circuit can be guaranteed, the protection function of the circuit breaker is gradually completed, and the circuit breaker is more flexible to control and is simpler and more convenient to operate. The sensitivity is high, and the protection work range is wide.

Description

technical field [0001] The invention relates to a working method of an electronic release. Background technique [0002] In the transmission, distribution and use of electric energy, circuit breakers are the most basic protective switching electrical components, occupy an extremely important position, and have a wide range of applications. They have almost completely replaced fuses in the fields of industrial, civil and building power distribution. The circuit breaker has two main functions: one is the switching function of starting and stopping the electrical equipment, and the other is the protection function of automatically cutting off the power supply when the line or electrical equipment is overloaded or short-circuited. The protection function is a very important function of the circuit breaker, and it is an important means to protect the electrical equipment and personal safety. The basic protection functions of the circuit breaker mainly include overload protection...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H3/08
Inventor 郭振清
Owner 广东天富电气股份有限公司
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