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Under-voltage and over-voltage two-way release

A tripper and overvoltage technology, applied in the field of trippers, can solve the problems of inability to achieve overvoltage tripping, large coil heat generation, small starting torque, etc., and achieve reliable pull-in, small coil heat generation, and starting torque. big effect

Active Publication Date: 2014-11-05
JIANGSU GUOXING ELECTRIC EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: in order to overcome the problems of large coil heat generation, small starting torque, frequent non-adhesion phenomenon, and overly complicated circuit when the existing electromagnetic undervoltage release is in normal operation, especially the inability to realize overvoltage release Overvoltage tripping and other technical problems, the present invention provides an undervoltage, overvoltage bidirectional release

Method used

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  • Under-voltage and over-voltage two-way release
  • Under-voltage and over-voltage two-way release

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Embodiment Construction

[0035] The present invention is described in further detail now in conjunction with accompanying drawing. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, so they only show the configurations related to the present invention.

[0036] Such as figure 1 As shown, the circuit principle diagram of Embodiment 1 of the undervoltage and overvoltage bidirectional release of the present invention. EMC circuit 1, step-down capacitor CK, bridge rectifier circuit BG, starting capacitor CS1, SB signal sampling circuit for detecting the voltage of starting capacitor CS1, SA signal sampling circuit for detecting grid voltage, regulated power supply circuit 2, single-chip microcomputer circuit 3 and The switch circuit 5 for controlling the on-off of the electromagnet 4 is composed. The EMC circuit 1 bidirectionally suppresses the interference signals from the power grid and the trip unit. Before ...

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PUM

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Abstract

The invention relates to the field of releases, in particular to an under-voltage and over-voltage two-way release, which comprises a filter circuit, a starting power circuit, an electromagnet for releasing control, a switching circuit, a control circuit for controlling the turn-on / off of the switching circuit, and a regulated power circuit for supplying power to the switching circuit and the control circuit, wherein the power input end of the filter circuit is connected with a power grid, and the power output end of the filter circuit is connected with the power input end of the starting power circuit; and the power output end of the starting power circuit, the switching circuit and a coil of the electromagnet form a series loop. The under-voltage and over-voltage two-way release is simple, high in starting torque, reliable in closing and low in coil heat, and can be used for realizing under-voltage and over-voltage two-way releasing.

Description

technical field [0001] The invention relates to the field of releases, in particular to an undervoltage and overvoltage bidirectional release. Background technique [0002] The undervoltage release is one of the important components of circuit breakers, especially frame circuit breakers. The undervoltage release is a release that makes the circuit breaker disconnect with or without delay when its terminal voltage drops to a certain range. When the power supply voltage drops, it even slowly drops to the rated working voltage. Within the range of 70% to 35% of the release, the undervoltage release should operate. When the power supply voltage of the undervoltage release is equal to 35% of the rated operating voltage of the release, the undervoltage release should be able to prevent the circuit breaker from fully closing. The coil of the release is de-energized, and the movable armature in the coil is ejected by the return spring—tripping; when the power supply voltage is equa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H3/24H02H3/20
Inventor 吴志祥方晓毅黄波蒋国良
Owner JIANGSU GUOXING ELECTRIC EQUIP