Low-power-consumption undervoltage tripper

An undervoltage release and low power consumption technology, which is applied in the direction of protection against undervoltage or no voltage, can solve problems such as undervoltage release misoperation, circuit breaker false opening, and imperfection. Achieve the effect of overcoming small starting torque, avoiding harmonic interference, and broadening the use occasions
CN104377645AInactive Publication Date: 2015-02-25CHANGZHOU INST OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHANGZHOU INST OF TECH
Publication Date
2015-02-25
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a low-power-consumption undervoltage tripper. The low-power-consumption undervoltage tripper comprises an electromagnet coil, an armature, a rectifying circuit, a step-down circuit, a relay, line voltage detection modules, a sampling circuit and a master control module. A nominal voltage Ue and a forced start voltage value are stored in the master control module, and the master control module is used for collecting the output voltage and the voltage period of each line voltage detection module so as to work out the effective value of each line voltage of a three-phase supply; when the effective values of all the line voltages of the three-phase supply reach 80% of the nominal voltage Ue at the same time and the sampling voltage of the sampling circuit reaches the forced start voltage value, the master control module controls a normally open contact to be closed and then controls a switching circuit to be closed, and after the armature is attracted, the master control module controls the normally open contact to be opened; if the effective value of any line voltage is lower than 50% of the nominal voltage Ue, the master control module controls the switching circuit to be opened.
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Description

[0001] This application is a divisional application of the invention patent application with the application number 201210227665.7, the application date is July 2, 2012, and the invention name is "an undervoltage release device with low power consumption and suitable for three-phase power supply". technical field

[0002] The invention relates to an undervoltage release device with low power consumption and suitable for three-phase power supply. Background technique

[0003] 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 (even slowly) to the rated operating Within the range of 70% to 35% of the voltage, the undervoltage release should act (the coil of the release is de-energized, and the movable armature in the coil is p...

Claims

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