AC and DC contactor coil power consumption tester

Abstract

The invention discloses an AC / DC contactor coil power consumption tester. The AC / DC contactor coil power consumption tester includes a Hall voltage sensor, a Hall current sensor, an amplifying circuit, a data acquisition card, and a computer; The M terminal of the voltage sensor is connected to the 0th terminal of the data acquisition card; the M terminal of the Hall current sensor is connected to the 1st terminal of the resistor R1, and then connected to the input terminal of the amplifier circuit; the output terminal of the amplifier circuit is connected to the terminal of the data acquisition card The second terminal is connected; the output terminal of the data acquisition card is connected to the computer through the USB data cable, and the computer displays the parameters such as voltage, current, suction power consumption, and suction power consumption after data analysis of the collected digital signals.

Description

technical field [0001] The invention relates to an AC / DC contactor coil power consumption tester. Background technique [0002] The international standard IEC 60947-4-1:2012 (ed3.1) "Low-voltage switchgear and control equipment Part 4-1 Contactors and motor starters - Electromechanical contactors and motor starters" requires testing AC and DC contactors The power consumption of the control circuit is controlled in the pull-in and maintenance stages. The action process of the contactor is dynamic. The current in the pull-in stage is larger than the current in the hold stage, and the ratio can reach 10 times. At present, instruments that can directly measure power consumption include power testers and power analyzers, but if they are directly used to measure the power consumption of AC and DC contactor coils, there will be the following disadvantages: (1) Special power testers can only test static The power consumption value of the contactor, the entire pull-in process of the...

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