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What is the resistance of the 5p’s beautiful air-to-air thermal overload protector? How to judge whether it is good or bad?

Asked by: Wilson 173 views Hardware August 22, 2018

What is the resistance of the 5p's beautiful air-to-air thermal overload protector? How to judge whether it is good or bad?

1 Answers

  1. +1Votes  

    The thermal relay is an overload protection device, mostly for three-phase use. You can use the multimeter resistance file *100 or *1K or use the diode file to measure whether the main circuit terminal is open. If there is one or more open circuit conditions, it will be Bad, otherwise it is normal, but also to see if the normally closed contact is normal, it is closed under normal conditions (it has a manual button, you can press it by hand to see if the action is the normally closed contact is broken), when When the load current exceeds the rated current of the thermal relay, it will automatically open, causing the load contactor coil to lose power and disconnect the protection load.

    The overload protector mainly looks at whether the contact at the control end is in a normal state. If not, it means that it is broken.

    Maria Evans- August 22, 2018 |