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Several test methods of relay HKE
Categories:
relay HKE
Source:
Release time:
2022-10-08
①Measure the contact resistance: Use the electrical barrier of the multimeter to measure the resistance of the normally closed contact and the moving point, and the resistance should be 0; while the resistance of the normally open contact and the moving point is infinite. From this, it can be distinguished which is the normally closed contact of the relay HKE and which is the normally open contact.
②Measure coil resistance: You can measure the resistance of the relay HKE coil with a multimeter R×10 to determine whether there is an open circuit in the coil.
③Measure the pull-in voltage and pull-in current: Use an adjustable regulated power supply and an ammeter to input a set of voltages to the relay HKE, and connect an ammeter in series to the power supply loop for monitoring. Slowly increase the power supply voltage and record the pickup voltage and pickup current when you hear the relay HKE pickup sound. For accuracy, try averaging multiple times.
④Measure the release voltage and release current: It is also connected to the test as above. When the relay HKE is pulled in, gradually reduce the supply voltage. When the relay HKE is heard to release the sound again, record the voltage and current at this time, and also A number of attempts can be made to obtain an average release voltage and release current. Under normal circumstances, the release voltage of relay HKE is 10%~50% of the pull-in voltage. If the release voltage is larger (less than 1/10 of the pull-in voltage), it cannot be used normally, which will threaten the stability of the circuit and make Unreliable work.
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