What are the common faults of power frequency voltage tester?
The power frequency withstand voltage test device is one of the common test equipments for carrying out AC voltage withstand test, but due to some external forces or improper operation, some common faults may occur:
Fault one: boot without any display
Analysis of the reasons: 1, the power is not connected 2, the instrument 20A fuse is not installed or open circuit
Solution: Turn on the power. If it is not the cause of the power supply, reinstall the fuse or replace the fuse. Replace the fuse. Replace the fuse of the same type.
Fault 2: The output voltage does not reach the rated value
Analysis of the reasons: 1, the input voltage does not match 2, the display has no current indication
Solution: Press the voltage on the nameplate; whether the value displayed is greater than the setting value
Fault 3: No current and voltage indication.
Analysis of the reasons: 1, the internal plug-ins loose equipment 2, the test circuit has open circuit failure
Solution: Check the equipment troubleshooting; check the test circuit to eliminate open circuit faults
The above faults are the most common occurrences of the power frequency withstand voltage test device in use. It is helpful to solve these minor faults in the test by grasping the analytical solutions.
The power frequency withstand voltage test device is connected to the 220V or 380V power frequency power supply, adjust the voltage regulator (that is, the input voltage of the test transformer), access the primary winding of the high voltage test transformer, according to the principle of electromagnetic induction, to obtain the required test High voltage voltage. Because of the high pressure, we must pay attention to the following safety issues when using it for the safety of the instrument and our own.
1. The housing must be reliably grounded during the test.
2. Do not allow irrelevant items to be stacked on and around the device panel during the test.
3, check the power supply voltage before starting: AC 220V ± 10% 50Hz.
4. When replacing fuses and accessories, use the same model as the instrument.
5, the instrument attention to moisture, anti-oil pollution.
6. During the test, please confirm that the device under test has been powered off and disconnected from other live devices.
7. Before starting up, please check if the output knob is in zero position.
Before we use any instrument, we must master its safety precautions. The same applies to power frequency voltage test equipment. Only in this way can we use it more safely.
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