How to use zinc oxide arrester tester
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1. Open the instrument cover and firmly ground the instrument case.
2. Insert one end of the arrester into the high voltage bushing of the instrument (H end) and clamp the other end with a wire clamp. Or use a special insulated wire to take the external test sample from the high pressure end.
3. Close the power switch. After the internal self-test of the instrument, the alarm light is on and the discharge light is on. The indication value of the two heads is zero ± 1 word.
4. Press the reset button, the alarm light will be off, and the instrument will enter the detection state and can be tested.
5. Press the test button for about 1 second and then release it. The instrument automatically completes all the test items of the MOA.
A common fault in thermal resistance is the short circuit and open circuit of the thermal resistance. The open circuit condition is even better, because the thermal resistance wire is thinner. The multimeter's “×1Ω†block can be used for the measurement. If the measured resistance is less than R, there may be a short circuit; if the multimeter indicates infinity, it can be concluded that the resistor is open. The short circuit of the resistor body is generally dealt with, as long as it does not affect the length and thickness of the resistance wire, find the short circuit to blow dry, and strengthen the insulation. The circuit breaker repair of the resistor body must change the length of the resistor wire and affect the resistance value, so a new resistor body needs to be replaced. If welding repair is used, the welding must be verified before it can be used.
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