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Sporadic Leakage Current Failures
If the red Excess Leakage LED lights, the buzzer sounds, and the test is terminated, the
leakage current delivered to the equipment being tested was over the amount set by the leakage
adjust knob. If other equipment of the same type routinely passes this test, there may be a
problem, the unit should be checked and reworked if necessary.
Chronic Leakage Current Failures
AC Dielectric Withstand testing charges all primary circuit capacitors connected line to
ground or neutral to ground. The current flowing through these capacitors is defined as leakage
current. If almost all examples of a model of equipment are not passing the leakage current test,
we recommend that the leakage current limit be increased by resetting the leakage current level
on the rear panel to a higher level.
If the leakage current adjustment of the HT-3000P-1A-AC is set to 1 A and almost all the
samples of the model being tested are still failing, the primary circuit capacitance of the
equipment may be too high to allow the AC dielectric withstand test to be used. This is due to the
AC voltage charging all capacitors connected between primary voltage and ground. If the overall
value of these capacitors produce a leakage current of more than 1 A to flow at the desired test
voltage, the HT-3000P-1A-AC cannot generate full voltage, and cannot successfully conduct the
dielectric withstand test.
However, a DC dielectric withstand test is acceptable for most categories of equipment
and will not cause leakage through the primary circuit capacitors. A DC voltage dielectric
withstand tester, may allow successful test of models chronically failing the HT-3000P-1A-AC
leakage current test.
High Voltage Discharge
The HT-3000P-1A-AC is designed to discharge the high voltage after completion of the
dielectric withstand test. The equipment being tested should remain connected to the HT-3000P-
1A-AC until the voltage has discharged to a safe level to protect the operator and also to ensure
that there is no energy stored in the tested equipment.
Summary of Contents for HT-3000P-1A-AC
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