Compliance West HT-3000P-1A-AC, Инструкция по эксплуатации

Страница: 9 / 23

3
Safety Techniques
The high voltage circuit of the HT-3000P-1A-AC can be shut off at any time by pressing
the RESET button. The HT-3000P-1A-AC has been provided with a Reset switch to provide an
unarmed "Standby" setting when it is energized, but idle. When the red RESET button is lit. The
tester will not provide high voltage until the RESET button and the TEST button have been
pressed in order. To prevent inadvertent operation, the operator should be instructed not to press
the RESET button until the test is ready.
The HT-3000P-1A-AC has been designed for one-touch operation with the right hand. If
possible, it should be set up to the left and in front of the equipment under test. The equipment
under test should be connected to the HT-3000P-1A-AC and then left alone by the operator.
After the operator is clear of the Tester and the equipment under test, he should press the
RESET Button, then the TEST Button, with his right hand. This will allow the greatest
separation between the operator and the test being conducted.
The HT-3000P-1A-AC is designed to bleed the high voltage away after the test has
concluded. In order to ensure that any voltage present in the equipment being tested has been
completely bled away, the operator should not unplug the equipment under test from the HT-
3000P-1A-AC until the front panel meter reads zero volts.
Using the HT-3000P-1A-AC Dielectric Withstand Tester
The dielectric withstand test involves high voltage and caution should be exercised when
using the tester. The tester's return lead is connected to ground potential and when properly
connected to the equipment being tested, it will guard against the operator contacting high
voltage. Always make sure the return lead is firmly connected to exposed dead metal.
Leakage Test
The HT-3000P-1A-AC leakage test uses a separate low-frequency circuit to check for
excessive leakage between primary power components and ground. There is not a specific
leakage current level pass/fail requirement at this time for most equipment, however, higher than
normal leakage current on a particular part may indicate an assembly or component problem in
the primary circuit.
The leakage current is also monitored by the HT-3000P-1A-AC to ensure that excessive
leakage does not keep the tester from developing full voltage required for the high voltage test.
The HT-3000P-1A-AC will provide full voltage at any leakage current level up to 1000 mA. The
leakage current trip level is adjustable on the front panel.
Excessive leakage current is not grounds for failure of the dielectric withstand test.
Leakage current is a normal result of capacitance in the primary circuit between neutral or line
conductors and ground. (In dielectric tests of some larger electric motors, leakage currents of as
high as 95 mA are considered acceptable by safety agencies.) However, leakage currents higher
than normally anticipated for a particular model should not be ignored. This indicates problems
of low resistance up to a short circuit between line/neutral and ground, and failures should be
investigated. Failure modes are discussed below.
If the green Full Voltage LED lights and the test continues, the leakage current was
below the amount set by the leakage adjust knob.