11
High Voltage Dielectric Withstand Test
This test checks for insulation system breakdowns between the primary and ground circuits. The
HT-S uses a separate high-frequency transformer circuit to detect arc breakdowns.
The dielectric withstand test is conducted by shorting the line and neutral conductors of the power
supply cord and applying high voltage between them and the exposed dead metal of the chassis of the
equipment being tested. The duration of the test is controlled by the test time control on the back panel.
The test time is counted from the time the
Full Voltage
LED is lit to the completion of the test.
If the green
Hipot Pass
LED light is on, the test cycle has been successfully completed. The
equipment under test is in accordance with the preset test parameters. The HT-S is ready to test the next
piece of equipment.
High Voltage Dielectric Withstand Test Failures
If the red
Hipot Fail
LED light is on, a problem has been found with the insulation between
primary and ground. The equipment under test should be examined, reworked and successfully tested
before being shipped.
High Voltage Discharge
The HT-S is designed to discharge the high voltage after completion of the dielectric withstand
test. The equipment being tested should remain connected to the HT-S 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.
Testing Equipment with non-Standard Plugs or Pigtail Operation
The front panel of the HT-S is provided with a NEMA Type 5-15R receptacle, suitable for testing
cord-equipped single-phase products designed for use on a 15 amp branch circuit in North America. For
other types of products, a different receptacle type or pigtail leads may be required. Various adapters and
pigtail leads are available from Compliance West USA, or you can make your own, just make sure for the
correct configuration see the description of the outputs in the connections section. If tests of this type are
contemplated, call us for information.
