Compliance West HT-10KVDC, Instruction Manual

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16
Setting the Voltage Ramp Switch
The Voltage Ramp switch; item 13, is used to ramp up the voltage, or to immediately apply full
high voltage to the circuit being tested.
When this switch is in the DEFEAT position, the voltage will immediately rise to the level set by
the Voltage knob; item 10. The Ramp Time setting; item 14, is ignored.
When this switch is in the ON position, the voltage ramps according to the setting of the Ramp
Time control; item 14. See adjustment instructions above.
The Voltage Ramp must be DEFEAT if Failure Shutdown Defeat is desired. See Table 3-3 for
details.
Setting the Test Timer Switch
The Test Timer Switch; item 13, allows test time to be controlled by the HT-10KVDC's internal
timer or to continue until terminated by the operator.
When this switch is in the DEFEAT position, the test will continue only while the TEST button;
item 2, is pushed. The minimum test time is approx. 1 second.
When this switch is in the ON position, the test time will be controlled by the HT-10KVDC's
internal timer. For information on how to set this time, see instructions above.
The Test Timer must be defeated if Failure Shutdown Defeat is desired. See Table 3-3 for
details.
Setting the Failure Shutdown Switch
The Failure Shutdown Switch; item 21, allows the operator to continue testing after a failure is
encountered. This allows the operator to find a breakdown point, but
all safety shutdown
circuitry in the HT-10KVDC is disabled when the Failure Shutdown switch is in the
DEFEAT position
. Tests may be terminated at any time by pressing the RESET button.
When the Failure Shutdown switch is in the DEFEAT position, the test continues while the
TEST button; item 2, is held down (minimum duration 1 second). This allows the operator to
find insulation breakdowns easily.
When the Failure Shutdown switch is in the ON position, the HT-10KVDC will stop the test
when excessive leakage or a high voltage arc is detected. Leave the Failure Shutdown switch in
the ON position for normal testing.
WARNING: Testing with the Failure Shutdown switch in the DEFEAT position is
extremely hazardous. The HT-10KVDC can generate lethal levels of voltage and current.
Therefore, care should be taken in examining the equipment being tested to locate areas of
failure while the HT-10KVDC is operating. Do not operate the HT-10KVDC for extended
periods under conditions of excess leakage or dielectric failure, as overheating and/or
damage to the equipment being tested may result.
Operating Techniques
The following paragraphs describe how to operate the HT-10KVDC Dielectric Withstand Tester.
CAUTION
High voltage is generated by the HT-10KVDC. Although the chassis of the equipment
under test is grounded by the HT-10KVDC, a risk of shock exists. Exercise care when
using the HT-10KVDC.