AVTM6514J Rev. A (03/2003)
25
that the fault can be isolated. Be sure to read and understand Section 2, Safety, before
operating the Impulse Generator.
1. Choose a safe test site as described in Section 5.
2. Connect the low-voltage lead (black boot) of the HV OUTPUT cable to a secure
low-resistance ground.
3. Connect the high-voltage lead (red boot) of the HV OUTPUT cable to the same
ground as the output low-voltage lead.
4. Plug the AC INPUT cable into a standard 120/240 V ac socket. Set the OUTPUT
KILOVOLTS switch to ZERO START, and turn on the circuit breaker. The fan
starts and the POWER lamp lights.
F
WARNING
The high-voltage output circuits have now been enabled and
high voltage will be present hereafter.
5. Set the OUTPUT KILOVOLTS switch to 15 kV, one step at a time. Note that the
following OUTPUT CURRENT meter deflections occur every six seconds at each
output position:
3 kV
20%
6 kV
40%
9 kV
60%
(percentages are approximate)
12 kV 80%
15 kV 100%
6. Return the OUTPUT KILOVOLTS switch to ZERO START, and set the
ON/OFF switch to OFF.
TROUBLESHOOTING AND REPAIR
The Impulse Generator is designed for reliability and should give years of trouble-free
operation. If a malfunction occurs, Megger maintains a complete repair service and
recommends its customers take advantage of this service. However, the problem can
often be located with a few simple checks made by a technician using only a VOM
multimeter. Repairs may be made in the field using components available from Megger.
Refer to Section 9, Replaceable Parts List.
If the Impulse Generator fails to operate properly, the following troubleshooting guide
will be useful in determining the cause of the malfunction. It notes possible equipment
malfunctions as observed during operation or checkout and suggests the possible cause
and the means of identifying the defective component. See Figure 2 for help in locating
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