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8 RECOMMENDED HIGH VOLTAGE DIELECTRIC WITHSTAND TESTING
(HI-POT TESTING)
WARNING! READ SAFETY WARNING ON PAGE 5 BEFORE ATTEMPTING
TO OPERATE. SEVERE INJURY OR DEATH CAN RESULT.
Testing agencies such as UL, CSA, etc., usually require that equipment undergo a hi-pot
test. In order to prevent catastrophic damage to the drive, which has been installed in the
equipment, the following procedure is recommended. A typical hi-pot test setup is shown in
Figure 19, on page 24.
All drives have been factory hi-pot tested in accordance with UL
requirements.
WARNING! ALL EQUIPMENT AC LINE INPUTS MUST BE DISCONNECTED
FROM THE AC POWER.
8.1 Connect all equipment AC power input lines together and connect them to the H.V.
lead of the Hi-Pot Tester. Connect the RETURN of the Hi-Pot Tester to the frame on
which the drive and other auxiliary equipment are mounted.
8.2 The Hi-Pot Tester must have an automatic ramp-up to the test voltage and an
automatic ramp-down to zero voltage.
Note: If the Hi-Pot Tester does not have automatic ramping, then the hi-pot output must
be manually increased to the test voltage and then manually reduced to zero. This
procedure must be followed for each machine being tested. A suggested Hi-Pot
Tester is Slaughter Model 2550.
CAUTION! Instantly applying the hi-pot voltage will cause irreversible damage to the
drive, which will void the warranty.
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