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Application guidelines
26
FRCC.PC.014.A4.22
It is not necessary to perform a Hipot test (dielec-
tric withstand test) on frequency converters. This
has already been done during factory final test.
If a Hipot test has to be done anyway, following
instructions must be followed in order to not
damage the frequency converter:
• Compressor not connected
• L1, L2, L3, U, V, W terminals must be shorten
and connected to high voltage terminal of
the testing device.
• Ground terminal (chassis) must be connect-
ed to low voltage terminal of the testing
device.
• 2150VDC must be applied
• Ramp up time 3 seconds
• Full DC voltage must be established during
2 seconds
• The current leakage during the test must be
below 1mA
• Ramp down time to 0V in 25 seconds.
Electrical data, connections and wiring
Hipot test procedure
L1 L2 L3
91 92 93
U V W PE
96 97 98 99
NET
MOTOR
R- R+
81 82
01 02 03
- 24V + - DC +DC
35 36 88 89
MOTOR
NET
95
94
2 20 200 2000MOhm
+
-
20 ohm
M ohm
Gossen - ISOWID - 0413
M ohm
V
Ohm
On M Ohm 2000 M Ohm