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Chapter 6
6.3 Insulation resistance test
・ When performing a insulation resistance test, remove all cables
to external circuits and the components connected to the
terminals, to prevent it to be exposed to the test voltage.
・In the control circuit carry out a conduction test, use a
multimeter (with high resistance range), do not use a
megger® or buzzer /continuity tester.
・The insulation resistance test of the inverter itself is carried out
only at the main circuit, do not perform an insulation
resistance test in the control circuit.
・Is recommended the use of a DC500V megger® for the
insulation resistance test.
Power
Supply
Do not connect
into power supply
DC500V Megger®
6.4 Dielectric Withstand Test
・Do not carry out a withstand voltage test for the inverter. The
test may damage its internal parts, deteriorating the inverter.
・To perform an insulation resistance test of the inverter main
circuit, start by removing the inverter internal filter
short-circuit jumper, after that, R, S, T, U, V, W, P, PD, N, RB, R0,
T0 terminals are short-circuited with an electric cable as
shown in the sketch below.
・After the insulation resistance test, remove the cable
connected to R, S, T, U, V, W, P, PD, N, RB, R0, T0, and leave
the jumper of the filter as it was before.
・Furthermore, depending on the model, the RB terminal may
not be present. Please confirm in "Chapter 7 – Specification".
P
PD
N
R
S
T
Ground
Ground
terminal
terminal
R0
T0
Make sure to disable the EMC filter or
remove the filter jumper before testing.
6-3
Inspection and maintenance
Motor
RB
U
V
W
Do not connect the motor
M
3φ
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