6.3 Insulation resistance test
・When testing an external circuit with a megger, disconnect all
the external circuit cables from the inverter to prevent it from
being 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.
・It is recommended the use of a DC500V megger® for the
insulation resistance test.
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.
・Before the main circuit test with a megger, remove the jumper
for switching the inverter's internal filter function, and then
connect terminals R, S, T, U, V, W, P, PD, N, RB, R0, and T0 by
wires as shown in the figure below. Subsequently, carry out the
test.
・After the test using the megger, remove the wires from
terminals R, S, T, U, V, W, P, PD, N, RB, R0, and T0, and connect
the jumper for switching the inverter's internal filter function
at the original position.
・Furthermore, depending on the model, the RB terminal may
not be present. Please confirm in “2.9 Wiring to the main
circuit terminal block”.
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