Hitachi SJ300 - Manual (Page 32)

5- 3
5.3 Megger test
Disconnect all the wiring in case of megger test on external circuit, so that no test voltage is supplied to the inverter.
Use tester (high resistance range) for the test of control circuit. Do not use megger nor buzzer.
Megger test should be done only on the power (mains) portions. Do not perform megger test on control circuits.
(Use DC500V megger in case of megger test.)
In case of megger test on power terminals, disconnect short circuit material at connector “J61” located close to R0T0 terminal,
and connect R, S, T, PD, P, N, RB, U, V and W all together. Connect again the short circuit material to J61 after the test is
done.
5.4 Withstand voltage test
Do not perform withstand voltage test.
Semiconductors that are used in inverter can be degraded when withstand voltage is performed.
IM
R
S
T
U
V
M
P P N R
J61
Earth terminal
Power supply
Motor
Be sure to disconnect the short circuit
material for the megger test.
DC500Vmegger
There must be no
power supply
connected
There must be no
connection to the motor.