44
Surge suppressors
• Ground fault interrupter:
Select a ground fault interrupter not affected by high frequencies. To prevent
malfunctions, the leakage current sensitivity should be 200mA or more and the
operating time 0.1 sec. or more.
Example:
" NV series by Mitsubishi Electric Co., Ltd. (manufactured in 1988 and
after).
" EGSG series by Fuji Electric Co., Ltd.(manufactured in 1984 and after).
• AC and DC reactor:
Install an AC reactor to connect to a power supply transformer of large capacity
(600kVA or more) or to improve power factor on the power supply side.
• Noise filter:
Use a noise filter exclusively for inverter if radio noise generated from the inverter
causes other control devices to malfunction.
NOTE: (1) Never connect a general LC/RC noise filter to the inverter output circuit.
(2) Do not connect a phase advancing capacitor to the I/O sides and/or a surge
suppressor to the output side.
(3) When a magnetic contactor is installed between the inverter and the motor,
do not turn it ON/Off during operation.
For the details of the peripheral devices, refer to the catalog.
Surge Suppressors
Coils and relays
Model
DCR2-
Specifications Code No.
200V
to
230V
Large size magnetic contactors 50A22E
250VAC
0.5µF 200Ω
C002417
Control relays
MY-2, -3 (OMRON)
HH-22, -23 (FUJI)
MM-2. -4 (OMRON)
10A25C
250VAC
0.1µF 100Ω
C002482
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