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WIRING
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Wiring
2.1.2 EMC filter
This inverter is equipped with a built-in EMC filter (capacitive filter) and common mode choke.
Effective for reduction of air-propagated noise on the input side of the inverter.
The EMC filter is factory-set to disable (OFF).
To enable it, fit the EMC filter ON/OFF connector to the ON position.
The input side common mode choke, built-in the 55K or lower inverter, is always valid regardless of on/off of the EMC
filter on/off connector.
The FR-A720-0.4K and 0.75K are not provided with the EMC filter ON/OFF connector. (The EMC filter is always valid.)
<How to disconnect the connector>
(1) Before removing a front cover, check to make sure that the indication of the inverter operation panel is OFF, wait
for at least 10 minutes after the power supply has been switched OFF, and check that there are no residual voltage
using a tester or the like. (Refer to page 6.)
(2) When disconnecting the connector, push the fixing tab and pull the connector straight without pulling the cable or
forcibly pulling the connector with the tab fixed. When installing the connector, also engage the fixing tab securely.
(If it is difficult to disconnect the connector, use a pair of long-nose pliers, etc.)
CAUTION
⋅ Fit the connector to either ON or OFF.
⋅ Enabling (turning on) the EMC filter increases leakage current. (Refer to page 53)
WARNING
While power is ON or when the inverter is running, do not open the front cover. Otherwise you may get an electric shock.
EMC filter OFF EMC filter OFF EMC filter OFFEMC filter ON EMC filter ON EMC filter ON
(initial setting) (initial setting) (initial setting)
EMC filter
ON/OFF
connector
VUW
3.7K or lower
5.5K, 7.5K
11K or higher
FR-A720-1.5K to 3.7K
FR-A740-0.4K to 3.7K
FR-A720-5.5K, 7.5K
FR-A740-5.5K to 7.5K
FR-A720-11K
FR-A740-11K, 15K
FR-A720-15K to 22K
FR-A740-18.5K to 22K
FR-A720-30K or higher
FR-A740-30K or higher
EMC filter
ON/OFF connector
(Side view)
Disengage connector fixing tab With tab disengaged,
pull up the connector straight.