Installation and wiring Connection of stand-alone option units
FR-F800 2 - 75
2.8.7 Connection of the DC reactor (FR-HEL)
● Keep the surrounding air temperature within the permissible range (-10 °C to +50 °C). Keep
enough clearance around the reactor because it heats up. (Take 10 cm or more clearance on top
and bottom and 5 cm or more on left and right regardless of the installation direction.)
● When using the DC reactor (FR-HEL), connect it across terminals P/+ and P1.
For the FR-F820-02330(55K) or lower and FR-F840-01160(55K) or lower, the jumper connected
across terminals P/+ and P1 must be removed.
Otherwise, the reactor will not be effective.
● Select a DC reactor according to the applied motor capacity. (Refer to page 8-1.)
For the FR-F820-03160(75K) or higher, the FR-F840-01800(75K) or higher, always connect a DC
reactor.
● Since the DC reactor (FR-HEL) is electrically connected to the enclosure through mounting screws,
the DC reactor is earthed (grounded) by being securely mounted to the enclosure. However, if the
DC reactor is not earthed (grounded) securely enough, an earthing (grounding) cable may be
used.
When using an earthing (grounding) cable for FR-HEL-(H)55K or lower, wire the cable to the
installation hole where varnish is removed. For FR-FR-HEL-(H)75K or higher, use an earth (ground)
terminal to perform earthing (grounding). (Refer to the Instruction Manual of the FR-HEL.)
I002414E
Fig. 2-54: Clearances around the DC reactor (FR-HEL)
Fig. 2-55:
Connection of the DC reactor (FR-HEL)
I001040E
NOTES The wiring distance must be within 5 m.
As a reference, the cable gauge for the connection must be equal to or larger than that of the
power supply cables (R/L1, S/L2, T/L3) and the earthing (grounding) cable. (Refer to page 2-33.)
≥ 5 cm
≥ 10 cm
≥ 5 cm
≥ 5 cm
≥ 5 cm
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