Connection of stand-alone option units
INSTALLATION AND WIRING
79
2
2.9.8 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-A820-03160(55K) or lower and FR-A840-01800(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 690.) For the FR-A820-03800(75K) or higher,
the FR-A840-02160(75K) or higher, and when a 75 kW or higher motor is used, 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-HEL-(H)75K or higher, use an earth (ground) terminal to perform earthing (grounding). (Refer to the
Instruction Manual of the FR-HEL.)
NOTE
• 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 41.)
10cm or more
5cm or
more
5cm or
more
5cm or
more
5cm or
more
P1
FR-HEL
Remove
the jumper
P/+
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