88
2. INSTALLATION AND WIRING
2.8 Connection of stand-alone option units
2.8.8 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 to terminals P/+ and P1.
In this case, the jumper connected across terminals P/+ and P1 must be removed. Otherwise, the reactor will not be
effective. (The jumper is not installed for the FR-F820-03160(75K) or higher and the FR-F840-01800(75K) or higher.)
• Select a DC reactor according to the applied motor capacity (refer to page 638). For the FR-F820-03160(75K) or higher,
the FR-F840-01800(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 the FR-HEL-(H)55K or lower, wire the cable to the installation hole where
varnish is removed. (Refer to the Instruction Manual of the FR-HEL.)
For the FR-HEL-(H)75K or higher, use an earth (ground) terminal to perform earthing (grounding). (Refer to the Instruction
Manual of the FR-HEL.)
• 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 cables (R/L1, S/L2, T/L3)
and the earthing (grounding) cable. (Refer to page 53.)
10 cm or more
5 cm or
more
5 cm or
more
5 cm or
more
5 cm or
more
P1
FR-HEL
Remove
the jumper
P/+
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