Fuji Electric FRENIC-HVAC User Manual page 210

2) Connect the main circuit power supply wires (L1/R, L2/S and L3/T) to the input terminals of the
inverter via an MCCB or residual-current-operated protective device (RCD)/earth leakage circuit
breaker (ELCB)*, and an MC if necessary.
It is not necessary to align phases of the power supply wires and the input terminals of the
inverter with each other.
• When wiring the main circuit power lines of the 230 V class series inverters of 7.5 to 60
HP and 460, be sure to pass them through a ferrite core.
For 575V series, ferrite core is not required.
• To drive the inverter with single-phase input power, consult your Fuji Electric
representative.
• It is recommended to insert a manually operable magnetic contactor (MC) that allows you
to disconnect the inverter from the power supply in an emergency (e.g., when the
protective function is activated), preventing a failure or accident from causing secondary
disasters.
• When shielded wires are not used for the motor cable, remove the motor cable clamps to
prevent the cable covering from getting damaged, which makes the machinery or
equipment incompliant with the EMC standards. Wiring the inverter main power input
lines without passing them through a ferrite core also makes the machinery or equipment
incompliant with the EMC standards due to increase of noise generated by the inverter,
but it does not affect inverter basic operation.
Auxiliary control power input terminals R0 and T0
In general, the inverter runs normally without power supplied to the auxiliary control power input
terminals R0 and T0. If the inverter main power is shut down, however, no power is supplied to the
control circuit so that the inverter cannot issue a variety of output signals or display on the keypad.
To retain an alarm output signal ALM issued on inverter's programmable output terminals by the
protective function or to keep the keypad alive even if the main power has shut down, connect the
auxiliary control power input terminals R0 and T0 to the power supply lines. If a magnetic contactor
(MC) is installed in the inverter's primary circuit, connect the primary circuit of the MC to these
terminals R0 and T0.
Terminal rating:
200 to 240 VAC, 50/60 Hz, Maximum current 1.0 A (230 V class series of 25 HP or below)
200 to 230 VAC, 50/60 Hz, Maximum current 1.0 A (230 V class series of 30 HP or above)
380 to 480 VAC, 50/60 Hz, Maximum current 0.5 A (460 V class series)
575 to 600 VAC, 50/60 Hz, Maximum current 0.5 A (575 V class series)
When introducing a residual-current-operated protective device (RCD)/earth leakage circuit
breaker (ELCB), connect its output (secondary) side to terminals R0 and T0. Connecting its
input (primary) side to those terminals causes the RCD/ELCB to malfunction since the
input power voltage to the inverter is three-phase but the one to terminals R0 and T0 is
single-phase. To avoid such problems, be sure to insert an insulation transformer or
auxiliary B contacts of a magnetic contactor in the location shown in Figure 5.4.
5-10
* With overcurrent protection