Fuji Electric Frenic Mega Series - Connection Example and Criteria for Selection of Circuit Breakers

11.3 Peripheral Equipment
11-16
[2] Connection example and criteria for selection of circuit breakers
Figure 11.3-1 shows a connection example for MCCB or RCD/ELCB (with overcurrent protection) and MC
in the inverter input circuit. Table 11.3-1 lists the rated current and magnetic contactor format necessary to
select a circuit breaker. Table 11.3-2 lists the applicable grades of RCD/ELCB sensitivity.
Insert an MCCB or RCD/ELCB (with overcurrent protection) recommended for each inverter for its input
circuits. Do not use an MCCB or RCD/ELCB of a higher. Do not use an MCCB or RCD/ELCB of a
higher than that recommended.
Otherwise, a fire could occur.
Molded case circuit breaker or
residual-current-operated protective
device/earth leakage circuit breaker
Magnetic contactor
Figure 11.3-1 External Views of MCCB or RCD/ELCB and MC and Connection Example