2.2 Wiring
2-18
When connecting an earth leakage breaker, connect terminals R0, T0 to the output side of the earth
leakage breaker. When connections are made to the input side of the earth leakage breaker, the earth
leakage breaker will malfunction because the inverter input is 3 phase and the terminals R0, T0 are
single phase. When connecting to terminals R0, T0 from the input side of the earth leakage breaker,
make sure that the insulating transformer or the auxiliary B contact of the magnetic contactor is
connected as in the figure below.
Figure 2.2-13 Connection of the Earth Leakage Breaker
When connecting with a PWM converter, do not connect power source directly to the inverter's auxiliary
power input terminals (R0, T0) for control circuit. Insert an insulating transformer or the auxiliary B
contact of a magnetic contactor on the power supply side.
On connection examples for the PWM converter side, refer to the instruction manual for PWM
converters.
The R0, T0 terminals of older models may be directly connected to the power source. Exercise extra
caution when replacing an older model.
Figure 2.2-14 Example of Connection in Combination with PWM Converter
(8) Auxiliary power input terminals for fan R1, T1
The terminals are equipped on inverters of 37 kW or above in 200 V class series and 75 kW or above in 400 V
class series but are not used ordinarily.
Connect an AC power source when using direct current power supply input (such as in combination with PWM
converters).
Also switch the fan power source switching connectors "CN R", "CN W."
Terminal rating: 200 to 220 VAC/50 Hz, 200 to 230 VAC/60 Hz, maximum current 1.0 A (200 V series, 37 kW or
above)
380 to 440 VAC/50 Hz, 380 to 480 VAC/60 Hz, maximum current 1.0 A (400 V series, between
75 kW and 400 kW)
380 to 440 VAC/50 Hz, 380 to 480 VAC/60 Hz, maximum current 2.0 A (400 V series, 500 kW,
630 kW)
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