11.3 Peripheral Equipment
11-20
Table 11.3-2 lists the relationship between the rated leakage current sensitivity of RCDs/ELCBs (with
overcurrent protection) and wiring length of the inverter output circuits. Note that the sensitivity levels listed
in the table are estimated values based on the results obtained by the test setup in the Fuji laboratory
where each inverter drives a single motor.
Table 11.3-2 Rated Current Sensitivity of Residual-Current-Operated Protective Device (RCD)/ Earth Leakage
Circuit Breakers (ELCBs)
• Values listed above were obtained using Fuji ELCB EG or SG series applied to the test setup.
•
The rated current of applicable motor rating indicates values for Fuji standard motor (4 poles, 50 Hz
and 200 V).
• The leakage current is calculated based on grounding of the single wire for 200 V class delta
connection and neutral grounding for 400 V class Y-connection power lines.
• Values listed above are calculated based on the static capacitance to the earth when the 600 V class
of vinyl-insulated IV wires are used in a wiring through metal conduit pipes.
• Wiring length is the total length of wiring between the inverter and motor. If more than one motor is to
be connected to a single inverter, the wiring length should be the sum of the length of the wires to the
motors.
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