Fuji Electric FRENIC-Ace series, User Manual

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11.3 Molded Case Circuit Breaker (MCCB), Residual-current-operated Protective Device
(RCD)/Earth Leakage Circuit Breaker (ELCB) and Magnetic Contactor (MC)
11-14
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)
Voltage class
Nominal applied
motor
(kW) [HP]
Wiring length and current sensitivity
10m (33ft) 30m (98ft) 50m (164ft) 100m (328ft) 200m (656ft) 300m (984ft)
Three-phase
200V class
0.1 [1/8]
0.2 [1/4]
0.4 [1/2]
0.75 [1]
1.5 [2]
2.2 [3] 30mA
3.7 [5]
5.5 [7.5]
7.5 [10] 100mA
11 [15]
15 [20]
18.5 [25] 200mA
22 [30]
30 [40]
37 [50]
45 [60]
55 [75]
75 [100] 500mA
90 [125]
110 [150]
Three-phase
400V class
0.4 [1/2]
0.75 [1]
1.5 [2]
2.2 [3]
3.7 [5] 30mA
5.5 [7.5]
7.5 [10]
11 [15]
15 [20]
18.5 [25]
22 [30]
30 [40] 100mA
37 [50] 200mA
45 [60]
55 [75] 500mA
75 [100]
90 [125] 1000mA
110 [150]
132 [200]
160 [250]
200 [300]
220 [350]
250 [400]
280 [450]
315 [475] 3000mA
355 [500]
400 [600]
450 [700]
500 [800]
630 [900]
• 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
three-phase).
• The leakage current is calculated based on 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 total length of wiring between the inverter and
motors.