6-10
Table 6.6 lists the relationship between the rated leakage current sensitivity of GFCIs (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 6.6 Rated Current Sensitivity of Ground-Fault Circuit Interrupter (GFCIs)
1/8 0.68
1/4 1.4
1/2 2.3
13.6
2 6.5 30mA 200mA
39.2
515
7.5 22
10 29
1/2 1.2
11.8
23.3
3 4.6 200mA 500mA
57.5
7.5 11
10 14.5
1/8 0.68
1/4 1.4
1/2 2.3
1 3.6 30mA 200mA
26.5
39.2
100mA
Single-
phase
230 V
100mA
30mA 100mA
Power
supply
voltage
Three-
phase
230 V
Three-
phase
460 V
Applicable
motor
rating
(HP)
Rated current
of applicable
motor
(A)
33 ft
(10 m)
98 ft
(30 m)
Wiring length and current sensitivity
164 ft
(50 m)
328 ft
(100 m)
656 ft
(200 m)
984 ft
(300 m)
- Values listed above were obtained using Fuji GFCI 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 230
V 3-phase).
- The leakage current is calculated based on grounding of the single wire for 230V ' type and the neutral wire
for 460V Y type power lines.
- Values listed above are calculated based on the static capacitance to the earth when the 600V class of
vinyl-insulated IV wires are used in a metal conduit laid directly on the earth.
- 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.
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