Mitsubishi FR-E520-0.1K-NA - Page 56

INSTALLATION AND WIRING
43
(
2
)
Selecting the rated sensitivity current for the earth leakage circuit
breaker
When using the earth leakage circuit breaker with the inverter circuit, select its rated
sensitivity current as follows, independently of the PWM carrier frequency:
Leakage current example of 3-phase
induction motor during commercial
power supply operation (200V 60Hz)
Cable size
(
mm
2
)
55
0.1
1.5 3.7
2.2
7.5 15 22
11
37
30 45
0.2
0.3
0.5
0.7
1.0
2.0
5.5 18.5
Leakage current (mA)
Motor ca
p
acit
y
(
kW
)
Example of leakage current per 1km in
cable path during commercial power
supply operation when the CV cable is
routed in metal conduit
(200V 60Hz)
0
20
40
60
80
100
120
3.5
5.5
822
30
38
60
80
100
150
Leakage current (mA)
214
!
Progressive Super series (Type SP, CF, SF, CP)
Rated sensitivity current: I
∆
n
≥
10
×
(lg1+Ign+lg2+lgm)
!
Conventional NV series (Type CA, CS, SS produced prior to
′
91)
Rated sensitivity current: I
∆
n
≥
10
×
{lg1+lgn+3
×
(lg2+lgm)}
lg1, lg2 : Leakage currents of cable path during commercial power supply operation
lgn* : Leakage current of noise filter on inverter input side
lgm : Leakage current of motor during commercial power supply operation
2