Mitsubishi Electric FR-E500 Instruction Manual page 58

<Example>
Note: 1. The earth leakage circuit breaker should be installed to the primary (power
supply) side of the inverter.
2. Ground fault in the secondary side of the inverter can be detected at the
running frequency of 120Hz or lower.
3. In the connection neutral point grounded system, the sensitivity current
becomes worse for ground fault in the inverter secondary side. Hence, the
protective grounding of the load equipment should be class D grounding (10Ω
or less).
4. When the breaker is grounded on the secondary side of the inverter, it may be
unnecessarily operated by harmonics if the effective value is less than the
rating. In this case, note that the eddy current and hysteresis loss increase
and temperature rises.
* For the leakage current value of the noise filter installed on the inverter input
side, contact the corresponding filter manufacturer.
Leakage current (Ig1)
Leakage current (Ign)
Leakage current (Ig2)
Motor leakage
current (Igm)
Total leakage current
Rated sensitivity current
( ≥ Ig × 10)
× 5m × 70m
5.5mm 5.5mm
2 2
(16.40 feet) (229.66 feet)
NV Noise filter
Inverter
Ig1 Ign Ig2
Progressive Super series
(Type SP, CF, SF, CP)
33 ×
33 ×
2.66
45
INSTALLATION AND WIRING
3φ
IM
200V 2.2kW (3HP)
Igm
Conventional NV
(Type CA, CS, SS)
5m (16.40 feet )
1000m (3280.80 feet)
0 (without noise filter)
70m (229.66 feet )
1000m (3280.80 feet)
0.18
30
= 0.17
= 2.31
7.64
100
2