Mitsubishi Electric FR-E520 Instruction Manual page 62

<Example>
Note: 1. The earth (ground) leakage circuit breaker should be installed to the primary
(power supply) side of the inverter.
2. Earth (ground) fault on the secondary side of the inverter can be detected at
the running frequency of 120Hz or lower.
3. In the
current becomes worse for earth (ground) faults on the inverter secondary
side. Hence, the protective earthing (grounding) of the load equipment should
be 10Ω or less.
4. When the breaker is installed 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, do not install the breaker since the eddy current, hysteresis
loss, and the temperature all increase.
5. General products indicate the following models.
BV-C1, BC-V, NVB, NV-L, NV-G2N, NV-G3NA, NV-2F, earth (ground) leakage
relay (except NV-ZHA), NV with AA neutral wire open-phase protection
The other models are designed for harmonic and surge suppression
NV-C/NV-S/MN series, NV30-FA, NV50-FA, BV-C2, earth (ground) leakage
alarm breaker (NF-Z), NV-ZHA, NV-H
* Note the leakage current value of the noise filter installed on the inverter input
side.
Leakage current (Ig1)
(mA)
Leakage current (Ign)
(mA)
Leakage current (Ig2)
(mA)
Motor leakage
current (Igm) (mA)
Total leakage current (mA)
Rated sensitivity current
(mA) ( ≥ Ig × 10)
× 5m 5.5mm
5.5mm 2
NV Noise filter
Inverter
Ig1 Ign
connection neutral point earthed (grounded) system, the sensitivity
INSTALLATION AND WIRING
× 70m
2
3φ
IM
200V 2.2kW
Ig2 Igm
Breaker for Harmonic
and Surge
33 ×
0 (without noise filter)
33 ×
2.66
30
52
Standard Breaker
5m
= 0.17
1000m
70m
= 2.31
1000m
0.18
7.64
100