Mitsubishi Electric FR-E700 Series Instruction Manual page 78

Electromagnetic compatibility (EMC)
Example
Leakage current Ig1 [mA]
Leakage current Ign [mA]
Leakage current Igi [mA]
Leakage current Ig2 [mA]
Motor leakage current Igm [mA]
Total leakage current [mA]
Rated sensivity current [mA]
Tab. 3-21: Estimation of the permanent flowing leakage current
NOTES The frequency inverter monitors its own output for ground faults up to a frequency of 120Hz.
However, it is important to understand that this feature only protects the inverter itself. It cannot
be used to provide protection against shock hazards for personnel.
In the connection earthed-neutral system, the sensitivity current is purified against an earth fault
in the inverter output side. Earthing must conform to the requirements of national and local safety
regulations and electrical codes. (JIS, NEC section 250, IEC 536 class 1 and other applicable stand-
ards)
When the breaker is installed on the output side of the inverter, it may be unnecessarily operated
by harmonics even if the effective value is less than the rating. In this case, do not install the
breaker since the eddy current and hysteresis loss will increase, leading to temperature rise.
The following models are standard breakers: BV-C1, BC-V, NVB, NV-L, NV-G2N, NV-G3NA and NV-2F
earth 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 leakage alarm breaker (NF-Z), NV-ZHA, NV-H.
3 - 46
5.5mm² × 5m
Noise filter
(optional)
3
ELB
Ig1 Ign
Breaker Designed for Harmonic and
5.5mm² × 60m
Inverter
Ig2
Igi
Surge Suppression
1
×
-- -
66
3
0 (without noise filter)
1 (with noise filter)
1
×
-- - 66
3
2.79
30
M
3~, 400V, 2.2kW
3~
Igm
Standard Breaker
5m
×
------------------
= 0.11
1000m
60m
×
------------------ = 1,32
1000m
0.36
6.15
100
Wiring