Mitsubishi Electric FR-D720S SC EC Instruction Manual page 83

Wiring
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. 3-22: Estimation of the permanent flowing leakage current (400V class, star connection)
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 can-
not 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 standards)
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 tem-
perature 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 pro-
tection.
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.
FR-D700 SC EC
5.5mm² × 5m
Noise filter
(optional)
3
ELB
Ig1 Ign
Breaker Designed for Harmonic
Electromagnetic compatibility (EMC)
5.5mm² × 60m
Inverter
Ig2
Igi
and 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
5 m
×
------------------- -
0.11
1000 m
60 m
×
------------------- -
1,32
1000 m
0.36
6.15
100
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