Precautions for use of the inverter
Install the earth leakage circuit breaker (ELB) on the input side of the inverter.
In the star connection earthed-neutral system, the sensitivity current is blunt against a ground
fault in the inverter output side. Earthing (Grounding) must conform to the requirements of
national and local safety regulations and electrical codes. (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 within the rating.
In this case, do not install the breaker since the eddy current and hysteresis loss will increase, lead-
ing to temperature rise.
The following models are standard breakers: BV-C1, BC-V, NVB, NV-L, NV-G2N, NV-G3NA, NV-2F,
earth leakage relay (except NV-ZHA), and 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, and NV-H.
Electro-magnetic interference (EMI) and leakage currents
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