Line fuses and miniature circuit breakers

Line fuses and miniature circuit breakers are used for protecting the supply system cables. For fusing, use fuses and miniature circuit breakers with the following properties:

Type class

Prerequisite

Fuses
in utilization categories gL, gG

Fusing voltage ≥ nominal line voltage

Miniature circuit breaker
with characteristics B, C, D

  • Nominal miniature circuit breaker voltage ≥ nominal line voltage
  • Nominal currents of the miniature circuit breaker must be at least 10% higher than the nominal current of the inverter.

If necessary, observe the country-specific and system-specific regulations in the chapter "UL-compliant installation" for fusing.