Line fuses, fuse types

Line fuses and miniature circuit breakers are used for fusing the supply system cables of the axis system. In case of a fault, these components protect the power supply module against short-circuits. For fusing, use fuses and miniature circuit breakers with the following properties:

Type class

Requirement

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 miniature circuit breaker currents must be at least 10% above the nominal line current of the power supply module

Adhere to the country-specific and system-specific regulations when carrying out the fusing.

The maximum line current can be limited by the power supply module by specifying a maximum value for the current on the B-side IB. Parameter P8800.6 is available for this purpose.

The resulting maximum line current is calculated using the following formula:

IL1 = IL2 = IL3 = IB × 2/3 + 0.5 A.