Which circuit breaker suitable for 60 kva gen set

Choosing the right circuit breaker for a 60 kVA generator set (genset) depends on several factors, including the type of generator, the electrical load it will be powering, and the local electrical codes and regulations. Here are some general guidelines to help you select a suitable circuit breaker:

  1. Type of circuit breaker: For a 60 kVA genset, you'll likely need a circuit breaker that is designed for industrial or commercial applications. Look for a breaker that is rated for high-voltage, high-current applications.
  2. Voltage rating: The circuit breaker should be rated for the same voltage as the genset, which is typically 208V, 230V, or 480V.
  3. Current rating: The circuit breaker's current rating should be higher than the maximum current output of the genset. For a 60 kVA genset, the maximum current output is typically around 250-300 amps.
  4. Short-circuit current rating: The circuit breaker should be rated for the maximum short-circuit current that the genset can produce. This is typically around 10-15 times the full-load current of the genset.
  5. Inrush current rating: The circuit breaker should be able to handle the inrush current of the genset, which is the initial surge of current when the genset is started.

Based on these factors, here are some circuit breaker options that may be suitable for a 60 kVA genset:

  1. Molded Case Circuit Breakers (MCCBs):
    • Square D by Schneider Electric: QO or Homeline series, rated for 208V, 230V, or 480V, with current ratings up to 400 amps.
    • Siemens: SACE or Sentron series, rated for 208V, 230V, or 480V, with current ratings up to 400 amps.
  2. Air Circuit Breakers (ACBs):
    • ABB: Tmax or Minstar series, rated for 208V, 230V, or 480V, with current ratings up to 400 amps.
    • GE: Genie or Sentinel series, rated for 208V, 230V, or 480V, with current ratings up to 400 amps.
  3. Vacuum Circuit Breakers (VCBs):
    • ABB: VD or VD3 series, rated for 208V, 230V, or 480V, with current ratings up to 400 amps.
    • Siemens: 3VA or 3VB series, rated for 208V, 230V, or 480V, with current ratings up to 400 amps.

When selecting a circuit breaker, be sure to consult the genset manufacturer's specifications and recommendations, as well as local electrical codes and regulations. It's also a good idea to consult with a licensed electrician or electrical engineer to ensure that the chosen circuit breaker meets all the necessary requirements.