Breaker used for 15kva 360v inverter

A breaker for a 15kVA, 360V inverter!

To determine the correct breaker for your inverter, we need to consider a few factors:

  1. Inverter rating: 15kVA is the power rating of the inverter, which is the maximum power it can handle.
  2. Voltage rating: 360V is the DC voltage rating of the inverter, which is the maximum voltage it can handle.
  3. Current rating: To calculate the current rating, we need to know the inverter's efficiency and the maximum power it can handle. A typical efficiency for an inverter is around 95%. Let's assume an efficiency of 95% for your inverter.

Calculation:

  1. Maximum power (P) = 15kVA = 15,000 VA
  2. Efficiency (η) = 0.95
  3. Maximum power (P) = P / η = 15,000 VA / 0.95 = 15,789 W
  4. Current (I) = P / V = 15,789 W / 360 V = 43.9 A

Breaker selection:

For a 15kVA, 360V inverter, you'll need a breaker that can handle the maximum current calculated above (43.9 A). Here are some options:

  1. MCCB (Molded Case Circuit Breaker): A 40-50 A MCCB would be suitable for this application. Some popular options include:
    • Schneider Electric's Acti 9 MCCB (40 A)
    • ABB's MiniCircuit Breaker (40 A)
    • Eaton's Cutler-Hammer MCCB (50 A)
  2. Circuit breaker: A 40-50 A circuit breaker would also work. Some popular options include:
    • Littelfuse's 40 A Circuit Breaker
    • Cooper Bussmann's 50 A Circuit Breaker

Important notes:

  1. Always check the inverter's manual for specific breaker recommendations.
  2. Ensure the breaker is rated for the inverter's DC voltage (360V) and has a suitable current rating.
  3. Consider the breaker's trip characteristics, such as the trip time and sensitivity, to ensure it meets your application's requirements.
  4. Consult with a qualified electrician or engineer if you're unsure about the breaker selection or installation.

Remember to always follow proper installation and maintenance procedures for the breaker and inverter to ensure safe and reliable operation.