Rating of circuit breaker used in bus bars

A very specific and technical question!

The rating of a circuit breaker used in bus bars depends on several factors, including:

1. Current rating: The maximum current the breaker can interrupt safely.
2. Voltage rating: The maximum voltage the breaker can operate at.
3. Breaking capacity: The maximum energy the breaker can absorb during a fault.
4. Short-circuit withstand: The maximum short-circuit current the breaker can withstand without failing.
5. Arcing fault current: The maximum current the breaker can interrupt in the presence of an arcing fault.

Here are some common ratings for circuit breakers used in bus bars:

Current ratings:

• Low-voltage (LV) breakers: 15A to 800A
• Medium-voltage (MV) breakers: 1kA to 63kA
• High-voltage (HV) breakers: 100kA to 200kA

Voltage ratings:

• LV breakers: 600V AC, 1000V DC
• MV breakers: 1kV to 38kV AC, 2.5kV to 38kV DC
• HV breakers: 72.5kV to 145kV AC, 72.5kV to 170kV DC

Breaking capacity:

• LV breakers: 10kA to 100kA
• MV breakers: 10kA to 200kA
• HV breakers: 50kA to 500kA

Short-circuit withstand:

• LV breakers: 10kA to 50kA
• MV breakers: 10kA to 100kA
• HV breakers: 50kA to 200kA

Arcing fault current:

• LV breakers: 10A to 100A
• MV breakers: 10A to 500A
• HV breakers: 50A to 1000A

Some examples of circuit breakers used in bus bars include:

• Low-voltage breakers: Siemens Sinverter, Schneider Electric Acti 9, ABB SACE
• Medium-voltage breakers: Siemens 3VA, Schneider Electric Acti 9, ABB SACE
• High-voltage breakers: Siemens 3VA, Schneider Electric Acti 9, ABB SACE, GE Grid Solutions

Please note that these ratings are general and may vary depending on the specific application, manufacturer, and type of breaker. It's essential to consult the manufacturer's documentation and follow relevant industry standards (e.g., IEEE, IEC) when selecting a circuit breaker for a specific bus bar application.