33kv air circuit breaker ratings
Here are some common ratings for 33kV air circuit breakers:
Ratings:
- Voltage Rating: 33 kV (33,000 volts)
- Current Rating: Typically ranging from 630 A to 4000 A, depending on the manufacturer and application.
- Breaking Capacity (B.C.): The maximum current that the breaker can interrupt, usually expressed in amperes. For 33kV air circuit breakers, the breaking capacity can range from 20 kA to 50 kA.
- Short-Circuit Current Rating (SCCR): The maximum short-circuit current that the breaker can withstand, usually expressed in amperes. For 33kV air circuit breakers, the SCCR can range from 50 kA to 100 kA.
- Insulation Level: The maximum voltage that the breaker's insulation can withstand without breaking down, usually expressed in kV. For 33kV air circuit breakers, the insulation level is typically 33 kV.
- Operating Mechanism: The type of operating mechanism used to trip the breaker, such as spring-operated, oil-operated, or motor-operated.
- Arc Chute: The type of arc chute used to extinguish the arc during switching, such as a fixed arc chute or a moving arc chute.
- Cooling System: The method used to cool the breaker, such as natural convection, forced air cooling, or liquid cooling.
- Environmental Ratings: The breaker's ability to operate in various environmental conditions, such as temperature, humidity, and altitude.
Some common 33kV air circuit breaker ratings:
- ABB's 33kV air circuit breaker: 630 A to 4000 A, 20 kA to 50 kA B.C., 50 kA to 100 kA SCCR
- Siemens' 33kV air circuit breaker: 630 A to 4000 A, 20 kA to 50 kA B.C., 50 kA to 100 kA SCCR
- GE's 33kV air circuit breaker: 630 A to 4000 A, 20 kA to 50 kA B.C., 50 kA to 100 kA SCCR
- Schneider Electric's 33kV air circuit breaker: 630 A to 4000 A, 20 kA to 50 kA B.C., 50 kA to 100 kA SCCR
Please note that these ratings are general and may vary depending on the specific breaker model and manufacturer. It's always best to consult the manufacturer's documentation and specifications for the specific breaker being used.