Circuit breakers for higher currents

Circuit breakers are designed to interrupt electrical currents in the event of an overload or short circuit. However, when dealing with higher currents, standard circuit breakers may not be sufficient. Here are some options for circuit breakers that can handle higher currents:

  1. Molded Case Circuit Breakers (MCCBs): MCCBs are designed for higher currents and are available in ratings up to 600 A. They are commonly used in industrial and commercial applications.
  2. Air Circuit Breakers (ACBs): ACBs are designed for higher currents and are available in ratings up to 4000 A. They are commonly used in high-voltage applications, such as power distribution systems.
  3. Oil Circuit Breakers (OCBs): OCBs are designed for high-voltage applications and are available in ratings up to 50 kA. They are commonly used in power transmission and distribution systems.
  4. Vacuum Circuit Breakers (VCBs): VCBs are designed for high-voltage applications and are available in ratings up to 40 kA. They are commonly used in power transmission and distribution systems.
  5. High-Voltage Circuit Breakers (HVCBs): HVCBs are designed for extremely high-voltage applications and are available in ratings up to 100 kA. They are commonly used in power transmission and distribution systems.

When selecting a circuit breaker for higher currents, consider the following factors:

  1. Current rating: Ensure the circuit breaker is rated for the maximum current expected in the circuit.
  2. Voltage rating: Ensure the circuit breaker is rated for the maximum voltage expected in the circuit.
  3. Breaking capacity: Ensure the circuit breaker has sufficient breaking capacity to interrupt the fault current.
  4. Arcing distance: Ensure the circuit breaker has sufficient arcing distance to safely interrupt the fault current.
  5. Operating mechanism: Ensure the circuit breaker's operating mechanism is suitable for the expected operating conditions.
  6. Environmental conditions: Ensure the circuit breaker is designed for the expected environmental conditions, such as temperature, humidity, and vibration.

Some popular manufacturers of high-current circuit breakers include:

  1. Schneider Electric
  2. ABB
  3. Siemens
  4. GE Industrial Solutions
  5. Eaton
  6. Mitsubishi Electric
  7. Toshiba

When selecting a circuit breaker for higher currents, it's essential to consult with a qualified electrical engineer or a certified electrician to ensure the correct selection for the specific application.