Types of circuit breakers pdf

Here are some common types of circuit breakers and their characteristics:

1. Air Circuit Breakers (ACBs)

• Use air as the arc-quenching medium
• Suitable for indoor and outdoor applications
• Available in various voltage ratings (e.g., 120V, 240V, 480V)
• Can be used in both residential and commercial settings

2. Molded Case Circuit Breakers (MCCBs)

• Use a molded case to house the breaker and its components
• Suitable for indoor applications
• Available in various voltage ratings (e.g., 120V, 240V, 480V)
• Often used in commercial and industrial settings

3. Oil Circuit Breakers (OCBs)

• Use oil as the arc-quenching medium
• Suitable for high-voltage applications (e.g., 15kV, 35kV)
• Often used in transmission and distribution systems

4. Vacuum Circuit Breakers (VCBs)

• Use a vacuum as the arc-quenching medium
• Suitable for high-voltage applications (e.g., 15kV, 35kV)
• Often used in transmission and distribution systems

5. Gas Circuit Breakers (GCBs)

• Use a gas (e.g., sulfur hexafluoride) as the arc-quenching medium
• Suitable for high-voltage applications (e.g., 15kV, 35kV)
• Often used in transmission and distribution systems

6. Low-Voltage Power Circuit Breakers (LVPs)

• Designed for low-voltage applications (e.g., 120V, 240V)
• Suitable for residential and commercial settings
• Often used in panelboards and load centers

7. High-Voltage Power Circuit Breakers (HVPs)

• Designed for high-voltage applications (e.g., 15kV, 35kV)
• Suitable for transmission and distribution systems
• Often used in substations and power plants

8. Arc Fault Circuit Breakers (AFCBs)

• Designed to detect and interrupt arc faults
• Suitable for residential and commercial settings
• Often used in conjunction with other types of circuit breakers

9. Ground Fault Circuit Breakers (GFCBs)

• Designed to detect and interrupt ground faults
• Suitable for residential and commercial settings
• Often used in conjunction with other types of circuit breakers

10. Molded Case Ground Fault Circuit Breakers (MCGFCBs)

• Combine the features of MCCBs and GFCBs
• Suitable for indoor applications
• Often used in commercial and industrial settings

These are just a few examples of the many types of circuit breakers available. The specific type of circuit breaker used depends on the application, voltage rating, and other factors.

You can download a PDF document that provides more information on these types of circuit breakers from the following sources:

• National Electric Code (NEC) Handbook
• International Electrotechnical Commission (IEC) publications
• Manufacturer's websites (e.g., Schneider Electric, Siemens, GE)
• Industry associations (e.g., National Electrical Manufacturers Association (NEMA))