Current circuit breaker ratings and specifications

Here are some common circuit breaker ratings and specifications:

Ratings:

1. Current Rating: The maximum current that a circuit breaker can safely interrupt without damage. Typically measured in amperes (A).
2. Voltage Rating: The maximum voltage that a circuit breaker can operate safely. Typically measured in volts (V).
3. Interrupting Rating: The maximum current that a circuit breaker can interrupt without damage. This rating is usually higher than the current rating.
4. Short-Circuit Current Rating: The maximum current that a circuit breaker can withstand for a short period (typically 1-3 cycles) without damage.

Specifications:

1. Type: There are several types of circuit breakers, including:
   • MCB (Miniature Circuit Breaker): Small, compact breakers used in residential and commercial applications.
   • MCCB (Molded Case Circuit Breaker): Larger, more robust breakers used in industrial and commercial applications.
   • ABB (Air-Break Breaker): Breakers that use air as the arc-quenching medium.
   • SF6 (Sulfur Hexafluoride) Breaker: Breakers that use SF6 gas as the arc-quenching medium.
2. Trip Characteristics: The way a circuit breaker trips, including:
   • Instantaneous Trip: Trips immediately when the current exceeds the set value.
   • Time-Delay Trip: Trips after a delay period when the current exceeds the set value.
   • Inverse Time-Delay Trip: Trips after a delay period that decreases as the current increases.
3. Pole Configuration: The number of poles (phases) on a circuit breaker, including:
   • Single-Pole: One pole, used for single-phase applications.
   • Two-Pole: Two poles, used for two-phase applications.
   • Three-Pole: Three poles, used for three-phase applications.
4. Frame Size: The physical size of the circuit breaker, including:
   • Standard Frame: A standard size frame used for most applications.
   • Compact Frame: A smaller frame used for space-constrained applications.
   • Large Frame: A larger frame used for high-power applications.
5. Mounting: The way a circuit breaker is mounted, including:
   • Panel Mount: Mounted directly into a panel or enclosure.
   • Surface Mount: Mounted on the surface of a panel or enclosure.
   • DIN Rail Mount: Mounted on a DIN rail.
6. Certifications: Circuit breakers may carry various certifications, including:
   • UL (Underwriters Laboratories) certification: Meets safety standards for the United States and Canada.
   • CSA (Canadian Standards Association) certification: Meets safety standards for Canada.
   • IEC (International Electrotechnical Commission) certification: Meets safety standards for international applications.

Some common circuit breaker ratings and specifications include:

• 15A, 20A, 30A, 40A, 50A, 60A, 80A, 100A, 200A, 400A, etc. (current rating)
• 120V, 240V, 480V, 600V, 1000V, etc. (voltage rating)
• 10kA, 20kA, 30kA, 40kA, 50kA, etc. (interrupting rating)
• 100kA, 200kA, 300kA, 400kA, 500kA, etc. (short-circuit current rating)

Please note that these are general specifications and ratings, and actual values may vary depending on the manufacturer and specific product. It's always best to consult the manufacturer's documentation or specifications for a specific circuit breaker.