B6 and c6 marks on circuit breakers

A very specific question!

On a circuit breaker, the "B6" and "C6" markings typically refer to the breaker's trip characteristics and settings. Here's a breakdown of what they usually mean:

B6:

• "B" stands for "B-type" or "B-curve" trip characteristic.
• The number "6" indicates the trip curve's slope or sensitivity.
• A B6 trip characteristic means that the breaker has a relatively fast trip time (typically in the range of 1-10 milliseconds) and a high sensitivity to current changes.
• This type of trip characteristic is often used in applications where high-speed fault detection is critical, such as in power distribution systems or industrial control panels.

C6:

• "C" stands for "C-type" or "C-curve" trip characteristic.
• The number "6" again indicates the trip curve's slope or sensitivity.
• A C6 trip characteristic means that the breaker has a slower trip time (typically in the range of 10-100 milliseconds) and a lower sensitivity to current changes compared to a B6 breaker.
• This type of trip characteristic is often used in applications where slower fault detection is acceptable, such as in residential or commercial power distribution systems.

In summary, the main difference between B6 and C6 circuit breakers is their trip characteristic and sensitivity to current changes. B6 breakers are designed for high-speed fault detection and are typically used in applications where fast tripping is critical, while C6 breakers are designed for slower fault detection and are typically used in applications where slower tripping is acceptable.