Their are lot of various type of circuits breakers but here lets take a little over view about sum of them.
According different criteria there are different types of circuit breaker
According to their arc quenchin media the circuit breaker can be divided as
1) Oil circuit breaker
2) Air circuit breaker
3) SF6 circuit breaker
4) Vacuum circuit breaker
According to their services the circuit breaker can be divided as
1) Outdoor circuit breaker
2) Indoor breaker
According to the operating mechanism of circuit breaker they can be divided as
1) Spring operated circuit breaker
2) Pneumatic circuit breaker
3) Hydrolic circuit breaker
According to the voltage level of installation types of circuit breaker are referred as
1) High voltage circuit breaker
2) Medium voltage circuit breaker
3) Low voltage circuit breaker
Values for the rated current are 6 A, 10 A, 13 A, 16 A, 20 A, 25 A, 32 A, 40 A, 50 A, 63 A, 80 A, 100 A, and 125 A (Renard series, slightly modified to include current limit of British BS 1363 sockets). The circuit breaker is labeled with the rated current in amperes, but without the unit symbol "A".
Instead, the ampere figure is preceded by a letter "B", "C" or "D", which indicates the instantaneous tripping current — that is, the minimum value of current that causes the circuit breaker to trip without intentional time delay (i.e., in less than 100 ms), expressed in terms of In:
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1) Oil circuit breaker
2) Air circuit breaker
3) SF6 circuit breaker
4) Vacuum circuit breaker
According to their services the circuit breaker can be divided as
1) Outdoor circuit breaker
2) Indoor breaker
According to the operating mechanism of circuit breaker they can be divided as
1) Spring operated circuit breaker
2) Pneumatic circuit breaker
3) Hydrolic circuit breaker
According to the voltage level of installation types of circuit breaker are referred as
1) High voltage circuit breaker
2) Medium voltage circuit breaker
3) Low voltage circuit breaker
Values for the rated current are 6 A, 10 A, 13 A, 16 A, 20 A, 25 A, 32 A, 40 A, 50 A, 63 A, 80 A, 100 A, and 125 A (Renard series, slightly modified to include current limit of British BS 1363 sockets). The circuit breaker is labeled with the rated current in amperes, but without the unit symbol "A".
Instead, the ampere figure is preceded by a letter "B", "C" or "D", which indicates the instantaneous tripping current — that is, the minimum value of current that causes the circuit breaker to trip without intentional time delay (i.e., in less than 100 ms), expressed in terms of In:
| Type | Instantaneous tripping current |
|---|---|
| B | above 3 In up to and including 5 In |
| C | above 5 In up to and including 10 In |
| D | above 10 In up to and including 20 In |
| K | above 8 In up to and including 12 In
For the protection of loads that cause frequent short duration (approximately 400 ms to 2 s) current peaks in normal operation.
|
| Z | above 2 In up to and including 3 In for periods in the order of tens of seconds.
For the protection of loads such as semiconductor devices or measuring circuits using current transformers.
|
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