List Of Circuit Breaker Models And Their Parameters
The following is a detailed list of Circuit breaker models and their parameters for reference:
1. Classification by rated current
Rated current range: 1A, 2A, 3A, 4A, 5A, 6A, 10A, 16A, 20A, 25A, 32A, 40A, 50A, 60A, 63A, 100A, etc.
2. Classification by number of poles
Single pole: Applicable to single-phase circuits.
Two poles: Applicable to single-phase circuits or two-wire circuits.
Three poles: Applicable to three-phase circuits.
Four poles: Applicable to three-phase four-wire circuits.
3. Classification by tripping form
Type C: Applicable to the current range of 5ln~10ln, commonly used for distribution protection.
Type D: Applicable to the current range of 10ln~16ln, commonly used for power protection
4. Classification by breaking capacity
N type: breaking capacity is 6000A.
H type: breaking capacity is 10000A.
L type: breaking capacity is 15kA.
5. Classification by structure
Frame circuit breaker (ACB):
Features: All parts are installed in a metal frame, with high breaking capacity and flexible protection functions.
Application: Suitable for main switch at power end, busbar contact switch, large motor control switch and other occasions.
Moulded case circuit breaker (MCCB):
Features: The main components are installed in a plastic shell, with compact structure and generally non-repairable.
Application: Suitable for branch protection switch, with overload, short circuit, undervoltage, leakage and other protection functions.
6. Classification by protection characteristics
Class A circuit breaker:
Features: In the case of short circuit, the selective protection has no artificial short delay, and has the protection characteristics of overload long delay and short circuit instantaneous action.
Application: Mainly used for plastic case circuit breakers.
Class B circuit breaker:
Features: In the case of short circuit, the selective protection has an artificial short delay, and has three-stage protection of overload long delay, short circuit instantaneous action and short circuit short delay.
Application: Mainly used for frame circuit breakers, using electronic trip devices and intelligent controllers.
7. Classification by full breaking time
General circuit breaker: full breaking time t > 30~40ms.
Fast circuit breaker: full breaking time t < 10~20ms.
8. Classification by purpose
Distribution circuit breakers:
AC: 200~5000A, used for main power switch and load start branch switch.
DC: 60~600A, used to protect silicon rectifier equipment and general DC equipment.
Motor protection circuit breakers:
AC: 60~600A, direct start overcurrent release instantaneous multiple 8~15IN, indirect start overcurrent release instantaneous multiple 3~8IN.
Lighting circuit breakers:
AC: 5~50A, with overload long delay and short circuit instantaneous protection functions.
Leakage protection circuit breaker:
AC: 20~200A, 30mA, 0.1s disconnection, used to protect personal safety and fire caused by leakage.
9. Examples of common models
Miniature circuit breakers: C65, C120, EA9, INT125 and other series.
Frame-type circuit breakers: DW series (such as DW45).
Plastic case circuit breakers: DZ series (such as DZ47).
The above information summarizes the models, parameters and classifications of circuit breakers, so that users can choose the appropriate circuit breaker according to their actual needs.
