To make a reasonable choice, we first need to understand their basic classification and define a large range.
Generally speaking, low-voltage circuit breakers are divided into air circuit breakers and vacuum circuit breakers according to arc extinguishing media;
According to their uses, they are divided into distribution circuit breakers, motor protection circuit breakers, lighting circuit breakers and leakage protection circuit breakers.
DZ5 series molded case circuit breakers
The DZ5 series plastic case circuit breakers are suitable for circuits with AC 50Hz, 380V and rated currents from 0.15 to 50A. Circuit breakers for protecting motors are used to protect motors from overload and short circuit. Distribution circuit breakers are used in distribution networks to distribute electrical energy and protect lines and power equipment from overload and short circuit. They can also be used for infrequent motor starting and infrequent line switching.
DZ10 series molded case circuit breakers
DZ10 series molded case circuit breakers are suitable for distribution of electric energy and protection of overload, undervoltage and short circuit of lines and power equipment in distribution lines of AC 50Hz, 380V or DC 220V and below, as well as for infrequent disconnection and connection of lines under normal working conditions.
DZ12 plastic case circuit breaker
DZ12-60 plastic case circuit breaker has a small size, novel structure, excellent and reliable performance. It is mainly installed in lighting distribution boxes and used in AC 50Hz single-phase 230V, three-side 230V and below lighting lines in hotels, apartments, high-rise buildings, squares, airports, railway stations and industrial and commercial enterprises as overload and short circuit protection of lines and infrequent conversion of lines under normal conditions.
DZ15 series molded case circuit breaker
DZ15 series molded case circuit breaker is suitable for on-off operation in circuits with AC 50Hz, rated voltage 380V, and rated current up to 63A (100). It can also be used to protect the overload and short circuit protection of the line and the motor. It can also be used for infrequent line switching and infrequent motor starting.
DZ20 series molded case circuit breaker
DZ20 series molded case circuit breaker is suitable for AC 50Hz, rated insulation voltage 660V, rated working voltage 380V (400V) and below, and its rated current is up to 1250A. Generally used for power distribution, the circuit breakers with rated current of 200A and 400Y can also be used to protect motors. Under normal circumstances, the circuit breaker can be used for infrequent line switching and infrequent motor starting respectively.
DZ47 series small circuit breakers
DZ47 series small circuit breakers are mainly suitable for circuits with AC 50Hz/60Hz, rated working voltage of 240V/415V and below, and rated current of 60A. This circuit breaker is mainly used for overload and short-circuit protection of electrical lines and equipment in modern buildings, and is also suitable for infrequent operation and isolation of lines.