Common low voltage circuit breaker selection
This period of time, people often ask about various types of circuit breaker models, such as DW-15 series universal type breaker, due to some specific things, such as tripping device models, accessories. It also relates to the most basic size, type and so on, so I think that to master some common low-voltage circuit breaker type choice, is a very meaningful! To reasonable choice, first of all need the basic classification, the box set large. In general, low voltage circuit breaker according to the arc extinguishing medium, air circuit breaker and vacuum breaker; by usage, a distribution circuit breaker, motor protection circuit breaker, lighting circuit breakers and residual current protective circuit breaker. Here I am with Shanghai thermal electric appliance switch factory 's production of some products details.
DW15 series universal type air circuit breaker
DW15, DW15C series universal type circuit breaker is applicable to the exchange of 50Hz, rated current up to 4000A, rated voltage to 1140V ( rated current of frame below 630A) 80V ( rated current of frame 1000A and above ) of the power distribution network, to the distribution of power and the power of power lines and equipment overload, under-voltage, short circuit protection for. Rated current of frame 630A and below the circuit breaker can also in 50Hz, 380V network for motor overload, under-voltage and short circuit protection.
Circuit breaker in normal conditions can be used as lines without frequent conversion, rated current of frame 630A and below the circuit breaker under normal conditions but also can be used as the infrequent start of motor.
DW17 series universal type air circuit breaker
DW17 series air circuit breaker is applicable to the exchange of 50Hz, 380V, 660V or 440V DC voltage, current to 4000A power distribution network, to the distribution of power and protection of power lines and equipment overload, under-voltage, short circuit, under normal conditions, can be used as the lines without frequent conversion, 1250A following circuit breaker in AC 50Hz, voltage 380V network can be used in protection of motor overload and short circuit. Under normal conditions, but also can be used as the infrequent start of motor.
DW45 universal circuit breaker intelligent circuit breaker
DW45 series of intelligent type air circuit breaker is used to control and protection of low voltage distribution network. Usually installed in the low-voltage distribution cabinet control switch up protective effect. Rated current of 1000A and below the circuit breaker, can also be used for protecting electric motor. Products can provide damp-heat type ( type TH ), ship type and class 1E circuit breaker, can provide low temperature to - 40 degrees C circuit breaker, and can provide a liquid crystal display and digital display circuit breaker. For the" China famous brand" products.
Intelligent, zero flashover, with isolation function;
DZ5 series moulded case circuit breaker
DZ5 series plastic shell type circuit breaker is applicable to the exchange of 50Hz, 380V, rated current from 0.15 to 50A circuits. Motor protection breaker for protecting a motor overload and short circuit, power distribution circuit breaker in the power distribution network for the distribution of power and make the power lines and equipment overload and short circuit protection, can be as frequent starting and electric lines without frequent conversion with.
DZ10 series moulded case circuit breaker
DZ10 series moulded case circuit breaker is applicable to the exchange of 50Hz, 380V or DC 220V and below the power lines of for the distribution of power and protection of power lines and equipment overload, under-voltage and short circuit, as well as in the normal work conditions and frequent breaking of on line with.
DZ12 plastic casing type circuit breaker
The DZ12-60 plastic shell type circuit breaker has the advantages of small volume, novel structure, excellent performance and reliability. The main device in lighting distribution box, used in hotel, Residence, high-rise building, square, airport, train station and the industrial and commercial enterprises and other units of the AC single-phase 50Hz 230V, three / 00v and below the lighting circuits, as the line overload, short circuit protection and under normal circumstances as the lines without frequent conversion with.
DZ15 series plastic shell type circuit breaker
DZ15 series plastic shell type circuit breaker is applicable to the exchange of 50Hz, rated voltage, rated current 380V to 63A ( 100) of the circuit as on-off operation, and can be used to protect the circuit and motor overload and short circuit protection, can also be used as the line is not frequent and infrequent start of motor.
DZ20 series plastic shell type circuit breaker
DZ20 series plastic shell type circuit breaker is applicable to the exchange of 50Hz, rated voltage 660V, rated voltage 380V ( 400V ) and below, its rated current up to 1250a. As a general distribution, rated current 200A and 400Y type circuit breaker can also be used as a protection for motor. Under normal circumstances, the breaker can be respectively used as line is not frequent conversion and infrequent start of motor.
DZ47 series miniature circuit breaker
DZ47 series miniature circuit breaker is mainly suitable for AC rated voltage 50Hz / 60Hz, 240V / 415V and below, rated current to 60A circuit, the circuit breaker is mainly used in modern building of electrical wiring and equipment overload, short circuit protection, and is also suitable for lines without frequent operation and isolation.
DZ47LE series leakage circuit breaker
DZ47LE series leakage circuit breaker is applicable to the exchange of 50Hz, rated voltage to 400V, rated current to 50A line, for earth leakage protection in. When someone gets an electric shock or circuit leakage current exceeds the set value, leakage circuit breaker can in a very short time to cut off power supply automatically, ensure the personal safety device for preventing from leakage current accident.
H series moulded case circuit breaker
H series moulded case circuit breaker is applicable to the exchange of 50Hz ~ 60Hz, rated voltage to DC 690V, 250V, rated current to 1200A power distribution network. For the distribution of power and protection circuit and the source of public equipment overload, under-voltage and short circuit, as well as in normal conditions and frequent breaking of power lines used to connect.
The above information by the country electric switch factory for you, www.jiandq.com