Miniature Circuit Breaker (MCB)

The CHM1EL series intelligent residual current circuit breaker is a key electrical protection device in power distribution equipment. It provides leakage, overload, and short-circuit protection, automatically shutting off power to ensure safety. It features intelligent monitoring, providing real-time circuit status information and visually displaying it on a digital display. Suitable for a variety of applications, including residential, commercial, and industrial, it ensures the reliability and safety of power systems.

Product Features
Compliant Standards
·GB/T14048.1 General
·GB/T14048.2 Circuit Breakers
·IEC 60947-1 General
·IEC 60947-2 Circuit Breakers

Ambient Temperature
·The series can operate continuously within normal ambient and operating temperatures of -5°C to 40°C.
·For operating temperatures exceeding 40°C (over 60°C for motor protection), derating should be applied or contact us.
·Storage temperature range: -20°C to 70°C.

Altitude
·The normal operating installation altitude must not exceed 2000m. If installation is required at altitudes exceeding 2000m, changes in dielectric strength and air temperature drop must be considered. Refer to the altitude derating factor table for details.

Protection Level
Circuit breaker body: IP20
Circuit breaker installed in switchgear:
Circuit breaker with toggle handle: IP40
Circuit breaker with electric operating mechanism: IP40

Pollution Degree
This product operates in pollution degree 3 environments (industrial environments) as defined by IEC 60947-1 and 60664-1.

Humidity
Normal operation requires:
At an ambient air temperature of +40°C, the relative humidity must not exceed 50%. Higher relative humidity conditions are acceptable at lower temperatures.
The average relative humidity in the wettest month is 90%.
Condensation on the product surface must be considered to affect product performance.

Reliable contact indication with isolation function
· All molded case circuit breakers in this series comply with the isolation requirements defined in IEC standard 60947-2.
· The isolation position corresponds to the O (OFF) position.
· The operating handle indicates the "OFF" position only when the contacts are actually open.
· Rotating the handle or electric operating mechanism does not alter the reliability of the contact indication system. After testing, the isolation function must ensure:
· Mechanical reliability of the contact indication system
· No leakage current
· A certain overvoltage withstand capability between the input and output terminals.

12kV outdoor high-voltage disconnectors and vacuum circuit breakers are widely used in medium-voltage power distribution systems, primarily providing control, isolation, and protection. They are particularly well-suited for substations, industrial and mining enterprises, and rural power grid upgrades.

Product Advantages:
High insulation performance: Utilizes high-voltage composite or ceramic insulators, suitable for harsh outdoor environments.
Safety isolation: Features a clearly visible break, ensuring safe maintenance.
Modular structure: Easy installation and easy integration with vacuum circuit breakers, lightning arresters, and other devices.
Multiple operation modes: Supports manual, electric, and remote control to meet the needs of smart grid access.
Low maintenance: Vacuum arc extinguishing design ensures long mechanical life and is suitable for frequent operation.

Typical Applications:
Rural distribution line segmentation; Industrial user line isolation; Boundary switches in urban distribution automation systems; Small substation inlet and outlet protection equipment.

Combining high-reliability operation with safe isolation, this series of 12kV outdoor high-voltage disconnectors and vacuum circuit breakers is an indispensable component of modern power distribution systems, contributing to efficient, safe, and intelligent power grid operation.

The DZ47-63 series miniature circuit breakers feature a comprehensive structure, reliable performance, high breaking capacity, and an attractive and compact appearance. The housing and main components are constructed of impact-resistant, highly flame-retardant materials.

Applications and Features
The DZ47-63 standard miniature circuit breaker is suitable for controlling and isolating low-voltage terminal power distribution in residential, industrial, and construction applications, providing overload and short-circuit protection for low-voltage terminal distribution lines and electrical equipment. It can also be used for infrequent switching operations.

Product Description:
The DZ47Z series DC miniature circuit breakers are designed specifically for DC circuits. They feature a comprehensive structure, reliable performance, high breaking capacity, and an attractive and compact appearance. The housing and main components are constructed of impact-resistant, highly flame-retardant materials.

Applications and Features:
The DZ47Z series DC miniature circuit breakers are suitable for controlling and isolating DC terminal distribution circuits in solar photovoltaic systems, energy storage systems, communication base stations, DC microgrids, rail transit, and electric vehicle charging facilities. They also provide overload and short-circuit protection for DC terminal distribution lines and electrical equipment. They can also be used for infrequent switching operations.

The CHB1YF series photovoltaic miniature reclosing circuit breaker is a protective device designed specifically for photovoltaic power generation systems. It offers high reliability and stability, effectively protecting photovoltaic panels and the system.

Utilizing advanced reclosing technology, this circuit breaker rapidly disconnects power when a short circuit or overload is detected and automatically restores power after the fault is resolved, minimizing system downtime.

Its compact design makes it easy to install in various photovoltaic systems, and it offers both manual and automatic operation modes, allowing users to choose according to their needs.

The CHB1YF series circuit breaker also features excellent weather resistance and anti-interference capabilities, making it suitable for a variety of harsh environmental conditions. It is an indispensable safety device for photovoltaic power generation systems.

The DZ30-32/DZ30LE-32 (DPN) series of small leakage circuit breakers provide effective personal safety protection for low-voltage terminal power distribution in residential, industrial, construction and other fields through leakage protection function.

Applications and Features: Suitable for low-voltage terminal distribution in residential, industrial, and construction applications, it provides overload, short-circuit, isolation, and leakage protection. It can simultaneously disconnect both the phase and neutral wires, protecting electrical equipment from insulation failures and providing personal protection against indirect contact and supplementary protection against direct contact.

The DZ47LE series leakage circuit breakers feature a comprehensive structure, reliable performance, high breaking capacity, and an attractive and compact appearance. The housing and main components are constructed of impact-resistant, highly flame-retardant materials. They are suitable for applications operating at 50Hz or 60Hz AC, with a rated operating voltage of 400V and below, and a rated current of 6A to 63A.

Applications and Features
The DZ47LE-63 standard miniature leakage circuit breaker is a ground fault protection device with a wide range of applications. It offers various operating levels, such as 30mA and 50mA, to meet diverse protection needs. The use of a fog-sequence current transformer and integrated amplifier circuit ensures high sensitivity, enabling detection of ground fault currents, significantly reducing the risk of fire and electric shock. The DZ47LE-63 standard miniature leakage circuit breaker provides:
Provides personal protection against indirect contact
Provides supplementary personal protection against direct contact
Provides protection against insulation failures in electrical equipment

DZ47 series miniature circuit breaker accessories are suitable for low-voltage terminal distribution systems to ensure circuit safety, prevent overload and short circuit, and achieve effective circuit control and protection.

Applications and Features
Suitable for low-voltage terminal distribution in residential, industrial, and construction applications. It provides overload, short-circuit protection and control, and isolation. It can simultaneously disconnect both the phase and neutral lines, but does not protect the neutral line.