China Supplier CJM1-400L/4300 Multi-Purpose industrial MCCB Moulded case circuit breaker

Product Model

CJ:Enterprise code
M:Moulded case circuit breaker
1:Design No
□:Rated current of frame
□:Breaking capacity characteristic code/S denotes standard type (S can be omitted)H denotes higher type

Note: There are four types of neutral pole (N pole) for four phases product.The neutral pole of type A is not equipped with over-current tripping element, its always switched on, and it is not switched on or off together with other three poles.
The neutral pole of type B is not equipped with over-current tripping element, and it’s switched on or off together with other three poles(the neutral pole is switched on before being switched off)The neutral pole of type C is equipped with over-current tripping element, and it’s switched on or off together with other three poles(the neutral pole is switched on before being switched off) The neutral pole of type D is equipped with over-current tripping element, it’s always switched on and is not switched on or off together with other three poles.

Table 1

Classification

• By breaking capacity: a standard type(type S) b higher breaking capacity type(type H)
• By connection mode: a front board connection, b back board connection, c plugin type
• By operation mode: a direct handle operation, b rotation handle operation,c electrical operation
• By number of poles: 1P, 2P, 3P, 4P
• By accessory: alarm contact, auxiliary contact, shunt release, under voltage release

Normal Service Condition

• The altitude of the installation site shall not exceed 2000m
• Ambient air temperature
• The ambient air temperature shall not exceed +40℃
• The average value shall not exceed +35℃ with in 24 hours
• The ambient air temperature shall not be less than -5℃
• Atmosphere condition:
• 1There lative humidity of atmosp here shall not exceed 50% at highest temperature of +40℃,and it can be higher atalower temperature,when theaver agelowest temperature in the wettest month doesn’t exceed 25℃ can be 90%,conden sationon product surfacedue to temperature change must be takenin to account.
• The pollution level is class 3

Main Technical Parameter

Outline Installation Size

CJMM1-63, 100, 225, Outline and Installation Sizes (Front board connection)

CJMM1-400,630,800,Outline and Installation Sizes (Front board connection)

Back Board Connection Cut-out Diagram Plug In

What is MCCB?

Molded case circuit breakers are electrical protection devices that are designed to protect the electrical circuit from excessive current. This excessive current can be caused due to an overload or short circuit. The molded case circuit breakers can be used in a wide range of voltages and frequencies with a defined lower and upper limit of adjustable trip settings. In addition to tripping mechanisms, MCCBs can also be used as manual disconnection switches in case of emergency or maintenance operations. MCCBs are standardized and tested for overcurrent, voltage surge, and fault protection to ensure safe operation in all environments and applications. They work effectively as a reset switch for an electric circuit to disconnect power and minimize damage caused by a circuit overload, ground fault, short circuits, or when current exceeds the current limiting.

Applications

The application of molded case circuit breakers (MCCBs) in various industries has revolutionized the way electrical systems operate. The MCCB is an important component to ensure the safe and efficient operation of the circuit. They provide protection against overloads, short circuits, and other electrical faults, which are critical in preventing electrical accidents and fire hazards.

One of the main advantages of MCCBs is their ability to handle high currents. They are specifically designed to protect and control circuits with high energy demands. Industries such as manufacturing, mining, oil and gas, and transportation rely heavily on MCCBs to protect their critical electrical equipment and infrastructure. The ability of MCCBs to efficiently handle high currents and automatically disconnect power in the event of overload or failure makes MCCBs indispensable in these industries.

Another significant advantage of the MCCB is its ease of installation and use. They are compact in size and can be easily integrated into switchboards and switchboards. Their modular design allows flexible configuration, making them adaptable to different installation requirements. In addition, MCCBs are available in a wide range of rated currents, ensuring compatibility with various electrical loads. Ease of installation and use makes MCCBs a popular choice for new installations and retrofits to existing electrical systems.

The accuracy and reliability of MCCBs play a vital role in ensuring the uninterrupted operation of electrical systems. MCCBs have advanced trip mechanisms that accurately detect and respond to electrical faults. They are equipped with various types of sensors and sensors such as thermal, magnetic, electronic, etc., which can sense abnormal electrical conditions. Once a fault is detected, the MCCB trips and immediately disconnects power, preventing any further damage.

MCCBs also help improve the overall energy efficiency of electrical systems. By effectively protecting against electrical failures and overloads, they prevent excessive heat generation and unnecessary waste of electricity. This not only reduces the risk of equipment damage, but also optimizes energy consumption. With people’s increasing emphasis on energy saving and sustainable development, the application of molded case circuit breakers is crucial to ensure efficient and environmentally friendly operations in different industries.

In short, the wide application of molded case circuit breakers has significantly improved the safety, reliability and efficiency of electrical systems in various industries. Their ability to handle high currents, ease of installation, precise fault detection, and contribution to energy efficiency make them indispensable components in electrical protection and control. As technology advances, molded case circuit breakers continue to evolve to meet the growing demands of modern electrical systems. As industries continue to rely on electrification to operate, the MCCB’s role in ensuring the safe and efficient operation of circuits will only become more important.