Circuit Breaker MCB

The NC Red DC circuit breaker is designed for demanding DC applications, providing essential circuit protection where reliability is critical.
Four Product Advantages

1.The NC Red DC circuit breaker's core function is to provide critical overload and short-circuit protection, quickly interrupting potentially dangerous currents and protecting your valuable equipment and wiring from damage. This rapid response capability is essential for preventing electrical hazards.

2.The NC Red DC circuit breaker is constructed from high-quality flame-retardant material, adding a valuable layer of protection. This carefully selected flame-retardant material significantly inhibits the spread of fire in the event of an extreme electrical fault, proactively contributing to a safer operating environment.

3.In addition to its robust protection mechanisms, the NC Red DC circuit breaker features a precisely calibrated tripping mechanism and durable, high-quality construction. These features ensure consistent performance every time the breaker trips, providing greater reliability and safety for DC systems.

4.The NC Red DC circuit breaker's overall design prioritizes longevity and stable operation, making it a reliable component for critical DC circuits in solar installations, battery banks, marine electronics, RVs, and other applications requiring dependable protection and peace of mind.

Definition: The L7 photovoltaic DC circuit breaker is a miniature circuit breaker suitable for circuits with an AC frequency of 50Hz/60Hz, a rated working voltage of DC500V, DC1000V, or DC1500V, and a rated current up to 63A.
Application: It is mainly used in industrial, commercial, high-rise, and residential buildings, serving as a means for infrequent connection, disconnection, and switching of distribution lines, providing overload and short-circuit protection for lines and equipment. 
Installation method: Usually installed on TH35-7.5 mounting rail, with installation category being II and III.

Main Parameters 
Rated current: There are multiple options available, including 1A, 2A, 3A, 6A, 10A, 16A, 20A, 25A, 32A, 40A, 50A, and 63A.
Rated short-circuit breaking capacity: Generally, there are two options: 6kA and 10kA.
Pole number: It includes single-pole, two-pole, three-pole, and four-pole. The rated voltage of single-pole circuit breakers is 230V, while that of two-pole, three-pole, and four-pole circuit breakers is 400V.
Instantaneous tripping current form: There are three types: B, C, and D.

PV DC circuit breakers are primarily used for on/off control and fault protection of DC circuits in PV systems. Common application scenarios include:
1. PV Module Side
Within the PV array's combiner box, they protect the DC circuits of individual PV modules or strings, preventing module failures (such as short circuits or overloads) from affecting the entire array.

2. Inverter FrontEnd
In the DC side of the circuit connecting the PV array and the inverter, they quickly disconnect the DC power supply when the inverter fails or requires maintenance, ensuring the safety of equipment and personnel.

3. Energy Storage System Interface
In a combined PV and energy storage system, they control the circuit between the PV DC side and the energy storage battery, preventing energy storage system failures from adversely affecting the PV array.

4. DC Merging Link
In the DC merge cabinet of a large PV power plant, they protect the circuit after multiple PV strings merge, ensuring stable and safe current flow during the merging process.
These scenarios all need to deal with the high voltage and high current characteristics of photovoltaic DC circuits, and avoid safety hazards such as arcing. Therefore, there are special requirements for the arc extinguishing ability and highvoltage resistance of the circuit breaker.