Application of DC miniature circuit breaker in combiner box
1. Improve safety: There are usually multiple branches inside the combiner box. When a branch fails, it may cause failure of other branches. The application of DC small circuit breakers can cut off faulty branches in time to prevent fault expansion and protect the safety of the entire combiner box.
2. Improve stability: Since there are many devices inside the combiner box, the current fluctuations are large, which can easily affect the equipment. The application of DC small circuit breakers can monitor current, voltage and other parameters in real-time, and cut off the circuit in time when the parameters are abnormal to protect the equipment from damage. At the same time, by rationally configuring the circuit breaker parameters of each branch, the impact of current fluctuations on the equipment can be reduced and the stability of the combiner box can be improved.
3. Reduce maintenance costs: Because DC miniature circuit breakers have high reliability and stability, they can effectively reduce the failure rate of the combiner box and reduce maintenance costs. At the same time, due to the intelligent function of the circuit breaker, remote monitoring and maintenance can be easily realized, further reducing maintenance costs.
MCB
The circuit breaker consists of the following main parts:
1. Separable contact connection. It consists of a fixed contact and a movable contact.
2. A device consisting of a metal cylinder or an insulated cylinder, wherein a separable contact connection an arc extinguishing device, and a transmission device are installed.
3. Drive the transmission device of the contact.
4. Arc extinguishing equipment.
Solar DC MCB
How does a DC circuit breaker work?
In DC grids the zero current crossing must be provided by the circuit breaker itself. Unlike AC girds, the magnetic energy of DC grids is stored in the system inductance. The DC circuit breaker must dissipate this energy, and withstand the residual overvoltages after the current interruption.
The Standard voltage of DC MCB
1P 250V, 2P 500V/550V, 3P 750V, 4P 1000V.
Notice: If you purchase a non-standard voltage DC MCB, such as 2P 800V, or 1000V, there will be a risk of burning.
The Standard Ampere of DC MCB
The usual current ranges from 3-63A，lower than 3A can also be produced but rarely used.
You should purchase a molded case circuit breaker(MCCB) when the ampere is higher than 63A, otherwise, your electrical system is also at risk.
1. Improve safety: There are usually multiple branches inside the combiner box. When a branch fails, it may cause failure of other branches. The application of DC small circuit breakers can cut off faulty branches in time to prevent fault expansion and protect the safety of the entire combiner box.
2. Improve stability: Since there are many devices inside the combiner box, the current fluctuations are large, which can easily affect the equipment. The application of DC small circuit breakers can monitor current, voltage and other parameters in real-time, and cut off the circuit in time when the parameters are abnormal to protect the equipment from damage. At the same time, by rationally configuring the circuit breaker parameters of each branch, the impact of current fluctuations on the equipment can be reduced and the stability of the combiner box can be improved.
3. Reduce maintenance costs: Because DC miniature circuit breakers have high reliability and stability, they can effectively reduce the failure rate of the combiner box and reduce maintenance costs. At the same time, due to the intelligent function of the circuit breaker, remote monitoring and maintenance can be easily realized, further reducing maintenance costs.