Dimensioning of the miniature circuit breakers

The selection of the right circuit breaker depends on various influencing factors. In PV systems particularly, the impact of certain factors is stronger than in customary electrical installations. If these factors are ignored, it increases the danger of the circuit breaker tripping under normal operating conditions. It is therefore important to pay special attention to these factors, as this is the only way to ensure reliable operation of the PV system and maximum possible grid feed-in.

The following table summarizes the maximum permissible fuse protection for the various SMA inverters:

Additional information is available under the following link: Technical Information "Miniature circuit breaker - Dimensioning of suitable miniature circuit breakers under PV-specific influences" and at www.SMA-Solar.com.