Load-break switch and cable protection
NOTICE
Damage to the inverter due to the use of screw-type fuses as load-break switches
Screw-type fuses (e.g. DIAZED fuse or NEOZED fuse) are not load-break switches.
- Do not use screw-type fuses as load-break switches.
- Use a load-break switch or circuit breaker as a load disconnection unit (for information and design examples, see the Technical Information "Miniature circuit breaker" at www.SMA-Solar.com).
In PV systems with multiple inverters, protect each inverter with a separate all-pole circuit breaker. Make sure to observe the maximum permissible fuse protection ( > Technical Data). This will prevent residual voltage from being present at the corresponding cable after disconnection.
Loads installed between the inverter and the circuit breaker must be fused separately.
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