Siemens SINVERT 350 用户手册

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Table 4-2 ISO fault 

ISO fault 

Damaged, worn-through cables (loose, buffeted by 
wind) 
Cables damaged by animals 
Water in junction box 
Damaged insulation and ingress of water to cable 
duct 
Defective power unit 
Bending device defective 
Defect in PV module (damaged) 

High air humidity (causes high leakage currents) 

Check the sensitivity (limit values) of the insulation 
monitor using a decade resistor 
Repair the cabling 
Empty and dry out the junction boxes and / or cable 
ducts 

 

Repair / replace the drive