SMA Solar Technology SUNNY CENTRAL Technical Information Download Page 5 | Manualshive

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Technical Information

Grounded Operation

SMA Solar Technology AG

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Figure 1: Ground fault L+ (negative pole grounded)

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Summary of Contents for SUNNY CENTRAL

Page 1: ...ss of the grounding of the module frame In case of the Sunny Central with the GFDI negative ground or GFDI positive ground insulation monitoring option the grounding takes place within the device The...

Page 2: ...nverter via the GFDI The additional grounding within the PV generator or in the distributor boxes is not permissible Only in the Sunny Central 500 560HE is the grounding of the PV generator interrupte...

Page 3: ...er equipped with an adjustable triggering current with K characteristics The GFDI can be disconnected for test purposes and can switch the leakage current up to the inverter s maximum DC input voltage...

Page 4: ...e to the complex structure of the PV generator The period of time that passes before the fuse is triggered depends on the quantity of the leakage current which itself depends on the DC voltage and the...

Page 5: ...Technical Information Grounded Operation SMA Solar Technology AG 5 12 Figure 1 Ground fault L negative pole grounded...

Page 6: ...Technical Information Grounded Operation SMA Solar Technology AG 6 12 Figure 2 Ground fault on both sides...

Page 7: ...ulting leakage current This can damage the system or building components During operation During operation a ground fault in the PV generator s grounded pole causes some of the generator current to fl...

Page 8: ...Technical Information Grounded Operation SMA Solar Technology AG 8 12 Figure 3 Ground fault in the grounded pole during operation...

Page 9: ...oth poles are live potentials and must be protected against direct contact 5 Modifications to the Standard Inverter The modifications performed to the Sunny Central equipped with the GFDI option will...

Page 10: ...p mode in case of faults or in the event of a grid failure the grounding of the PV generator is interrupted by the main switch Figure 4 Position of the GFDI in the Sunny Central 500 560HE If the DC ma...

Page 11: ...led 5 3 GFDI Signaling If the GFDI is triggered this causes the Sunny Central to be deactivated The Sunny Central switches to Failure mode The power module s quick stop is activated and the DC switch...

Page 12: ...of the contact each time it is triggered This reduces the sensitivity We therefore recommend replacing the GFDI after it has been triggered approximately 100 times The following additional maintenanc...

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