Appendix D: DC Security
SolarEdge Installation Guide - MAN-01-00060-2.6
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Appendix D: DC Security
When AC power of the inverter is switched off (by closing the AC circuit breaker on the site), or when the switch ON
OFF of the inverter is OFF, the DC voltage drops to a 1V voltage safety voltage optimizer.
SolarEdge inverters are certified to the following standards as disconnection devices for PV generators, which
means that they can replace a disconnected DC:
•
IEC 60947-3: 1999 + Corrigendum: 1999 + A1: 2001 + Corrigendum 1: 2001 + A2: 2005;
•
DIN EN 60947-3
•
VDE 0660-107: 2006-03
•
IEC 60364-7-712: 2002-05
•
DIN VDE 0100-712: 2006-06.
In accordance with these standards, the disconnection mechanism works as follows:
1
Place the ON / OFF switch of the inverter at the base of the inverter OFF,
1
Place the ON / OFF switch of the inverter at the base of the inverter OFF,
or unplug the AC closing the AC breaker on the site. The DC voltage on the LCD screen of the UPS starts to
decrease.
If the AC circuit breaker was extinguished, the LCD does not display. In this case, wait five minutes.
2
When the DC voltage reaches the safe voltage, PV connectors at the input of
2
When the DC voltage reaches the safe voltage, PV connectors at the input of
UPS can be disconnected. Galvanic separation is then between the PV panel and the inverter.
Disconnection is safe even under single fault conditions.
WARNING !
Under fault condition, the DC voltage safety is guaranteed only when using modules to:
•
95 Voc when using single-phase inverter
•
70 Vov when using three-phase inverter
