Appendix D Safe Dc - SolarEdge SE3000 Installation Manual

Appendix D
Safe DC
When AC supply to the inverter is shut off, by shutting off the AC breaker at the
site, or when the inverter ON/OFF switch is turned to OFF, the DC voltage drops
to a safe voltage of 1V per optimizer.
The SolarEdge inverters are certified for compliance with 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 and DIN VDE
0100-712:2006-06 as a disconnection device for PV generators, meaning that they
can replace a DC disconnect.
In compliance with this standard, the disconnection mechanism operates as
follows:

Turn the inverter ON/OFF switch, located at the bottom of the inverter, to
OFF, or disconnect the AC by shutting off the AC breaker at the site.

The DC voltage displayed on the inverter LCD begins to decrease. If the AC
breaker was shut off, the LCD does not display. In this case, wait five
minutes.

When the DC voltage reaches a safe voltage then the PV connectors at the
input to the inverter can be disconnected. A galvanic separation then exists
between the PV array and the inverter.
The disconnection is safe even under single fault conditions.
WARNING!
The Safe DC voltage is only guaranteed when using modules of up to:

95Voc when using the single phase inverter

70Voc when using the three phase inverter
SolarEdge Installation Guide – MAN-01-00057-2.0
Safe DC
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