Selecting A Residual Current Device (Rcd) - SolarEdge SE50K Installation Manual

Selecting a Residual Current Device (RCD)

IMPORTANT SAFETY FEATURE
All SolarEdge inverters incorporate a certified internal Residual Current Device (RCD) in order to
protect against possible electrocution and fire hazard in case of a malfunction in the PV array,
cables or inverter. There are 2 trip thresholds for the RCD as required for certification (DIN VDE
0126-1-1). The default value for electrocution protection is 30 mA per unit , and for slow rising
current is 300 mA per unit.
If an external RCD is required by local regulations, check which type of RCD is required for the relevant
electric code. Install the residual-current device (RCD) in accordance with the applicable local standards
and directives. SolarEdge recommends using a type A RCD. When required by local regulations, the use of
an RCD type B is permitted.
Use at least 600mA RCD for a 2 unit inverter and at least 900mA RCD for a 3 unit inverter.
NOTE
For multiple inverters, an RCD per inverter is required.
You have completed installing the system, proceed to the next chapter to activate and commission it,
then to Setting Up Communication on page 52, to s et up required communication options and to set up
master slave configurations, if required.
Extended Power Commercial Inverter Installation Guide MAN-01-00402-1.0
Chapter 4: Connecting the AC and Strings to the Connection Unit
33