Delta PhotoVoltaic RPI-C500, Manual

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I
NSTALLATION
G
UIDE
2
S
AFETY
S
YSTEM
U
SAGE
2. Safety
2.1. System Usage
See the system usage in the following diagram:
Figure 2-1. System Usage
External output transformer requirements
The external output transformer is used with separate primary and secondary
windings rated 500kVA minimum, and limited to a maximum impedance variance of
less than or equal to 6%. This external transformer is required to be located
between the output of the central inverter and the utility power connection.
For the application of MV transformer .Please refer to the Appendix C
“ Delta MV
transformer application note”.
2.2. Disconnecting
Isolation of the device must always occur under load-free conditions.
CAUTION!
R
ISK OF LETHAL ELECTRIC SHOCK
.
It is admitted to work on the PV Inverter only after switching the relative power sources.
The VDE regulations must be followed:
 Disconnect 
 Ensure that the device cannot be reconnected 
 Ensure that no voltage is present 
 Ground and short-circuit the unit if necessary (not on the DC side) 

If necessary, cover or shield any adjacent live components

The following power sources must be isolated:

Grid voltage for grid feeding


Grid voltage for internal power supply (optional)


DC voltage from the photovoltaic generator
