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Installation and Operation Manual for Inverter RPI M50A_12s V1 EU EN 2017-03-09
5 Planning installation
5.12 Using external grid and system protec-
tion
1. The German standard VDE-AR-N 4105, Section 6.1, requires
external grid and system protection with a coupling switch for
PV system larger than 30 kVA.
2. Alternatively, VDE-AR-N 4105, Section 6.4.1, allows the
use of an inverter with an internal coupling switch when this
switch disconnects the inverter from the grid in less than
100 ms.
This inverter satisfies the requirements of (2) when the following
firmwareversionsareinstalled:DSP≥1.30/
RED≥1.20/COMM≥1.10.Externalgridandsystemprotection
is not necessary for inverters with these firmware versions.
5.13 Connecting a PC
The inverter settings can be changed using a PC. This requires
the following accessories.
Accessories Description
Standard USB/RS485 adapter
For connecting a PC to the
inverter
Delta Service Software
For changing the inverter
settings
The Delta Service Software can be downloaded from www.
solar-inverter.com.
Cable requirements
Bell wire. Both ends open.