Delta RPI M50A Installation And Operation Manual

5 Planning installation
Installation and Operation Manual for Inverter RPI M50A_12s V1 EU EN 2017-03-09
30
5.6 AC connection (grid)
NOTICE
Ingress of moisture
If the fuse box cover is removed, the protection
class is no longer IP65.
► Only remove the cover when the inverter is in
a dry environment.
5.6.1 Important safety instructions
► Always follow the specific regulations of your country or
region.
► Always follow the specific regulations of your energy provid-
er.
► Install all stipulated safety and protective devices (e.g. auto-
matic circuit breakers and/or surge arresters).
► Protect the inverter with a suitable upstream circuit breaker:
Circuit breaker circuit breaker 100 A
G N L1 L3L2
N
L1
L2
L3
PE
to the
inverter
Fig. 5.7.: Position of the upstream circuit breaker
1.1.1 Residual current circuit breaker
Due to its design, the inverter cannot supply the grid with DC
residual current. This means that the inverter meets the require-
ments of DIN VDE 0100-712.
Possible error events were assessed by Delta in accordance with
the current installation standards. The assessments showed that
no hazards arise from operating the inverter in combination with
an upstream, type A residual current circuit breaker (FI circuit
breaker, RCD). There is no need to use a type B residual current
circuit breaker.
Minimum tripping current of the type A residual
current circuit breaker
≥300mA
The required tripping current of the residual cur-
rent circuit breaker depends first and foremost
on the quality of the solar modules, the size of
the PV system, and the ambient conditions (e.g.
humidity). The tripping current must not, however,
be less than the specified minimum tripping cur-
rent.
5.6.2 Integrated residual current monitoring unit
The integrated, universal current-sensitive residual current moni-
toring unit (RCMU) is certified in accordance with VDE 0126 1-1/
A1:2012-02 §6.6.2.
5.6.3 Integrated string fuses and surge protec-
tion devices
► Replace damaged string fuses and surge protection devices
with devices of the same type and from the same manufac-
turer.
► Surge protection devices are available from Delta.
5.6.4 Cable requirements
The AC plug provided with the inverter has the following technical
characteristics:
AC connection
China Aviation Optical-Electri-
cal Technology Co.
PVE5T125KE36
Nominal current 100 A
Min./max. cable diameter 21,9 ... 44,7 mm
Min./max. Wire cross-section 25 ... 38 mm
2
Recommended torque for ter-
minal screws
3 Nm
The AC plug can only be used with a flexible copper cable.
Consider the following factors when calculating the cable diame-
ter:
● Cable material
● Temperature conditions
● Cable length
● Installation type
● Voltage drop
● Loss of power in the cable
► Always follow the installation regulations for AC cables appli-
cable in your country.
► France: Follow the installation regulations of UTE 15-712-1.
This standard contains the requirements for minimum cable
diameters and for avoiding overheating due to high currents.
► Germany: Follow the installation regulations of VDE 0100-
712. This standard contains the requirements for minimum
cable diameters and for avoiding overheating due to high
currents.
► Australia/New Zealand: Follow the installation regulations of
AS/NZS 5033:2005. This standard contains the requirements
for minimum cable diameters and for avoiding overheating
due to high currents.
5.6.5 Grounding the inverter
The inverter must be grounded via the PE conductor. To do this,
connect the PE conductor of the AC cable to the AC plug pin
provided for that purpose.

Delta RPI M50A Specifications

General

Brand	Delta
Model	RPI M50A
Category	Inverter
Language	English