12
Quick Installation Guide for Solar Power Inverter M50A_12s EU V4 EN 2018-10-24
Important safety instructions
► Always follow the specific regulations of your country or
region
► Always follow the specific regulations of your energy pro-
vider
► Install all the stipulated safety and protective devices (such
as automatic circuit breakers and/or surge protection de-
vices)
► Protect the inverter with a suitable upstream circuit breaker:
Upstream circuit breaker
100 A
G N L1
L3
L2
N
L1
L2
L3
PE
to the
inverter
Residual current circuit breaker
Due to its design, the inverter cannot supply the mains 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
NOTICE
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, how-
ever, be less than the specified minimum tripping
current
Integrated residual current monitoring unit
The integrated, universal current-sensitive residual current moni-
toring unit (RCMU) is certified in accordance with VDE 0126
1-1:2013-08 §6.6.2.
Integrated string fuses and surge protection devices
► Replace damaged string fuses with devices of the same
type and from the same manufacturer
► Surge protection devices are available from Delta
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
AC 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
37 44 mm
Min /max Wire cross-section
25 35 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 diam-
eter:
● Cable material
● Temperature conditions
● Cable length
● Installation type
● Voltage drop
● Loss of power in the cable
► Always follow the applicable installation instructions for AC
cables
France: Follow the installation instructions 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 instructions of UTE 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 instructions of AS/
NZS 5033:2005. This standard contains the requirements for
minimum cable diameters and for avoiding overheating due to
high currents
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
Connecting the mains (AC)
