Table of Contents
Advertisement
Connecting the mains (AC) – general notes
ATTENTION
Ingress of moisture
If the wiring box cover is removed, the degree
of protection is no longer IP65.
► Only remove the cover when the inverter is
in a dry environment.
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 stipulated safety and protective devices (such as
automatic circuit breakers and/or surge arresters).
► Protect the inverter with a suitable upstream circuit breaker:
Upstream line protection
V/J N L1
L2
L3
► Selection of the protective devices for the network cable
to the transformer of the mains feed-in point: Always take
into account the impedance between the PE of the inverter
and the system and/or operational ground of the distribution
network. This applies in particular for TT and IT networks.
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
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.
30
Integrated string fuses and surge protection devices
► Replace damaged string fuses with devices of the same
► 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.
Permissible grounding systems
125 A
L3
L2
to the
L1
inverter
N
Grounding system
PE
Allowed
Requirements for the mains voltage
3P3W
L1-L2
L1-L3
L2-L3
L1-L2
L1-L3
L2-L3
Tools
Use an insulated torque wrench with an Allen key bit for the con-
tact screws.
≥300 mA
type and from the same manufacturer.
DANGER
Electric shock
In IT grids, a twofold insulation fault can lead to
high residual currents on the inverter housing.
► Ground the housing of the inverter via the
grounding connection.
► Set up a permanent insulation monitoring
system.
► The first time an insulation fault occurs,
this insulation fault must be rectified
immediately!
TN-S
Yes
Voltage range
400 V
± 30%
AC
400 V
± 30%
AC
400 V
± 30%
AC
480 V
± 20%
AC
480 V
± 20%
AC
480 V
± 20%
AC
Quick Installation Guide for Solar Power Inverter M88H EU V3 EN 5013240202 02 2018-03-22
TN-C
TN-C-S TT
IT
Yes
Yes
Yes
Yes
3P4W
Voltage range
L1-N
230 V
± 30%
AC
L2-N
230 V
± 30%
AC
L3-N
230 V
± 30%
AC
L1-N
277 V
± 20%
AC
L2-N
277 V
± 20%
AC
L3-N
277 V
± 20%
AC
Advertisement
Table of Contents
