10
INV250 / INV350 / INV500
02.2020
DC connector PV-
DC connector PV+
Climatic membrane
AC connecor
8.1.2 Connection ranges of the RS485 devices
DC connector PV-
DC connector PV+
RS 485 interface 1
RS 485 interface 2
AC connecor 1
AC connecor 1
Climatic membrane
8.2 AC connection
The circuit to which the inverters are connected must be fused
with a maximum of 16A. In addition, an earth leakage circuit
breaker of min. type A must be provided in the installation.
If several inverters are to be operated on one AC connection, the
total current must not exceed the current of the fuse. ( max. 16A)
DO NOT exceed the maximum permitted number
of inverters in an AC circuit as specified in chapter
8.2.1.
Open AC connections at the end of an AC circuit must be closed
with a protective sealing cap.
To
achieve protection class IP65/IP67, all plugs and
sockets must be plugged in with the respective
mating plugs or closed with protective caps.
If the line resistance is high, i.e. if the line length is long on
the AC side, the voltage at the mains terminals of the inverter
increases during feed-in operation.
This voltage is measured by the inverter. If the voltage at the
grid terminals exceeds the limit for grid overvoltage, the inverter
switches off due to grid overvoltage.
This circumstance must be taken into account in the AC wiring
and when dimensioning the AC line.
When using several AC circuits in a PV system, it is necessary to
distribute the feed-in phase symmetrically to the three-phase
grid.
If the PV system consists of more than one inverter, the
individual inverters can be connected via connecting lines:
PIN L
L1 (brwon)
PIN N
N (blue)
PE (green-yellow)
Make sure that you use sufficiently large cable
cross-sections to avoid excessive line resistance
between the house distribution and the respective
inverter.
The plug can accommodate a conductor cross-section of
0.25mm² - 1.5mm² for a flexible cable with wire end ferrules up
to 1.0mm². Please note the resulting maximum cable length.
Make sure that you use sufficiently large cable cross-sections to
avoid excessive line resistance between the house distribution
and
the
respective
inverter.