INSTALLATION
EN / DC Connection kit for solar electric applications / January 2011 / Copyright © 2011 Mastervolt
7
4.6 WIRING
INSTRUCTIONS
WARNING
High voltages (up to 600 VDC) may exist on
the PV-strings! Connection of the DC-cabling
may only be carried out if the DC-cables are
voltage free. Therefore the PV-modules must
be disconnected from the DC-cabling (for
instance by disconnecting the MultiContact
connectors at the PV-modules).
CAUTION!
•
Short circuiting, reversing polarity or
interchanging of PV-strings may lead to
damage to the DC Connection kit, the
Solar inverter, the cabling and/or the
terminal connections.
•
The maximum output current may not
exceed 30A for each output of the DC-
Switch.
•
If two ore more strings are connected to
the same Solar-input, both string lengths
must be equal.
•
Follow all steps of the installation
instructions in order of succession as
described.
•
During the entire installation the rotary
switch of the DC Connection kit must stay
in the O-position (OFF).
•
Do not change the existing wiring of the
DC Connection kit
Refer to chapter 6 for typical installation
examples.
<<<< TEXT REMOVED >>>>
4.6.1
Things you need:
To connect the DC Connection kit to the inverter you need
the following cables, long enough to reach from the DC
Connection kit to the inverter (not included with the
delivery)
•
Three double isolated DC cables with positive (+)
marking (e.g. red colour) ,
•
Three double isolated DC cables with negative (–)
marking (e.g. black colour)
4.6.2
Wiring between PV-modules and the DC
Connection kit
See figure 3. First make the connections to INPUT 1, and
then make the connections to INPUT 2, followed by INPUT
3.
1
Turn the rotary switch of the DC Connection kit to the
O-position (OFF).
2
Mount the DC Connection kit in a closed cabinet.
3
Strip approx. 10 mm of the DC-cables and connect
the cables as indicated.
4.6.3
Wiring between the DC Connection kit
and inverter
See figure 3. Follow in detail all steps of the installation
instructions in order of succession as described below.
1
Make sure the rotary switch of the DC Connection kit
is still set to the O-position (OFF).
2
Strip approx. 10 mm on both sides of the DC cables
3 Connect the DC cable with positive marking (+)
between the positive (+) connection of the OUTPUT
and the positive (+) DC Solar input of the inverter.
4
Repeat this for the negative (–) connection.
5
Repeat steps 3 and 4 to connect the OUTPUT 2 to
DC Solar input nr. 2 of the inverter.
6
Repeat steps 3 and 4 to connect the OUTPUT 3 to
DC Solar input nr. 3 of the inverter.
4.6.4
Connection to the safety ground (PE)
See figure 3. Connect the earth terminals of the varistors
to the safety ground (PE) as indicated. The wiring of this
connection should have a minimum cross section of 16
mm².
