TWO TO FOUR MASS GI’S IN PARALLEL (ADDITIONAL INFO)
16
June 2009 / Mass GI / EN
9 TWO TO FOUR MASS GI’S IN PARALLEL (ADDITIONAL INFO)
For shore connections of more than 16A (32A),
multiple Mass GIs can be used in parallel (maximum
four Mass GI 3.5 or two Mass GI 7.0/ Mass GI 7.0
MultiTap).
CAUTION!
In parallel, all inputs must be connected to
the same phase!
WARNING!
Never connect the output(s) to any other
power source!
See figure 12 for installation. Steps:
1.
Connect the MasterBus cable between the
communication ports on the Mass GI’s.
2.
Connect the AC load to the AC output on the
units (figure 16).
3.
Connect the incoming shore power to the AC
input on your Mass GI’s. Phase line to L, Neutral to
N, and Ground to PE (figure 17).
9.1
Installation of four Mass GI’s in parallel
(Mass GI 3.5 only)
Extra materials needed for 4 Mass GI’s: 16 screws
(with rings and plugs), size m8. Use suiting materials
to carry the weight of the Mass GI.
If you have more than four Mass GI’s to put in
parallel, you need to install two groups, using
manual setup.
To achieve maximum performance all input
and output wiring must be of equal length.
For more than two Mass GI’s we
recommend a star configuration like shown
in figure 12.
Figure 12: Parallel connection of four Mass GI 3.5 in one group
9.2
Parallel operation in one group
In one group all Mass GIs in the MasterBus network
run in parallel. Parallel configuration is done
automatically via MasterBus communication. When
two, three or four units are detected in a MasterBus
network, the system assumes that these operate in
parallel.
9.3
Multiple groups of Mass GI(s) in parallel
With more than four Mass GI’s in parallel you need
more than one group. For example 8 Mass GI’s can
be configured as two groups of four Mass GIs
running in parallel. In this situation additional
configuration of the system is required. Per group of
GI’s one of the units needs to be assigned the status
of Master. In “Configuration” > “Parallel” one should
select “Master”. After this action the required number
of Mass GIs can be selected to run in parallel to the
Master via selection in Product 1, Product 2, Product
3 and Product 4. Note Product 1 is the product that
was selected as Master.
Rename Mass GIs before configuring
multiple groups of GIs. For example
“Transformer 1” etc.
If the automatic paralleling of Mass GI’s is
not desirable, select “Master” on the units
in parallel configuration and do not select
additional products to run in parallel. This
effectively creates single units that will not
switch to parallel mode automatically.
Input 2.5 mm
2
Output 2.5 mm
2
MasterBus
Input from shore power 10 mm
2
Output to loads 10 mm
2
M
ASTERVOLT
M
ASTERVOLT
Mass GI 14
MV Easy
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