INSTALLATION
18 May 2010 / Mass Combi 12/2500-100; 24/2500-60; 48/2500-35; 48/5000-70 / EN
5.3.2 DC wiring
Keep in mind that high current will pass through the DC
wiring. Keep the cable length as short as possible, this will
keep the system efficiency as high as possible. See
section 10.1 Specifications for recommended DC wire
sizes.
Use cable lugs terminals on the ends of the wires. These
lugs should be crimped with a proper crimping tool. Use
the following wire colours for DC wiring (refer to local
rules):
Wire color Meaning
Must be
connected to:
Red Positive + (POS)
Black Negative – (NEG)
Lay the positive and negative cables next to each other to
limit the electro magnetic field around the cables. The
negative cable should be connected directly to the
negative post of the battery bank or the ground side of a
current shunt. Do not use the chassis frame or hull of the
ship as the negative conductor. Tighten connections
securely (15 - 20 Nm / 130 - 175 In-Lbs.). The positive
battery cable must be fused according to local applicable
regulations and connected to the positive post of the
battery bank.
See section 10.1 Specifications for recommended fuses.
The fuse with the fuse-holder is available from your local
Mastervolt distributor or Customer Service Representative.
5.3.3 AC safety grounding
WARNING
The ground wire offers protection only if the
cabinet of the Mass Combi is connected to the
safety ground. Connect the earth terminal (PE
/ GND) to the hull or the chassis.
CAUTION!
For safe installation it is necessary to:
• connect the neutral conductor (N) of the AC
output to the earth (PE / GND), only during
inverter operation of the Mass Combi;
• insert a Residual Current Device (earth leakage
switch) of 30mA in AC output “SHORT BREAK”
of the Mass Combi.
• Insert a Residual Current Device (earth leakage
switch) of 30mA in AC input of the Mass Combi.
Refer to local regulations on these issues!
For safety purposes the neutral conductor (N) of the AC
output must be connected to the earth (PE / GND) when
the Mass Combi is in inverter operation. When utility
power is available on the AC input, and the Mass Combi is
in charger mode, this connection must be disabled again.
In some applications automatic connection between the
neutral conductor (N) and earth (PE / GND) is not required
or acceptable. Therefore the automatic connection
between the neutral conductor (N) and earth (PE / GND) is
disabled by default
To enable this automatic connection, see section 6.1.5
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