Mass Combi Ultra, Mass Combi Pro
– Installation Manual Multiple Units
Three-phase configuration with MasterAdjust
15
5.3
DC wiring of three-phase units
Note:
Always use the same length positive and negative cables! Be aware that to keep the drawings in this chapter clear and
easy to read, the cable lengths have not been drawn in proportion to each other.
Power system
DC cable cross
section
Inline fuse
Recommended
battery bank
Indicated cable sizes are for cables from unit to
busbar and shorter than 3m. Cables from busbar
to battery bank should be twice the diameter.
When cables are longer than 3m, the size should
be increased to compensate for cable losses.
12V
95 mm2
350 A
800 Ah
24V
50 mm2
175 A
400 Ah
48V
35 mm2
80 A
200 Ah
5.4
AC wiring of three-phase units
Mains power cable cross section: 2.5 mm
2
Generator power AC cable cross section Breaker size
Max 10 kW
2.5 mm
2
25 A
11
– 20 kW
4.0 mm
2
40 A
21
– 30 kW
6.0 mm
2
50 A
> 30 kW
10.0 mm
2
63 A
FUSE
FUSE
BUSBAR
BATTERY
SWITCH
BATTERY BANK
L1
L2
L3
L1
L2
L3
* Neutral to ground bonding depending on local regulations
