Selectronic SP PRO - Page 11

IN0016 Revision 12 Part # 004573 – 11 of 22
POWER PERFORMANCE PASSION
SP PRO Three Phase
Installation Notes
All DC cabling between the battery bank and battery protection and the battery protection to
the 800A current shunt must be a minimum of 3 off 70mm
2
V90HT cables or equivalent. After
the DC battery protection and the current shunt the cables can be split into 3 circuits, each a
minimum of 70mm
2
V90HT cables. Each circuit is protected by a 250A HRC fuse or DC circuit
breaker.
All DC cabling must be protected at the battery bank by suitable 630A fuses.
Suitable Overcurrent Protection.
The table below gives options for suitable battery fuses and individual inverter fuse types
Circuit position
Rating and type
Suitable Type and brand
Main battery fuse
630A HRC
ABB OFAF3H630, OFAF4H630
Gave: 67320630 (DKSH)
or equivalent
Inverter fuses
250A HRC
ABB OFAF1H250, OFAF2H250
or equivalent
Inverter breaker
250A DC rated MCCB
Siemens 3VL37251DC360AA0
or equivalent
Pre-charge and Midpoint Wiring
The pre-charge and midpoint wiring should be wired as a bus arrangement and connected to
the battery via a common connection for all three phases. This will allow all three SP PROs to
be pre-charged together. The pre-charge and midpoint wiring must be protected by suitable
fuses or circuit breakers of sufficient capacity.
Installation of 800A current shunt
The Current shunt must be mounted on a vertical, non-flammable surface. The shunt must be
oriented as shown to allow free air convection over the fins. The shunt must be in free air to
enable adequate air flow around the shunt to keep it cool. If the shunt is mounted in an
enclosed area then forced air must be provided to cool the shunt.