11
Technical Data
MN019001EN
Effective November 2015
Bussmann series
PV Combiner box
EATON
www.eaton.com
Installation instructions
Please be advised that the unit may weigh up to 75kg. Please take
extra precaution when unpacking.
NOTICE
Unpacking and inspection
All Eaton’s Bussmann series combiner boxes are thoroughly
checked before they are packed and shipped. Although they are
shipped in sturdy packaging, damage can still occur during ship-
ping and delivery. It is important to carefully inspect the shipping
container and contents prior to installation. If you detect any
external damage after unpacking, report the damage immediately
to Eaton and the shipping company that delivered the unit.
If you require assistance in dealing with a damaged unit, please
contact Eaton on +44(0)1509 882699.
Electrical connections
Bottom entry
Example bottom end view of a combiner box fitted with MC4
connectors. Positioning on this face may vary dependent on
individual design. If the design was fitted with glands, these would
occupy the same area as the MC4 Connectors shown in the
diagram. Positive and negative inputs and outputs will be marked
accordingly on the outside of the combiner box.
End view
Connection points for bottom entry
Position
Item
Notes
A
IP65 rated breather drain
Relieves internal condensation
B
MC4 connectors or IP65
rated glands
To connect PV string cables
C
Output connection IP65
rated glands
For customer output cables
D
IP65 rated ancillary connec-
tion glands
One gland per connection where appli-
cable. May be used for wired communi-
cation entry points, PV DC earthing and
AC mains PSU where required.
Side entry
Example side entry view of a combiner box fitted with cable
glands. Positioning on this face may vary dependent on individual
design. If the design was fitted with MC4 connectors, these
would occupy the same area as the glands shown in the diagram.
m
CAUTION!
Connection points for side entry
Position
Item
Notes
A
IP65 Rated Breather Drain
Relieves internal condensation
B
MC4 Connectors or IP65
Rated Glands
To connect PV string cables
C
Output Connection IP65
Rated Glands
For customer output cables
D
IP65 Rated Ancillary
Connection Glands
One gland per connection where appli-
cable. May be used for wired communi-
cation entry points, PV DC Earthing and
AC Mains PSU where required.
Wiring preparation for gland inputs
In order to install PV cable where glands are specified, PV cable
must be stripped for a distance defined by the component of which
it is to be connected. This length is specified in the table below.
Component
Wire strip length (mm)
10x38 modular fuse holder (up to and including 20A
fuse rating)
9
14x51 modular fuse holder (25A, 32A fuse rating)
12
Once the cable has been stripped to the required length, it
may then be inserted through the gland and into the associated
modular fuse holder. The modular fuse holder must then be tight-
ened to the required torque specified on page 12 – Torque values.
MC4 connectors
Where a connection must be made use MC4 connectors, it must
be noted that the male connectors are mounted on the negative
input side and female connectors on the positive input side. This is
to match the PV panel MC4 output cables.
