Defence:Valve Regulated Lead Acid Battery Box BB3500 pages
Valve Regulated Lead Acid Battery Box
The Battery Box BB350A is one in the range of Gresham Power
Electronics’ battery boxes. It affords a secure means of housing
batteries which are used for backing up the ship’s main and other
supplies.
A control and monitoring enclosure is bolted to the top of the battery
box and the connections between the control enclosure and the main
battery enclosure are gas tight.
The maintenance free batteries selected are built in accordance with
BS 6290 Part 4 (1997) and have a 7 to 10 year design service life at
0
20 C. They are high integrity Valve Regulated Lead Acid cells.
Nominally 24 volt, continuous float and recharge should be in the
range 27.0V to 27.6V. A low ripple charger (such as in the Gresham
3RC range) should be employed in order to maintain battery life. The
battery endpoint is 21V.The nominal battery rating is 350Ah at 20°C.
The battery box is a custom built steel enclosure 1175mm x 850mm x
454.5mm overall dimensions that is designed to be mounted on Xmounts with top steadies. Protection level is to IP23.
BB350
Access for maintenance and repair is from the front via a removable
front panel.
The top mounted control and monitoring enclosure contains front
mounting panel meters, indicating lamps and the double pole
ON/OFF switch S1.
Louvres pressed outwards on the front panel allow cooling by natural
convection.
Electrical connections to and from the Battery Box are made on M8
(x1.25) studs for the main connections and to a terminal block for
remote sense indications. The studs and terminal block are situated
in the main battery enclosure. Access to the studs and terminal block
is gained via a gland plate which is situated on top of the main
enclosure behind the control and monitoring enclosure.
An M10 external earth stud is provided on the top of the enclosure
adjacent to the gland plate.