Specifications

NAIROBI OPERATIONAL HUB
UNOPS Building, UN Lane, Off UN Avenue Tel: [phone]
P.O Box 783,Village Market, 00621 E-mail: [e-mail]
Nairobi, Kenya Website: www.unops.org
UNOPS is ISO 9001 certified
g. Acceptable load power factor: 0.9 lag to 1
h. Acceptable overload:
60 sec : 150%
1 h : 110%
i. Acceptable crest factor without downgrading: Unlimited
j. Overall efficiency: up to 94%
4.10 Rectifier/Battery Charger
Incoming AC power shall be converted to regulated DC output by the
rectifier/battery charger. A phase controlled bridge rectifier shall provide
regulated DC voltage which is subsequently filtered to provide power for
the inverter and battery charging functions. The battery charging
circuitry shall be capable of being set for automatic battery recharge
operation, float service, manual battery charge service and equalize
operation.
The rectifier/battery charger shall have sufficient capacity to support a
fully loaded inverter and recharge the battery to 95% of its full nominal
capacity within 24 hours.
The charging current shall be automatically limited by an electronic
device to a maximum value as specified by the battery manufacturer.
Charger regulation shall ensure DC output fluctuation is less than 1% of
the DC voltage.
4.10 Battery
A. The Battery shall be of sealed lead acid type.
B. The Battery to be UL approved for UL standard (UL 924).
C. The Battery must carry a life time of 10 years.
D. The Batteries to be installed in separate stands or racks.
E. The backup time for the batteries will be normal time 10-15min.
Battery Specifications:
 High conductivity connectors & terminals.
 High Integrity pillar seal.
 Self regulating relief valve.
 Rugged super-thick positive plates.
 Balanced negative plates.
 Tough flame retardant cell box ( Thick Wall VO rated ABS)