BANGLADESH POWER DEVELOPMENT BOARD TENDER ... - BPDB

10 DC POWER SUPPLY SYSTEM10.1 BATTERIES(1) Scope of workThe Contractor shall design, manufacture, delivery to the site and install Two (2)sets of 125 V , Ni-Cd, Alkaline storage batteries, complete with all accessories, asspecified, hereunder for the plant.The Contractor shall provide two (2) sets of 125 V, Ni-Cd, Alkaline storagebatteries, complete with stands, inter-cell connections, battery moulded circuitbreakers and maintenance equipment. For design purposes the ambienttemperature in the battery room shall be taken to range from 10 0 C to 45 0 C. Eachbattery shall be associated with battery charger (s) and DC distribution board (s).The rated voltage at the batteries shall be 125 V. The Contractor shall furnishcharacteristics and performance curves of both for batteries and chargers.(2) Description of the EquipmentTwo (2) 125 V battery set for gas turbine generating units with stands andinternal connections.Two (2) sets of accessories comprising:Two (2) HydrometersTwo (2) cell voltmeters, plus / minus 3 V, portable type, accuracy Class 1.0complete with leads and probes.Two (2) - Alcohol -in - glass thermometers to cover the range 0 0 C to 55 0 COne (1) Supply of battery record log books for at least 15 separate recordings foreach batteryOne (1) Plastic case to contain the above accessories.Three (3) Connector bolt wrenches.One (1) set of electrolyte filling tools.(3) Technical descriptiona. The batteries shall be of the Ni-Cd, Alkaline. The cell containers shall be ofthe fully enclosed vented type made of transparent plastic material with clearlyvisible high and low electrolyte limits indelibly marked on the container. Each cellshall have a large electrolyte reserve capacity above the plates to allow forminimum maintenance, The Contractor shall determine the ampere-hour rating ofthe batteries based on the battery being capable of supplying the loads connectedto the associated DC busbar continuously for 5 (five) hours at 35 0 C without thevoltage dropping below 90 per cent of the nominal values. But the capacity of thebatteries shall not be less than followings.Ghorasal 200 MW to 300 MW Gas Turbine Peaking Power Plant Project (Vol-2 of 3)102