BANGLADESH POWER DEVELOPMENT BOARD TENDER ... - BPDB

- 125 V battery : 200 AHNumber of cells of each battery set shall be as follows:- for 125V battery set :Minimum 108 cellsCells shall be numbered consecutively and terminal cells marked to indicatepolarity.b. These batteries shall be used for supplying power for DC controls,alarms indication and for emergency lighting and power equipment to be installedwithin the power station.c. Each cell shall be sealed type, assembled in heat-resistant, shockabsorbing clear plastic containers with covers cemented in place to form apermanent leak proof seal. Vent plug and filler cap shall be provided in the cover.d. Separators between plates shall permit free flow of electrolyte.e. The weight of the battery elements shall be supported from ledgesmoulded in the jar walls or from the cover.f. Cell posts shall be sealed against electrolyte creepage.g. Cell terminal posts shall provided with connector clamps, bolts and nuts.h. Sufficient sediment space shall be provided so that the cells will not haveto be cleaned out during normal life.i. Electrolyte level limits shall be marked on the cell container.j. The battery shall be shipped uncharged with the electrolyte shipped inseparate containers.k. The battery shall be furnished complete with cell inter-connectors and atwo-step steel rack.l. The battery shall be suitable for operating satisfactorily in an ambient of45 0 C.10.2 BATTERY CHARGER(1) Scope of worksThe Contractor shall design, manufacture, deliver and install the battery chargers(Thysistor type), complete with all accessories, as specified, hereunder for theplant.The Contractor shall provide two (2) 125 V chargers, in the auxiliary room of thecontrol building to be used for automatic charging of 125 V. The electricalconnections between the batteries, the DC distribution boards and the chargersshall be as shown on the attached single line diagram. Only charger with fullyproven design shall be provided. The shall be capable of performing continuouslyGhorasal 200 MW to 300 MW Gas Turbine Peaking Power Plant Project (Vol-2 of 3)103