Baldor GLC10 Installation & Operating Manual

Contents

Baldor GLC10 Installation & Operating Manual Manual pdf 23 page image

General Information 2‐13MN2408Battery ChargerAn engine mounted alternator charges the batteries during engine operation. Standby gensetsshould include a solid state battery charger that is connected to utility power so the battery ischarged continuously while the genset is not running. The battery charger should be connectedto the utility power emergency circuit. The batteries on prime power gensets are charged by theengine mounted alternator, if equipped.The output of the battery charger or the belt driven alternator must be connected directly to thebattery or to the battery terminals on the starter to prevent the electronic governor from actingerratically. Make control connections to the genset control using a conduit with a flexible sectionat the genset to avoid damage due to genset vibrations.Battery CablesThe wire size (wire gauge) of the cables connecting the starter to the batteries must be largeenough to ensure proper voltage at the engine starter motor during cranking. The total crankingcircuit resistance includes the resistance of the cables from the starting motor to the battery andthe resistance of all relays, solenoids, switches, and connections. The resistance of various sizesof cables is shown in Figure 2‐10. For purposes of calculating cranking circuit resistance to selectcable size, the resistance of each connection can be taken as .00001 ohms and the resistance ofeach relay, solenoid, and switch can be taken as .0002 ohms. Figure 2‐10 illustrates an exampleof a typical cranking circuit resistance calculation.Figure 2‐10 Typical Battery Cable Calculations