13-12-2012, 06:50 PM
PRESENTATION ON SUMMER TRAINING At GORAKHPUR RAILWAYS
PRESENTATION ON SUMMER TRAINING.pptx (Size: 580.95 KB / Downloads: 178)
INTRODUCTION
An alternator is an electromechanical device that converts mechanical energy to electrical energy in the form of alternating current.
A voltage regulator is an electrical regulator designed to automatically maintain a constant voltage level.
RESISTANCE CHECKING
Disconnect negative battery cable of the alternator. Connect Multimeter between cable and positive terminal of the battery.
OUTPUT CHECK
Ensure connections at battery,alternator & starter are clean & tight.Also ensure that alternators are properly grounded.
Connect Ammeter/Voltmeter or equivalent,following manufacturer’s instructions.
Repeat test at 2000RPM & alternator output should be 90-110amps or within 10% of manufacturer’s specification.
4.)DIODE ASSEMBLY BENCH TESTING
Place ohmmeter on scale & connect ohmmeter leads across positive terminal & each of the 3 stator terminals.
Connect ohmmeter leads across negative plate and each of the 3 stator terminals.
STATOR BENCH TESTING
Place ohmmeter on lowest scale & connect ohmmeter across stator leads.
Place ohmmeter on scale & connect ohmmeter between stator core & stator lead.
ROTOR BENCH TESTING
Place ohmmeter on lowest scale & connect ohmmeter across slip rings.