Page 333 - CTS - Mechanic Diesel - TP

MECHANIC DIESEL - CITS

EXERCISE 18.4: Determine the load performance and

voltage regulation of a 3-phase alternator

Objectives

At the end of this exercise you shall be able to
• connect, start, run, and build up the voltage of an alternator
• connect the resistive, inductive load to the 3 phase alternator
• determine the voltage regulation of an alternator.

Requirements

Tools/Equipments Equipment/Machines
• Combinationpliers200mm - 1 No. • 3-phase alternator100 KVA
• Roundnosepliers150mm - 1 No. coupled with Diesel genset engine
• Electrician’sknife - 1 No. having facilityforspeedcontrol - 1Set
• M.I.ammeter0to20 amps - 3 Nos. • 3-phase lamp load 415/400V5KW - 1 No.
• M.I.voltmeter0to500volts - 1 No. Materials
• M.C.voltmeter0-300V - 1 No.
• M.C.ammeter0-5A • P.V.C.insulated stranded
• Frequency meter 500V,45 to 50Hz - 1 No. aluminium cable - 10 m
• Power-factormeter • T.P.I.C.switch32amps 500v - 2 Nos.
500V, +0.5to -0.5 P.F. - 1 No.
• Tachometer300to3000r.p.m. - 1 No.

Procedure

TASK 1: Connect,start,run,and build up the voltage of an alternator
1 Note down the name-platede tails of the given alternator in Table 1.
Table1
Name plate details

Manufacturer,Trade Mark: ....................................
Type,model or list number: ....................................
Type of Current : .................................... Fabrication or serial number :..........................
Function : .................................... Alternator :..........................
Type of connection : .................................... P.F. :.........................
Rated voltage : ...................................Volts Rated current :........................amps
Frequency : ..................................Hz Ratedspeed :.........................r.p.m.
Ratedpower : .................................kVA Ratedexc.current :.........................amps
Ratedexc.voltage : .............................Volts Directionofrotation :.........................
Rating class : ................................... Protectionclass :..........................
Insulation class : ...................................

316