Page 184 - CITS - Electrician - Trade Practical

ELECTRICIAN - CITS

MODULE 13: Synchronous Machines

EXERCISE 76 : Install an alternator and identify various

parts and terminals of the same

Objectives

At the end of this exercise you shall be able to:
• identify the prime mover and alternator mounting requirements
• identify terminals of alternator
• wire up the alternator and prime mover to a panel.

Requirements

Tools/Instruments
• Combination pliers 150mm -1 No. • Test lamp 60W -2 Nos.
• Side cutting pliers 150mm -1 No. • Multimeter Digital -1 No.
• Heavy duty screw driver 250mm -1 No. • Meggar 500v -1 No.
• Screw driver 100mm, 150mm -1No. each. Equipments/Machines
• D.E. spanner set 5 – 30mm -1 No.
• Electrician knife 75mm -1 No. • Alternator 5 KVA Alternator -1 No.
• DC Shunt motor 7.5HP 230V -1 No.
Procedure

TASK 1: Identify the prime mover and alternator mounting requirements
1 Record the name plate details of Alternator and AC induction motor [Depending on the availability of machines
available at lab, instructor need to modify the details of prime mover]

Sl. No Description Value
1. Make
2. Model
3. Serial number
4. No of phases
5. Voltage
6. Power
7. Frequency
8. Current
9. Class of insulation
10. Excitation voltage
11. Excitation current
12. Protection class

2 Identify the frame sizes of motor and alternator. Fig 1
3 Verify the mounting hole dimensions of the
motor – alternator set and prepare a template
for mounting Fig 1
4 Mount foundation bolts for coupled motor
alternator set
5 Mount the motor generator assembly on level
ground by foundation bolts erected.

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CITS : Power - Electrician & Wireman - Exercise 75