Basic Electronics and Electrical Engineering: Chapter 4: Synchronous Machines
Load Characteristics of Alternator
Synchronous Machines
The following are the procedure for conducting the load test on 3ϕ Alternator.
LOAD
CHARACTERISTICS OF ALTERNATOR
The following are the
procedure for conducting the load test on 3ϕ Alternator.
1. Initially DPST and
TPST switches are kept open.
2. The generator is
driven by its prime mover at its rated speed.
3. By closing the DPST
switch, DC supply is given to field winding.
4. By varying the field
rheostat the rated line voltage across machine terminals at no load condition
is obtained.
5. By closing TPST
switch, 3ϕ‒star connected load is connected to alternator.
6. Now current, IL
flows through the load and it is noted.
7. The change in
terminal voltage plotted with respect to change in load current is called the
load characteristics of an alternator
8. The characteristics
curves are drawn between load current and load voltage.
9. The percentage
regulation is obtained from the formula (E0‒VL)VL
× 100
Basic Electronics and Electrical Engineering: Chapter 4: Synchronous Machines : Tag: Basic Engineering : Synchronous Machines - Load Characteristics of Alternator
Basic Electronics and Electrical Engineering: Chapter 4: Synchronous Machines
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