Generac Power Systems 53187 User Manual
Page 9
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PART 1
THE REVOLVING FIELD AC GENERATOR
1
SECTION 1.2
HOW A GENERATOR WORKS
Operational Analysis- Units with 15 Inch Stator Laminations
Som e differences exist betw een generator m odels
having a 10 inch diam eter stator and those w ith a 15
inch diam eter Stator. You m ay w ish to review "IDENTI
FYING UNITS BY STATOR DIAMETER" on Page 1:1-
1
.
Figure 6 is an Operating Diagram for NF eries
generators w ith a 15* inch diam eter stator. T
units
are equipped w ith a Part No. 67680 voltagi n re-
w hich requires 240 volts AC sensing. Tf ram ,
SENSING
TRANSFORMER
serves
to
itor’s
stator’s line-to-neutral sensing voltage to 24 ts.
Figure 7. Voltage Regulator Part No. 67680
m
A
= EXCITATION W INDING
B
= STATOR AC POW ER W INDING
C
= STATOR AC POW ER W INDING
CB1
= MAIN CIRCUIT BREAKERS
CB4
=
EXCITATION
CIRCUIT
BREAKER
TP = THERMAL PROTECTOR
Operating Diagram - Units w ith 15 Inch Diam eter Stator Lam inations
PAGE 1.2-3