Generac Power Systems CorePower User Manual

PART 2
AC GENERATORS
Page 23
PART 2 – AC Generators ....................................................23
Section 2.1 – Description and Components
.......................24
Introduction
.......................................................... 24
Engine-Generator Drive System ............................. 24
Alternator Assembly ............................................. 24
Brush Holder and Brushes
.................................... 24
Other AC Generator Components
.......................... 25
Section 2.2 – Operational Analysis .................................... 26
Startup ................................................................. 26
On-Speed Operation .............................................. 26
Field Excitation ...................................................... 26
AC Power Winding Output ..................................... 26
Section 2.3 – Troubleshooting Flowcharts .........................27
Introduction .......................................................... 27
Problem 1 – Generator Produces Zero Voltage
or Residual Voltage ............................................... 27
Problem 2 – Generator Produces
Low Voltage at No-Load ........................................ 28
Problem 3 – Generator Produces
High Voltage at No-Load ....................................... 29
Problem 4 - Voltage and Frequency
Drop Excessively When Loads Are Applied ............ 29
Section 2.4 – Diagnostic Tests .......................................... 30
Introduction
.......................................................... 30
Safety ................................................................... 30
AC Troubleshooting............................................... 30
Test 1 – Check Main Circuit Breaker ...................... 30
Test 4 – Fixed Excitation /Rotor Amp Draw Test ..... 30
Test 6 – Resistance Check of Rotor Circuit ............ 32
Test 7 – Check Brushes and Slip Rings
................. 32
Test 9 – Test the Stator ......................................... 33
Test 10 – Test Rotor Assembly .............................. 34
Test 11 – Check AC Output Voltage ....................... 34
Test 12 – Check AC Output Frequency ................... 34
Test 13 – Adjust Engine Governor ......................... 35
Test 14 – Adjust Voltage Regulator ....................... 35
Test 15 – Check for Overload Condition ................. 36
Test 16 – Check Voltage and
Frequency Under Load ........................... 36

Generac Power Systems CorePower Specifications

General

Brand	Generac Power Systems
Model	CorePower
Category	Portable Generator
Language	English