Contents
SPECIFICATIONS..................................................... 4
Generator ................................................................ 4
Stator Winding Resistance Values/
Rotor Resistance ..................................................... 4
Engine ..................................................................... 5
Fuel Consumption ................................................... 5
Mounting Dimensions ........................................... 6-7
Major Features ........................................................ 8
PART 1 - GENERAL INFORMATION ....................... 9
1.1 Generator Identification ................................... 10
1.2 Prepackaged Installation Basics ..................... 11
Introduction ......................................................11
Selecting A Location ........................................11
Grounding The Generator ................................11
The Fuel Supply ...............................................11
The Transfer Switch / Load Center ...................11
Power Source And Load Lines .........................13
System Control Interconnections .....................13
1.3 Preparation Before Use ................................... 14
General ............................................................14
Fuel Requirements...........................................14
Fuel Consumption ............................................14
Reconfiguring The Fuel System .......................14
Engine Oil Recommendations .........................16
1.4 Testing, Cleaning and Drying........................... 16
Meters ............................................................17
The VOM ..........................................................17
Measuring AC Voltage .....................................17
Measuring DC Voltage .....................................17
Measuring AC Frequency ................................17
Measuring Current ...........................................18
Measuring Resistance .....................................18
Electrical Units .................................................19
Ohm's Law .......................................................19
Visual Inspection ..............................................20
Insulation Resistance .......................................20
The Megohmmeter...........................................20
Stator Insulation Resistance Test .....................21
Rotor Insulation Resistance Test ......................22
Cleaning The Generator...................................22
Drying The Generator ......................................22
1.5 Engine-Generator Protective Devices ............. 23
General ............................................................23
Low Battery ......................................................23
Low Oil Pressure Shutdown .............................23
High Temperature Switch .................................23
Overspeed Shutdown ......................................23
RPM Sensor Failure .........................................23
Overcrank Shutdown .......................................24
1.6 Operating Instructions ..................................... 25
Control Panel ...................................................25
To Select Automatic Operation ........................26
Manual Transfer To “Standby” And
Manual Startup ....................................26
Manual Shutdown And Retransfer
Back To “Utility” ....................................27
1.7 Automatic Operating Parameters .................... 28
Introduction ......................................................28
Automatic Operating Sequences .....................28
PART 2 - AC GENERATORS .................................. 29
2.1 Description and Components .......................... 30
Introduction ......................................................30
Engine-generator Drive System .......................30
The AC Generator ............................................30
Rotor Assembly ................................................30
Stator Assembly ...............................................31
Brush Holder And Brushes ..............................31
Other AC Generator Components ...................31
2.2 Operational Analysis ....................................... 33
Rotor Residual Magnetism...............................33
Field Boost .......................................................33
Operation .........................................................34
2.3 Troubleshooting Flowcharts ............................. 35
Problem 1 - Generator Produces Zero
Voltage or Residual Voltage .......... 35-36
Problem 2 - Generator Produces
Low Voltage at No-Load ......................37
Problem 3 - Generator Produces
High Voltage at No-Load .....................37
Problem 4 - Voltage and Frequency Drop
Excessively When Loads are Applied .38
2.3 Diagnostic Tests .............................................. 39
Introduction ......................................................39
Safety ............................................................39
Test 1 - Check Main Circuit Breaker.................39
Test 2 - Check AC Output Voltage ....................39
Test 4 - Fixed Excitation Test/Rotor
Amp Draw Test ....................................40
Test 5 - Wire Continuity ....................................41
Test 6 - Check Field Boost ...............................42
Test 7 - Testing The Stator With a VOM ...........42
Test 8 - Resistance Check of Rotor Circuit ......44
Test 9 - Check Brushes and Slip Rings ............44
Test 10 - Test Rotor Assembly .........................45
Test 11 - Check AC Output Frequency.............45
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