Technical CATERPILLAR – 1000 kVA Page
8
Description UTILITY POWER MODULE
Revision 1.0 1 May 2006
3. CATERPILLAR
®
SR4B
®
693 FRAME GENERATOR
3.1. Specifications
Type: Revolving field, solid-state automatic voltage regulator.
Construction: Two bearing close coupled – 693 frame 4 pole, three phase,
wye connected.
Insulation: Class H rated at class F.
Enclosure: Drip proof IP 22, guarded.
Overspeed capability: 150%.
Waveform: Less than 5% deviation.
Paralleling capability: Standard with adjustable voltage droop.
Voltage regulator: 3-phase true RMS sensing with adjustable Volts-per-Hertz
response.
Voltage regulation: Less than ± 0.5%.
Voltage gain: Adjustable to compensate for engine speed droop and line loss.
THD: Less than 3%.
TIF: Less than 50.
Number of leads: 6
Excitation: Permanent magnet.
Fig. 3.1. SR4B Generator
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