3
SPECIFICATIONS
STANDBY 500 ekW 625 kVA
60 Hz 1800 rpm 480 Volts
CAT SR4B GENERATOR
Frame size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .499
Excitation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Self Excited
Pitch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.6667
Number of poles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Number of bearings . . . . . . . . . . . . . . . . . . . . . . .Single Bearing
Number of leads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Insulation .UL 1446 Recognized Class H with tropicalization and
antiabrasion
IP rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Drip Proof IP22
Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Pilot Shaft
Overspeed capability . . . . . . . . . . . . . . . . . . . . . . .125% of rated
Wave form . . . . . . . . . . . . . . . . . . . . . . . .Less than 5% deviation
Paralleling kit droop transformer . . . . . . . . . . . . . . . . . .Standard
Voltage regulator . . . . .3 Phase sensing with selectible volts/Hz
Voltage Regulation . . . . . . . . . .Less than +/- 1/2% (steady state)
Less than +/- 1% (no load to full load)
Telephone Influence Factor . . . . . . . . . . . . . . . . . . .Less than 50
Harmonic distortion . . . . . . . . . . . . . . . . . . . . . . . . .Less than 5%
CAT ENGINE
3456 ATAAC, 4-stroke-cycle watercooled diesel
Bore - mm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .139.70
Stroke - mm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .171.40
Displacement - L . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15.83
Compression ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16.1
Aspiration . . . . . . . . . . . . . . . . . . . . . . . . . .Air-to-Air Aftercooled
Fuel system . . . . . . . . . . . . . . . . . . . . . . . . . .Direct unit injection
Governor type . . . . . . . . . . . . .Caterpillar ADEM control system
CAT CONTROL PANEL
24 Volt DC Control
NEMA 1, IP22 enclosure
Electrically dead front
Generator instruments meet ANSI C-39-1
Terminal box mounted
Single location customer connector point
Consult your Caterpillar dealer for available voltages.
17 April 2002 10:34 AM
