Description
CATERPILLAR INC.
CAT REGULATOR AS
ITEM NUMBER: 235-5725-03
AUTOMATIC VOLTAGE REGULATOR
REV: H
9368100100
PAT. NO. 5,294,879
CONTROL POWER INPUT: 18-30 VDC , 5VA
1 PHASE POWER INPUT: 100-200 VAC, 50-400HZ
3 PHASE POWER INPUT: 80-280 VAC, 50-400HZ
SENSING INPUT: 90-600 VAC NOM, 50/60HZ
1 OR 3 PHASE 0.5VA
PARALLELING INPUT: 5A AC, 50/60HZ, 0.2VA
ACC INPUT: -10 TO 10 VDC, 0.0012VA
OUTPUT: 63 VDC, 12A; 125 VDC, 10A
The Caterpillar 235-5725-03 REV H is an automatic voltage regulator that governs alternator excitation within a generator set’s automatic voltage regulator system, holding output voltage steady as switchboard load varies. It operates from 18-30 V DC control power and accepts single-phase power at 100-200 V AC or three-phase power at 80-280 V AC, both 50-400 Hz. Voltage sensing covers 90-600 V AC nominal on 1 or 3 phases, while the output is rated 63 V DC at 12 A or 125 V DC at 10 A. The unit is offered as new open box.
Key Features
✓ CAT regulator assembly, REV H
✓ Control power input 18-30 V DC, 5 VA
✓ 1 phase power input 100-200 V AC, 3 phase 80-280 V AC, 50-400 Hz
✓ Accessory input -10 to 10 V DC
✓ Output 63 V DC 12 A or 125 V DC 10 A
Marine Applications
✓ Ship service generator excitation control
✓ Generators running in parallel on the main busbar
✓ Standby and emergency generator sets
✓ Diesel-electric generator plant on offshore vessels
Technical Support
Prota Marine provides technical support, repair and onboard installation for the CAT automatic voltage regulator and the wider automatic voltage regulator system. Support includes fault diagnosis of excitation loss, voltage hunting and paralleling faults, along with commissioning support as the regulator is returned to service on the generator.
