CATERPILLAR | 155-3835 | Digital Voltage Regulator

Product code: N/A

CATERPILLAR | 155-3835 | Digital Voltage Regulator

Original price was: ¥99,999.00.Current price is: ¥1,588.00.

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Detailed content

The CATERPILLAR 155-3835 Digital Voltage Regulator is a generator excitation control module designed to maintain stable output voltage for Caterpillar generator systems. It provides automatic voltage regulation, excitation control, and generator protection functions by adjusting the exciter field current according to generator operating conditions.

The 155-3835 regulator is part of the CAT Digital Voltage Regulator (DVR) family and is commonly used with CAT SR4/SR4B generator packages and marine auxiliary power systems. It supports three-phase voltage sensing, PMG input, and excitation output control for reliable generator operation in industrial and marine environments.

This voltage regulator is widely applied in diesel generator sets, offshore power systems, marine propulsion auxiliary generators, and industrial standby power equipment. It is supplied as a replacement component for maintaining existing CAT generator excitation systems.

📋 Product Datasheet

Parameter	Specification
Brand	CATERPILLAR
Model	155-3835
Series	CAT Digital Voltage Regulator (DVR) Series
Product Name	Digital Voltage Regulator
Part Number	155-3835
Product Type	Generator Excitation Control Module
Product Status	Used / New Open Box / Surplus Stock
Application	Generator Voltage Regulation, Excitation Control, Power Generation Systems
Compatible Generator Series	CAT SR4 / SR4B Generators
Voltage Rating	125–249 VAC Regulation Range
Sensing Voltage	200/240 VAC, 3 Phase, 50/60 Hz
PMG Input Voltage	70–120 VAC, 3 Phase
Battery Supply	24 VDC Nominal (30 VDC Maximum)
Exciter Output	12 ADC Continuous at 48 VDC
Forcing Voltage	84 VDC
Control Functions	Automatic Voltage Regulation, Excitation Adjustment, Generator Protection
Communication Interface	Configuration Dependent
Dimensions	Approx. 10.88 × 6.32 × 4.72 in
Weight	Approx. 3–4 kg
Origin / Place of Origin	United States
Installation Type	Generator Control Cabinet Mounted
Operating Environment	Marine / Industrial Power System
Discontinued Status	Legacy Product / Spare Replacement Available

❓ Common Questions & Answers

Q: What is the main function of CATERPILLAR 155-3835?
A: The 155-3835 regulates generator output voltage by controlling the excitation system, helping maintain stable electrical power output.

Q: Which equipment uses the CAT 155-3835 regulator?
A: It is commonly used on CAT generator systems including SR4 and SR4B generator applications.

Q: Is the 155-3835 a PLC module?
A: No. It is a dedicated generator excitation and voltage regulation device.

Q: What are common causes of voltage regulator failure?
A: Common issues include unstable DC supply, excitation circuit faults, overheating, voltage spikes, wiring problems, and aging electronic components.

Q: What should be checked before replacing the regulator?
A: Confirm the exact part number, generator model, sensing voltage, PMG input, excitation output rating, wiring connections, and parameter settings.

Q: Can CAT 155-3835 replace other voltage regulators?
A: Replacement depends on generator type, excitation system design, electrical ratings, and control cabinet configuration.

Q: What maintenance is recommended for this module?
A: Regular inspection of terminals, cooling conditions, excitation wiring, generator insulation, and operating voltage parameters helps improve system reliability.

Q: Is CATERPILLAR 155-3835 still manufactured?
A: It is considered a legacy CAT generator control component and is mainly maintained through spare-part channels.

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