BASLER ELECTRIC SR4A-2B15B3A | Static Voltage Regulator

🔹 Product Introduction

The Basler Electric SR4A-2B15B3A is a static voltage regulator designed for excitation and voltage regulation applications in synchronous generator systems. The SR4A family is used to regulate generator excitation by sensing generator voltage and controlling field power to maintain the required generator output voltage. The SR4A-2B15B3A configuration is specified for 120 VAC sensing, 50/60 Hz single-phase operation, with a 120 VAC, 840 VA single-phase power input and a 63 VDC, 7 A output rating. It is suitable for generator maintenance, excitation-system service, replacement applications, and industrial or marine power-generation equipment.

SR4A-2B15B3A

📋 Product Datasheet

Parameter	Value
Brand	Basler Electric
Model	SR4A-2B15B3A
Series	SR4A
Product Name	Static Voltage Regulator
Place of Manufacture	United States
Product Status	Used / Previously Installed; condition should be verified before installation
Dimensions	Not specified in the available product data
Weight	Approximately 5.35 kg
Original Country of Origin	United States
Power	120 VAC, 840 VA, 50/60 Hz, single phase; output 63 VDC, 7 A

The SR4A product family is intended for generator excitation and voltage regulation. Basler’s current SR4A retrofit documentation identifies the SR4A as a voltage-regulator model for conventional brush or brushless synchronous generators.

🔧 Troubleshooting & Common Issues

• If generator voltage is unstable, check the sensing input, excitation wiring, generator output connections, and regulator adjustment settings.

• If there is no excitation output, verify the regulator power input and inspect the field circuit, terminals, fuses, and associated excitation components.

• If the output voltage is too high or too low, confirm that the sensing voltage configuration matches the generator system.

• If the regulator does not respond correctly, inspect terminals and connectors for loose, oxidized, or damaged contacts.

• Before replacing the regulator, check the generator field winding and related excitation components to avoid replacing a functional regulator.

• Confirm the complete SR4A-2B15B3A model number before installation because different SR4A configurations can have different sensing and power-input characteristics.

⚠️ Safety Precautions

• Disconnect and isolate the generator and regulator from all hazardous voltage sources before servicing.

• Follow the generator manufacturer’s lockout/tagout procedures.

• Allow stored electrical energy to discharge before opening or removing the regulator.

• Use appropriate electrical test equipment and personal protective equipment.

• Do not change sensing or excitation connections while the generator is energized.

• Verify polarity, voltage, frequency, and terminal connections before applying power.

• After replacement, perform controlled voltage and excitation checks before returning the generator to normal operation.

📰 Product-Related News & Industry Context

Basler Electric continues to provide excitation and voltage-regulation solutions for generator systems. The company’s current SR4A Retrofit product is specifically described as a direct replacement for existing Basler SR4A regulators and is designed for brush and brushless synchronous generators. The retrofit platform supports single- or three-phase sensing and functions including reactive droop compensation, line-drop compensation, underfrequency protection, and compatibility with excitation-related control devices.

❓ Q&A

Q: What is the Basler Electric SR4A-2B15B3A?

A: It is a Basler Electric SR4A series static voltage regulator used for generator excitation and voltage regulation.

Q: What is the sensing configuration?

A: Available product information identifies the SR4A-2B15B3A with 10 VA, 50/60 Hz, single-phase sensing.

Q: What is the power input rating?

A: The listed configuration uses 120 VAC, 840 VA, 50/60 Hz, single-phase power input.

Q: What is the output rating?

A: The listed output rating is 63 VDC at 7 A.

Q: What type of generator can use the SR4A family?

A: The SR4A family is designed for synchronous generators, including conventional brush and brushless excitation systems.

Q: Is SR4A-2B15B3A discontinued?

A: The original SR4A product configuration should be treated as an older/legacy regulator for replacement planning. Basler currently offers an SR4A Retrofit product intended as a direct replacement for existing SR4A regulators.

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