AVR - SX440

Product Title:

Automatic Voltage Regulator (AVR) – SX440

Short Description:

High-performance AVR SX440 for brushless alternators. Ensures stable voltage output and protects sensitive electrical equipment.

Full Description:

The SX440 is a high-quality, analog-style automatic voltage regulator designed for brushless AC generators. It provides precise control of the alternator's output voltage by regulating the excitation current. The SX440 includes under-frequency protection, voltage adjustment, and stability controls, making it ideal for use in standby and prime power generator applications. It is widely compatible with Stamford and other compatible alternators.

• Model: SX440

• Type: Analog Automatic Voltage Regulator

• Voltage Sensing: 190V – 264V AC

• Power Input: 170V – 220V AC (single-phase)

• Output Voltage (to exciter field): Max 90V DC @ 207V AC input

• Current Output: Continuous 4A, short-term 7A for 10 seconds

• Regulation: ±1.0%

• Protection:

  • Under-frequency roll-off

  • Over-excitation limiting

  • Soft start voltage build-up

• Adjustable Features:

  • Voltage set point

  • Stability

  • Under-frequency protection

• Cooling: Natural air-cooled

• Mounting: Baseplate with 4 screws (standard AVR configuration)

• Applications: Diesel or gas generators (prime or standby)

• Compatible Brands: Stamford and Stamford-style alternators

Estimated Weight:

Approx. 0.8 – 1.2 kg