Generator Automatic Voltage Regulator Stabilizer Model SX460

Description

Generator Automatic Voltage Regulator Stabilizer Model SX460

The SX460 is a classic and widely used automatic voltage regulator (AVR) module, primarily designed for brushless generators (often Stamford, Leroy Somer, Marathon, and similar types). It’s known for its reliability and simplicity. Generator Automatic Voltage Regulator Stabilizer Model SX460

Here’s a comprehensive breakdown of the SX460 AVR Stabilizer.

Primary Function

The SX460 automatically regulates the generator’s output voltage by controlling the excitation current to the exciter field of the generator. It ensures the main output voltage remains stable (typically at 120V, 240V, or 400V AC, depending on setting) despite changes in the load or engine speed.

Key Features & Specifications

• Input Power Supply: 190-264V AC (single-phase, from the generator’s own output or auxiliary winding). It’s designed to be powered from the generator it regulates.

• Sensing Input: 190-264V AC, single-phase. Monitors the generator’s output voltage.

• Output (Exciter Field): Maximum 90V DC, 4A continuous. This DC output goes to the generator’s exciter stator.

• Frequency Range: 50Hz or 60Hz, adjustable.

• Voltage Adjustment: Typically via a potentiometer on the AVR (±10% around the rated voltage).

• Stability: Usually within ±1% of the set voltage from no-load to full-load (with proper engine governor).

• Low-Voltage Protection: Often includes an under-frequency (UFRO) feature that reduces output voltage proportionally as engine speed drops, protecting connected motors.

• DIP Switches: Common for setting parameters like:

  • Voltage Level (e.g., 120V, 240V, 415V sensing).

  • Stability/Response (Fast/Slow).

  • Under-Frequency Roll-Off (UFRO) Enable/Disable.