Product Overview
OverviewTheSTAMFORD SX421 AVR (E000-24210/1P)is a high-performance three-phase sensed automatic voltage regulator specifically engineered for brushless generator excitation systems. This advanced AVR continuously monitors generator output voltage and automatically adjusts excitation levels to maintain stable, consistent power delivery across varying load conditions. Designed for both prime power and standby applications, the SX421 ensures your generator produces clean, regulated electricity that protects sensitive equipment and maintains operational reliability. Excitation power is derived directly from the generator terminals, and the unit features positive voltage build-up from residual levels, ensuring reliable starting and voltage establishment every time your generator starts.As an integral component of Stamford's renowned alternator excitation systems, the SX421 AVR incorporates multiple protective features that safeguard both the regulator and the generator itself. The sophisticated circuitry provides over-excitation protection, under-frequency roll-off, and voltage sensing accuracy that meets the demanding requirements of industrial, commercial, and rental power generation applications. Whether you're operating data centers, hospitals, manufacturing facilities, or providing emergency backup power, the SX421 delivers the voltage stability and protection features necessary for mission-critical applications. This genuine OEM Stamford component ensures full compatibility with factory specifications and maintains your generator's warranty coverage while delivering the performance reliability that Stamford alternators are known for worldwide.Key SpecificationsSpecificationValueModel NumberSX421 (E000-24210/1P)Sensing TypeThree Phase (3-Phase Sensed)Voltage Regulation Accuracy±0.5% steady stateInput Voltage Range170V to 265V ACFrequency Range50/60 Hz (±5%)Output PowerDC excitation field powerBuild-Up VoltagePositive from residual magnetismOperating Temperature-40°C
