Generator AVR

The POPULACE SX460 AVR is a semiconductor-based precision automatic voltage regulator for brushless diesel generators up to 150kW, delivering ±1% RMS output voltage regulation through a closed-loop excitation circuit that responds to load changes in milliseconds, maintaining consistent power quality across variable load conditions. Jumper-selectable 120V/240V sensing and dual 50/60Hz operation make this SX460 AVR a direct-fit replacement for Newage and Stamford-style generator platforms with no rewiring or mechanical modification required, serving standby power, marine, construction, and telecommunications applications worldwide. Built with industrial-grade PCB components and integrated under-frequency roll-off protection, the SX460 AVR safeguards generator windings and connected equipment during engine speed transients, with on-board trimmers providing field-adjustable voltage, stability, and regulation settings. Each SX460 AVR carries a one-year manufacturer warranty covering material and production defects, with global air and sea shipping options supporting both single-piece urgent repairs and bulk distributor stocking orders from a direct-supply Xiamen factory source.

The R250 AVR is an analog transistor automatic voltage regulator designed for brushless SHUNT-excitation generators from 20kW to 100kW, maintaining output voltage within ±0.5% of setpoint through a closed-loop excitation circuit that responds directly to alternator output changes without processing delays — giving the fast dynamic response needed in standby and industrial prime power applications where loads step on and off unpredictably. A built-in Load Acceptance Module (LAM) with selectable 0%, 13%, and 25% levels dynamically relaxes the undervoltage trip threshold during heavy load acceptance, allowing the engine and governor to recover without nuisance shutdowns, while an on-board 1000Ω voltage trim potentiometer enables ±5% field output adjustment during commissioning. Compliant with IEC, VDE, NEMA, BS, CSA, and UL508 international standards, the R250 AVR is a direct OEM-fit and replacement regulator card for Leroy-Somer LSA 42.2, 43.2, 44.2, 46.2, and 47.2 series alternators across 50Hz and 60Hz configurations, making it the preferred stock item for generator service companies, distributors, and OEM manufacturers maintaining or assembling LSA-platform generator sets worldwide.

The AVR AS440 is a half-wave phase-controlled thyristor voltage regulator for brushless generator excitation, built on Surface Mount Technology to deliver output voltage regulation within ±1% under 4% engine governing, with jumper-selectable 120V/240V sensing and 50/60Hz frequency selection covering international grid standards from a single board variant. SMT board construction reduces through-hole component count for improved vibration resistance in engine generator environments, while integrated under-frequency rolloff protection with an LED status indicator guards the alternator from over-fluxing without requiring an external relay module. Designed for standby and prime power generators, off-grid industrial installations, parallel bus-tie systems, and alternator overhaul workshops, it serves genset OEMs, service distributors, and parts suppliers across Africa, the Middle East, Southeast Asia, and South America. Each unit is function-tested before shipment; the droop CT terminal enables reactive load sharing in parallel bus configurations, and the soft start ramp reduces alternator winding stress on every energization cycle.

The POPULACE SX440 automatic voltage regulator is a half-wave thyristor AVR for brushless generator sets from 50 to 300kW, covering 150kW diesel generators. The SX440 automatic voltage regulator controls output voltage to within 1%, with 20ms AVR response time. The SX440 automatic voltage regulator supports under-frequency protection, external trim, analogue remote control, and droop for parallel operation. POPULACE supplies the SX440 automatic voltage regulator as a Stanford SX440 compatible replacement, with 1-year factory warranty and worldwide shipping via FedEx, DHL, and UPS.

POPULACE GAVR-8A is a universal automatic voltage regulator for brushless generator excitation systems. Half-wave phase-controlled thyristor design with under-speed and sensing loss protection. Available in SMT, DIP, and DIP-Plus configurations. Factory direct from Xiamen, up to 15-month warranty.