All Industrial Transformers, Intelligent Soft Starters & Voltage Stabilizers

As an ISO-certified manufacturer and global B2B supplier in China, we produce the high-performance TSGC2 and TSGC2J Series Three-Phase Contact Voltage Regulator (1.5kVA to 30kVA). Built with premium toroidal loop cores and wear-resistant carbon brush assemblies, it delivers smooth, stepless 0V–430V AC output with zero waveform distortion and over 90% operating efficiency across demanding industrial, testing, and commercial applications. Supported by factory-direct wholesale prices, flexible MOQ, complete datasheets, and full OEM/ODM customization (custom voltages, motorized controls, and private labeling), our units provide global panel builders and project contractors with uncompromised reliability and rapid delivery. Request your instant wholesale quotation today!

As an ISO9001-certified China manufacturer and global B2B supplier, we deliver factory-direct TDGC2 and TDGC2J series single-phase contact voltage regulators (0.2kVA to 30kVA) engineered for precision voltage testing, industrial heating, and laboratory power control. With a 220V AC input, these toroidal autotransformers deliver smooth, stepless 0–250V output with zero waveform distortion and pure sine-wave integrity, ensuring high efficiency (>90%) and long-term durability. We provide low MOQ, wholesale pricing, flexible OEM/ODM customization, and comprehensive technical datasheets—contact us today for your tailored RFQ and fast worldwide shipping.

Engineered for mission-critical industrial and commercial equipment, the DJW/SJW series microcomputer non-contact compensation AC voltage stabilizer provides maintenance-free, sparkless power conditioning from 10 kVA to 1000 kVA with an ultra-fast < 0.2 s response time and ≥95% operating efficiency. As an ISO-certified China source manufacturer, we offer factory-direct wholesale pricing, low MOQ, and turnkey OEM/ODM customization for global grid voltages and extreme industrial environments. Contact our technical team today to request the engineering datasheet and get an instant, competitive factory quote.

Engineered for demanding industrial grids, the SBW Series High Power Compensation Voltage Stabilizer (30kVA–1000kVA) delivers heavy-duty power conditioning with ≥98% ultra-high efficiency, stepless voltage regulation, and zero waveform distortion (<1%). Uniquely designed to maintain 100% full rated output capacity even at the lowest input limit (304V), it provides robust multi-stage protection against over-voltage, over-current, and start-up phase sequence faults for precision CNC machinery, elevators, railways, and manufacturing plants. As an ISO-certified China manufacturer and source supplier, we support custom OEM/ODM engineering, low MOQ trial orders, and competitive factory-direct wholesale pricing. Contact us today for complete technical datasheets and instant B2B quotation.

Engineered by an ISO-certified China manufacturer, the YOF® TNS(SVC) Series Three-Phase High Accuracy Full-Automatic AC Voltage Stabilizer (1.5kVA–60kVA) delivers stable, ripple-free 380V ±3% power under severe grid fluctuations (280V–430V). With an independent Star (Y) phase-regulation architecture, pure sine-wave output with zero waveform distortion, >90% electrical efficiency, and <1 s rapid response, it ensures continuous 24/7 protection against overvoltage, undervoltage, and overcurrent for high-precision CNC machinery, industrial manufacturing lines, and laboratory equipment. With direct factory wholesale pricing, flexible MOQ, and full OEM/ODM custom engineering (voltage, frequency, branding), contact our engineering sales team today for a competitive bulk quotation and technical datasheet.

As an ISO-certified China source manufacturer, YOF supplies the TND(SVC) series of high-accuracy, fully automatic AC voltage stabilizers (500VA–30kVA), featuring advanced servo-motor drive and linear IC control to deliver continuous $\pm 3\%$ stabilization precision with zero waveform distortion. Specifically built to protect industrial automation, precision test instruments, medical systems, and office electronics from line voltage fluctuations, our single-phase automatic voltage regulators (AVR) provide comprehensive overvoltage, overload, and time-delay protection. Backed by flexible OEM/ODM customization, competitive wholesale factory pricing, low MOQ, and rapid global delivery, we offer direct engineering support—contact our team today for an instant B2B quotation and complete product datasheet!

Direct factory supply from China: YOF® Type A bypass intelligent soft starter delivers reliable smooth starting and deceleration for 3-phase induction motors from 5.5kW to 630kW (380V). Engineered with dual anti-parallel thyristors, an intelligent delay bypass contactor control, 12-fold digital comprehensive motor protection, and Modbus RS485 integration, it minimizes inrush mechanical stress and grid shock across pumps, fans, compressors, and crushers. Backed by ISO9001 and CCC standards with flexible OEM/ODM customization, low MOQ, and rapid worldwide shipping, request your bulk wholesale quote today.

Engineered by China · Yongfan Electric Co., Ltd. (YOF®)—an ISO certified industrial manufacturer, factory, and wholesale supplier—the YFX01 Series Auto-Voltage Reducing Starting Box (10kW–320kW) provides reliable step-down starting and robust overload, under-voltage, and phase-failure protection for three-phase induction motors up to 660V. Compliant with GB14048.4 and JB/T8752 industrial standards with dual 65%/80% autotransformer voltage taps, this heavy-duty enclosed starter is optimized for continuous and intermittent commercial duty in pumps, blowers, and air compressors. We support custom OEM/ODM specifications, private label solutions, rapid technical datasheet support, flexible low MOQ, and competitive factory-direct pricing for global bulk orders.

Engineered by China’s premier electrical manufacturer, the YOF® Bypass Type Intelligent Soft Start Cabinet (5.5kW–630kW) delivers high-efficiency reduced-voltage motor control for heavy-duty industrial fans, pumps, compressors, and conveyors. Integrating an intelligent digital soft starter with an MCCB breaker, an automatic AC bypass contactor, and an arc-suppression "delay bypass switch", it guarantees minimal thermal dissipation during steady-state operation alongside comprehensive 12-fold motor protection. Fully compliant with GB14048.6-2008 and IEC 60947-4-2 standards under ISO9001 and CCC certifications, we offer factory-direct wholesale pricing, custom OEM/ODM engineering, flexible MOQ, and complete technical datasheets. Request an instant factory quote today to elevate your industrial motor control projects.

Engineered for heavy-duty 3-phase 380V motor control from 5.5kW to 630kW, this high-performance online intelligent soft start cabinet utilizes advanced SCR thyristor solid-state switching to deliver full-time online operation without external AC bypass contactors. Featuring 1/3 the weight and 1/2 the volume of traditional autotransformer starters, intuitive potentiometer screwdriver tuning, and 21 comprehensive motor protection parameters, it ensures zero arcing, minimal maintenance, and stable starting even under low line voltages ($\ge 320\text{V}$) and harsh industrial environments. As a leading China electrical manufacturer with ISO9001 and CCC certification, YOF® provides factory-direct wholesale pricing, OEM/ODM custom switchgear solutions, fast-dispatch MOQ, and full technical datasheets—contact our engineering team today for an immediate RFQ quote.

Manufactured in China by Yongfan Electric (YOF®), an ISO9001 & CCC certified manufacturer, factory, and global supplier, this 5.5kW–630kW Online Intelligent Soft Starter (380VAC 50/60Hz) features a 3-in 3-out full-time online SCR structure that requires no external AC bypass contactor—cutting switchgear cabinet wiring costs while ensuring reliable continuous operation with high-power forced air cooling and 7 built-in motor protections (phase loss, unbalance, locked-rotor, over/under-voltage, overheat, RS485 & 4–20mA). Built for industrial and commercial water/fire/sewage pumps, fans, air compressors, crushers, and mining machinery, we support custom OEM and ODM branding, full technical specification and datasheet support, flexible MOQ, and factory-direct bulk wholesale pricing—contact us today for an instant bulk order quote.

Manufactured in China by Yongfan Electric (YOF®), an ISO9001 & CCC-certified factory and global supplier, this intelligent motor soft starter combines microprocessor SCR thyristor drive, fuzzy PID closed-loop control, and LCD keypad operation for 380V±15% (220V/660V optional) 50/60Hz three-phase squirrel-cage asynchronous motors. Available in Bypass (Type A/B), Online (Type C/D), and Built-In Bypass (Type E) configurations compliant with GB14048.6 / IEC60947-2-2, it delivers smooth soft start, soft stop, light-load energy saving, and 12 built-in motor protection functions for industrial and commercial water pumps, fans, compressors, and crushers. We support bulk wholesale and custom OEM/ODM cabinet projects—contact us today for the full specification datasheet, flexible MOQ, and a direct factory quote.