Automatic Transfer Switch (ATS) is an intelligent power switching device that continuously monitors the primary and backup power sources and automatically transfers the load to the backup supply when the main power fails, then switches back once normal power is restored, ensuring uninterrupted and reliable power delivery.
Sell-Best
Sell-Best is a specialist electrical and automation product distributor offering a broad portfolio of low-voltage devices, including Automatic Transfer Switches (ATS) across various voltage levels and 2P/3P/4P configurations. Their ATS solutions support automatic, manual, and remote control modes, fast switching between primary and backup sources, and intelligent remote monitoring and management, with the ability to restore power within 10 seconds after disruption, ensuring reliable continuity for critical applications. Sell-Best emphasizes direct factory sourcing, comprehensive warranty coverage, competitive pricing, and efficient global supply chain execution, making them a strong option for residential, commercial, and medium industrial dual-power switching needs.
GEYA
GEYA, a Chinese electrical equipment manufacturer, offers a broad ATS product range from compact DIN-rail models to isolation and controller-integrated versions, featuring dependable and efficient power switching, comprehensive protection functions, flexible control options, and remote monitoring capabilities, making them suitable for residential, commercial, industrial, and solar energy applications.
CSQ Electric
CSQ Electric positions its ATS solutions toward traditional power distribution and project-oriented applications, with a strong focus on robust construction, high-current switching capability, and mechanical reliability.
Rather than compact or residential-oriented designs, CSQ ATS products emphasize contactor- or breaker-based changeover mechanisms, clear source priority control, and stable long-term operation, making them suitable for low-voltage switchboards, complete panel systems, and emergency power installations in industrial and infrastructure environments.
CNC Electric
CNC Electric’s ATS products are engineered for industrial and mission-critical power continuity applications, offering both PC-Class and CB-Class designs with IEC 60947-6-1-compliant phase, over/under-voltage protections. Beyond automatic switching between primary and backup sources, their ATS models feature built-in RS485 communications with Modbus-RTU, enabling remote monitoring, configuration, and control. These capabilities make them well-suited for hospitals, commercial complexes, high-rise buildings, and other environments where uninterrupted power supply is essential.
Shanghai People’s Switchgear Factory
SRK Switchgear’s ATS products span a wide current range from single-phase to three-phase heavy duty (16 A – 3200 A) with 2-, 3-, and 4-pole options and carry CCC certification and ISO9001/ISO14001/OHSAS quality systems. These ATS units are designed for standardized electrical performance, wide current applicability, and dependable power source isolation, making them suitable for integration into low-voltage distribution panels and engineered power systems to automatically transfer between primary and backup power sources across industrial automation, equipment control, and large-scale project applications.
ONCCY
The ONCCY EATS2 ATS series consists of modular, DIN-rail mount automatic transfer switches with a nominal current range from 6 A to 63 A and compatibility with 50/60 Hz AC systems. These devices provide ultra-fast switching in under 50 milliseconds between primary and backup power sources to minimize interruption effects on sensitive loads (e.g., PV/storage systems, UPS, servers, and security systems). The series also offers complete source isolation and mechanical interlocking for enhanced operational safety and long-term reliability.
VIOX Electric
VIOX Electric’s ATS product range, such as the VOQ series, is engineered around microprocessor-based intelligent control and high-speed dual power switching, automatically detecting power source status and transferring within milliseconds. The series offers a broad current range (from 10 A up to 3200 A) with flexible installation options and integrates undervoltage/overvoltage protection, status indication, and self-diagnostics to enhance power continuity and field maintenance efficiency. These attributes make VIOX ATS well-suited for applications requiring high reliability, including data centers, hospitals, and commercial buildings.
WINTPOWER
WINTPOWER Technology Co., Ltd. is a China-based manufacturer of generators and power equipment whose Automatic Transfer Switch (ATS) offerings are designed as integrated power changeover solutions paired with generator sets, spanning a wide current range up to 3200 A. The ATS units incorporate intelligent controllers with mechanical and electrical interlocks to reliably monitor and switch between primary and standby power sources, and are engineered to coordinate with generator start/stop logic for seamless transition during power outages, making them suitable for generator-linked and engineered power system applications.
CHINT
CHINT is a major Chinese electrical manufacturer and power infrastructure solutions provider whose ATS content spans both educational insight and product engineering principles. Its NXZ Series Automatic Transfer Switches are engineered for three-phase four-wire power systems with continuous source monitoring and automatic changeover, built-in protections for under/over-voltage faults, and enhanced mechanical and electrical life for long-term reliability. CHINT emphasizes compliance with international standards and comprehensive performance metrics, making its ATS suitable for industrial, commercial, and residential distribution applications.
YUANKY
YUANKY Electric is an established Chinese electrical manufacturer founded in 1989 with integrated R&D, production, sales, and service capabilities, holding ISO9001 quality management certification. Its ATS offerings include PC-class dual-power automatic transfer switches (G-type, Q-type, etc.) spanning a wide current range from 16 A to 3200 A and designed with 690 V/800 V insulation rating and up to 8 kV withstand voltage for low-voltage distribution applications. YUANKY ATS products emphasize simple, robust construction, strong overload capacity, and long mechanical service life, making them suitable for industrial, commercial, and engineered dual-power switching installations.
Conclusion
In summary, China’s leading ATS manufacturers offer a broad and competitive range of solutions, from compact residential units to high-current industrial and mission-critical systems. Together, they combine robust hardware, intelligent control, and cost efficiency, providing flexible and reliable automatic power transfer solutions for diverse application needs.
