The 4th-generation EA660 series rack-mounted UPS systems are available with rated capacities of 200kVA, 300kVA, 400kVA, 500kVA, and 600kVA respectively. Developed and launched by EUE Power based on its latest R&D achievements and practical application experience, this is a brand-new, high-end three-phase in/three-phase out modular UPS.

The series adopts dual-DSP full digital control technology and components from world’s top-tier brands, which effectively enhances product performance and system reliability, while achieving integration and miniaturization with higher power density. A single module delivers up to 50kVA/50kW/3U, and a single unit can be expanded to a maximum of 600kVA.

Adopting a modular design and centralized control logic, the system features a 1+1 redundant centralized control unit. All modules, including power modules, bypass modules, and control modules, support hot-swappable operation. This truly delivers the advantages of a high-performance modular UPS: high reliability, high efficiency, easy management, and easy maintenance.

High Reliability

•Adopts advanced DSP digital control technology, with independent dual-DSP control for the rectifier and inverter

•Intelligent temperature-based fan speed regulation reduces operating noise and extends fan lifespan

•Excellent fault tolerance: the UPS can continue operating at 50% load with one fan failure, and at 30% load with two fan failures

•Triple-proof coating enhances environmental adaptability and supports long-term operation in harsh conditions

•Comprehensive hardware and software protection, powerful self-diagnosis, and rich historical event records ensure safe and reliable operation

•Advanced digital parallel technology improves overall system reliability compared with standalone UPS operation

High Usability

•Equipped with a 7-inch large color touchscreen and an intuitive, user-friendly HMI

•Powerful background software enables parameter configuration, online firmware upgrades, and system management

•Compact internal layout minimizes floor space, with a 300 kVA system occupying only 0.5 m²

•Hot-swappable modules allow fast and convenient on-site maintenance

•Integrated power distribution units simplify installation and help reduce initial investment

•Auto-aging function makes on-site commissioning and testing more efficient

High Availability

•Wide input voltage range and adaptive 50 Hz/60 Hz grid compatibility ensure reliable operation under various grid conditions

•Linear derating at low input voltage reduces battery discharge cycles and extends battery lifespan

•Flexible battery configuration supports 30–46 cells, helping optimize system cost

•Compatible with lead-acid and lithium iron phosphate batteries to meet different backup power requirements

•Battery cold start without mains power supports emergency power supply scenarios

•Configurable delayed restart after mains recovery reduces impact on the power grid or generator

•Frequency conversion mode supports 50 Hz input/60 Hz output and 60 Hz input/50 Hz output

•Standard maintenance bypass switch enables safe and convenient maintenance

Smart Monitoring & Management 

•Multiple communication interfaces, including RS485, RS485/CAN for BMS, NET with SNMP, dry contacts, Wi-Fi, and 4G cards, provide flexible and comprehensive UPS status monitoring

•With Wi-Fi or GPRS cards installed, users can monitor UPS operation in real time via the mobile app

•Intelligent battery management, including float voltage temperature compensation, automatic equalizing charge control, and charger sleep control, enhances charger reliability and helps extend battery lifespan

•Intelligent sleep mode maintains high operating efficiency under low-load conditions

Energy-Saving & Eco-Friendly

•Active Power Factor Correction (PFC) technology achieves an input power factor of up to 0.99, reducing grid pollution and improving power utilization

•High online efficiency reaches 96% at 30% load and 96.5% at 50% load, delivering outstanding energy-saving performance

•ECO mode enables operating efficiency of up to 99% under stable grid conditions, further reducing energy consumption and operating costs

Optional Accessories

•Standard configurations include RS485, RS485/CAN (BMS), NET (with SNMP function), input/output dry contacts and EPO.

•Optional components: parallel connection modules, LBS modules, Wi-Fi card, 4G card, and battery temperature sensor.

With dual DSP digital control and advanced soft-start technology, the system supports 1:1.1 generator matching and maintains high efficiency even under low-load conditions, reaching 96% efficiency at 40% load and 95% at 20% load.

An input power factor of >0.99, THDi of <3%, and intelligent hibernation mode help reduce energy consumption and extend equipment service life.

Flexible modular design

The system adopts high-power-density 50 kVA/3U modules, delivering a compact footprint of only 1.02 m² for a 500 kVA system.

It supports full hot-swapping, parallel expansion of up to 4 units, and battery sharing. Flexible charger and battery configurations, supporting 30–46 batteries, enable easy capacity expansion and cost optimization.

Strong grid adaptability

With a wide input voltage range, strong load adaptability and excellent overload capability, the system ensures stable operation in complex grid environments.

The integrated PDU simplifies installation, while utility self-start and battery cold-start functions further improve power supply reliability.

Industrial-grade reliability

Comprehensive hardware and software protection, self-diagnostics and detailed event logs ensure reliable operation.

The fan system adopts N+X redundancy, supporting 50% load operation with one fan failure and 30% load operation with two fan failures. A built-in self-aging function also supports convenient on-site commissioning.

Intelligent operation and maintenance

Equipped with a 7-inch LCD touchscreen, the system provides an intuitive HMI for easy operation.

The built-in SNMP monitoring unit supports RS485 and dry contacts, enabling intelligent remote monitoring, management and maintenance.