Sunwin WN-240L 240kW AC Liquid-Cooled Resistive Load Bank

1. Product Overview

The Sunwin WN-240L is a 240kW high-power AC programmable liquid-cooled load bank designed for performance testing, burn-in testing and maintenance of power sources such as generator sets, UPS systems, solar inverters, energy storage systems and industrial electrical equipment. Its core advantage lies in an advanced closed-loop liquid cooling system, delivering 240kW of continuous load capacity with exceptional stability and low noise.

Equipped with intelligent sensors and dual control interfaces (local HMI touch screen + remote PC control), and supporting three-phase 380/400/415/480/690Vac wide voltage levels, the WN-240L ensures precise, reliable and safe testing in demanding industrial environments, especially in indoor or space-constrained test scenarios.

2. Why Liquid-Cooled Load Testing

As AI computing infrastructure and new energy grow rapidly, rack power density in data centers keeps rising, traditional air cooling is approaching its limits, and liquid cooling has become a key technology path for high-density data centers. At the same time, data center UPS, backup generators, energy storage inverters and other power equipment must be verified through full-load testing (load bank testing) to ensure reliable power delivery in critical moments.

Compared with conventional air-cooled load banks, a liquid cooled load bank discharges far less hot air into the test environment, operates at lower noise and occupies less space, while transferring heat directly through the cooling water loop — making it ideal for indoor testing, equipment room commissioning, data center commissioning and space-constrained deployments. The WN-240L is engineered for exactly this need.

3. Key Technology Highlights

3.1 Closed-Loop Liquid Cooling System

The WN-240L adopts an advanced closed-loop liquid cooling system that efficiently removes load-generated heat through the cooling circulation, enabling stable operation at 240kW continuous load capacity while maintaining extremely low noise levels — delivering a quiet, clean testing experience for indoor and sensitive environments.

3.2 Wide Voltage Level Compatibility

The unit supports three-phase 380/400/415/480/690Vac multiple voltage levels, with both test power connection and control circuit adopting quick-connect / power-lock connections. One system covers multiple grid standards and different national supply voltages, flexibly adapting to global project requirements.

3.3 Portable, Space-Saving Design

With a compact footprint of only 600×890×1755mm and a weight of about 750kg, the vertical, mobile design allows flexible deployment in indoor equipment rooms, laboratories and space-constrained test sites, combining high-power testing capability with on-site mobility.

3.4 Intelligent Monitoring and Dual Control Interfaces

The unit is equipped with intelligent sensors for liquid flow volume, liquid pressure and inlet/outlet temperature, monitoring the liquid cooling system in real time. It supports dual control interfaces — a local touch screen and remote PC control — for intuitive operation and integration into host systems for remote monitoring and data management, meeting automated testing and centralized management needs.

4. Main Technical Specifications

5. Typical Applications

For data centers, the WN-240L verifies the load capacity of UPS, backup generators and power distribution systems and supports equipment room commissioning. For the new energy sector, it supports performance testing and burn-in testing of energy storage inverters and solar inverters, verifying load capacity and grid-connection reliability.

For generation equipment and industrial testing, it supports generator set performance testing, UPS system maintenance testing and load verification of industrial electrical equipment. For indoor and space-constrained environments, the low-heat-dissipation, low-noise liquid cooling design is especially suitable for laboratories, equipment rooms and offices where space is limited and sensitivity to heat and noise is high.