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- Oct 28, 2026Sunwin 3750kVA Resistive/Reactive Load Bank (WN-3750L)In the deployment and maintenance of diesel generators, gas generators, and backup power systems, no-load testing alone is far from enough to prove true reliability. To comprehensively evaluate the performance of power systems under real-world conditions, Sunwin — a professional load bank supplier and manufacturer — introduces the 3750 kVA Resistive/Reactive (RL) Load Bank (Model: WN-3750L). Specifically designed for Factory Acceptance Testing (FAT), Site Acceptance Testing (SAT), on-site commissioning, full-load testing, step-load testing, and annual maintenance, this containerised load bank is the ultimate tool for rigorous generator validation, aligned with the requirements of prevailing international testing standards such as ISO 8528 and NFPA 110.
By combining resistive and inductive loads, this load bank accurately simulates real-world operating conditions with a Power Factor (PF) of 0.8 lagging, aligning with the common requirements of most generator sets and prevailing interna - Oct 27, 2026Sunwin 3750kVA Resistive/Reactive Load Bank — Simulating Real-World Conditions to the LimitSunwin 3750kVA Resistive/Reactive Load Bank — Simulating Real-World Conditions to the Limit
In the deployment and maintenance of diesel generators, gas generators, and backup power systems, no-load testing alone is far from enough to prove true reliability. To comprehensively evaluate the performance of power systems under real-world conditions, Sunwin introduces the 3750 kVA Resistive/Reactive Load Bank (Model: WN-3750L).
Specifically designed for Factory Acceptance Testing (FAT), on-site commissioning, full-load testing, step-load testing, and annual maintenance, this containerised load bank is the ultimate tool for rigorous generator validation.
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1. Product Overview
In the deployment and maintenance of diesel generators, gas generators, and backup power systems, no-load testing alone is far from enough to prove true reliability. To comprehensively evaluate the performance of power systems under real-world conditions, Sunwin — a professional load bank supplier and manufacturer — introduces the 3750 kVA Resistive/Reactive (RL) Load Bank (Model: WN-3750L). Specifically designed for Factory Acceptance Testing (FAT), Site Acceptance Testing (SAT), on-site commissioning, full-load testing, step-load testing, and annual maintenance, this containerised load bank is the ultimate tool for rigorous generator validation, aligned with the requirements of prevailing international testing standards such as ISO 8528 and NFPA 110.
By combining resistive and inductive loads, this load bank accurately simulates real-world operating conditions with a Power Factor (PF) of 0.8 lagging, aligning with the common requirements of most generator sets and prevailing international testing standards.
2. Core Advantages: Built for High-Capacity, High-Precision Testing
2.1 Standard 0.8 Lagging Power Factor
The standard 0.8 lagging power factor (PF 0.8 lagging) matches the operating characteristics of most generator sets and prevailing international testing standards. Adjustable resistive and inductive load steps enable comprehensive performance evaluation at various load percentages (0%, 25%, 50%, 75%, 100%, etc.), realistically reproducing the operating behavior of generators under resistive-inductive loads.
2.2 Broad Voltage Compatibility and Deep Customization
The unit fully supports standard generator output voltages of 400V, 415V, 480V and 690V. Custom configurations are available based on your generator’s specific rated power, current and applicable testing protocols, guaranteeing secure and reliable loading throughout the entire test cycle. As a custom RL load bank manufacturer, Sunwin delivers tailored testing solutions for a wide range of generator sets.
2.3 Containerised Design for Harsh Environments
Built with standard ISO container carbon steel and marine-grade corrosion-resistant painting, the unit features a control chamber with an IP54 (outdoor) rating and standard ISO lifting points, ensuring easy global transportation and rapid deployment — an ideal containerised load bank for power plants, data centers and overseas projects.
2.4 Superior Cooling and Safety Protections
Vertical upwards forced air cooling with 12 powerful 4kW fans (approximately 27,000 CBM/H total airflow) supports full-load operation in extreme ambient temperatures from -20°C to +60°C. Four-layer safety protections are built in: thermal emergency cut-out, airflow switch, fan overload protection, and Emergency Stop (E-stop), ensuring stability and safety throughout high-intensity, high-precision testing.
3. Main Technical Parameters
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