Sunwin 500KW three-phase Resistive Load Bank

Sunwin WN-500 is a 400V three-phase resistive load bank engineered for high-power load testing. Rated at 500kW with unity power factor (PF=1.0), it features 1kW minimum load resolution to authentically simulate real operating conditions of generators, UPS, BESS and data center power supplies, delivering accurate, authoritative test data. Integrated cabinet with heavy-duty castors enables flexible indoor & outdoor deployment. Equipped with Siemens PLC & HMI touchscreen intelligent control system, supporting local touch operation and PC remote control. Comprehensive multi-layer safety protections cover cooling, electrical circuit and over-temperature. It stably runs under heavy-duty conditions including full-load continuous operation and intermittent impact load, with customizable structure and power ratings available on demand.

Core Advantages

1. Precision Step Load Control for Reliable Test Data 1kW minimum load step, ±3% load element tolerance, ±5% short-term voltage tolerance, unity PF=1.0 resistive design without reactive power interference, truly reflecting active power output of power equipment.
2. Industrial High-Temp Resistive Elements for Long-Term Stability Finned stainless steel tubular resistors with Ni-chrome core withstand up to 1200℃, minimal resistance drift, excellent anti-aging & impact resistance, greatly cutting maintenance cost.
3. High-Volume Horizontal Airflow Cooling System Single large axial blower delivers 70m³/kW/h airflow with horizontal side exhaust, paired with 304 stainless steel louvers. Dual monitoring of fan overload & low airflow prevents overheating derating.
4. Siemens Intelligent Dual Control with Full Visualized Monitoring Siemens HMI touchscreen displays real-time 3-phase V/A/kW/Hz/Pf; Modbus TCP communication supports remote PC automatic loading & data export, with segmented loading & overload simulation functions.
5. Full-Range Multi-Layer Safety Protection Fan overload/low airflow protection, thermal emergency cut-out, MCCB, local-remote interlock, E-stop, branch fuse protection. IP54 whole enclosure & IP55 control chamber allow stable outdoor operation.

6. Movable Integrated Cabinet for On-Site Testing Compact container structure 115512051120mm with 4 heavy-duty castors for easy transport. Standard 400A IEC quick connectors & copper busbars, compatible with 360V/380V/400V via power derate design.

Application Fields

• Full-load factory test, on-site acceptance & regular maintenance of generator sets

• UPS switching performance, backup duration & peak load simulation test

• BESS energy storage capacity & charge-discharge stability inspection

• Data center backup power load simulation & power redundancy verification

• Power grid balancing commissioning & power equipment aging test