WN-6000L 6000kVA Resistive-Inductive Load Bank
1. Product Overview
The WN-6000L is a 6000kVA high-power resistive-inductive (R/L) load bank developed by Qingdao Sunwin Technologies Co., Ltd. (Sunwin). Designed for generator load bank testing, UPS load bank testing, data center load testing and power-system tests, it delivers controlled active and lagging reactive loading to fully meet high-power equipment load-verification requirements.
Built on the core principle of "resistive-inductive integration", the WN-6000L combines 4800kW active load with 3600kVar inductive reactive load at 0.8 lagging power factor, accurately reproducing the real operating conditions of generator sets and UPS systems. It helps customers fully verify load capacity and reliability during factory acceptance, grid-connection testing and routine maintenance.
2. Why High-Power Resistive-Inductive Load Testing
Load bank testing is the industry-standard method for verifying the true performance of power equipment. Diesel generators operating under light load for extended periods suffer from wet stacking, leading to higher fuel consumption, reduced output and even turbocharger faults. Full-load testing with a load bank raises engine temperature, burns off carbon deposits and restores performance.
In terms of compliance, emergency power supply systems are required to be tested under load (e.g., NFPA 110 requirements for loaded testing of emergency power systems), and data center Tier certification demands full-load verification of UPS, diesel generators and distribution systems. A resistive-inductive load bank verifies rated kVA, rated power factor and rated current simultaneously at 0.8 lagging power factor, reproducing real operating conditions far more accurately than resistive-only loads. It is the essential testing equipment for generator acceptance, UPS commissioning and data center power system certification.
3. Key Specifications
Table 1 WN-6000L Key Electrical & Structural Specifications
Parameter | Specification |
Rated Apparent Power | 6000 kVA |
Rated Active Power | 4800 kW |
Inductive Reactive Power | 3600 kVar |
Power Factor | 0.8 (lagging) |
Rated Load Voltage / Frequency | 415 Vac / 50 Hz |
Phase & Wires | 3P4W + PE |
Active Stage Schedule (Route A/B) | 2400 kW each, independently switched |
Inductive Stage Schedule (Route A/B) | 1800 kVar each, independently switched |
Rated Line Current | 4174 A per route; 8347 A total |
Main Circuit / Input | Route A + Route B, independent busbars (3000 kVA each) |
Auxiliary Power Supply | 415 Vac 50 Hz, 3P+N+PE |
Protection Concept | Hardwired fail-safe chain + PLC/HMI monitoring |
Critical Protections | Fan overload, low airflow, chamber temperature, E-Stop |
Load Enable | Independent KSRA / KSRB hardwired load-enable relays |
PLC | Siemens S7-200 SMART PLC |
Local / Remote Control | HMI + PC software |
Communication | RJ45 Ethernet, Modbus TCP |
Metering | V / A / kW / kVar / kVA / Hz / PF |
Cooling | Forced-air cooling |
Overall Size | 7000×2438×2900 mm (L×W×container body net height, excluding opened top covers) |
4. Key Features
Table 2 WN-6000L Key Advantages
Feature | Value |
High-Power Resistive-Inductive Integration | 6000 kVA apparent power with combined active and inductive reactive loading at 0.8 lagging PF, precisely simulating real load characteristics of high-power systems |
Dual Independent A/B Routes | 2×3000 kVA independent load routes with independent copper-busbar input and stage switching, enabling zone testing and flexible combination |
Hardwired Fail-Safe Protection | Fan overload, low airflow, chamber temperature, E-Stop and more; safety does not depend on network communication |
Intelligent Control & Remote O&M | Siemens S7-200 SMART PLC + local HMI + PC software, with Modbus TCP remote monitoring and operation |
Full-Parameter Real-Time Metering | Voltage, current, active power, reactive power, apparent power, frequency and PF fully monitored with traceable test data |
Industrial-Grade Reliability | Finned Ni-Cr heating elements, three-phase reactors, industrial blowers and high-current copper busbars for long-term continuous operation |
5. Typical Applications
The WN-6000L is widely applied in power load testing across generators, data centers and renewable energy storage:
Application | Description |
Genset Load Testing | Factory loaded verification, on-site acceptance and routine maintenance; prevents wet stacking |
UPS Load Testing | Load capacity, switchover time and redundancy verification |
Grid Balancing | Controlled loading for grid regulation and surplus power absorption |
Data Center Load Testing | Full-load testing of distribution systems and backup power |
BESS Testing | Charge/discharge condition verification of energy storage converters and systems |