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Sunwin WN-6000L 6000kVA Resistive-Inductive Load Bank
Oct 03, 2026

Sunwin WN-6000L 6000kVA Resistive-Inductive Load Bank

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





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