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We offer a comprehensive portfolio including resistors, braking units, reactors, power filters, and transformers, with full customization options to meet diverse application requirements.
When power equipment requires performance verification before installation or mass production, a stable and controllable load source is essential.
Dufew Electric Load Resistor Cabinet provides a practical solution by simulating real operating loads through dry resistor elements. It converts electrical energy into heat through resistor modules, allowing engineers to evaluate equipment output capability, overload performance, temperature rise, and long-term operating stability.
Unlike braking resistor systems that mainly handle regenerated energy during motor deceleration, this product is developed for continuous load simulation and reliability testing.
The cabinet adopts multiple independent resistor groups with modular switching design. Users can adjust different load combinations according to testing requirements, including light load, rated load, and overload conditions.
The system supports:
- Power range: 20KW-500KW
- Working voltage: ≤3000V
- Resistance range: 0.01Ω-1KΩ
- Resistance accuracy: ±3% / ±5% / ±10%
Dufew Electric provides customized configurations according to tested equipment parameters, testing duration, installation environment, and load requirements.
Before generators, UPS systems, energy storage systems, or power converters are installed or delivered for mass production, manufacturers need to verify whether the equipment can operate safely and reliably under different load conditions.
No-load testing alone cannot reveal issues such as insufficient output capability, excessive temperature rise, unstable power conversion, protection system failures, or long-term reliability risks.
A controlled resistive load allows engineers to simulate real operating conditions in a safe testing environment. Dufew Electric Load Resistor Cabinet helps users evaluate equipment performance through low-load testing, rated-load testing, continuous full-load testing, and short-time overload testing, helping identify potential problems before deployment.
It uses high-power resistor elements to convert electrical energy into controlled thermal energy during equipment testing.
During the testing process, the tested equipment supplies electrical power to the cabinet, and resistor modules consume energy according to configured resistance values. The generated heat is then removed through the cooling system, allowing engineers to analyze equipment performance under different load conditions.
The modular resistor structure enables flexible load combinations without replacing fixed-power testing equipment, supporting various testing conditions such as low-load operation, rated-load operation, continuous full-load operation, and short-time overload simulation.
Selecting a suitable load cabinet requires more than choosing a power rating. The correct configuration depends on the tested equipment, operating conditions, and specific testing objectives.
The load capacity should match the power output requirements of the tested equipment, including generator rated output, UPS capacity, PCS power rating, and inverter output power.
For example, a 500KW generator testing project may require a load cabinet configured according to the actual testing percentage, duration, and operating conditions.
Different equipment requires different electrical configurations. Customers should provide AC or DC testing requirements, working voltage, and frequency requirements where applicable.
Dufew Electric can customize the cabinet according to different voltage conditions and testing requirements.
Different testing purposes require different load profiles. Key factors include required load steps, continuous operation time, overload requirements, and aging test duration.
A cabinet designed for short-time verification may require a different configuration from one used for long-duration reliability testing.
The installation environment directly affects cabinet structure and cooling design. Important factors include indoor or outdoor installation, available space, ventilation conditions, and transportation requirements.
Dufew Electric evaluates these factors before recommending a suitable structure and configuration.
Different testing projects require different load levels. Dufew Electric designs the cabinet with multiple independent resistor branches, allowing flexible load combinations according to testing requirements.
This design allows multiple power sections to be switched independently, creates different load levels without replacing equipment, and improves testing efficiency and repeatability.
For example, one cabinet can simulate several testing stages instead of requiring multiple fixed-power load devices.
Modern power equipment includes various output types, such as AC generators, DC systems, battery storage PCS, and power converters. The cabinet can be configured according to different electrical testing requirements.
It supports different voltage levels and AC/DC load testing applications, reducing the need for separate testing equipment.
Typical applications include energy storage system testing, UPS performance verification, power converter testing, and generator load testing.
A reliable load testing system requires more than accurate resistance values. The cabinet structure must also provide stable electrical performance, effective heat dissipation, safe operation, and convenient maintenance.
Dufew Electric Load Resistor Cabinet integrates resistor modules, cooling systems, protection components, and cabinet assembly to provide a complete resistive load testing solution.
| Component | Function |
|---|---|
| High-Power Resistor Modules | Convert electrical energy into controlled heat during testing |
| Independent Load Groups | Provide flexible load adjustment for different test conditions |
| Cooling System | Remove generated heat and maintain stable operation |
| Protection Components | Improve operating safety during abnormal conditions |
| Electrical Connection System | Ensure reliable connection between tested equipment and load cabinet |
| Cabinet Enclosure | Provides mechanical protection and organized internal installation |
The modular structure allows Dufew Electric to customize the cabinet according to:
- Required power capacity
- Resistance value
- Working voltage
- Testing duration
- Installation requirements
Long-duration testing requires stable resistance performance and effective heat control. Dufew Electric Load Resistor Cabinet adopts a separated thermal management design to improve operating stability during continuous testing.
The design includes:
- Independent airflow channels for different load groups
- Individual temperature monitoring
- Independent protection for each load section
This helps reduce heat interaction between resistor groups, improve test consistency, and maintain stable resistance values during long-term operation.
The cabinet adopts a modular structure designed for convenient inspection, maintenance, and future adjustment.
Key features include:
- Modular resistor arrangement
- Independent electrical branches
- Clear internal wiring layout
- Accessible maintenance panels
When a load section requires inspection, technicians can service the specific module without completely disassembling the entire cabinet, helping reduce maintenance time and equipment downtime.
| Parameter | Specification |
|---|---|
| Product Type | Load Resistor Cabinet |
| Application | Power Equipment Testing & Aging Test |
| Power Range | 20KW-500KW |
| Working Voltage | ≤3000V |
| Resistance Range | 0.01Ω-1KΩ |
| Resistance Accuracy | ±3% / ±5% / ±10% |
| Protection Grade | IP20/IP23 |
| Temperature Coefficient | ≤300 ppm/℃ |
| Flame Retardant Grade | UL94V-2 |
| Standard | GB-5792 |
Example: CRC 100KW 2.7R J
| Symbol | Description |
|---|---|
| CRC | Load Resistor Cabinet |
| 100KW | Rated Power |
| 2.7R | Rated Resistance |
| J | Resistance Accuracy (K=±10%, J=±5%, H=±3%) |
To ensure stable operation during long-duration testing, Dufew Electric performs electrical verification before delivery.
| Test Item | Test Condition | Performance |
|---|---|---|
| Dielectric Strength | 2500VAC/50Hz/60S | Leakage current ≤10mA |
| Insulation Resistance | 1000VDC | ≥100MΩ |
| Short-Time Overload | 10 times rated power 5S | No visible damage |
| Long-Term Load Life | Cycle operation (10S discharge, 90S interval) | >9000h |
| Damp Heat Test | 40℃±2 / 90%-95%RH /100h | △R≤±(1%R+0.05Ω) |
| Temperature Cycle | -55℃, 55℃, 155℃ cycle test | △R≤±(2%R+0.05Ω) |
| Heat Resistance | 350℃/2h | No obvious damage |
| Temperature Coefficient | Rated load comparison | ≤300 ppm/℃ |
To ensure reliable operation during transportation and industrial installation environments, Dufew Electric performs mechanical verification on the Load Resistor Cabinet before delivery.
| Test Item | Condition | Performance |
|---|---|---|
| Terminal Strength | 45N/30S | No looseness or damage |
| Vibration Resistance | 5-200Hz, 1g, 98m/S² | No structural damage |
These mechanical verification procedures help ensure structural reliability and stable electrical connections during transportation, installation, and long-term operation.
Dufew Electric Load Resistor Cabinet is widely used for performance verification, reliability testing, and aging tests of power equipment. It provides controlled electrical load simulation to help engineers evaluate equipment performance under different operating conditions.
| Application | Customer Testing Requirements | How Load Resistor Cabinet Helps | Key Evaluation Items |
|---|---|---|---|
| Generator Load Testing | Verify whether generators can maintain stable output under rated and continuous load conditions | Simulates different load conditions to evaluate generator performance before delivery or installation | Rated output capability, thermal performance, continuous operation stability, protection response |
| UPS System Testing | Verify backup power reliability and battery discharge performance | Provides controlled resistive loads for UPS output testing and reliability verification | Output stability, discharge performance, overload capability, long-term operation |
| Energy Storage PCS Testing | Evaluate power conversion performance under different operating conditions | Simulates AC/DC loads for PCS performance testing and thermal evaluation | Power conversion efficiency, thermal behavior, output stability, continuous operation capability |
| Inverter & Power Supply Testing | Verify product performance during development and production testing | Creates repeatable load conditions for testing power electronic equipment | Output performance, temperature rise, protection functions, reliability evaluation |
| Industrial Power Equipment Aging Test | Perform long-duration operation verification before mass production | Provides stable resistive loading for endurance and aging tests | Long-term stability, component reliability, thermal management performance |
Selecting a suitable load cabinet requires more than matching power ratings.
Dufew Electric evaluates:
- Tested equipment rated power
- Voltage requirements
- AC or DC testing mode
- Required load steps
- Continuous operating time
- Installation conditions
Based on these parameters, Dufew Electric can provide suitable resistor configuration, cooling design, and cabinet structure.
This helps customers avoid problems such as insufficient testing capacity, excessive temperature rise, or unsuitable load configuration.
Dufew Electric is a professional power electronics component manufacturer in China, integrating resistor manufacturing, cabinet assembly, and electrical testing capabilities to provide customized load testing solutions for different industrial applications.
Unlike suppliers that only assemble standard cabinets, Dufew Electric manages key production processes from resistor configuration and cabinet integration to final inspection, helping improve product consistency, quality control, and project reliability.
Resistor modules are configured according to customer testing requirements, including power capacity, resistance value, voltage conditions, and operating duration. This ensures the load cabinet can provide stable electrical loading during different testing scenarios.
The cabinet assembly process includes internal electrical wiring, protection component installation, cooling structure integration, resistor module installation, and external cabinet assembly.
The internal layout is optimized for electrical reliability, efficient heat dissipation, and convenient maintenance to support long-term industrial operation.
Before delivery, Dufew Electric performs comprehensive inspection procedures, including electrical connection verification, resistance measurement, insulation testing, dielectric strength testing, mechanical inspection, and product specification confirmation.
These inspection procedures help ensure each load testing system meets the agreed project requirements before shipment.
Different industries require different testing conditions. Dufew Electric supports customized solutions with 20KW-500KW power configurations, customized resistance values, different voltage requirements, AC/DC testing options, and cabinet structure adjustments.
Dufew Electric manages key processes from resistor components to finished cabinet systems, helping improve product consistency, quality control, delivery reliability, and technical communication efficiency.
For industrial testing projects, correct selection is essential. Dufew Electric works with customers to evaluate application requirements, electrical parameters, testing procedures, and installation conditions to recommend suitable solutions instead of fixed standard configurations.
Dufew Electric follows structured quality control procedures to maintain stable manufacturing standards and reliable product performance throughout the production process.
Quality assurance includes ISO9001 Quality Management System Certification, CE Certification, electrical performance testing records, and factory inspection records.
Through controlled manufacturing processes and product verification procedures, Dufew Electric provides reliable load testing solutions for industrial power applications.
As industrial testing equipment, load testing systems require reliable transportation preparation and installation planning to ensure safe delivery and smooth commissioning.
Dufew Electric provides reinforced export packaging, moisture protection, internal fixing structures, and product identification labels to improve transportation safety.
Before shipment, engineers confirm cabinet dimensions, lifting requirements, electrical interface information, and customer installation conditions to support efficient installation after delivery.
Transportation options include sea freight for international projects, truck transportation for domestic delivery, and other customized logistics solutions according to project requirements.
Although both Load Resistor Cabinet and Resistive Load Bank are used for electrical load simulation, they are designed for different testing requirements and application environments.
| Comparison Item | Load Resistor Cabinet | Resistive Load Bank |
|---|---|---|
| Main Purpose | Customized power equipment testing and reliability verification | General electrical load simulation |
| Typical Applications | Generator testing, UPS testing, energy storage PCS testing, inverter testing | Generator commissioning, field testing, temporary load testing |
| Design Focus | Customized resistor configuration, cabinet integration, long-term testing stability | Standardized load capacity and portable testing requirements |
| Load Configuration | Flexible resistor groups with customized load steps | Usually fixed load steps according to standard models |
| Installation | Usually installed as part of a permanent testing system | Often designed for temporary or mobile testing |
| Customization | High customization for voltage, resistance, power, and structure | Limited customization depending on standard configuration |
| Suitable Users | Equipment manufacturers, R&D laboratories, system integrators | Service companies, commissioning teams, maintenance providers |
A Load Resistor Cabinet is suitable for applications requiring long-term and repeatable testing, especially when customized load conditions and specific electrical configurations are needed.
It is commonly used for:
- Long-term reliability testing
- Customized load profiles
- Integration with production or laboratory test systems
- Specific voltage and resistance configurations
A Resistive Load Bank is generally more suitable for temporary testing applications where portable and standardized load simulation is required, such as:
- Field performance testing
- Standardized load simulation
- Portable testing requirements
Dufew Electric focuses on customized solutions for manufacturers and system integrators who need stable, repeatable, and controllable testing environments for industrial power equipment.
Selection depends on the tested equipment power, voltage, testing duration, required load steps, and installation environment.
Yes. Multiple independent resistor groups allow users to combine different power levels for different testing conditions.
It is commonly used for generators, UPS systems, energy storage PCS, inverters, and power supply equipment.
Yes. The cabinet is designed with independent cooling and temperature control structures for long-duration operation.
Yes. Power rating, resistance value, cabinet dimensions, cooling method, and electrical configuration can be customized.
Customers normally need to provide equipment power, voltage, testing requirements, load profile, and installation conditions.
Through controlled manufacturing processes, electrical inspection, and performance verification before shipment.
Yes. Product specifications, test records, and related technical documents can be provided according to project requirements.
Every power testing project has different requirements.
Dufew Electric provides customized Load Resistor Cabinet and resistive load bank solutions based on:
- Power rating
- Voltage level
- Testing purpose
- Load profile
- Installation environment
Contact Dufew Electric to discuss your project requirements and receive a suitable technical proposal.
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No. 364, Kangyang Road, Huangdai Town, Xiangcheng District, Suzhou City, Jiangsu Province, China
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