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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.
Dufew High Power Resistor Box combines multiple corrugated resistor elements in a compact metal enclosure to meet high-power energy dissipation requirements.
The resistor units can be connected in series or parallel according to different power and resistance requirements. The enclosure is made of aluminum-zinc coated steel plate with integrated terminals and temperature protection devices for safe and convenient installation.
With customizable specifications and multiple cooling configurations, this product is suitable for inverter braking systems, industrial testing equipment, energy storage applications, and large-scale drive systems.
| Parameter | Specification |
|---|---|
| Power Range | 1kW-30kW |
| Working Voltage | ≤1200V |
| Resistance Range | 0.01Ω-1kΩ |
| Resistance Tolerance | ±3% / ±5% / ±10% |
| Protection Grade | IP20 / IP23 |
| Temperature Coefficient | ≤300 ppm/℃ |
| Flame Retardant Grade | UL94V-2 |
| Standard | GB-5792 |
Example: CRB 10KW 13.6R J
| Code | Description |
|---|---|
| CRB | High Power Resistor Box |
| 10KW | Rated Power |
| 13.6R | Rated Resistance |
| J | Resistance Tolerance (K=10%, J=5%, H=3%) |
Selecting the right High Power Resistor Box depends on the electrical requirements, operating conditions, and installation environment. Key selection factors include:
Choose the suitable power capacity according to energy consumption requirements, load conditions, and operating cycles.
The resistance value should match the system voltage, current requirements, and application conditions to ensure stable energy dissipation.
Consider the operating duration, installation space, and heat dissipation conditions to select suitable cooling configuration.
Different applications may require different enclosure structures, protection levels, and mechanical designs.
Consider connection methods, mounting requirements, protection functions, and system integration conditions to ensure the resistor box matches the complete equipment system.
Designed for high-power industrial applications, the resistor system can be configured to meet different operating requirements, including inverter braking, energy storage discharge testing, industrial equipment aging tests, and simulated power load applications.
The internal resistor circuits can be divided into multiple independent power branches, allowing the system to adapt to different operating conditions such as low-load commissioning, rated power operation, and short-time overload testing.
This flexible configuration improves equipment adaptability, simplifies testing processes, and reduces the need for multiple resistor solutions for different applications.
The enclosure structure supports various resistor elements according to specific application requirements, including corrugated resistors, aluminum housed resistors, and tubular resistor elements.
Different configurations can be selected for clean production areas, dusty environments, oily industrial sites, and other demanding working conditions to achieve reliable performance.
The internal enclosure adopts an independent cooling chamber design, providing dedicated airflow channels for different resistor groups. This structure helps reduce heat accumulation between circuits and improves overall thermal stability during operation.
Multiple axial fans provide directional airflow across the heating elements, enhancing heat dissipation efficiency during continuous high-power operation.
The optimized ventilation design helps maintain stable temperature performance for long-duration applications, including 24-hour heavy-load testing conditions.
Each power branch is equipped with independent temperature monitoring and protection switches, allowing abnormal conditions to be detected and controlled quickly during operation.
This design provides:
- Individual fault isolation
- Reduced impact on other circuits
- Improved system availability
When one branch experiences abnormal temperature conditions, the affected circuit can be disconnected while other circuits continue operating normally.
The enclosure and internal components comply with UL94V-2 flame retardant requirements, helping improve safety performance during overload operation and long-term industrial use.
The main circuit adopts thickened integrated copper busbars to ensure reliable current transmission under high-power operating conditions.
The reinforced structure helps achieve:
- Lower voltage loss
- Reduced conductor heating
- Improved long-term current carrying capability
Compared with conventional thin terminals or copper strips, this busbar design provides better stability for continuous high-current applications.
The copper busbar system provides multiple connection positions, allowing easier integration with different tested equipment, parallel systems, and customized electrical layouts.
High Power Resistor Box is widely used in industrial applications that require reliable energy absorption, load simulation, current control, and high-power resistance solutions. Typical application areas include:
In heavy industrial fields, the resistor system is commonly applied to metallurgical production equipment, large transmission systems, and heavy-duty machinery where stable operation under high-power conditions is required.
For energy storage and electrical testing applications, it can be integrated into energy storage test platforms, battery discharge testing systems, and high-power electrical test equipment to provide controlled load conditions and reliable performance verification.
The system is suitable for port cranes, heavy lifting machinery, and hoisting systems that require effective energy dissipation and stable braking performance during frequent operation.
In industrial automation and drive applications, it can be used with large inverter drive systems, motor braking applications, and automation equipment to support reliable power control and system protection.
| Performance Item | Test Condition | Requirement |
|---|---|---|
| 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 | Cyclic operation (10S discharge, 90S interval) | >9000h |
| Damp Heat Test | 40℃±2℃ / 90%-95%RH / 100h | △R≤±(1%R+0.05Ω) |
| Temperature Cycling | -55℃, 55℃, 155℃ / 15min each, 5 cycles | △R≤±(2%R+0.05Ω) |
| Heat Resistance | 350℃/2h | No obvious discoloration or damage |
| Temperature Coefficient | Rated load vs static resistance | <300 ppm/℃ |
| Flame Retardancy | 10 times rated power for 5min | Red heating without flame |
| Performance Item | Test Condition | Requirement |
|---|---|---|
| Terminal Strength | 45N/30S | No looseness or visible damage |
| Vibration Resistance | 5-200Hz, 1g, 98m/S² | No structural damage |
| Soldering Heat Resistance | Terminal immersed at 350±5℃ for 3S | △R≤±(1%R+0.05Ω) |
| Appearance | Visual inspection | No damage, clear marking |
| Solderability | Terminal immersed at 235±5℃ for 5S | Solder coverage >95% |
| Comparison Item | High Power Resistor Box | Conventional Braking / Load Resistor Box |
|---|---|---|
| Application Range | Supports braking, discharge testing, aging tests, and simulated loads | Usually designed for single application scenarios |
| Cooling System | Independent cooling chambers with dedicated airflow channels | Common airflow structure with possible heat accumulation |
| Protection Design | Individual temperature protection for each power branch | Usually uses overall temperature protection |
| Current Carrying Structure | Reinforced copper busbar for high current operation | Standard terminals with limited current capability |
| Mechanical Structure | Reinforced enclosure suitable for heavy-duty environments | Standard sheet metal structure for lighter applications |
Dufew Electric specializes in the design and manufacturing of industrial resistor products, including High Power Resistor Box, braking resistors, and customized resistor assemblies for industrial drive systems, testing equipment, and energy applications.
Our manufacturing process covers the complete production cycle, including resistor element assembly, electrical configuration, enclosure fabrication, component integration, performance testing, and final inspection.
With professional engineering support and standardized production procedures, Dufew can provide reliable resistor solutions with:
- Customized power and resistance configurations
- Flexible enclosure and cooling designs
- Complete electrical performance testing
- Stable batch production capability
- Support for OEM projects and industrial equipment manufacturers
Every product undergoes strict quality control to ensure stable electrical performance, mechanical reliability, and long-term operating safety in demanding industrial environments.
Different industrial applications require different power levels, resistance values, and installation conditions. Dufew provides customized High Power Resistor Box solutions based on specific project requirements.
Customization options include:
- Rated power and resistance value
- Working voltage and current capacity
- Cooling configuration
- Enclosure dimensions and mounting structure
- Terminal arrangement
- Protection requirements
With professional resistor design and manufacturing capability, Dufew helps customers develop reliable solutions for industrial testing, energy discharge, braking systems, and heavy-duty equipment applications.
Dufew performs comprehensive quality inspections to verify electrical safety, mechanical strength, and long-term operating reliability.
Quality control includes:
- Raw material inspection
- Electrical performance testing
- Temperature protection testing
- Final product inspection
Dufew provides professional packaging solutions according to product size and transportation requirements.
Packaging features:
- Secure internal fixation
- Protection against impact and vibration
- Suitable for international transportation
- Support for customized and bulk orders
High Power Resistor Box is suitable for high-power inverter braking systems, industrial load testing, energy storage discharge systems, lifting equipment, wind power systems, and other applications requiring large energy consumption capability.
The temperature protection switch monitors the internal temperature and provides over-temperature protection. When abnormal heat conditions occur, it disconnects the related circuit to reduce overheating risks and improve system reliability.
Yes. Dufew supports customization of power rating, resistance value, enclosure dimensions, protection grade, resistor configuration, and connection methods.
Proper ventilation space, airflow direction, ambient temperature, and installation location should be considered to maintain effective heat dissipation during operation.
Continuous operating performance is affected by rated power, load duration, cooling efficiency, ambient temperature, and thermal management design. Proper configuration helps ensure stable operation under long-term working conditions.
High Power Resistor Box can be designed for different industrial environments. Protection level, enclosure structure, and component selection can be customized according to conditions such as dust, humidity, temperature changes, or outdoor installation.
Yes. Multiple resistor boxes can be configured for systems requiring higher power capacity. Proper electrical matching, installation spacing, and heat dissipation considerations are required to maintain safe and reliable operation.
Dufew specializes in industrial resistor design and manufacturing, providing customized resistor solutions, strict quality control, and complete performance testing for industrial equipment manufacturers, testing systems, and energy applications.
Looking for a high-power resistor solution for your industrial equipment or testing system?
Send us your application details, including power rating, resistance value, working voltage, duty cycle, cooling requirements, and installation conditions. Dufew will provide a suitable High Power Resistor Box configuration and technical support.
Request a quotation today for customized resistor solutions.
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