RLB Series 50kW to 3000kW Resistive Load Banks
Customer-engineered resistive load banks designed to project specifications
Power ratings from 50 kW to 3000 kW
Resistance range 0.1Ω to 1MΩ
Tolerance options ±5% and ±10%
TCR 800 ppm/°C maximum
Scalable modular construction for utility and industrial deployment
Built to meet or exceed all relevant industry standards
ISO 9001 and IATF 16949 certified manufacturer
What are the RLB Series 50kW to 3000kW Resistive Load Banks?
The RLB is a high-power resistive load bank engineered to order by RARA Electronics, designed to simulate controlled electrical loads on generators and power sources during testing, commissioning, and maintenance operations. Unlike standard component resistors, each RLB unit is a customer-designed assembly built to the project specification, scaled from 50 kW up to 3000 kW to match the precise requirements of the target power system. This capability makes the RLB series suitable for utility-scale generator verification, large UPS acceptance testing, and industrial power system commissioning where connecting the actual facility load is impractical or unsafe.
The resistance range spans 0.1Ω to 1MΩ, with tolerance options of ±5% and ±10% and a maximum temperature coefficient of resistance (TCR) of 800 ppm/°C. The modular, scalable construction allows load step resolution to be matched to the test specification, and units are available with local, remote, wireless remote, or automatic control systems to suit the operational requirements of each site. The RLB is part of RARA’s broader high-power product family, which also includes neutral grounding resistors (NGR) for fault current limitation in medium-voltage systems and dynamic braking resistors (DBR) for energy dissipation in variable-speed drive applications.
Each RLB unit is designed and manufactured to meet or exceed all applicable industry standards, with full project documentation provided. RARA’s ISO 9001 and IATF 16949 certified manufacturing facilities supply these units to major industrial and power generation customers worldwide. Where test and commissioning specifications change between projects, the customer-designed approach ensures that each RLB is precisely matched to the generator rating, voltage class, and load step granularity required, rather than forcing a compromise with a fixed catalogue product.
RLB Series 50kW to 3000kW Resistive Load Banks Specifications
A practical overview for engineers and procurement teams evaluating resistive solutions.
Model: RLB
Resistor type: High power
Description: Load banks
Power Rating: 50KW~3000KW
Resistance (Ω): 0.1~1M
Tolerance (%): ±5, ±10
TCR (ppm/C): 800 (max.)
Applications of the WCR500 / WCR1000 Series Water Cooled High Power Film Resistors
Where RARA metal clad resistors are deployed in the field.
-Generator and UPS commissioning — acceptance testing and capacity verification of standby generators and emergency power systems before live deployment
-Data centre and critical power infrastructure — periodic load bank testing of backup generators and UPS systems to verify runtime and capacity under controlled conditions
-Renewable energy and grid-tie installations — commissioning and performance testing of wind turbine and solar inverter systems at rated output
-Utility and industrial power generation — full-load testing and verification of large diesel and gas generators at utility scale up to 3000 kW
-Marine and offshore power systems — load testing of shipboard generators and platform power systems in demanding environments
-Industrial power conditioning and maintenance — load simulation during routine maintenance, scheduled outage verification, and system fault investigation
-Military and defence power systems — acceptance and operational testing of generator sets in forward operating base and field power applications
Related Products of the RLB Series 50kW to 3000kW Resistive Load Banks
Model: RA
Resistor type: Metal clad resistor
Description: Assembly
Power Rating: 80W~750W
Resistance (Ω): 0.1~2.2k
Tolerance (%): ±0.5, ±1, ±2, ±5, ±10
TCR (ppm/C): 260 Max.
Model: HRA
Resistor type: Metal clad resistor
Description: Assembly
Power Rating: 520W-2500W
Resistance (Ω): 0.1~1.6k
Tolerance (%): ±0.5, ±1, ±2, ±5, ±10
TCR (ppm/C): 260 Max.
Model: MCS
Resistor type: High Power Braking
Description: Industrial
Power Rating:2kW-3.4kW
Resistance (Ω): 0.1~9k
Tolerance (%): ±1, ±5, ±10
TCR (ppm/C):
Model: IRVA
Resistor type: Metal clad resistor
Description: Chassis mounted assembly
Power Rating: 300W-450W
Resistance (Ω): 30~15k
Tolerance (%): ±1, ±2, ±5, ±10
TCR (ppm/C): 260 Max.
Why Choose RARA Metal Clad Resistors
What sets RARA apart for engineers and procurement managers in industrial and automotive markets.
01
Automotive Qualified
AEC-Q200 tested models and IATF 16949 certification for EV and automotive powertrain applications. Trusted by GM Korea, Tesla, and Proterra.
02
STEP Files Included
3D STEP files available for core models, supporting ECAD/MCAD integration and thermal management simulation in your design workflow.
03
Wide Power Range
A single product family spanning 10W to 8.5kW means you can source across a project from one qualified, certified supplier.
04
Global Track Record
Deployed by Siemens, Rockwell, Toshiba, Schneider Electric, LG, and Hanwha — a customer list built on decades of consistent performance.
