Custom-engineered load banks, neutral grounding resistors, and dynamic braking resistors built to meet or exceed all industry standards — from 8kW drive braking units to 3000kW load bank installations.
Up to 3000kW
Load Bank Power Range
8kW to 60kW
DBR Power Range
Certifications:
Custom Engineered
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ISO9001
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IATF16949
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IEC
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TÜV Certified
What Are NGRs Load Banks and Braking Resistors?
A practical overview for engineers and procurement teams evaluating resistive solutions.
RARA's high power resistor range covers three distinct product categories — load banks (RLB), neutral grounding resistors (NGR), and dynamic braking resistors (DBR)
— each engineered for a specific role in industrial power system management. Unlike standard component resistors, these are
customer-designed
units built to project specifications and rated to meet or exceed all relevant industry standards.
Load banks are used to simulate an electrical load on a generator or power source during testing, commissioning, and maintenance — without connecting the actual facility load. RARA's RLB series handles up to
3000kW, making it suitable for utility-scale generator verification and data center UPS testing.
Neutral grounding resistors limit fault current in medium-voltage power systems, protecting equipment and personnel when a ground fault occurs.
Dynamic braking
resistors dissipate the kinetic energy of large motors and drives during rapid deceleration, preventing DC bus overvoltage in variable frequency drives.
Product Types
-RLB — Resistive load banks
-NGR — Neutral grounding resistors
-DBR — Dynamic braking resistors
-Custom enclosure and configuration
-Built to customer specification
Key Advantages
-Custom-engineered to your project spec
-Meets or exceeds all industry standards
-Scalable from 8kW to 3000kW
-Suitable for utility and industrial use
-ISO 9001 and IATF 16949 certified - manufacturer
RARA high power units are customer-designed to your specification — our load banks, NGRs, and DBRs are crucial for adjustment, calibration, and verification of the most demanding industrial power systems.
Where RARA high power resistors are deployed in the field.
Generator & UPS Commissioning
Load banks are essential for testing and commissioning standby generators, UPS systems, and emergency power systems before they go live. RARA's RLB series provides precisely controlled resistive loads up to 3000kW for acceptance testing and capacity verification.
Industrial Drive Braking
Large variable frequency drives (VFDs) controlling cranes, hoists, conveyors, and compressors require dynamic braking resistors to safely absorb regenerated energy during deceleration. RARA's DBR series handles 8kW to 60kW of continuous braking duty.
Medium-Voltage Fault Protection
Neutral grounding resistors limit ground fault current in medium-voltage industrial distribution systems (440V to 3.45kV), protecting transformers, switchgear, and personnel. RARA NGRs are designed to IEC and IEEE standards for reliable fault current limitation.
Marine & Offshore Power Systems
Marine vessels and offshore platforms rely on neutral grounding and load bank resistors for power system safety, generator testing, and drive system braking. RARA's robust enclosure construction withstands the vibration and humidity of marine environments.
Renewable Energy & Grid Tie
Wind turbine and solar inverter installations use dynamic braking resistors to protect power electronics during grid faults and emergency stops. Load banks are also used for commissioning and performance testing of renewable energy installations.
Data Center & Critical Power
Data centers require periodic load bank testing of backup generators and UPS systems to verify capacity and runtime. RARA's RLB load banks offer the high power ratings and precise load control needed for data center acceptance testing and annual maintenance.
Select models from our metal clad lineup. Download individual datasheets for full specifications, dimensions, and ordering codes.
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.)
Model: NGR
Resistor type: High Power
Description: Neutral Grounding
Power Rating: 440/√3V, 3.3/√3kV, 3.45/√3kV
Tolerance (%): ±10
TCR (ppm/C): 800 (max.)
Model: DBR
Resistor type: High Power
Description: Dynamic Braking
Power Rating: 8KW~60KW
Resistance (Ω): 1~150
Tolerance (%): ±5, ±10
TCR (ppm/C): 800 (max.)
Why Choose RARA High Power Resistors
What sets RARA apart for engineers and procurement managers in industrial and automotive markets.
01
Custom Engineered
Every high power unit is designed to your application requirements — voltage, current, duty cycle, enclosure rating, and installation environment are all taken into account.
02
Massive Power Range
From 8kW dynamic braking units to 3000kW load banks — RARA covers the full spectrum of high power resistive applications from a single ISO-certified source.
03
Industry Standards
All units meet or exceed relevant IEC and IEEE standards for neutral grounding, dynamic braking, and load bank applications in industrial and utility power systems.
04
Global Track Record
Trusted by Siemens, Rockwell, Schneider Electric, HD Hyundai Infracore, and Hanwha — deployed in industrial facilities across six continents.
