MR Series Medium Voltage Load Banks
MR Series Medium Voltage Load Banks
Direct-connect load banks for medium voltage systems — six standard configurations across 13.8 kV (10, 16, 20 MW) and 35 kV (9, 14.4, 18 MW). Trailer-mounted or containerized, air-cooled, and engineered for continuous duty in the most demanding environments.
Engineered for what most load banks can’t handle
The MR Series eliminates the step-down transformer and parallel-bank complexity that limit traditional load bank deployments. Connect directly to 13.8 kV or 35 kV systems with a single rugged unit.
Six standard configurations across two voltage lines
The MR Series covers three headline power ratings on each of two standard voltage lines — 13.8 kV and 35 kV — so you can specify the exact configuration for your commissioning, prime-power, or continuous-duty application.
All MR Series models are direct-connect, air-cooled, and available in trailer-mounted or stationary / containerized configurations. Additional voltage-power combinations and finer power resolution are available as engineered-to-order builds — please contact sales for specifications.
How the MR Series compares
Side-by-side against the typical 5 MW trailer-mounted load bank competitors deploy at the same testing capacity.
* Comparison vs. competitors’ largest single-install load bank and typical 5 MW trailer-mounted unit at equivalent capacity. Stats from ULB manufacturer documentation.
Platform Spec Summary
Key parameters shared across the MR Series. Model-specific parameters (weight, dimensions, exact step resolution) vary by configuration — full spec sheet per model available on request.
Additional voltage-power combinations and finer power resolution are available as engineered-to-order builds — please contact sales for specifications.
Where the MR Series delivers
Generator & Gas Turbine Commissioning
Up to ~3× more power per unit reduces the need for multiple smaller load banks, simplifying large-scale commissioning.
Data Center Prime Power Testing
Hyperscale-ready with ~60% less footprint, validating high-density power systems in space-constrained environments.
Utility & Substation Load Testing
Direct medium voltage connection reduces cabling by ~50%, improving setup efficiency and minimizing losses.
Microgrid & Hybrid System Validation
Rapid deployment with ~4× easier installation, well-suited for complex hybrid and distributed energy systems.
Industrial Power System Testing
Reliable high-load testing capability with reduced infrastructure requirements, improving overall site efficiency.
AI Load Emulation & Absorption
Simulates rapid AI load spikes and enables permanent load absorption for grid stability and generator optimization.
Trusted by Industry Leaders
Engineered, built, and supported at ULB’s Wixom, Michigan facility — ULB equipment powers real-world testing programs from data centers to substations, supplied to leading rental partners and commissioning specialists across the continent.
ULB manufacturing and service facility · 52119 Grand River Avenue, Wixom, MI · ISO 9001:2015 certified.
Take the details with you
The full MR Series brochure and per-model spec sheets are being finalized. Request a copy directly from our sales team and we’ll send them over.
Product Brochure
MR Series overview — all six model configurations, key capabilities, applications, and options.
Model-Specific Spec Sheets
Detailed specifications for individual MR Series models, including dimensions, weights, and controls.
Questions about the MR Series
Common questions from engineers, specifiers, and procurement teams.
What voltage levels and power ratings does the MR Series support?
The MR Series offers six standard configurations across two voltage lines: 10, 16, and 20 MW at 13.8 kV, and 9, 14.4, and 18 MW at 35 kV — all direct medium voltage connection. Additional voltage-power combinations and finer power resolution are available as engineered-to-order builds. Please contact sales to discuss your specification.
Is the MR Series designed for continuous duty?
Yes. All MR Series models are rated for continuous duty up to their maximum power level, built on a rugged air-cooled vertical airflow design engineered for demanding outdoor and harsh-environment deployments.
What does the “CR” suffix in model names (e.g., MR20V-13.8K-CR) mean?
CR indicates the “Container Ready” designation — the platform is engineered for both trailer-mounted mobile deployment and stationary / permanent containerized installations.
What applications is the MR Series suited for?
Generator and gas turbine commissioning, data center prime power testing (including hyperscale AI environments), utility and substation load testing, microgrid and hybrid system validation, industrial power system testing, and AI load emulation / absorption.
What certifications does the MR Series carry?
UL / ETL listed. Manufactured in an ISO 9001:2015 certified facility.
Talk to a ULB Specialist
Get a tailored configuration recommendation, technical briefing, or quote for the MR Series. Our specialists respond within one business day.
Get in touch
Choose what works best — our existing contact form, a direct call, or a brochure request to share with your team.
- Technical Details
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Technical Details
Load Bank
AC Resistive
Load Bank Type
Resistive
Load Rating
Up to 20 MW continuous duty · 1.3 MW step resolution (custom finer optional)
Power Factor
1.0
Install Type
Trailer Mounted, Stationary / Permanent
Duty Cycle
Continuous Duty
Cooling System
Air Cooled, Vertical Airflow