Transformer Testing

Every project comes with pressure, such as tight schedules, high stakes, and no room for error. We’re here to keep things running the way they should. We provide field service solutions from 300kVA to 345kV, and work with every manufacturer's equipment.

Certified Transformer Testing Services You Can Trust

Testing Solutions for Your Power Equipment Needs

Your power systems need to run smoothly, safely, and without surprises, and we know that they're the backbone of your operation. Our transformer testing services are designed to help you avoid failures, meet compliance standards, and keep your team protected.

Whether you’re managing an industrial plant, commercial build, or a utility site, our testing team works with you to uncover risks, verify performance, and give you the peace of mind to keep moving forward, on time, and without compromise.

JCL's technician performing transformer testing inside the facility using diagnostic tools.

Types of Testing We Provide at JCL

Power distribution you can trust starts with testing you can rely on.

At JCL Energy, we know that every equipment you manage, whether it’s a padmount transformer, dry type transformer, or substation transformer, carries the weight of uptime, safety, and execution. Our power distribution equipment and transformer testing services are built to help you avoid costly downtime, catch issues before they grow, and assure your systems meet the highest standards so you can stay focused on the job ahead.

Transformer Services Cards

Transformer Electrical Testing

Electrical failures don’t wait for the right time; they happen fast and disrupt everything. That’s why JCL’s transformer testing detects hidden issues, verifies performance, and helps you stay ahead of outages.

• Voltage ratio & vector group verification
• Winding & insulation resistance testing
• Magnetizing current & balance checks
• Partial discharge, SFRA, Tan Delta
• Sweep Frequency & DIRANA analysis

Transformer Oil Testing

Oil testing is a window into transformer health. We analyze samples to spot early warning signs of insulation breakdown, contamination, or moisture issues.

• Dissolved Gas Analysis (DGA)
• Interfacial Tension & particle count
• Breakdown Voltage & moisture (PPM)
• Furan analysis for insulation
• Oil resistivity & Tan Delta

Transformer Breakers Testing

A breaker’s failure can shut down an entire system. Our breaker testing ensures protective equipment responds exactly when needed.

• Contact & insulation resistance
• Mechanical operation & withstand tests
• Timing tests for open/close response
• Integrity for low, medium & high-voltage
• Complete safety assessment

Transformer Relay Testing

Relays are your first responders. We make sure they react quickly, accurately, and in perfect sync with your system.

• Function testing (differential, overcurrent, etc.)
• Timing & coordination with breakers
• CT/PT accuracy verification
• Relay insulation testing
• Fault detection accuracy

Ways We Help You Through Our Transformer Testing

We’re more than a transformer company; we’re your proactive partner when downtime isn’t an option. From sudden outages to system failures, we help prevent issues before they escalate, so you can move forward with confidence.

  • 1

    Validate real-world performance

    We help you confirm your transformer is working as expected under real load, in real conditions, not just in theory.

  • 2

    Spot issues before they escalate

    Our transformer testing is designed to catch potential failures early, so you can prevent disruptions and stay ahead of the curve.

  • 3

    Support a safer work environment

    By checking critical components, we help you protect your team and equipment from avoidable safety risks.

  • 4

    See where your transformer fits in

    We help you better understand how your transformer interacts with your full power system, so you’re never left guessing.

  • 5

    Uncover risks before they become problems

    From insulation breakdown to winding faults, we check for signs of stress that could cause costly issues down the line.

  • 6

    Protect your investment over time

    Preventive testing helps you stay compliant, avoid major repairs, and get the most out of your transformer’s lifespan.

Know When to Schedule Your Testing

The right time to test is before small issues become big problems.

Whether you're installing new equipment, troubleshooting a fault, or working with a reconditioned transformer or custom transformer, timely testing helps you protect your investment, stay compliant, and avoid unplanned downtime. At JCL, we’re here to guide you through every step, so you’re never left guessing.

  • Upon commissioning new equipment
    Confirm your transformer is installed correctly and performing as expected from day one.
  • After experiencing faults or outages
    Get to the root of the problem quickly and prevent future disruptions.
  • As part of a routine maintenance schedule
    Catch early signs of wear and avoid unexpected failure with proactive diagnostics.
  • When purchasing used transformers
    Assure that what you’re buying is safe, functional, and ready to perform.

Industries That Trust JCL for
Transformer Testing

When reliability matters most, industry leaders rely on JCL for precise, proficient transformer testing. From utilities to high-tech operations, we help you detect issues early, validate performance, and keep your power distribution systems running safely and efficiently, no matter the demand.

You focus on scaling your operation, and we’ll make sure your transformers are ready to support it.

Responsive Transformer Testing for High-Stakes Projects

At JCL Energy, we understand that those responsible for power distribution need more than just a vendor; they need a partner. As an electrical transformer supplier, we’re here to support you whether you’re integrating new equipment, resolving faults quickly, or staying ahead with preventative measures including:

  • Fast, accurate testing by certified professionals
  • Reduced downtime and minimized the risk of equipment failure
  • Detailed reporting with clear, actionable recommendations
  • Full support for IEEE/ANSI compliance requirements
  • Flexible on-site or off-site testing based on your needs

Among leading distribution transformer suppliers, we stand out for fast and responsive testing services. We are here to help you reduce downtime, deliver clear guidance, and support your operations across the US, Canada, and Mexico. Contact us to get the conversation started!

Or contact a Transformer Specialist at 866-983-1300. We offer quick quote returns, fair pricing and speedy lead-times!