Unplanned outages and equipment failures carry enormous operational and financial consequences. From aging transformer fleets to increased load demands and evolving grid requirements, when it comes to high-voltage equipment diagnostics, TJ|H2B stands above the competition.
As the largest independent analytical laboratory and consulting group specializing in high-voltage equipment diagnostics, TJ|H2b has spent more than 25 years helping utilities, industrial power suppliers, and service companies turn raw test data into actionable insight.
Our mission was born from a pivotal tragedy in 1972, when a transformer failure caused multiple fatalities and exposed major gaps in utility safety and testing standards. Since then, we’ve dedicated ourselves to advancing diagnostic techniques—including pioneering the wide-scale adoption of Dissolved Gas Analysis (DGA)—to prevent failures and strengthen grid reliability.
Below, we break down what truly sets TJ|H2b apart in high-voltage diagnostics (five distinct benefits):
1. Decades of Proven Expertise & Accredited Laboratory Standards
When it comes to high-voltage equipment diagnostics, accuracy is non-negotiable. That’s why our laboratories maintain stringent accreditations, including:
- ISO/IEC 17025 accreditation, ensuring industry-leading quality, calibration, and testing precision
- ISO 9001 certification for consistent processes, quality management, and continuous improvement
- Highly trained chemists, engineers, and diagnostic experts with decades of combined experience
But what truly sets us apart is our history.
Our organization began as Analytical Associates, immediately following the 1972 transformer failure that changed the industry. We understood early that poor diagnostics created unacceptable safety risks.
Today, our laboratories analyze tens of thousands of samples a year from:
- Power transformers
- Oil-filled circuit breakers
- Load tap changers (LTCs)
- Switchgear
- Reclosers
- Insulating fluids and specialty gases
No other organization matches the scale, expertise, and depth of experience TJ|H2b brings to diagnostic testing for high-voltage equipment.
Note: Our Integrated Management System (IMS) is intended to keep our data accurate, complete, consistent, and reliable. TJ|H2b laboratories are certified by globally recognized Certification Bodies (CB) and approved by nationally recognized Accreditation Bodies (AB). Our labs also have several environmental accreditations.
For copies of our certifications (ISO 9001, ISO 14001, ISO 45001) or accreditations (ISO/IEC 17025, Environmental Accreditations), please contact IMS Program Manager Jaleesa Ferris at ferris@tjh2b.com.
2. Proprietary Diagnostic Evaluations You Won’t Find Elsewhere
While most laboratories provide standard oil and gas analysis, TJ|H2b goes further with a set of proprietary diagnostic packages developed by our experts. These evaluations offer deeper insight into equipment condition and failure progression:
TCA®: Transformer Condition Assessment
A comprehensive evaluation that integrates DGA, oil quality, and additional fault signatures to produce a detailed health score. TCA® helps utilities identify incipient faults long before traditional metrics show abnormalities.
TASA®: Transformer Active System Analysis
Designed to detect internal active system degradation, including thermal faults, electrical issues, and anomalies not obvious through DGA alone.
BOA®: Breaker Oil Analysis
Provides targeted evaluation of oil-filled circuit breakers (OCBs), identifying contamination, thermal decomposition, arcing, and mechanical wear indicators. Utilities rely on BOA® to predict breaker performance and reduce misoperations.
BGA®: Breaker Gas Analysis
Analyzes gases within breaker circuits to identify emerging issues like detecting impurities, decomposition products, and leak progression that threaten insulation integrity.
These proprietary diagnostics are tailored to offer the most precise and detailed assessments. Additionally, TJH2b offers a variety of a la carte analytical testing at reasonable prices. Check out our services here.
3. Unbiased & Trustworthy Reporting
Not all testing laboratories are independent. Many companies offering oil sampling, repair services, or maintenance contracting also perform their own diagnostics.
This creates an inherent conflict of interest:
If the same provider performs both diagnostics and repair, there is a financial incentive (intentional or not) to recommend additional service work.
TJ|H2b removes that risk entirely.
We do not perform equipment repairs. We do not sell sampling equipment. We do not provide field labor.
We provide pure diagnostics and consulting:
- Unbiased reporting based solely on equipment condition
- Clear recommendations unaffected by sales cycles
- Trustworthy results for your asset management and CBM teams
- Greater confidence when presenting findings to leadership, regulators, or stakeholders
4. Efficient Turnaround & Rush Services
Time can turn a minor fault into a major failure. TJ|H2B prides itself on offering the fastest turnaround times in the industry for our diagnostic packages, ensuring that clients receive their reports promptly.
For those situations where time is of the essence, we also provide rush services to meet urgent needs. This commitment to efficiency helps clients address potential issues swiftly, minimizing downtime and maintaining operational integrity.
5. Expert Consulting Services Beyond the Lab Report
A lab report is only as valuable as the decisions it enables.
That’s why TJ|H2b provides interpretation, consultation, and strategic guidance that supports long-term asset health.
Our consulting services include:
- Detailed interpretation of all TCA®, TASA®, BOA®, and BGA® results
- Recommendations for maintenance, retesting intervals, and safe operational limits
- Failure progression modeling and trending analysis
- Asset management guidance supporting Condition-Based Maintenance (CBM) programs
- Education and training for utility teams (including presentations at TechCon and other industry events)
We help you translate diagnostics into action—strengthening your reliability strategy and preventing catastrophic failures.
Partner With the Industry Leader in High-Voltage Diagnostics
For more than 25 years, TJ|H2b has set the global standard for independent diagnostic testing, cutting-edge analysis, and specialized consulting in the electric utility industry.
If you’re ready to strengthen your asset management program, improve reliability, and reduce the risk of catastrophic failures, we’re here to help.
Contact TJ|H2b today to begin your diagnostic testing program or request more information about our proprietary evaluations.
Frequently Asked Questions
Q: What equipment does TJ|H2b test?
A: Transformers, oil-filled circuit breakers, LTCs, switchgear, reclosers, insulating fluids, and gas-filled equipment. Learn more about our diagnostic and sampling services here.
Q: Why choose an independent lab?
A: Independence eliminates conflicts of interest. Our recommendations are based solely on equipment condition, not on selling repair services.
Q: How quickly can I receive diagnostic results?
A: Standard results often arrive in 48–72 hours, with rush services available in under 24 hours.
Q: What makes your diagnostics unique?
A: Our proprietary evaluations: TCA®, TASA®, BOA®, and BGA®, provide deeper insight than standard oil or gas analysis alone.
Q: Can TJ|H2b help our team interpret results?
A: Absolutely. Consulting is a core part of our service. We help teams understand what the data means and how to apply it to utility maintenance decisions.
Q: Do you work with utilities outside North America?
A: Yes. While our labs are based in the U.S., we support utilities and industrial equipment worldwide. Learn more on our TJ|H2b Analytical Services Locations page.
