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Looking for insight on electrical testing?


Join Megger’s expert Applications Engineers and Product Managers in our upcoming webinars:

Basic Transformer Testing

Testing Tactics Webinar:

Basic Transformer Testing - Winding Resistance, Turn Ratio, and Power Factor Best Practices


10 a.m. CT Friday, February 17


Attendees of this webinar are eligible to receive 

1 NETA CTD and either 1 PDH or 0.1 CEU

A Power System is a complex network of key high voltage components working in symphony to provide us electricity. Power Transformers are a key crucial component that helps step-up/ step-down voltage, such that power can be transmitted to large distances and are designed to be in continuous operation. Hence life and reliability of the transformer can be of paramount importance. Typically, the transformer's health is at its peak when initially manufactured and tested, and over time, stresses like higher voltage spikes, fault current, harmonics, overloading, transportation, etc. bring down the withstand capability as well as the performance characteristics of the transformer.


Regularly scheduled maintenance can help detect these problems at a much sooner stage and help improve the life and reliability and performance of the transformer. The intention of the webinar is to go over the basics of transformer testing, especially covering winding resistance (WR), transformer turns ratio (TTR), and power factor (PF) testing. How to best perform these tests, what the results mean about the transformer's health, and what kinds of problems can be detected with these testing.


Ravi Gupta



Ravi Raj Gupta received his Master's in Advanced Electric Power Engineering and Electrical Engineering from Michigan Technological University. He's the Substation Applications Engineer at Megger Americas. His responsibility includes providing technical and engineering support for various testing equipment at Megger. This equipment primarily helps in testing Transformers, Circuit Breakers, and other Substation equipment.


He has previously worked with Siemens as a Lead Application Engineer and a Business Development Manager for their Voltage Regulators within the Transformer division. He holds an Engineering in Training certification from Michigan.

Interpreting the Test Results for High Voltage Circuit Breakers

Testing Tactics Webinar:

Interpreting the Test Results for High Voltage Circuit Breakers


10 a.m. CT Friday, March 17


Attendees of this webinar are eligible to receive 

1 NETA CTD and either 1 PDH or 0.1 CEU

High Voltage Circuit Breakers (HVCB) are very complex electromechanical devices and critical components within an electrical power system. They are responsible for interrupting nominal and short circuit currents in addition to performing routine switching in the overall power system configuration. Effective execution of the close, open, close-open, and reclose sequences is required when demanded.

Numerous tests such as coil current, main, aux and PIR contact timing, travel measurement, static, and dynamic resistance measurement (SDRM) can be conducted on high-voltage circuit breakers to evaluate the operational effectiveness. Regardless of the breaker type (dead or live tank, single or multiple breaks per phase), breaker insulating media (air blast, oil, vacuum, or gas), or breaker operating mechanism (spring, electromagnetic, hydraulic, or pneumatic), it’s important to test their components regularly to help ensure proper operation in case of a system fault or switching operation.

The proper interpretation and understanding of the breaker test data can provide vital insight when assessing the health and condition of the electromechanical components of the breaker. This presentation aims to arm the user with knowledge in interpreting HVCB key test results (timing, motion, DRM, Coil health) in order for the user to take decisive action during commissioning, maintenance, or troubleshooting testing. Limits, as well as evaluating and trending criteria will be discussed as part of the tools for the analysis and interpretation of results.


This is a free webinar

All webinar attendees are eligible to receive 1 NETA CTD and 1 PDH or 0.1 CEU. 

Nnadozie Eronini
Substation Application Engineer


Nnadozie Eronini is a substation application engineer at Megger North America where he provides engineering and technical support. He was previously an electrical engineer where he oversaw risk assessments and evaluations on electrical fleets.


Nnadozie received his BS in electrical and electronics engineering from Texas Tech University in 2018.

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