HV Testing

Circuit Breaker Lubrication

Developing circuit breaker lubrication procedures BY RICK YOUNGBLOOD, Doble Engineering Company Circuit breaker analyzers are used to determine operating speeds and velocity. This information enables…
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Latest Electrical Industry News

Utility Proactively Tests Underground Cable

Distribution companies are continually looking for ways to improve system reliability, all while conserving capital investments and operational costs. With an aging infrastructure, one of…
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Vacuum Interrupter Testing for Circuit Breakers

How to predict field life using vacuum interrupters BY FINLEY LEDBETTER, Group CBS Utilities have widely replaced older air-magnetic and oil interrupters for circuit breakers…
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Power Factor Testing of Circuit Breakers

Detecting contamination and deterioration in SF6 breakers to ensure longevity BY LINDA NOWAK, Doble Engineering Company The purpose of “Doble testing”, or power factor testing,…
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MV HV cable partial discharge measurement

Cable Testing Comes of Age - One Cycle at a Time

Field Testing of MV and HV cables has come a long way in recent decades. Gone are the days of old, when the traditional DC…
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Solving Underground Cable Problems with Partial Discharge Testing

How to prevent failure with partial discharge testing BY HENNING OETJEN, Megger Partial discharge (PD) measurements are increasingly used as a reliable and non-destructive diagnostic…
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IR Inspection Windows for Electrical System Reliability

An Infrared Inspection Window is used to separate environments of differing pressures or temperatures while allowing light energy at a specified electromagnetic wavelength to pass…
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PFT – 503CM

High Voltage Testing with AC Power Frequency

High Voltage, Inc. is a small design and manufacturing company located in the Hudson Valley region of New York State. Although small, we are a…
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HV Testing Articles

High Voltage Testing with AC Power Frequency

High Voltage Testing with AC Power Frequency

High Voltage, Inc. is a small design and manufacturing company located in the Hudson Valley…
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FERC Complaint Targets Duke, PJM Transmission Planning

FERC Complaint Targets Duke, PJM Transmission Planning

A coalition of large energy consumers and ratepayer advocates has filed a complaint with the…
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Detect Electrical Discharge Defects with Ultrasound

Detect Electrical Discharge Defects with Ultrasound

Electrical discharge is more common than we’d like to believe; even in new installations. Detecting…
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ACCELERATING TOWARDS GREATER TESTING EFFICIENCY - A true transformer test van

ACCELERATING TOWARDS GREATER TESTING EFFICIENCY - A true transformer test van

Test lead management, including quality of connection and correct lead placement, is an important part of…
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Circuit Breaker Time and Motion Testing

Circuit Breaker Time and Motion Testing

Determining mechanical condition of high-voltage circuit breakers BY JOZEF LEVI, Doble Engineering Company Life expectancy…
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