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Zensol new instrument for OLTC testing

According to CIGRE A2.34, the dynamic resistance measurement or DRM (OFFLINE) is a test that offers diagnostics for several diverter or selector switch malfunctions such as: contact problems, broken springs, broken transition resistors, poor contact pressure, inadequate transition time, momentary...

Transformer Oil Regeneration and Corrosive Sulfur

Enervac International ULC has been examining this issue for over 14 years with the help of our customers, mainly international power utilities, transformer manufacturers and transformer service companies. TRANSFORMER OIL REGENERATION PROCESSThe principal functions of the insulating fluid are to...

Protecting Electrical Sites with Intelligent Security Lighting

There are over 70,000 electrical substations in the United States. A simultaneous attack on several of them could destabilize the grid and cause widespread blackouts. But even a non-targeted event like vandalism or copper theft can also cause substantial damages, easily reaching into the tens of...

Communications, Data Hardening, and the Smart Grid

The SmartGrid continues to expand and gather new functions as needs expand. Automated metering, relay operation, RTU operation, electric management systems, remedial action schemes, SCADA, field reclosers, Synchrophasors, remote access, weather, and earthquake monitoring and future needs still yet...

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 (Direct Voltage/Current) hipot was the recommended method for testing these modern cables that form the critical backbone of the distribution electrical power network....

Detect Electrical Discharge Defects with Ultrasound

Electrical discharge is more common than we’d like to believe; even in new installations. Detecting these defects poses a serious challenge, particularly at an early stage when there is still time to initiate corrective actions. Vigilant technologies help reduce the risk of arc flash...
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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 large presence in the electrical test equipment industry with a representative organization covering most of the world and a highly respected product line used in a variety of industries and applications.

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Most of our products produce high voltage and can be grouped by output waveform. We offer ac and...

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digital protective relays
electrical charge
battery life diagram
electrical charge

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Transformer Failures Relevant to Protective Relaying and Transformer Diagnostic Testing

G&W Electric – Engineering the Next Evolution of Power

Precursor to Life Extension

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Everlast Transformer Cable Markers

Transformer Labels for Utility Equipment

MTS-5100 - Protective Relay Test System

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Electricity Today T&D Magazine - Substations Summer 2020 Special Edition

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Electricity Today T&D Magazine - Substation July&August 2019 Special Edition

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Electricity Today T&D Magazine - Smart Grid Summer 2018 Issue