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Substation Testing

Digital Twins for Substations: Bridging the Physical and Digital Worlds

In the rapidly evolving landscape of power grid management, digital twin technology is emerging as a game-changer for substations. By creating virtual replicas of physical assets, digital twins bridge the gap between the physical and digital worlds, enabling enhanced operational efficiency and...

CONDITION MONITORING IN AN AGE OF MODERNIZATION How (and Why) to Adapt

The widespread application and use of electricity, which may now seem like a simple commodity, is considered one of the greatest technical developments of all time. However, keeping up with today’s demand for power is anything but simple: a vast amount of resources goes into maintaining a...

Transformer Testing

Dielectric Voltage Testing – Standard Methods

There are two standard methods from ASTM International: D877, Standard Test Method for Dielectric Breakdown Voltage of Insulating Liquids Using Disk Electrodes, and D1816, Standard Test Method for Dielectric Breakdown Voltage of Insulating Oils of Petroleum Origin Using VDE Electrodes. VDE stands...

New York's Path to 8.5 GW of Grid Flexibility by 2040

New York State's transition to a clean, zero-emissions energy grid could include up to 8.5 gigawatts (GW) of grid flexibility by 2040, according to a new report from the Brattle Group. This projection, while contingent on achieving ambitious decarbonization goals, illustrates how the state could...

Cable Testing

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 method to detect weak spots in the insulation of underground cables. Routinely, partial discharge measurements are...
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Circuit Breaker Time and Motion Testing

Determining mechanical condition of high-voltage circuit breakers

BY JOZEF LEVI, Doble Engineering Company

Life expectancy of a newly installed high-voltage circuit breaker is approximately 40 years. Throughout its life, under normal circuit conditions, the circuit breaker will operate less than ten minutes. During abnormal circuit conditions, the breaker will operate less than one minute in its lifetime.

The primary goal of circuit breaker testing is to determine the condition of the circuit breaker. Breakers have...

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Electrical Testing & Maintenance Handbook Volume 5

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Electrical Maintenance Handbook, Vol. 10

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Aerial Lift Test Sets - Alt Series Product Catalog