Some panel meters have been in continuous service for over 40 years. Although rugged and reliable, both analog and digital meters are subject to wear and electrical or mechanical damage. Some will eventually need to be replaced. Selecting a replacement meter can be a simple or difficult process, depending on a few key questions. (more...)

Gate Position is a critical parameter in hydroelectric power production. The output power of a hydroelectric generating station is regulated by adjusting the flow of water into the facility’s turbines. (more...)

Improper instrumentation grounding and shielding can cause measurement errors and degrade reliability in instrumentation and control systems. An understanding of these factors is essential for both system design and installation.
How Many Grounds?
The term ground is used in several ways. It can be a direct physical connection to the Earth, (more...)

Current transformers (CTs) are used in many applications that require current, power or energy monitoring. Examples include power generation, submetering, protective relaying, motor control, and machine fault detection. Selecting a current transformer involves picking the style, ratio, burden, accuracy and insulation to (more...)

Electrical fault detection is the process of identifying failures in an electrical system. These failures can range from minor disruptions to catastrophic events that damage equipment and injure people. Early and accurate detection is essential to minimize consequences and speed recovery. (more...)