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Overcurrent and Short Circuit Protection


Generator Protection


Smart Technologies in Generator Protection

The protection of electrical generators is undergoing a significant transformation with the integration of digital and smart technologies. These advancements, encompassing digital relays, smart sensors, and Internet of Things devices, are revolutionizing the way generators are monitored,...

Transformer Protection


Transformer Protection And High Impedance Faults

Electrical transformers are vital components of the power distribution network, ensuring the transfer of electricity across various voltage levels. Protecting these transformers from faults and failures is crucial to maintain the reliability and efficiency of the electrical grid. One of the...

Lightning Protection Systems


Lightning Protection in Safeguarding Power Grids

Lightning protection is crucial for maintaining the integrity and functionality of critical infrastructure, particularly power grids and communication networks. These systems are vital for the socio-economic well-being of communities and the smooth operation of various sectors. This article...

Motor Protection


Bearing Protection of Inverter-duty Motors

Although it is now common knowledge that inverters—also known as variable frequency drives—often induce unwanted motor shaft voltages, many customers who purchase three-phase alternating current (AC) induction motors do not realize that models labeled “inverter-duty” or “inverter-ready”...

Cybersecurity for Protective Devices


Intrusion Detection and Prevention Systems

The ever-increasing reliance on interconnected electrical protection systems necessitates robust cybersecurity measures. Intrusion Detection and Prevention Systems (IDS/IPS) play a vital role in safeguarding these critical infrastructure components from cyberattacks. This article explores the role...

Electrical Protection

Monitoring Circuit Breakers

Monitoring circuit breakers: Reviewing current testing methodologies

BY FINLEY LEDBETTER, Group CBS

Circuit breakers, from low-voltage molded case to high-voltage SF6 (sulfur hexafluoride) circuit breakers, all connect and isolate electrical loads from downstream machinery. While some breakers are used as disconnect switches, they are not designed for this purpose. Most breakers are used sparingly, giving technicians few opportunities to test the breaker’s operation without removing the breaker and downstream equipment from service.

To minimize downtime,...

Electrical Protection Articles