Utility overvoltage protection with surge arresters | Eaton PSEC

A surge arrester is a protective device for limiting voltage on equipment by discharging or bypassing overvoltage. In this video, Brian Bertini, Utility Application Engineer, explains how overvoltage protection is essential to address power quality issues and maintaining the reliability of utility infrastructure.

Brian walks us through several topics including:
Overvoltage protection explanation
the impact of overvoltage on utility power systems
how surge arresters guard and prevent infrastructure damage
Sources of overvoltage
lightning, ungrounded transformers, ferroresonance, and line-to-ground faults.
the effects of lightning on power lines
Types of surge arresters and design
secondary, distribution, intermediate, and substation
metal oxide varistors (MOVs) function within surge arresters
Selecting a surge arrester
details utility engineers must consider such as maximum continuous operating voltage (MCOV), basic installation level (BIL), temporary overvoltage (TOV), lead length, and geographical location.
Arrester Failure and Isolation
the role of isolators in disconnecting failed arresters from the system
without the isolator, it would become a permanent ground fault
Underground distribution protection
underground cables are susceptible to propagating surges
the phenomenon of voltage doubling explained

Learn more about the fundamentals of surge arresters, including secondary, distribution, intermediate, and substation: https://www.eaton.com/us/en-us/produc...

Learn about the types of surge arresters Eaton offers: https://www.eaton.com/us/en-us/produc...

Thank you for watching one of our many educational videos on the topic of power systems. Schedule a visit to one of Eaton's Power Systems Experience Centers in either Pittsburgh or Houston to learn more!

To learn more about Eaton products and our Power Systems Experience Centers: http://eaton.com/experience

To view more educational videos from Eaton's Power Systems Experience Centers: http://videos.eaton.com/experience

Chapters
00:00
00:12 Title
01:01 Sources of overvoltage
01:47 Types of arresters and how they work
03:42 Arrester selection
06:01 Eaton Evolution arrester benefit
07:24 Underground distribution protection

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