Ryan Freeman

Mr. Freeman joined Hubbell Power Systems, Inc. in 2011 as a Design Engineer with a focus on the development of high voltage surge arresters. He transitioned to the role of Application Engineer in 2016 and is now the surge arrester Product Manager. He is an active member of the IEEE SPDC WG, IEC TC37, IEEE 693 WG, NEMA 8LA surge arrester section and CIGRE WG C4.39.

Recent Posts

Minimizing the Risk of Wildfires with the Hubbell Fire Protection Disconnector

Posted by Ryan Freeman on Aug 3, 2021 7:00:00 AM

Wildfires continue to devastate portions of the western United States, Australia and other regions across the world. These disasters can be attributed to a variety of factors. Utility companies, in turn, are working to minimize the fire risk posed by overhead lines.

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Topics: Arresters, Wildfire Mitigation

The 5 Key Attributes of a Reliable Surge Arrester

Posted by Ryan Freeman on May 16, 2021 2:00:00 PM

MOV, or metal-oxide varistor, surge arresters are widely applied to protect critical utility equipment and improve grid reliability. Surge arresters come in various designs to protect distribution, transmission and substation assets. The characteristics of the surge arrester are customized to meet the varying requirements of each application. IEEE and IEC standards govern the minimum requirements for all surge arresters, however other characteristics must be considered to meet Hubbell’s demanding quality standards.

There are numerous traits that ensure the quality and longevity of MOV surge arresters. Five key characteristics tend to overshadow others. These include:

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Topics: Arresters

The Importance of Lead Length for Arrester Applications

Posted by Ryan Freeman on Aug 17, 2020 1:00:00 PM

A commonly overlooked consideration in arrester applications is the impact of lead length. The inductance of lead wires can produce an inductive voltage drop which in turn will lower system protection. This voltage drop only occurs if the lead carries surge current and is in parallel with the equipment being protected. This resultant voltage is added to the discharge voltage of the arrester during a surge event, thereby reducing the protective margin of the system. The lead wire’s inductance is not strongly influenced by conductor diameter, but rather of overall lead length. Therefore, care must be taken to keep the lead length to a minimum in both distribution and substation applications.

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Topics: Arresters

Getting Started with Surge Arrester Specifications

Posted by Ryan Freeman on Jun 10, 2020 8:00:00 AM

With the recent and upcoming revisions of IEEE C62.11 and IEC 60099-4 surge arrester standards, writing a technical specification for arresters can be challenging for both new and experienced engineers. Most arrester manufacturers have a dedicated team of engineers who are familiar with the evolving standards and can support the revision and/or creation of arrester specifications.

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Topics: Arresters

Arrester Field Testing

Posted by Ryan Freeman on Aug 6, 2018 2:09:00 PM

All Hubbell Power Systems surge arresters are factory tested according to IEEE C62.11 and IEC 60099-4 routine test requirements. Once in use, surge arresters do not require field testing for routine maintenance. If arrester field testing is desired there are several test options with varying levels of usefulness and convenience.

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Topics: Arresters

Line Performance Improvement

Posted by Ryan Freeman on May 1, 2018 2:26:00 PM

Consumer demands for reliable electric power have continued to increase over the years with technological advances. The prevalence of high tech devices has required utilities to provide near uninterrupted service. 

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Topics: Arresters, Transmission

The Evolution of Surge Protection Technology

Posted by Ryan Freeman on Jan 16, 2018 10:24:36 AM

Lightning protection devices date back to the mid 1700’s. Early technology, such as the lightning rod, originally provided protection for homes, before being adapted for use on the telegraph and electric grids.

The modern term “arrester” was first used in the mid 1800’s for simple gap devices that protected telegraph lines. These products consisted of a simple gap and could be operated remotely by the telegraph worker. 

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Topics: Arresters

11 Tips for Installing Line Arresters

Posted by Ryan Freeman on Dec 5, 2017 10:36:00 AM
  1. Follow the directions, recommended work practices and be safe when installing line arresters.
  2. Inspect the packaging and product for signs of damage.
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Topics: Arresters