Blog

Mar 26, 2019 | Written by Dan Laird | Arc Flash and Electrical Safety, MEP Engineering

Medium Voltage Systems


Background

Medium Voltage (MV) is typically defined as the range of 600-100,000V. In standard voltages, this includes 4160V systems up to 69kV systems even though most equipment ratings stop at 38kV.

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Dec 20, 2018 | Written by Steve Matthews | MEP Engineering

It's Noisy in this Room!

Engineers are faced with learning and applying codes and standards and have a responsibility to do the absolute best we can when helping a client on a project.  We learn most from our experiences through years of hard knocks and, of course, from other experienced Engineers.

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Nov 27, 2018 | Written by Steve Matthews | Culturally Different, MEP Engineering

It's a Small World

Folks say it all the time! It’s a small world. What fortified it for me is the time my past employer asked me to fly overseas to a military base in South Korea. The Engineer of Record was not able to make the trip, and there had been some issues on a project where we needed to represent our interests and help the owner solve the issues.

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Oct 30, 2018 | Written by Jeff Silcox | MEP Engineering

Cryo-Electron Microscopy Laboratories – Planning for Success (Part 1 of 3)

Cryo-electron microscopy (cryo-EM), where a sample is studied at cryogenic (liquid nitrogen) temperatures and scanning transmission electron microscopy (S-TEM) are words we are hearing a lot these days. Cryo-EM is sweeping through the field of biology, rapidly replacing x-ray crystallography, providing researchers an unprecedented, high resolution view into molecular structure. 

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Oct 25, 2018 | Written by Dan Herzig | MEP Engineering

You Talkin’ ‘Bout Me?

"You talkin' to me? You talkin' to me? You talkin' to me? Then who the hell else are you talkin' to? You talkin' to me? Well I'm the only one here. Who the f*@# do you think you're talking to?" -Travis Bickle (Robert De Niro), Taxi Driver

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Oct 18, 2018 | Written by John Butterfield | MEP Engineering

Five Lessons from my Engineering Career


My perception of an engineering career started about the time I was in high school. I had visions of smart young engineers, armed with enthusiasm and technical knowledge solving complex problems that would make the world a better place.

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Oct 04, 2018 | Written by Dan Maxwell | Process Control and Plant Automation, MEP Engineering

Partners

It is important to have friends in our lives.  They are supportive and understanding. They can also challenge us and make us our best selves.  Friends in business are called partners.  There is a financial relationship between business partners but the best of these relationships have the same features as good friendships.

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Sep 06, 2018 | Written by Tim Laracy | Process Control and Plant Automation, MEP Engineering, Inspired Engineering

Becoming an Intern at Hallam ICS

About eight months ago, the engineering internship scramble was beginning at the University of Vermont.  Students all over campus were struggling to get a resume and cover letter to every engineering company around Burlington VT; maybe to get an interview, and maybe even to get a job.

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Aug 30, 2018 | Written by Dan Laird | Arc Flash and Electrical Safety, MEP Engineering

How to Interpret Harmonics Data – A Case Study

Power system harmonics are commonly created by Variable Frequency Drives (VFD’s), Uninterruptible Power Supplies (UPS), computer power supplies, and LED/fluorescent lighting. These devices draw distorted current which in turn distorts to overall voltage waveform.

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Aug 21, 2018 | Written by Dan Laird | Arc Flash and Electrical Safety, MEP Engineering

How to Program an SEL-351 Digital Relay


Background

The highest levels of arc flash energy are typically found at the secondaries of step-down transformers. This usually means the 480V main breakers, like the one shown above, will be over 40 cal/cm2. One method of mitigating this hazard is to install a manual reset recloser and digital relay on the primary side of the transformer.

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