Blog

Dec 06, 2018 | Written by Chris Giusto | MEP Engineering, Arc Flash and Electrical Safety

Combustible Dust Fundamentals & NFPA 652

With the compliance deadline for completing a Dust Hazard Analysis (DHA) less than two years away, and existing requirements already in place, it is a good time to revisit the “new” NFPA 652 Standard on the Fundamentals of Combustible Dust.  

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Oct 02, 2018 | Written by Dan Laird | Arc Flash and Electrical Safety

Do I Need a PE to Perform an Arc Flash Study

State boards of examiners for engineers are charged with protecting the public in any aspect related to engineering design. These boards take their mandate seriously given the grave consequences that can result from negligence or incompetence on the part of designers.

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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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Aug 13, 2018 | Written by Scott King, PMP | Arc Flash and Electrical Safety

The 7 Steps to Complete an Arc Flash Analysis


It is important to understand the process and the “behind the scenes” details of an arc flash analysis. My other posts describe the importance of an Arc Flash Analysis: how it saves lives and how to find the right information, In general, the following seven steps are required for the completion of a thorough arc flash analysis:

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Jun 28, 2018 | Written by Brian Crosby | Arc Flash and Electrical Safety, MEP Engineering

NFPA 70E Changes from 2015 to 2018 Standard for Electrical Safety in the Workplace – Article 120 and Article 130


Brian Crosby is a Senior Electrical Engineer for Hallam-ICS who leads a team of engineers to provide arc flash assessments and electrical safety training for clients throughout the United States.

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Jun 07, 2018 | Written by Brian Crosby | Arc Flash and Electrical Safety, MEP Engineering

NFPA 70E Changes from 2015 to 2018 Standard for Electrical Safety in the Workplace – Article 105 and Article 110


Brian Crosby is a Senior Electrical Engineer for Hallam-ICS who leads a team of engineers to provide arc flash assessments and electrical safety training for clients throughout the United States.

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Mar 01, 2018 | Written by Chris Font | Arc Flash and Electrical Safety

Arc Flash Detection Relays: Stopping an Arc Flash at the Speed of Light

Background

It is well known that the energy released during an arc flash event is governed by three variables.

  • The magnitude of the fault current
  • The working distance
  • The duration of the fault
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Jan 22, 2018 | Written by Brian Crosby | Arc Flash and Electrical Safety, MEP Engineering

NFPA 70E Changes From 2015 To 2018 Standard For Electrical Safety In The Workplace – Article 100 Changes


Brian Crosby is a Senior Electrical Engineer for Hallam-ICS who leads a team of engineers to provide arc flash assessments and electrical safety training for clients throughout the United States.  Brian recently attended training that detailed the changes made in the 2018 version of NFPA 70E.  For your convenience and quick reference, he has put together a series of blogs highlighting these changes.

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Dec 12, 2017 | Written by Dan Laird | Arc Flash and Electrical Safety

Looking Back On 2017-Creative Ideas For 480V Relay Protection

When discussing protective relays, most people think of medium voltage systems, or those above 600V. In 2017 we have noticed a trend to apply relays to the 480V side of industrial power systems. These relays can provide voltage, phase, overcurrent, and arc flash protection at the equipment most often serviced by maintenance personnel. Better protection of both people and equipment is a trend we would like to see continue.

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