Have a question? We’ve got an answer! Learn more about Arc Flash Analysis, Arc Flash Risk Assessments, NERC Compliance, and more by reading through Wells Engineering’s Frequently Asked Questions!

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According to NFPA 70E, what is the purpose of shock flash risk assessments and arc flash risk assessments?

NFPA 70E Section 130.4 requires that a shock risk assessment be performed before beginning energized work, and NFPA 70E Section 130.5 requires that an arc flash risk study and assessment be performed to:

    1. Determine whether an arc flash hazard exists
    2. If a hazard exists, determine:
      • The appropriate safety-related work practices
      • The arc flash boundary
      • The correct PPE to be worn

What is arc flash analysis?

Steps include: Data Collection, Power System Modeling, Short Circuit Study, Protective Device Coordination, Arc Flash Calculations, Reporting, and lastly, Label Installation.

What is NERC Compliance?

NERC stands for North American Electric Reliability Corporation. Every entity must register with NERC through its regional entity. Grids are becoming more complex. New technologies are expanding. As such, NERC is aggressively enforcing existing and introducing new requirements. They are also adjusting the frequency of compliance reporting. By federal law, NERC is authorized to monitor and assess company compliance status. They can also issue sanctions and/or fines for non-compliance.

What is a short circuit study or short circuit analysis?

A short circuit study is required to determine the magnitude of current flowing throughout the power system at critical points at various time intervals after a “fault” occurs.

What is NERC Compliance Testing?

NERC Compliance standards MOD-025-2, MOD-026-1, and MOD-027-1 provide an accurate representation of the steady-state and dynamic response of generating units for power systems simulations. It is a challenging task. And Wells Engineering will assist you through the whole process.

When does an arc flash occur?

An arc flash occurs when an electric current passes through the air instead of along its intended path. The result is extremely high heat that can cause severe burns, blinding light, and an explosion that can result in hearing damage and potentially fatal injury.

What is testing and commissioning?

Wells Engineering provides unparalleled testing and commissioning services that promote long-term, efficient operation of electrical power equipment. No matter your power system size or age, proper equipment maintenance is essential to maximize power system reliability.

Proper maintenance isn’t just testing; power system owners need a good inspection, maintenance, testing, and periodic equipment rating evaluation for a true comprehensive maintenance program.

Wells Engineering’s knowledge base of electric power systems analysis, design, construction, and operation enables us to provide you with the development and implementation of a comprehensive maintenance program that meets NFPA 70E requirements to suit your needs both today and tomorrow.

What is relay testing?

Relay testing services include: Electromechanical & Solid State, Microprocessor, End To End Testing, Fault Simulations, Protection System Evaluation, IEC 61850 Compliant Testing, NERC Compliance Testing.

What is power systems engineering?

Power system analysis engineering software is an excellent tool for studying power systems but should not be used as a substitute for knowledge and experience. Wells utilizes many commercially available software packages and backs those tools with some of the most experienced individuals in the industry, across several applications.  We would appreciate an opportunity to demonstrate our analysis proficiencies with your next project.