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NOMEX protective garment

Advanced protection against electromagnetic exposures and electric arc

HAZARDS AROUND

While working live in the energized grid, presence of voltage around the workers requires special attention. However, live-line (live working) techniques are widely applied for decades, several accidents in the past prove that the level of safety must be improved to minimize the number and seriousness of injuries in the future.
In the high voltage grid, bare-hand method is a common technique for safe live work. In the surroundings of any energized equipment,...

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Counterfeiting Kills

Each year, the counterfeiting of well-known brands and products continues to rise, creating an even more threatening problem. Such well-known counterfeited brands, including consumer safety and critical electrical products, are estimated to be five to seven percent of world trade. The International...

Introducing Intelligent Power Today

Welcome to Intelligent Power Today Magazine, our publication that explores and explains the who, what, where, when, why and how of intelligent electrical devices, a collection of complex mechanical devices and sophisticated control systems used in industrial, commercial, and institutional...

Electrical Safety

voltage testing

Absence of Voltage Testing – An Update on Accepted Approaches

Absence of voltage testing is a vital step in the process of verifying and establishing a de-energized state of any electrical system. As detailed in NFPA 70E clause 4.2.5., there is a specific and approved approach to establishing an electrical safe work condition with the following steps:

  • determine all possible source of electrical supply
  • interrupt the load current, open the disconnecting device for each possible source
  • verify where possible that all blades of the disconnecting devices are open
  • release or block any stored energy
  • apply lockout device in accordance with documented and established work procedures
  • using an adequately rated portable...

Compatibility Issues with Generator-Backed Power Systems

Line-interactive uninterruptible power supply (UPS) systems play a vital role in maintaining seamless operation during power outages. Their integration with backup generators, however, can pose challenges regarding synchronization and power quality.

While both UPS systems and generators serve as safeguards against power disruptions, their integration isn't always seamless. Understanding these compatibility concerns is crucial for ensuring reliable backup power and avoiding damage to sensitive equipment.

Visit Our UPS Systems Study Course

 

Voltage and Frequency Stability

Generators, particularly smaller portable models, may not provide the same level of voltage and frequency stability as utility power. Line-interactive UPS units are designed...

Popular Electrical Safety Articles

Frequently Asked Questions about Arc Flash Relays

Answering frequently asked questions about arc flash relays BY BOB ZWEIFEL, Littelfuse The dangers of an arc flash incident—burns, blast, molten metal ejected at ballistic speeds—are by now familiar to every electrical worker. Most electrical professionals have read about strategies to minimize...

Arc Flash Mitigation 101

While the threat of shock and electrocution from inadvertent contact with energized parts has long been recognized, the arc flash and arc blast hazards have only fairly recently been incorporated into the electrical safety standards. The U.S. federal agency the Occupational Safety and Health...

Electrical Safety Lessons Learned

How to reduce electrical-related deaths and injuries to zero BY JENIFER ROBERTSON, Electrical Safety Authority Consider this scenario: An electrician is modifying an electrical circuit in a ceiling space at an educational institute. To perform the task, he de-energizes his specific circuit, but...

Calculating Incident Energy

Over the last few decades, arc-fl ash hazards have been a significant concern for many electrical workers and employers. Many methods have been developed through the years to assess incident energy.The most common is that of the IEEE 1584, Guide for Performing Arc-Flash Hazard Calculations. These...