Protection from Hazardous Step and Touch Potentials

Posted by Billy Webber on Jul 18, 2018 3:48:20 PM

When overhead electrical line workers employ proper personal protective grounding practices they are usually protected from electrical hazards that might arise from working on de-energized lines and equipment. But, what about workers at ground level? How are they protected, and from what kinds of situations are they protecting? The answer is from hazardous differences in step and touch potentials.

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Topics: Lineman Grade Tools

7 Questions to Identify the Right Elbow

Posted by Todd Neville on Jul 16, 2018 10:41:00 AM

It can be a challenge to identify the right elbow for varying applications. There are so many different points to consider when planning for your utility. Therefore, we put together seven simple questions to help in the process of picking the right elbow.

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Topics: Cable Accessories

How to Properly Attach an Arrester Drain Wire

Posted by Todd Neville on Jul 12, 2018 1:53:00 PM

Elbow and parkingstand arresters are provided with a ground wire as well as a grounding eye for attaching a No.14 or equivalent drain wire. It is important to understand the correct way to install the drain wire, so that it does not negatively impact the performance of the arrester.

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Topics: Cable Accessories

Why Implement Pilot Protection Relaying for Line Protection?

Posted by Brian Dob on Jul 9, 2018 11:31:00 AM

Pilot Protection Relaying uses a communications channel (pilot channel) to provide coordination between the line protection relays. The relaying system is an advanced alternative to Step Distance Relaying which requires no communication and therefore manual coordination between relays.

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Emergency Preparedness

Posted by Hubbell Power Systems on Jul 9, 2018 9:05:00 AM

THE IMPORTANCE OF EQUIPMENT REPOSITIONING

In recent years, the U.S. has been faced with several different types of natural disasters from devastating floods, tornadoes and hurricanes to Super Storm Sandy. These disasters have made us rethink how to ensure the safety and reliability of our infrastructure and facilities.

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Topics: equipment repositioning

13 Tips for Installing Underground Separable Connectors

Posted by Hubbell Power Systems on Jul 3, 2018 8:47:00 AM
  1. Ensure cutback dimensions are accurate and all cuts are square.
  2. Do not nick or cut the shield, insulation or conductor when preparing the cable. This can lead to over-heating and dielectric failure. 
  3. Terminate the metallic shield as close to the separable connector as possible. Do not expose more of the semi-con than is recommended.
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Topics: Cable Accessories, Underground Separable Connectors, Connectors

Selecting Zinc Sleeves for Toughened Glass Bell Insulators

Posted by Robert Ransone on Jun 29, 2018 10:50:00 AM

When designing a high voltage transmission line utilizing toughened glass bell insulators, engineers must consider whether or not to specify a zinc sleeve to accompany the insulator pins. Although the upfront cost is slightly more than the forged steel pin, those who are new to the use of toughened glass bells may ask what justifies a slightly higher expense for the addition of this feature.

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Topics: Insulators

12 Tips for Installing Loadbreak Elbows

Posted by Todd Neville on Jun 26, 2018 2:50:00 PM
  1. Follow all safe work practices and recommended work procedures.
  2. Review instruction sheet. Form cable, with no sharp bends, to the bushing. Terminate the metallic shield (neutral) as close to the separable connector as possible. Do not expose more of the semi-con than is recommended.
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Topics: Cable Accessories

Substation Arrester Selection

Posted by Haley Engel on Jun 13, 2018 10:04:00 AM

Surge arresters can extend the life of system assets by limiting the voltage across expensive substation equipment during a switching surge event. Station class arresters must be carefully selected to provide the best protection.

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Topics: Arresters, Substation

Redesigning a Classic — A Brand New Drop-Over

Posted by Jennifer Woody on Jun 10, 2018 11:32:00 AM

Available in two sizes, the new Hot Box® PEZ (Polyethylene EZ) drop-over features visual and structural enhancements with our dependable quality and performance. The structurally enhanced High Density Polyethylene (HDPE) construction streamlines manufacturing time which enables stock items to generally ship within 5 business days of order from our facility in Rocky Mount, North Carolina. Also, as a result of the structural enhancements, the enclosure has more space inside and outside of the product.

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Topics: Enclosures