Electric utility operating system reliability is an important factor of utility performance. As a common practice, distribution arresters are assembled with a ground lead disconnector (GLD) designed to respond to arrester fault current during a short by detonation of a cartridge inside of the disconnector housing.
On Sunday, June 9, 2019, a severe storm hit Dallas-Fort Worth, Texas resulting in more than 350,000 Oncor customers losing power. Reported as the sixth largest storm in Oncor’s history, Hubbell Power Systems, Inc. immediately offered support to help restore power as quickly and safely as possible.
Topics: Storm Response
Four years, several prototypes and thousands of installations later, Hubbell has satisfied Alliant Energy’s need for a stronger neutral clevis.
Alliant Energy identified the need for a better neutral clevis more than a decade ago. Their distribution system has an under-hung neutral and some neutral conductors were attached to poles with vertically mounted clevises. In other words, the neutral was held to the side of the vertically-oriented, spool insulator by a steel tie wire.
Topics: Pole Line Hardware
Rising water can damage or weaken existing transmission line and substation utility foundations. In flooded areas, drilled shafts and driven piles need to be inspected to determine if damage has occurred as a result of erosion. Here’s what you need to check:
In Alaska, the 115-kV Quartz Creek transmission line connects two hydroelectric dams on the Kenai Peninsula with the ‘rail-belt’ — an area containing Alaska’s railroad, its most populous cities and about three-fourths of the state’s population. A ﬁfteen mile section of that line was rebuilt last November, in an area where snow storms regularly drop feet of snow throughout the winter.
The Versa-Tech® I and Versa-Tech® LT reclosers use a 2.4GHz remote radio to communicate over WiFi. Utilizing this option, there is no need for a local radio. The module is compatible with Versa-Tech I recloser running firmware versions 3.xx or 4.xx and with Versa-Tech LT recloser running firmware version 5.xx. The WiFi radio attaches in the same location as the Digi/XBee and SiFLEX radios and has the capability of communicating up to 100 feet from the recloser.
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.
Topics: Equipment Repositioning
- Ensure cutback dimensions are accurate and all cuts are square.
- Do not nick or cut the shield, insulation or conductor when preparing the cable. This can lead to over-heating and dielectric failure.
- Terminate the metallic shield as close to the separable connector as possible. Do not expose more of the semi-con than is recommended.