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.
Distribution lines are likely targets for lightning strikes. Once the lightning touches the line, the surge divides and travels both directions. The lightning surge will then probably cause an insulator to flash over. Why?
"In the old configuration, if we lost either feeder, 750-800 customers were without power until a trouble-crew drove out to open and close the switches to isolate the outage and restore power," shared the utility.
Power surges can damage electronic equipment if not adequately protected. Surge arresters protect a variety of equipment, distribution transformers, power transformers, underground cable, and insulators, from overvoltage. The proper arrester selection can prevent equipment damage.
In 2014, Hubbell Power Systems, Inc. (HPS) acquired RFL Electronics, a protection and communication equipment manufacturer. The addition of RFL to HPS’ family of brands broadened our substation offering and forged a partnership between territory managers and regional sales engineers to elevate the technical expertise HPS provides its customers. Jacksonville Electric Authority (JEA) witnessed the benefit of this newly formed partnership firsthand.
Topics: Substation Security