While heat is generally the enemy of power system transmission lines, strong winter weather brings a new set of challenges for utilities.
In the case of an emergency, natural disaster or major project, utilities can experience the need for a rushed shipment of product to get the power back on. If a utility does not have sufficient replacements in stock, they have to depend on a vendor to supply connectors quickly at a reasonable cost.
Owen Electric is located in Northern Kentucky and serves about 58,000 members. The Boone feeder stretches several miles out from the Boone substation. It has both single and three-phase conductors (12.47/7.2 kV, grounded Wye), with multiple taps branching off. The area is fairly hilly, rural and has lots of trees.
James Bridges, VP of Engineering, explains, “At that time, we believed that trees might be causing the momentary outages, but we did not see any evidence that trees were in the lines.
Protecting your substation from natural disasters is critical. We recommend periodic inspections and dielectric testing of your power apparatus bushings to ensure that they are prepared in the event of a natural disaster. Routine testing allows you to extend the service life of your equipment while lessening the risk of equipment failure, lost revenue and costly repair or replacement. However, hiring a testing service can be costly and time consuming.
Hot line maintenance appears to have begun in the early 1900’s with a few homemade tools. Tools and working methods improved vastly in the following decades. During that era, linemen realized the value of a protective shield to guard them and the equipment they were using from accidentally contacting an energized conductor.
Topics: Lineman Grade Tools
- To install substation arresters, follow the directions, recommended work practices and be safe.
- Inspect the packaging and product, looking for signs of damage.
- Verify kV rating on nameplate, carton/crate label and shipping documents all agree. If they do not, stop and contact Hubbell Power Systems, Inc. prior to installation.
- Locate and read all installation instructions included with the packaging. If there are any questions, now is the time to ask.
THE EMERGENT ERA
As Internet usage continues to experience double-digit growth, the demand for real-time, accurate data is growing at a similar pace. We are sharing information faster than ever and our human ecosystem is shifting to accommodate the transformation. The world on a whole is even moving faster; it is said that we walk 10% faster on city streets than we did a decade ago.
There are currently 3.6 billion people online, and within the next 18 months, another 2.2 billion are expected to join. By summer 2018, more than 80% of the world’s population will be online. From smart grid to "The Internet of Things", data is driving change in our industry and our day-to-day experiences.
Topics: Digital Transformation
For the hoist user, long-term dependable performance is easy to obtain by following simple work guidelines and exercising proper maintenance. Basic safety rules apply when using ratchet hoists.
Topics: Lineman Grade Tools
In an industry driven by the size of performance indices, minimizing the size of an outage is vital. Alabama Power does this by adding interrupting devices to the lines. "Just like everyone else, we're driven by SAIDI, SAIFI, MAIDI and MAIFI," said Robert Cheney, Team Keader of Alabama Power Test Lab. "We're taking a hard look at our system and figuring out what we can to do improve those numbers."
Each hot line tool should be wiped clean and visually inspected for defects before use each day. If any defect or contamination that could adversely affect the insulating qualities or mechanical integrity of the tool is present after wiping, the tool shall be removed from service and examined and tested in a manner prescribed by OSHA before being returned to service.