Locating technicians must go through several steps to do a locate or trace. First, they open up an enclosure to isolate each wire from ground. Then they remove each grounding harness, so they can listen to find the line. However, the process of reassembling creates the potential for new problems. Nuts can get lost, bonds become loose, or harnesses can end up unattached.
The SureFit™ automatic splice was designed to minimize partial insertion errors, the most common failure with automatic splices. On other splices, partial insertion may occur during installation when the conductor has not completely passed through the jaws, reaching the area of the center stop.
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.
- 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.
All bolted deadends are rated 40% of the conductor RBS. Bolted deadends can be used in slack span applications where line tension is less than 5% of RBS.
Each utility has a set of guidelines for weather conditions in their area which takes into consideration ice and wind loading. If distribution connectors are installed properly (per manufacturer instructions) then everything should work as designed.
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.
An arc flash or arc flashover occurs when an electrical discharge goes through air. It can cause a bright visible light as well as damage the two objects it lands on.
When a hotline tap clamp is installed directly on a main line the arc goes from the bill of the hotline tap clamp to the main line.