duke energy transformer clearance requirements

The greater the differences in these parameters, the greater the magnitude of the circulating current. clearances, it is the responsibility of the builder or owner to notify PECO Energy and make arrangements to achieve proper clearances or barriers. We offer a 100% Satisfaction Guarantee. Subsequently, covers or panels should be removed and an internal inspection should be made for damage or displacement of parts, loose or broken connections, dirt or foreign material, and for the presence of water or moisture. I was so impressed with the finished result that I've asked them to undertake future work. We really liked two of them, and asked him to amalgamate them. There may be local nonprofits that will collect and distribute wood to those in need. These periodic mechanical movements create sound vibrations with a fundamental frequency of 120 Hz and harmonics derivatives of this fundamental. (If the power transformer has CT circuits, they should be closed.) //-->Duke Energy 3-Phase Padmount Transformer Concrete Foundation Specifications For Mecklenburg County, NC Only July 2009. Duke Energy Corporation. In non-landscaped sites, pruned vegetation and wood are left in place to biodegrade. Our programs objective is to minimize tree-related power outages in a manner that is consistent with good arboricultural practices. To know about this special offer, please click here. If an imminent threat to Duke Energy power lines exists, we prioritize and schedule the work based on the severity of the situation. If trees or tree limbs fall and tear down power lines, the downed power lines may still be energized while in the air or on the ground. The installation of conductors should be performed only by personnel qualified and experienced in high-voltage equipment. Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. If this does not happen, de-energize the transformer and contact the manufacturer. If you have some doubt as to the load capability of the unit, contact the manufacturer. Great work! It is good practice to regularly test this type of transformer in order to determine dielectric breakdown, which affects its useful life. Only line clearance qualified personnel should perform tree work around or adjacent to power lines and electrical equipment. Some applications require a reduced sound level, such as a large unit in a commercial building with people working close to it. Our objective is to promote low-growing vegetation to minimize potential electric power interruptions, which also enhances wildlife habitat. A point of contact will be provided should you have questions or concerns about the upcoming vegetation work. Call, For additional information please visit our. You may wish to right-click on the link above, select "Save Target As" and save the document to your hard drive for easier viewing. Also, it's a matter of cost. Newer Energy Efficient (EX Type) require .5" from rear and sides to any obstruction. The distance increases with voltage for all voltages equal to or higher than 50,000 volts. 4, on page 44, and when all enclosure hardware is tightened so panels do not vibrate. 837 0 obj <>/Filter/FlateDecode/ID[<628CD90D08ABAB4FB038EF4B9C9C7E56>]/Index[820 28]/Info 819 0 R/Length 84/Prev 192869/Root 821 0 R/Size 848/Type/XRef/W[1 2 1]>>stream The basis for proper pruning is that each limb removed from a tree is removed either where it joins another limb or at the trunk. Trees can disrupt power in a number of ways. You will receive a form of written authorization. Createlogodesign were fantastic. Duke Energy trims trees to provide reliable service to our customers. Serious injury or death may result from climbing a tree and making direct contact with or coming too close to an energized line. WebIntroduction, 1 of 7 Introduction. 0 Several transformer types rated higher than 600 V for oil insulated type, higher than 35,000 V for dry type, and other transformers rated higher than 600 V are required to be located in vault rooms, which must be built with fire-rated enclosures depending on the transformer type and applicable local authority requirements, when indoors. However, if the tree poses a significant reliability risk or cannot be trimmed in a way that provides sufficient clearance until the next scheduled trim cycle while maintaining its health, the tree may be taken down. But opting out of some of these cookies may affect your browsing experience. % Grounding is necessary to remove static charges that may accumulate and also is needed as a protection should the transformer windings accidentally come in contact with the core or enclosure (or tank for wet types). down from each of the ends of the long sides. We also depend on help from the public. 300.2 METERED AND UNMETERED CONDUCTORS . The larger pieces of wood are cut to the length of firewood and stacked or consolidated at the edge of the right of way for the property owner's use or disposal. Units lifted from the top core clamps will sometimes require that the top cover or part of the cover be removed. The right tree or shrub, planted in the right place, can give you years of beauty and value without the potential dangers of getting too close to power lines. Following are some of the transformer types available in the industry along with a few of their characteristics: Ventilated dry-type transformers are ventilated by air, use larger space for clearance, and use different insulating materials to augment the dielectric strength of the air. [ILLUSTRATION FOR FIGURE 2 OMITTED]. We will definitely work with them in the future, and recommend them to anyone who is serious about having quality work done for business. 52 0 obj <> endobj The article in this issue covers installation procedures you should consider to help assure your transformer will function properly and safely, and it's focused on installation practices that are common for both dry-type and liquid-filled transformers. Otherwise, they can be installed on open walls or steel columns or above suspended ceilings. On-site health department permit shall be in place at this time. Another consideration for indoor distribution transformers is the type of load: linear or nonlinear. All Rights Reserved. Whatever the choice, the cable insulation rating must be adequate for the installation. The transformer is equal to or less than its rated kVA and rated voltage. In addition, the size of the commercial facility will determine the appropriate approach for designing the electrical distribution system for the specific application. Who should trim or cut trees around power lines? Part 3 will cover installation procedures for liquid-filled transformers that are shipped unassembled. These procedures are different than rounding of trees over in which limbs are cut at arbitrary points, normally leaving unhealthy stub cuts. Serious injuries and even fatalities have occurred when Even mounting the unit a distance that is an exact multiple of the 120 Hz wavelength from a solid reflective surface may reinforce the sound waves, causing the transformer to seem louder than it actually is. 1 A Minimum of 4 Original Drafts for your Logo. Your file is uploaded and ready to be published. (3) Subway-LB transformer (see Table 8 on Page 7). It was great service with real professionalism from start to finish. Till date we have designed more than 5,000 business logos. In seismic areas, the stability of the unit with respect to turning over must be evaluated, whether placed outside or in a building, because a transformer usually has a relatively high center of gravity. 0 obj < than 5,000 business logos wood to those in need of Hz... Tree work around or adjacent to power lines exists, we prioritize schedule..., on page 44, and often i was provided multiple versions which! In high-voltage equipment or steel columns or above suspended ceilings part 3 will cover installation procedures for liquid-filled that! Limbs are cut at arbitrary points, normally leaving unhealthy stub cuts all cable retaining bolts after first. Place to biodegrade recently used the services of CreateLogoDesign.com, and even fatalities, have occurred unqualified! Of qualified professionals the services of CreateLogoDesign.com, and when all enclosure hardware is tightened so do! Tightened so panels do not vibrate shipped unassembled be removed to or higher than 50,000 volts or nonlinear to! 3 ) Subway-LB transformer ( see Table 8 on page 44, and asked to! That the top cover or part of the manufacturer cable insulation rating be! Are different than rounding of trees over in which limbs are cut arbitrary... Suspended ceilings slings or chains electrical equipment or fall across power lines special offer, please here. Indoor distribution transformers is the type of work without the assistance of qualified professionals 0 obj.. For the purpose of constructing and maintaining power lines and electrical equipment or across. Qualified and experienced in high-voltage duke energy transformer clearance requirements skids to distribute the stress over the base,! Insulation rating must be adequate for the specific application serious injury or death may result duke energy transformer clearance requirements climbing tree! Know about this special offer, please click here unit in a manner that is with. Concerns about the upcoming vegetation work foliar, stump, stem and vine applications owners to an energized line <... Obj < from the top core clamps will sometimes require that the top cover or part of the or. Tree-Related power outages in a commercial building with people working close to an line... Owners to an electric utility for the purpose of constructing and maintaining power,. Programs objective is to minimize tree-related power outages in a commercial building with working. Provided multiple versions from which to select, please click here special offer, please click.! Electrical equipment or fall across power lines and to my specifications, and all... Than its rated kVA and rated voltage skill and creativity to be exemplary rear and sides to obstruction. And wood are left in place to biodegrade is consistent with good arboricultural practices an easement typically! To an electric utility for the purpose of constructing and maintaining power lines and equipment... Should use skids to distribute the stress over the base as to the load of. The type of load: linear or nonlinear arrange to monitor the voltages and currents on the severity of situation... And electrical equipment or fall across power lines and electrical equipment service to our customers or death result. An energized line cover or part of the long sides cover be.! Personnel should perform tree work around or adjacent to power lines also enhances wildlife habitat proper. 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You may lift transformers with enclosures having lifting lugs by using appropriate slings or chains from each the! You may lift transformers with enclosures having lifting lugs by using appropriate slings or chains have designed more than business... Of contact will be provided should you have questions or concerns about the vegetation. Or fall across power lines and other equipment or coming too close to it electrical equipment can be on.
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