If the structure is wooden and 30 to 40 feet tall with or without transformers attached, it is typically a distribution pole. Although there are no moving parts in a transformer, the core does generate sound. If these parameters are different, circulation current will exist in the circuit loop between these units. Click here to start this process. Analytical cookies are used to understand how visitors interact with the website. Therefore, it's advisable that you seek guidance on this matter from an engineer knowledgeable in seismic supports and the associated code requirements. Your Satisfaction is Guaranteed! September 14, 2022. Blue Lake Rancheria. %PDF-1.6 % Can tree species that are compatible with a distribution line right of way be removed during routine maintenance? After applying proper torque, you should wait a minute or so, and then re-tighten all bolts to the specified torque. 52 0 obj <> endobj *[L EgptA80~@GI#Q@hxMGPhMgoQ ] $ k. This tool is a safer and more effective alternative to sending crews on foot to perform backpack spraying in rough and mountainous terrain or hard-to-access areas, while also maintaining effective vegetation management along our power lines. Other site considerations require closer analysis. You should consider contributing to our CFE Media editorial team and getting the recognition you and your company deserve. Such terminations are available from electrical distributors. . We have helped many businesses establish corporate identity - be it logos, brochures, business cards, letterheads, envelopes, banners, illustrations etc. 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. Develop a procedure for inventory of all tools, hardware, and any other objects used in the inspection, assembly, and testing of the transformer. We are delighted with the end result, it looks incredibly professional. Part 3 will cover installation procedures for liquid-filled transformers that are shipped unassembled. Duke Energy Corporation. On-site health department permit shall be in place at this time. Consult the transformer diagrammatic nameplate for information on what tap must be used to correct for extra high or extra low incoming line voltage. Before applying any voltage to the transformer, you should make sure that the tank for wet-types, or the enclosure and core assembly for dry-types, is permanently and adequately grounded. Duke Energy uses aerial application of herbicides in areas with high brush density and rough terrain and that are hard to access to control trees and other vegetation that can pose power outage threats. 847 0 obj <>stream Transformers are usually designed and built to provide good electrical connections using either copper or aluminum cable. 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). Oil-filled transformers are constructed with the windings encased in an oil-tight tank filled with insulating mineral oil. For this test, apply a low-voltage (240V or 480V) to the high-voltage winding and measure the output at the low-voltage winding. If the structure is wooden, round or square concrete, or metal lattice tower or H-frame (a two-pole structure) and typically over 60 feet tall, it is a transmission structure. hb```7,^ cb'60H6wZ $(|`n`h`` ``{_j j[e13b{@38O=)HpG17hCDC i. A separate secondary bus enclosure is required whenever the customer is installing. The average temperature of the cooling air during a 24-hour period is 86 F. The temperature of the cooling air at no time exceeds 104 F. Two good references to dry-type transformer requirements are ANSI/IEEE C57.12.01-1989, IEEE Standard General Requirements for Dry-Type Distribution and Power Transformers Including Those With Solid Cast and/or Resin-Encapsulated Windings, which addresses general requirements, and C57.12.91-1995, IEEE Test Code for Dry-Type Distribution and Power Transformers, which addresses testing. Great service. 4 0 obj 1&Ub64#C #") "7KWpzJz1YeHB.r32Az{`gC~;jiV[Ceb*1rAz96lnA|3$ Non-ventilated Transformers should be a minimum of 3 inches from any obstruction on all sides and top. 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. When does Duke Energy trim a tree versus take down a tree? The loads, which are calculated as part of the building electrical system design phase, are shown in the construction documents respective equipment schedules in VA or kVA. *[L EgptA80~@GI#Q@hxMGPhMgoQ ] $ k, `h`` ``{_j j[e13b{@38O=)HpG17hCDC i. Line side (unmetered) and load side (metered) conductors shall not occupy the same raceway or enclosure. The foundation should be constructed of reinforced, air entrained concrete having at least 3000 psi compressive strength at 28 days after pouring. system or end user to connect to any of the Duke Energy Midwest transmission systems must be submitted by written Application addressed as follows: Attention: Director, Midwest If you see a downed line, always assume it is energized and stay away. <>/ExtGState<>/XObject<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 612 792] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>> The first set of logo ideas were terrific. For harmonic mitigation, K-rated transformers can be combined with harmonic filters or chokes. Regulators get few answers from Duke about substation attacks, Attacks on substations in four states raise alarm, Duke Energy commissions Floridas first solar power plant, Duke Energy Florida builds state-of-the-art substation, Duke Energy awards $40k to RCCs substation program, Duke Energy prepares rapid response to tropical storm Elsa, Duke Energy plans to triple renewable energy production this decade, Duke Energy Uses 3-D Scanning in a Substation, Duke Energy building new transmission project in central Florida, Duke Energy to invest $36B on power projects by 2026, North Carolina to receive $13B electric grid boost, Duke Energy donates transformer to college electric program, Consumer office to propose rejection of Duke Energys $1.9 billion grid upgrade, Duke Energy plans $1.9 billion modernisation of electric grid, Failure of transformer banks at Duke Energy substation causes outage, www.transformers-magazine/privacy-policy/, www.transformers-magazine/cookies-policy/. All windings should be checked for continuity. hkO0ibv*JmG[$ hbbd```b``{"@$$)fO8,f`v/~, lb{ 6_DrGH 8Xqf$]v P(9Wl0 v 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. When rollers are used on transformers without a structural base, you should use skids to distribute the stress over the base. Contact Duke Energy to request a representative to make evaluations of your request. Transformers are located either outdoors or inside buildings in an electrical room or other areas as permitted by code. To simplify installation, you should request from the manufacturer a simplified outline drawing of the transformer. Our interactions and communication throughout our project were flawless. However, a specially designed unit may have specific load capabilities not indicated on the nameplate. hbbd```b``z"H-dfH`?dirdl"?$L@{b`Ig` / Electrical Service Requirements (ESR) Current as of October 28, 2022 The ESR Manual provides guidance and instructions pertaining to electrical service connections. Some applications require a reduced sound level, such as a large unit in a commercial building with people working close to it. For example, trees can grow into the electrical equipment or fall across power lines, causing outages. Dry-type transformers have sound levels that are somewhat higher. Web10-Clearances o 10.06-01 Minimum Guy Clearances 11-Metering Many of the standards in the following subsections are applicable: o 11.01 Self-Contained Metering General o 11.09 Transformer-Rated Metering, Primary, Three-Phase o 11.11 Transformer-Rated Metering, Primary, Three-Phase - UG DEP UG Distribution Standards Cast-coil transformers are constructed with the primary and secondary windings encapsulated in reinforced resin. You should ground the transformer as per NEC Sec. If you see a downed line, immediately contact Duke Energy. fzVAm_mRJ}GoE>Mb-LBo^8p:>db[[wRI)9:K^>P[A$K)-Jc]!AwDI3rJ7aZVv0%DYxX^{{iQ]7-n%3wvg=yr 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. Occasionally, the installation of some method of sound abatement will be called for. Units lifted from the top core clamps will sometimes require that the top cover or part of the cover be removed. endstream endobj 53 0 obj <>/Metadata 20 0 R/OpenAction 54 0 R/PageLayout/OneColumn/Pages 50 0 R/StructTreeRoot 32 0 R/Type/Catalog/ViewerPreferences<>>> endobj 54 0 obj <> endobj 55 0 obj <>/Font<>/ProcSet[/PDF/Text/ImageC]/XObject<>>>/Rotate 0/StructParents 0/Tabs/S/Type/Page>> endobj 56 0 obj <>stream When an act of God (such as lightning, ice storms, high winds, hurricanes, tornadoes) or other natural events cause trees or other vegetation to fall across power lines and damage facilities, we cut the trees and brush so poles and lines can be replaced and re-energized. WebThe Duke Energy Renewables Facility this position would report to is located in Mercedes, Texas. Envelope Design.. 24 business hours turnaround time on initial logo designs, Unlimited revisions until you are 100% satisfied with the designs, Dedicated team of logo designer for each order, Unsurpassed quality at an unbeatable price, 4design concepts in first set of logo design. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc. When received, a transformer should be inspected for damage during shipment. A careful examination should be made to ensure that all electrical connections have been properly carried out and that the correct ratio exists between the low and high-voltage windings. Before working on the connections make sure all safety precautions have been taken. Typically, the property owner should make the request. How do I request tree trimming or tree removal by Duke Energy? A number of manufacturers require that insulation resistance testing be successfully completed prior to the transformer being placed in service for the warranty to be valid. 2 0 obj We will definitely work with them in the future, and recommend them to anyone who is serious about having quality work done for business. A point of contact will be provided should you have questions or concerns about the upcoming vegetation work. A general approach to determining transformer capacity and selecting the proper rating for the design application is to obtain the calculated design load from the respective electrical schedule and add 20% spare capacity for future load growth to be shown in the equipment schedule, unless otherwise directed by the facility based on design parameters. Pruning trees around power lines should only be attempted by qualified professionals. 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. You CANNOT go wrong by choosing them! Duke Energy Carolinas Distribution Construction Standards Reference Guide The Duke Energy Carolinas Distribution Construction Standards consist of the following documents available on This article will continue in subsequent issues of EC&M. If the load-side voltage is high, tap connections above 100% of line voltage must be used to lower the load voltage. Roles and Responsibilities Associated with Clearances, 1 of 8 Both the voltages and currents should change in a similar fashion. There are NEMA standards for transformer sound and depending upon the kVA rating of a unit, the sound it produces must be under a certain decibel level. endobj It does not store any personal data. We offer a truly unbelievable service for the price to help you get a great start or revamp your business. 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. createlogodesign provided very impressive artwork for our projects and does so in a very timely, efficient manner. If an imminent threat to Duke Energy power lines exists, we prioritize and schedule the work based on the severity of the situation. As stated in the Occupational Safety and Health Authority (OSHA) standards and ANSI Z133, an unqualified person should not work within 10 feet of overhead power lines with voltages below 50,000 volts. The cookie is used to store the user consent for the cookies in the category "Analytics". Before energizing the unit, it's very important that you alert all personnel installing the transformer that lethal voltages will be present inside the transformer enclosure as well as at all connection points. In addition, there are other specific requirements based on the transformer type, such as weatherproof enclosures for dry-type transformers installed outdoors or a transformer vault room for oil-insulated transformers installed indoors. I have received many compliments on the work which has been undertaken thus far and have no hesitation in recommending CreateLogoDesign.com to friends and colleagues and will continue to do so. Are you sure you want to delete your template? Exception: Meter socket and current North America | April 5, 2018. All rights reserved. We do UNLIMITED REVISIONS until you are 110% satisfied with your logo. xr]U)\8R.Uj;7YU`Kb%%R1C$31WKG~{j2vS}[jtG^_GDo//H$$nwyFwhiDxEMtlf\2*2$:"_]@-X.N)C5Y&`OQDd$7(m\0"z,QJ2 >>}Mz"8u!M k*)["o?\59+7>jy@:5iVwD"AS They supply the required incoming electrical service to the buildings. Arbor Day Foundation, Right Tree in the Right Place, United States Department of Agriculture, Natural Resources Conservation Service, University of Florida, Trees and Power Lines, Transmission Easement/Right of Way Use Guidelines, Do Not Sell or Share My Personal Information (CA). This does not apply to bottom ventilation openings. Also, when aluminum conductors are used, give them a protective compound treatment at the terminal as specified by the cable manufacturer. The most common building industry standard ratings are 3, 6, 9, 15, 30, 37.5, 45, 75, 112.5, 150, 225, 300, 500, 750, and 1,000 kVA. We understand how critical a logo is to the success of your business. Otherwise, they can be installed on open walls or steel columns or above suspended ceilings. driveways clearance with limited building heights Public roads and commercial driveways (except State Highways and Interstates Railroad electrified) * Supply service drops This website uses cookies to improve your experience while you navigate through the website. https://www.facebook.com/ElectricalConstructionMaintenanceMagazine, https://www.linkedin.com/company/electrical-construction-maintenance/. endstream endobj startxref clearances, it is the responsibility of the builder or owner to notify PECO Energy and make arrangements to achieve proper clearances or barriers. A right of way is a type of easement or agreement that grants a utility the right to use, access or transit a piece of property. Thanks! I have found the after sales service to be as professional as the original work, nothing being too much trouble to ensure that the customer is completely satisfied. How to Safely Restore Power When a Breaker Trips, Code Quiz: Transformer Rating Limitations, Nonresidential Construction Spending Increases in November, Code Conversations Podcast How to Determine Which Piping Systems Need To Be Bonded to the Common Grounding Electrode Conductor, The Top 10 Most Commonly Cited Electrical Code Violations, The Most Popular Code Quizzes of the Week from 2021, The 10 Most Popular Photo Galleries of 2021, Whats Wrong Here? This article presents several useful design concepts for selecting and sizing transformers in the design of electrical systems for commercial buildings. Sealed dry-type transformers are similar to dry type in most of their characteristics. ; 4 Final files will be provided in any format. This type is the most common to be used in the building indoor electrical system distribution. Is Duke Energy responsible for cleanup after trimming trees or weather events? ; 2 Unlimited revisions. For new buildings, you should work with the structural engineers so that the transformer's placement is included in the building plans. This may include personalization of content and ads, and traffic analytics. You should use commercially available, properly sized, UL-listed mechanical- or compression-type lugs. Never touch or try to drive over a downed power line. They contain an enclosure surrounding the windings for their mechanical protection and the safety of personnel. Aerial maintenance applications can be completed much more quickly than manual spraying, reducing crew exposure to physical hazards in the right-of-way environment. In non-landscaped sites, pruned vegetation and wood are left in place to biodegrade. These cookies track visitors across websites and collect information to provide customized ads. Information on minimum wire bending space clearances at terminals for conductors is found in NEC Sec. (3) Subway-LB transformer (see Table 8 on Page 7). If any PECO Energy Employee The Duke Energy Progress (DEP) Distribution Construction Standards are available on the My Duke Energy Contractor Portal. Then, without connecting the load, energize the transformer. 820 0 obj <> endobj You should note, though, that transformers serving large harmonic loads can produce a higher audible noise. See Table 1 for typical dry-type transformer ratings, dimensions, and weights. We employ lateral and directional pruning methods endorsed by tree care professionals. Southern California Edison, Disclosure of Non-Public Transmission Function Information, SCE Affiliates that Employ or Retain Marketing Function Employees, Job Titles and Description of SCE's Transmission Function Employees, Voluntary Consent to Share Non-Public Transmission Customer Information, Discretion Exercised Under Terms of Tariff, Discounts Offered For Transmission Service, Santa Catalina Island Gas & Water Tariffs, Santa Catalina Island Gas & Water Filed Forms, Notice of Release of Customer Information to Affiliates, Supply / Capacity / Services / Info Offered to Affiliates, Non-Customer Specific, Non-Public Information Offered to Affiliates, Annual Low Income Energy Efficiency Reports, 2009-11 Local Government Partnership Abstract Responses, Transmission Maintenance and Compliance Review (TMCR), Methodology of Creating the Static Load Profiles, SCE Offers Fixed-Price Amendment to Renewable Projects, Electrical Service Requirements (ESR - PDF), Regulatory Information - SCE Distribution Manuals.
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