Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. Never attempt to check the output voltage at the transformer. <>/ExtGState<>/XObject<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 612 792] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>> 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 When does Duke Energy obtain permission to trim or take down a tree? Transformers change voltage levels to supply electrical loads with the voltages they require. WebPer 450.27 of the NEC; Combustible material, combustible buildings, and parts of buildings, fire escapes, and door and window openings shall be safeguarded from fires originating in oil-insulated transformers installed on roofs, attached to or adjacent to a building or combustible material. 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. it windows (first story) 10 10 Here, a transformer turns ratio indicator should be used to measure the ratio. If you are looking for someone who are able to produce EXACTLY what you want, this is the place to go with. Line side (unmetered) and load side (metered) conductors shall not occupy the same raceway or enclosure. See Table 1 for typical dry-type transformer ratings, dimensions, and weights. 450-12 on Terminal Wiring Space. A check sheet should be used to record all items, and verification should be made that these items have been properly accounted for upon completion of work. We are delighted with the end result, it looks incredibly professional. ;w]S9 V?O|H?&V+f[^ c#7b0#M>*. Does Duke Energy use herbicides to control vegetation in rights of way? When speaking to consulting engineers on this topic, we've found that they recommend the cable be sized for the transformer's nameplate rating. endstream endobj 2044 0 obj <>>>/Pages 2032 0 R/StructTreeRoot 707 0 R/Type/Catalog>> endobj 2045 0 obj <>/Font<>/ProcSet[/PDF/Text/ImageC]/XObject<>>>/Rotate 0/StructParents 0/Type/Page>> endobj 2046 0 obj <>stream It's recommended that all conducted tests comply with applicable ANSI/IEEE and NEMA standards. 1 A Minimum of 4 Original Drafts for your Logo. This website uses cookies to improve your experience while you navigate through the website. All Rights Reserved. However, anyone is encouraged to report unsafe conditions. However, for low-voltage (600V and below) transformers, this is not practical. Transformers should be maintained in an upright position when being moved. We understand how critical a logo is to the success of your business. Retail & Schools Depending upon the size and load requirements of the facility, the large majority of schools (except for some very large universities) and retail facilities are served by [ILLUSTRATION FOR FIGURE 1 OMITTED]. ;#Qs3s=*gi If the transformer is moved or if it is stored before installation, this inspection should be repeated before placing the transformer in service. We do not round trees over because it contributes to poor tree health. Jana Ganion, Sustainability and Government Affairs Director. You may also hire a company to remove the debris or contact your local public works to see if they remove yard debris. %PDF-1.7 % Larger units will have provisions for lifting from the base frame or from clamps at the top of the core. Box of 1 Unit Trade Account Log In Log In to view price Specifications Products specifications Click Here to see our Portfolio. The difference is they contain an enclosed tank with nitrogen or other dielectric gas to protect the windings. 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. 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. Indoor transformers for nonlinear loads can be selected with a K rating, which allows the transformer to withstand nonlinear conditions in the electrical system. ; 4 Final files will be provided in any format. Pruning trees around power lines should only be attempted by qualified professionals. Before specifying any additional tests, you should contact the manufacturer to find out what data it has accumulated from testing essentially duplicate units. You CANNOT go wrong by choosing them! 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. Learn about the current state of the retail & distribution industry, and developments in technology. The magnitude of the voltages shown (line-to-ground and line-to-line) should be very similar. Structurally speaking, it's generally wiser to place a transformer as close as possible to a column. Duke Energy discourages customers from working around power lines and electrical equipment. Once the transformer has been located on its permanent site, a thorough final inspection should be made before any assembly is accomplished and the unit is energized. They have proactively gone above and beyond to do an exceptional job with everything. And, each manufacturer will have its own instructions for installing and testing its transformers. . Our programs objective is to minimize tree-related power outages in a manner that is consistent with good arboricultural practices. To provide reliable service, Duke Energy must prune or remove trees along the power lines. To simplify installation, you should request from the manufacturer a simplified outline drawing of the transformer. You should ground the transformer as per NEC Sec. All products used by Duke Energy are registered by the Environmental Protection Agency and approved by appropriate state agencies. 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. When the load-side voltage is low, tap connections below 100% of line voltage must be used to raise the load voltage. Do not install washers between the terminal lugs and the termination bus bar as this will introduce an added impedance and will cause heating and possible connection failure. All rainproof boxes are designed for outdoor use primarily to provide a degree of protection against all weather elements. Planned maintenance is prioritized by evaluating reliability data, field conditions and other specific information. Tree placement in relation to overhead power lines is critical in order to preserve the natural size, shape and overall integrity of the tree and protect the intent for which it was planted. Are you sure you want to delete your template? Your file is uploaded and ready to be published. Before working on the connections make sure all safety precautions have been taken. If this is not the case, deenergize the transformer and contact the manufacturer before proceeding further. Analytical cookies are used to understand how visitors interact with the website. With the exception of emergency situations, we attempt to ask permission of the property owner before taking down trees in maintained or landscaped areas. Cast-coil transformers are constructed with the primary and secondary windings encapsulated in reinforced resin. Can tree species that are compatible with a distribution line right of way be removed during routine maintenance? 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. When specifying a transformer to be operated in parallel with existing units, all these parameters should be discussed with the transformer manufacturer. more than ten (10) 600 MCM or smaller conductors per phase, or more than eight (8) Disposal of any wood, limbs or debris resulting from this type of emergency operation is the responsibility of the property owner. The usual sound levels for liquid-filled transformers range from 40 dB to 60 dB for units below 500kVA, about 65 dB for units between 4000kVA to 5000kVA, 73 dB for transformers with ratings between 6000kVA to 7500kVA, and 76 dB for units between 8000kVA and 10,000kVA. Where their use is required, Webrequirements. This was our second project and I knew exactly who I wanted to work with. Serious injuries and even fatalities have occurred when untrained individuals have done this work without the assistance of qualified professionals. You take your choice; extra safety and extra cost or regular-sized cables. Who can request trimming or removal of a tree? This rating provides the associated power output delivered for a specific period by the loads connected to the transformer on the secondary side of the equipment. Our prices are low as compared to that offered by our competitors, as we understand that small business may have limited budgets, but we believe that even they should have the opportunity to get a professionally designed logo which meets their budget. Caution is required when operating in parallel. What alternatives are there to remove wood after vegetation maintenance has occurred? We do UNLIMITED REVISIONS until you are 110% satisfied with your logo. 820 0 obj <> endobj Functional cookies help to perform certain functionalities like sharing the content of the website on social media platforms, collect feedbacks, and other third-party features. What can I do in a transmission right of way? 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. Information on minimum wire bending space clearances at terminals for conductors is found in NEC Sec. %PDF-1.5 An easement is typically granted by property owners to an electric utility for the purpose of constructing and maintaining power lines and other equipment. The first set of logo ideas were terrific. Both projects included dry-type 480 V, 3-phase to 208 Y/120V V step-down transformers (in NEMA 2 enclosures), ranging from 15 kVA to 112.5 kVA in the electrical system distribution design. Division 01 - General Requirements Division 02 - Existing Conditions Division 03 - Concrete Division 04 - Masonry Division 05 - Metals Division 06 - Wood, Plastics, and Composites With Duke Energys Builder Portal, you have the tools you need to get it done, right at your fingertips. We have helped many businesses establish corporate identity - be it logos, brochures, business cards, letterheads, envelopes, banners, illustrations etc. When is tree trimming considered an emergency? These periodic mechanical movements create sound vibrations with a fundamental frequency of 120 Hz and harmonics derivatives of this fundamental. What happens when trees come into contact with power lines? Serious injuries and even fatalities have occurred when Transformers are designed with provisions for lifting, jacking, and/or rolling. "7>^P*#e;dEH?7"\']Ec5>\(zx94|aX7NRc6~l}(} Reproduction, 2043 0 obj <> endobj Before your transformer is scheduled to be shipped to its designated site, it's important that you coordinate with the manufacturer what acceptance tests should be carried out. For example, if the transformer is installed in a quiet hallway, a definite hum will be noticed. WebRequirements 1) It shall be the contractor's responsibility to secure the Power Company's approval prior to applying for a permit. The majority of our pruning and cutting occurs during planned maintenance. Dangerous high voltage will be present within the transformer enclosure. From the start Steffi was prompt and responsive. We use professional contractors to apply herbicide by utilizing different methods including foliar, stump, stem and vine applications. Under certain conditions, trees and tree limbs can conduct power if they come in contact with power lines. When a Customer does his own wiring, he will be considered the electrical contractor for the purpose of these requirements. Why are you trimming or cutting down my trees? 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. If you see a downed line, immediately contact Duke Energy. K-rated transformers do not mitigate or eliminate harmonics. This cookie is set by GDPR Cookie Consent plugin. Some microprocessor-based electronic devices may not be able to withstand the voltage. The ESR Manual provides guidance and instructions pertaining to electrical service connections. Watch Jana's Story. I found createlogodesign.com by searching the internet, and decided to try them out without a first hand referral. 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. Facility Connection Requirements . Do you have experience and expertise with the topics mentioned in this content? Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors. *[L EgptA80~@GI#Q@hxMGPhMgoQ ] $ k. This cookie is set by GDPR Cookie Consent plugin. Before a power line is built, Duke Energy acquires easements from property owners along the selected route. However, their operating principles will remain with the same. What is the time frame expected for the completion of customer-requested tree trimming? Torque specifications are sometimes listed on the hardware. By studying the overall mounting and terminal dimensions, it's possible to plan the installation with an orderly arrangement of connections. Never touch or try to drive over a downed power line. Note: Due to the large size of this document (approximately 20 MB), downloading or printing may take several minutes, depending on the speed of your modem and printer capabilities. endstream endobj startxref Clearance Rules for Distribution , 4 of 10 Clearance Rules for Distribution ; Clearance Rules for Distribution , 5 of 10 Clearance Rules for Distribution ; Clearance Requirements, 6 of 10 Occasionally, a property owner will make the decision to conduct trimming or removals on their own or hire a third party. Access to the Contractor Portal requires username and Some equipment could have a different torque requirement than shown. Duke Energy does not prune trees for light levels or pattern. To get your Company Logo developed by our experienced Logo Designers, please fill out our Order Form. 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. Selecting Transformer selection starts with the kVA rating required to supply the loads connected in the electrical system. They contain an enclosure surrounding the windings for their mechanical protection and the safety of personnel. 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. In addition, a good design and installation require the proper transformer feeder and overcurrent protection device size based on NEC articles 240, 250, 450, and applicable sections of Article 310 (Figure 2). Small transformers, arguable those below 400kVA, usually don't have extensive testing as they are often installed far downstream in a power system; as such, their importance is not as vital as compared with larger units. B. Three-Phase: The standard transformer for three-phase service is Style MTP, Style IIE-LB, or Style IIG pad-mount transformer (see Table 12 through Table 19 on Pages 8 through 10). Great service. 847 0 obj <>stream The location of a transformer relates directly to how noticeable its sound level appears. We also depend on help from the public. Can I replace a tree that has been cut down? The installation of conductors should be performed only by personnel qualified and experienced in high-voltage equipment. Duke Energy schedules periodic vegetation maintenance along power lines to minimize outages caused by trees in or near transmission and distribution rights of way. What fantastic professionals to work with. When transformers are installed for parallel operation, their rated voltages, impedances, and turn ratios ideally should be the same and their phasor relationships identical. 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Use professional contractors to apply herbicide by utilizing different methods including foliar, stump, stem and applications. ) it shall be the contractor 's responsibility to secure the power Company 's approval to... Your local public works to see our Portfolio sure you want to delete your template to how noticeable sound! During routine maintenance ) conductors shall not occupy the same can I do in a quiet hallway, a hum. You see a downed line, immediately contact Duke Energy does not prune trees for levels. Want, this is the place to go with high voltage will be considered the contractor. Downed power line to a column line-to-line ) should be consulted for on... Are there to remove wood after vegetation maintenance along power lines in in! Esr Manual provides guidance and instructions pertaining to electrical service connections not occupy the same qualified experienced! Cast-Coil transformers are designed with provisions for lifting from the base frame from! 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