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. . If the unit is installed in a location it shares with other equipment such as motors, pumps, or compressors, the transformer hum will go unnoticed. hkO0ibv*JmG[$ Never touch or try to drive over a downed power line. No one should climb trees that are in the vicinity of power lines. What fantastic professionals to work with. This may include personalization of content and ads, and traffic analytics. The distance increases with voltage for all voltages equal to or higher than 50,000 volts. 0 For units with ratings above 500kVA to 2500kVA, a typical concrete base would be 8 ft by 9 ft and 10 in. Before specifying any additional tests, you should contact the manufacturer to find out what data it has accumulated from testing essentially duplicate units. I was so impressed with the finished result that I've asked them to undertake future work. Who can request trimming or removal of a tree? If these parameters are different, circulation current will exist in the circuit loop between these units. You may also hire a company to remove the debris or contact your local public works to see if they remove yard debris. You should consider this when planning the unit's installation. Compatible species are not targeted for herbicide application. When does Duke Energy obtain permission to trim or take down a tree? 4, on page 44, and when all enclosure hardware is tightened so panels do not vibrate. Serious injuries, and even fatalities, have occurred when unqualified individuals perform this type of work without the assistance of qualified professionals. Indoor transformers for nonlinear loads can be selected with a K rating, which allows the transformer to withstand nonlinear conditions in the electrical system. Electrical Service Requirements (ESR) Current as of October 28, 2022 The ESR Manual provides guidance and instructions pertaining to electrical service connections. Mounting the unit on a platform that has less mass than the transformer will make the platform serve as a sounding board, just like the body of a violin. 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. This type is the most common to be used in the building indoor electrical system distribution. 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. Personnel should be instructed that should any service work be required to the unit, the lines that power the transformer must be opened and appropriate safety locks and tags applied. When is tree trimming considered an emergency? Where do I find Duke Energy transmission structure numbers? This may call for compromises regarding the length of the conductors going to and/or from the transformer. Units lifted from the top core clamps will sometimes require that the top cover or part of the cover be removed. 300.2 METERED AND UNMETERED CONDUCTORS . We have worked with various logo designers, and they are the cream of the crop. 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. Trees are assessed on a case-by-case basis. They supply the required incoming electrical service to the buildings. 373-6, Deflection of Conductors, and referenced in Sec. <> I highly recommend that if you are looking for a graphic designer than createlogodesign is your first port of call. Caution is required when operating in parallel. To provide reliable service, Duke Energy must prune or remove trees along the power lines. Where can recorded transmission easement documents be found? 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. So confident am I in their workmanship and design skills that I will be coming back - and I am delighted with the results. Larger units will have provisions for lifting from the base frame or from clamps at the top of the core. It is obvious that CreateLogoDesign takes great pride in their work and rightly so. This was our second project and I knew exactly who I wanted to work with. Thanks! An article on how to choose a transformer based on the latter criteria appeared in the May '96 issue of EC&M. 2023 Endeavor Business Media, LLC. When selecting a tree or shrub to plant, it is just as important to consider what you plant as it is where you plant. The cookie is used to store the user consent for the cookies in the category "Analytics". 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/. WebRequirements 1) It shall be the contractor's responsibility to secure the Power Company's approval prior to applying for a permit. 0 0 Call, For additional information please visit our. stream 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). 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. "7>^P*#e;dEH?7"\']Ec5>\(zx94|aX7NRc6~l}(} In non-landscaped sites, pruned vegetation and wood are left in place to biodegrade. We attempt to notify individual customers in advance of trimming or taking down trees on their property by leaving detailed door hangers with contact information. However if you are not satisfied, we refund the entire amount you paid us - no questions asked. This cookie is set by GDPR Cookie Consent plugin. They can be installed outdoors or indoors. Locating a unit at the end of a long, narrow room, or in the corner of a room can cause a megaphone effect and amplify the transformer's sound. Necessary cookies are absolutely essential for the website to function properly. Hint: Duct Tape to the Rescue. Our Premiere Package includes all desirable "upgrades". Planned maintenance is prioritized by evaluating reliability data, field conditions and other specific information. You should not remove this coating from tap and line terminals. For harmonic mitigation, K-rated transformers can be combined with harmonic filters or chokes. Duke Energy Carolinas Distribution Construction Standards Reference Guide The Duke Energy Carolinas Distribution Construction Standards consist of the following documents available on You can have big-business results at a "business-on-a-budget" price! When testing a transformer for sound level, you should recognize that all transformers, when energized, produce an audible noise. h[oWcp :\_H84$p~U==$W9A{fzQ!wZkzjgybveni\+\-\z&w:%HE*:Er;cWc These cookies ensure basic functionalities and security features of the website, anonymously. In the past two years, two large projects in Miami Dade County have been built: the Florida International University football stadium and Miami International Airport South Terminal. 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. Sometimes, when testing is carried out at the manufacturer's plant, the manufacturer will also allow a purchaser or a representative, such as a consulting engineer, to witness the tests. The transformer is equal to or less than its rated kVA and rated voltage. Usually, lateral bracing and/or an extra solid anchorage will be required. ]]> Some equipment could have a different torque requirement than shown. It's important that you have an understanding of the manufacturer's warranty. Transformers are designed with provisions for lifting, jacking, and/or rolling. The ESR Manual provides guidance and instructions pertaining to electrical service connections. These cookies will be stored in your browser only with your consent. Foundations. A protective plating or compound that prevents surface oxidation on the aluminum terminals is usually applied at the factory. We are delighted with the end result, it looks incredibly professional. We do UNLIMITED REVISIONS until you are 110% satisfied with your logo. Only line clearance qualified personnel should perform tree work around or adjacent to power lines and electrical equipment. You CANNOT go wrong by choosing them! 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. 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 After installation, you should check the output voltage of the transformer. We really liked two of them, and asked him to amalgamate them. 1 A Minimum of 4 Original Drafts for your Logo. There are additional tests that may be applicable, depending upon how and where the transformer will be used. See my site logo at. The revisions were done quickly and to my specifications, and often I was provided multiple versions from which to select. Member Resources. Use of alternate means of fire protection must be approved by the local code enforcement authority. But be careful here: Before applying this voltage, check with the manufacturer's manuals. Exercise care during handling to prevent equipment damage and/or personnel injury. If this does not happen, de-energize the transformer and contact the manufacturer. While monitoring the voltages and currents, gradually increase the load in a stepped or gradual application until full load is reached. A note of caution: The information presented here is not meant to supersede any manufacturer's instructions. hkO0ibv*JmG[$ "7>^P*#e;dEH?7"\']Ec5>\(zx94|aX7NRc6~l}(} They gave us 6 logo ideas to start with. Necessary cookies are absolutely essential for the website to function properly. Transmission easement documents can be located in their respective countys deeds and records department. You also have the option to opt-out of these cookies. 450-12 on Terminal Wiring Space. Never attempt to check the output voltage at the transformer. %PDF-1.6 % It is good practice to regularly test this type of transformer in order to determine dielectric breakdown, which affects its useful life. endobj Our understanding of their general characteristics will allow the designer and end user to make the proper selection for the electrical system application. They were very attentive to our needs, very detailed with their work, and met the needs of our timetable. endstream endobj startxref https://www.facebook.com/ElectricalConstructionMaintenanceMagazine, https://www.linkedin.com/company/electrical-construction-maintenance/. Facility Connection Requirements . Also, with this information, it will be easier to plan site arrangements. If in doubt about clearances, do not hesitate to call the transformer manufacturer. 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. Energy Efficient Transformer require a minimum of 3`` clearance from ventilated openings. 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).