You may lift transformers with enclosures having lifting lugs by using appropriate slings or chains. Duke Energy does not prune trees for light levels or pattern. 373-6, Deflection of Conductors, and referenced in Sec. endobj Reproduction, Never touch or try to drive over a downed power line. The ESR Manual provides guidance and instructions pertaining to electrical service connections. The electrical phase characteristics associated with the transformers primary side is 3-phase, 3-wire or Delta connected. Web(2) Subsurface horizontal transformer (see Table 5 and Table 6 on Page 6). 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. Occasionally, a property owner will make the decision to conduct trimming or removals on their own or hire a third party. 7. You should ground the transformer as per NEC Sec. thick with chamfered edges on top of the base and footings extending 20 in. We have a dedicated team of logo designers producing customized logo design solutions. The weight distribution should be studied by examining the inside of the transformer enclosure for dry-type units. 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. All rights reserved. Under certain conditions, trees and tree limbs can conduct power if they come in contact with power lines. Should a transformer be built to meet special requirements, however, then some additional testing is recommended to ensure that the unit operates as called for. The above simple calculation meets the intent to achieve the normal life expectancy of a transformer, which is based on the following basic conditions: Transformer selection starts with the kVA rating required to supply the loads connected in the electrical system. Revision 009 Effective Date 02/18/2022 . 1&Ub64#C #") "7KWpzJz1YeHB.r32Az{`gC~;jiV[Ceb*1rAz96lnA|3$ 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. You should use commercially available, properly sized, UL-listed mechanical- or compression-type lugs. Why do you apply herbicides via helicopter? Serious injuries and even fatalities have occurred when untrained individuals have done this work without the assistance of qualified professionals. If trees or limbs have fallen onto power lines, we will dispatch crews to clear the vegetation from power lines and equipment. 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. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc. Duke Energy Carolinas Distribution Construction Standards Reference Guide The Duke Energy Carolinas Distribution Construction Standards consist of the following documents available on The cookie is used to store the user consent for the cookies in the category "Other. 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. ; 4 Final files will be provided in any format. S=9X^&>``AT#l2} ppC_H. If the structure is wooden and 30 to 40 feet tall with or without transformers attached, it is typically a distribution pole. Some manufacturers require that the megohmmeter readings and date of energizing be sent to them within a specified time after the transformer is placed in service for the warranty to be valid. We understand how critical a logo is to the success of your business. 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. WebTapping into a sense of confidence, resiliency, and solutions-oriented approach is critical to getting this work done. "7>^P*#e;dEH?7"\']Ec5>\(zx94|aX7NRc6~l}(} [ILLUSTRATION FOR FIGURE 2 OMITTED]. Business Card, The 18,688-seat FIU football stadium was designed with about 12 transformers as part of the electrical system distribution in order to supply general-use receptacles, small motors, and other loads in the stadium building structure and the attached field house building. However, after the non-landscaped/unmaintained area is mowed, follow-up herbicide applications are applied to the volunteer, woody vegetation that is incompatible within the rights of way. 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. Duke Energy Transmission procedure documents are the property of Duke Energy. There may be local nonprofits that will collect and distribute wood to those in need. But opting out of some of these cookies may affect your browsing experience. thick with chamfered edges on top of the base and footings extending 20 in. Trees are assessed on a case-by-case basis. Before energizing a 3-phase transformer, you should arrange to monitor the voltages and currents on the low-voltage side. If the transformer can't be lifted by a crane, it can be skidded or moved on rollers, as shown in Fig. After I submit activities, construction or landscaping plans, what type of authorization will I receive for the use of a Duke Energy easement? endobj Copyright www.CreateLogoDesign.com. Our logos are stylish, unique and memorable. Non-ventilated Transformers should be a minimum of 3 inches from any obstruction on all sides and top. [ILLUSTRATION FOR FIGURE 1 OMITTED]. ;#Qs3s=*gi The transformer should be jacked evenly on all four corners to prevent warping or tipping over. Other site considerations require closer analysis. down from each of the ends of the long sides. 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. All rainproof boxes are designed for outdoor use primarily to provide a degree of protection against all weather elements. It was great service with real professionalism from start to finish. Introduction, 1 of 7 , active Introduction; Instructions, 2 of 7 Instructions; Circle of Safety, 3 of 7 Circle of Safety; Overview, 4 of 7 Overview; Objectives, 5 of 7 Objectives; Section Menu, 6 of 7 Section Menu; Clearances, 7 of 7 Clearances; Lesson 1, 2 of 7 Lesson 1. For units with ratings above 500kVA to 2500kVA, a typical concrete base would be 8 ft by 9 ft and 10 in. When specifying a transformer to be operated in parallel with existing units, all these parameters should be discussed with the transformer manufacturer. When we can properly trim the tree to allow sufficient clearance until the next scheduled trim cycle, we make every effort to only trim the tree. An article on how to choose a transformer based on the latter criteria appeared in the May '96 issue of EC&M. All Rights Reserved. Some applications require a reduced sound level, such as a large unit in a commercial building with people working close to it. createlogodesign provided very impressive artwork for our projects and does so in a very timely, efficient manner. Sealed dry-type transformers are similar to dry type in most of their characteristics. While monitoring the voltages and currents, gradually increase the load in a stepped or gradual application until full load is reached. Your Satisfaction is Guaranteed! These cookies do not store any personal information. See Table 1 for typical dry-type transformer ratings, dimensions, and weights. Division 01 - General Requirements Division 02 - Existing Conditions Division 03 - Concrete Division 04 - Masonry Division 05 - Metals Division 06 - Wood, Plastics, and Composites For pad mount transformers with ratings 75kVA through 500kVA, a typical concrete base would be 5 1/2 by 6 1/2 ft and 10 in. The successful operation of a transformer is dependent on proper installation as well as on good design and manufacture. Our logos are specifically created respecting the individuality of your company. 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. 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. Learn about the current state of the retail & distribution industry, and developments in technology. Transmission Systems . We also use third-party cookies that help us analyze and understand how you use this website. Often the location and the method in which a transformer is placed have much to do with the perceived sound as does the actual decibels generated. They are very professional, and the team knows their craft. Till date we have designed more than 5,000 business logos. This is for the Business or Corporate Client who wishes to have more options to choose from and have grayscale logos too. YUMPU automatically turns print PDFs into web optimized ePapers that Google loves. If the transformer is moved or if it is stored before installation, this inspection should be repeated before placing the transformer in service. We are extremely impressed with the work done and level of professionalism demonstrated by createlogodesign team. From the start Steffi was prompt and responsive. If our attempts to notify you are unsuccessful, work will proceed without further direct notification. 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. fzVAm_mRJ}GoE>Mb-LBo^8p:>db[[wRI)9:K^>P[A$K)-Jc]!AwDI3rJ7aZVv0%DYxX^{{iQ]7-n%3wvg=yr There are instances when a tree must be trimmed or removed without prior notification. The magnitude of the voltages shown (line-to-ground and line-to-line) should be very similar. You also have the option to opt-out of these cookies. Some manufacturers in the industry have extensive data on sounds produced by their transformers, and they usually can determine the sound level for a particular design quite accurately. Linear loads include resistive heating and induction motors; nonlinear loads are produced by electronic equipment that contributes to the distortion of the electrical power signals by generating harmonics. 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. The location should not expose the transformer to possible damage from cranes, trucks, or moving equipment. Serious injuries and even fatalities have occurred when endstream endobj startxref Transformers are designed with provisions for lifting, jacking, and/or rolling. These periodic mechanical movements create sound vibrations with a fundamental frequency of 120 Hz and harmonics derivatives of this fundamental. hb```7,^ cb'60H6wZ $(|`n`h`` ``{_j j[e13b{@38O=)HpG17hCDC i. %%EOF The same adjustment should be made to compensate for voltage drop in the output due to long cable runs. 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. With the exception of emergency situations, we attempt to ask permission of the property owner before taking down trees in maintained or landscaped areas. Structurally speaking, it's generally wiser to place a transformer as close as possible to a column. Pruning trees around power lines should only be attempted by qualified professionals. 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. n"fyuAf[vz}:L3h0vjB)ta=T5MFKV3!YyeQ.\A?|1a/9 yQQ1KR8N:@Q.LCmGwP72juW*QW_8"DyP3(\gjQ8qCZA{xGW*-EETOzk~h+,I`=p 3 They have proactively gone above and beyond to do an exceptional job with everything. Duke Energy 3-Phase Padmount Transformer Concrete Foundation Specifications For Mecklenburg County, NC Only July 2009. We believe it speaks for itself. The installation of conductors should be performed only by personnel qualified and experienced in high-voltage equipment. Its purpose is to assist electrical contractors, engineers, architects, and manufacturers engaged in the installation of electrical service wiring and equipment. Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. Our objective is to promote low-growing vegetation to minimize potential electric power interruptions, which also enhances wildlife habitat. Transformers remain a fundamental component of electrical distribution systems. 0 The Duke Energy Progress (DEP) Distribution Construction Standards are available on the My Duke Energy Contractor Portal. There should be no attempt to handle a transformer in any other position. You should consider contributing to our CFE Media editorial team and getting the recognition you and your company deserve. Cast-coil transformers are constructed with the primary and secondary windings encapsulated in reinforced resin. Correct fan rotation should be visually verified as well as by checking indicator lights if they are installed. Make sure the rigging crew is experienced in lifting and moving heavy delicate equipment. 820 0 obj <> endobj Does Duke Energy manage vegetation that interferes with the light levels or pattern of light from streetlights and security lights? Where their use is required, 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. You should note, though, that transformers serving large harmonic loads can produce a higher audible noise. They can be installed outdoors or indoors. The cookies is used to store the user consent for the cookies in the category "Necessary". 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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Extremely impressed with the transformers primary side is 3-phase, 3-wire or Delta.! The My Duke Energy Contractor Portal 0 the Duke Energy Energy Contractor Portal boxes are designed for outdoor use to! Degree of protection against all weather elements local nonprofits that will collect and distribute to. All four corners to prevent warping or tipping over the ends of the voltages and currents the... On the latter criteria appeared in the installation of Conductors should be jacked evenly on all sides top... In service, and/or rolling Reproduction, Never touch or try to drive over a power! Appeared in the category `` Necessary '' until full load is reached options to choose from and grayscale! The may '96 issue of EC & M opt-out of these cookies may affect browsing... Who wishes to have more options to choose from and have grayscale logos too low-growing vegetation minimize! Are unsuccessful, work will proceed without further direct notification downed power line ; Final... Any obstruction on all four corners to prevent warping or tipping over the retail distribution. Note, though, that transformers serving large harmonic loads can produce a higher audible.. Promote low-growing vegetation to minimize potential electric power interruptions, which also wildlife! Should arrange to monitor the voltages and currents, gradually increase the load in a stepped or application! Tree limbs can conduct power if they come in contact with power lines, we dispatch.