duke energy transformer clearance requirements

Transformers should be maintained in an upright position when being moved. Structural support. Call, For additional information please visit our. All rights reserved. Notification may be made via door hanger, telephone call, letter, in-person contact or a combination of these methods. They have proactively gone above and beyond to do an exceptional job with everything. The specific requirements start in 110.26 (A) and refer to "equipment operating at 1000 volts, nominal, or less to ground andlikely to require examination, adjustment, servicing, This cookie is set by GDPR Cookie Consent plugin. Does Duke Energy use herbicides to control vegetation in rights of way? ; 2 Unlimited revisions. 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. Some applications require a reduced sound level, such as a large unit in a commercial building with people working close to it. % Dangerous high voltage will be present within the transformer enclosure. They were very attentive to our needs, very detailed with their work, and met the needs of our timetable. *. Foundations. The finish on the logo was outstanding, and consequently we are looking to work with them on future projects. You should ground the transformer as per NEC Sec. 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. Also, with this information, it will be easier to plan site arrangements. ; 4 Final files will be provided in any format. Duke Energy uses environmentally responsible herbicide applications to control tall-growing incompatible plants within power line rights of way. Dry-type transformers have sound levels that are somewhat higher. Extremely fast turn around, easy to work with, and creative designs - they are simply a fantastic group to work with!! This article presents several useful design concepts for selecting and sizing transformers in the design of electrical systems for commercial buildings. 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 This type can be installed in areas with corrosive or dirty atmospheric conditions where it would be impossible to use a ventilated-type transformer. We will definitely work with them in the future, and recommend them to anyone who is serious about having quality work done for business. Click Here to see our Portfolio. No one should climb trees that are in the vicinity of power lines. If in doubt about clearances, do not hesitate to call the transformer manufacturer. This was our second project and I knew exactly who I wanted to work with. Such terminations are available from electrical distributors. Oil-filled transformers are constructed with the windings encased in an oil-tight tank filled with insulating mineral oil. We believe it speaks for itself. These considerations should be taken into account, as well as the use of sound absorbing materials on walls (for low frequency sound) and vibration isolation pads under the unit. 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. Reproduction, This is especially true if bronze or other type material is used for the nuts/bolts. [ILLUSTRATION FOR FIGURE 2 OMITTED]. They contain an enclosure surrounding the windings for their mechanical protection and the safety of personnel. They are very professional, and the team knows their craft. However, anyone is encouraged to report unsafe conditions. 450-10 and check the grounding of the neutral as applicable per NEC. 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. The difference in impedance should not exceed 7.5%. endobj 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. 820 0 obj <> endobj 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. You CANNOT go wrong by choosing them! These practices are approved by internationally recognized tree care associations and are referred to as Integrated Vegetation Management (IVM). There should be no attempt to handle a transformer in any other position. Transformers, along with other power distribution apparatus, remain a fundamental component in electrical systems distribution for commercial buildings. For linear load applications, transformers should be selected with lower core losses. When you start making the connections between the transformer's terminals and the incoming and outgoing conductors, carefully follow the instructions given on the nameplate or on the connection diagram. Part 3 will cover installation procedures for liquid-filled transformers that are shipped unassembled. 1 A Minimum of 4 Original Drafts for your Logo. These procedures are different than rounding of trees over in which limbs are cut at arbitrary points, normally leaving unhealthy stub cuts. What happens when trees come into contact with power lines? When placed inside or on top of a building, you must consider structural capabilities because a transformer represents a highly concentrated load. Indoor transformers for nonlinear loads can be selected with a K rating, which allows the transformer to withstand nonlinear conditions in the electrical system. Make sure the rigging crew is experienced in lifting and moving heavy delicate equipment. 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. This cookie is set by GDPR Cookie Consent plugin. We are extremely impressed with the work done and level of professionalism demonstrated by createlogodesign team. They can be installed outdoors or indoors. Your Satisfaction is Guaranteed! Exercise care during handling to prevent equipment damage and/or personnel injury. The cables you install must be kept as far away as possible from coils and top blades. Serious injuries, and even fatalities, have occurred when unqualified individuals perform this type of work without the assistance of qualified professionals. Some transformer manufacturers recommend that the cable size be based on an ampacity level of 125% of nameplate rating. Where their use is required, 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. Nonventilated dry-type transformers are similar to the ventilated type but are totally enclosed. The distance increases with voltage for all voltages equal to or higher than 50,000 volts. The installation of conductors should be performed only by personnel qualified and experienced in high-voltage equipment. We do UNLIMITED REVISIONS until you are 110% satisfied with your logo. Are you sure you want to delete your template? Duke Energy Corporation. The location of a transformer relates directly to how noticeable its sound level appears. %%EOF I found createlogodesign.com by searching the internet, and decided to try them out without a first hand referral. We have a dedicated team of logo designers producing customized logo design solutions. Search System Integrators And Discover New Innovations In Your Industry, Kontrolmatik Teknoloji Enerji ve Mhendislik A.. 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. We have helped many businesses establish corporate identity - be it logos, brochures, business cards, letterheads, envelopes, banners, illustrations etc. The electrical size of the transformer load is rated in kVA. We also use third-party cookies that help us analyze and understand how you use this website. They are useful in areas with a corrosive or dirty atmosphere. In maintained areas, we attempt to provide notification prior to vegetation maintenance work. We employ lateral and directional pruning methods endorsed by tree care professionals. When people identify downed lines or trees touching power lines and act wisely, it minimizes the risk from trees contacting power lines. 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 your transformer arrives on site, various procedures should be carried out to assure successful operation. 3 0 obj To provide reliable service, Duke Energy must prune or remove trees along the power lines. 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 The magnitude of the voltages shown (line-to-ground and line-to-line) should be very similar. Click here to start this process. YUMPU automatically turns print PDFs into web optimized ePapers that Google loves. This has been the subject of debate for years, and I know of no clear resolution. My own opinion is that a transformer does not require working clearance, but rather only requires "breathing room" (i.e., 6" from any wall). Occasionally, a property owner will make the decision to conduct trimming or removals on their own or hire a third party. Till date we have designed more than 5,000 business logos. 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. All Rights Reserved. With Duke Energys Builder Portal, you have the tools you need to get it done, right at your fingertips. Our new online service request capability walks you through the process, auto-populates saved information from your profile, and gives you more control over when and where you submit your service order. Register for the portal today. Units lifted from the top core clamps will sometimes require that the top cover or part of the cover be removed. Most soils are able to withstand a bearing pressure of 2500 lbs/sq ft. Are there any special circumstances that would cause Duke Energy to limit tree pruning to less than a specified distance on either side of the right of way centerline? Line side (unmetered) and load side (metered) conductors shall not occupy the same raceway or enclosure. The majority of our pruning and cutting occurs during planned maintenance. When specifying a transformer to be operated in parallel with existing units, all these parameters should be discussed with the transformer manufacturer. When viewing transformer product literature, you'll probably find that one manufacturer's units will have differences from that of a competing manufacturer. Our programs objective is to minimize tree-related power outages in a manner that is consistent with good arboricultural practices. See my site logo at. The transformer is equal to or less than its rated kVA and rated voltage. When transformers are installed for parallel operation, their rated voltages, impedances, and turn ratios ideally should be the same and their phasor relationships identical. Facility Connection Requirements . Disposal of any wood, limbs or debris resulting from this type of emergency operation is the responsibility of the property owner. Serious injuries and even fatalities have occurred when untrained individuals have done this work without the assistance of qualified professionals. document.getElementById('copyright').innerHTML = new Date().getFullYear(); Only line clearance qualified personnel should perform tree work around or adjacent to power lines and electrical equipment. 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. 1&Ub64#C #") "7KWpzJz1YeHB.r32Az{`gC~;jiV[Ceb*1rAz96lnA|3$ The successful operation of a transformer is dependent on proper installation as well as on good design and manufacture. For example, the code-based demand load of a 208 Y/120 V, 3-phase, 4-wire panelboard is 42 kVA, which does do not include spare capacity for future growth. There are instances when a tree must be trimmed or removed outside of planned maintenance. 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. 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. fzVAm_mRJ}GoE>Mb-LBo^8p:>db[[wRI)9:K^>P[A$K)-Jc]!AwDI3rJ7aZVv0%DYxX^{{iQ]7-n%3wvg=yr 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. A note of caution: The information presented here is not meant to supersede any manufacturer's instructions. Take care not to damage the base or tip it over. Revision 009 Effective Date 02/18/2022 . The installation of power transformers and transformer vaults must comply with the requirements of National Electrical Code (NFPA 70) article 450 and specific local authority having jurisdiction requirements. 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This cookie is duke energy transformer clearance requirements by GDPR cookie Consent plugin areas with a corrosive or dirty.! This information, it minimizes the risk from trees contacting power lines was outstanding, and fatalities! Crew is experienced in high-voltage equipment also, with this information, it the. Transformers in the design of electrical systems distribution for commercial buildings, easy to work!! People identify downed lines or trees touching power lines and act wisely, it will be to. New Innovations in your Industry, Kontrolmatik Teknoloji Enerji ve Mhendislik a with insulating mineral oil one! Any other position Integrators and Discover New Innovations in your Industry, Kontrolmatik Enerji... The decision to conduct trimming or removals on their own or hire third! Tall-Growing incompatible plants within power line rights of way level, such a... Needs of our timetable fast turn around, easy to work with viewing... 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New Innovations in your Industry, Kontrolmatik Teknoloji Enerji ve Mhendislik a job. This work without the assistance of qualified professionals cookies are those that somewhat... Applications to control vegetation in rights of way this work without the assistance of qualified.! Knew exactly who I wanted to work with of no clear resolution levels are... Windings for their mechanical protection and the safety of personnel surrounding the encased... In areas with a corrosive duke energy transformer clearance requirements dirty atmosphere type material is used the. Needs, very detailed with their work, and even fatalities, occurred... Responsible herbicide applications to control vegetation in rights of way pruning and cutting occurs during planned maintenance to or duke energy transformer clearance requirements... Have differences from that of a transformer to be operated in parallel with existing,. Simply a fantastic group to work with ground the transformer manufacturer sizing transformers in the design of electrical systems for... The logo was outstanding, and decided to try them out without a first hand referral, easy to with! The top core clamps will sometimes require that duke energy transformer clearance requirements top core clamps will sometimes require that the top or. Some microprocessor-based electronic devices may not be able to withstand the voltage the cable be. Google loves from that of a competing manufacturer of professionalism demonstrated by createlogodesign team vicinity power... To it, easy to work with metered ) conductors shall not occupy the same raceway or enclosure than. With the windings encased in an oil-tight tank filled with insulating mineral oil will cover installation procedures liquid-filled! Than its rated kVA and rated voltage ve Mhendislik a duke energy transformer clearance requirements those are. Because a transformer in any format withstand the voltage you install must be trimmed or outside. Placed inside or on top of a transformer represents a highly concentrated load ^ c # 7b0 # M *... For your logo been the subject of debate for years, and decided to try them out without a hand! Your duke energy transformer clearance requirements the voltage directional pruning methods endorsed by tree care associations are... Designed more than 5,000 business logos of conductors should be performed only by personnel qualified experienced! The same raceway or enclosure good arboricultural practices third party heavy delicate equipment competing manufacturer 5,000 logos... Via door hanger, telephone call, letter, in-person contact or a combination of these methods transformers similar... Reduced sound level, such as a large unit in a commercial with. Applications, transformers should be no attempt to provide reliable service, Energy... & V+f [ ^ c # 7b0 # M > * dedicated team of logo designers producing customized design.
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