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. Clay soils are compressible and can cause problems that may require stabilizing back-fill. 2 0 obj They supply the required incoming electrical service to the buildings. We offer a truly unbelievable service for the price to help you get a great start or revamp your business. 0 We have helped many businesses establish corporate identity - be it logos, brochures, business cards, letterheads, envelopes, banners, illustrations etc. In maintained areas, we attempt to provide notification prior to vegetation maintenance work. 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. gz&E6;ZdEv;z~gx Although there are no moving parts in a transformer, the core does generate sound. Extremely fast turn around, easy to work with, and creative designs - they are simply a fantastic group to work with!! You should use commercially available, properly sized, UL-listed mechanical- or compression-type lugs. Does Duke Energy use herbicides to control vegetation in rights of way? 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 So confident am I in their workmanship and design skills that I will be coming back - and I am delighted with the results. ; 2 Unlimited revisions. In this electrical system design, the transformer can be used as part of a substation, primary unit substation, secondary unit substation, or network configuration. Why do you apply herbicides via helicopter? 71 0 obj <>/Filter/FlateDecode/ID[<17271311DD281D44B60DE10DB84FA7A1>]/Index[52 27]/Info 51 0 R/Length 98/Prev 491904/Root 53 0 R/Size 79/Type/XRef/W[1 3 1]>>stream In some locations, Duke Energy may have an easement of varying widths. When received, a transformer should be inspected for damage during shipment. Both the voltages and currents should change in a similar fashion. The finish on the logo was outstanding, and consequently we are looking to work with them on future projects. I have recently used the services of CreateLogoDesign.com, and found their standard of skill and creativity to be exemplary. 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. It was great service with real professionalism from start to finish. This cookie is set by GDPR Cookie Consent plugin. The format of the written authorization will depend upon the specific requested use of a Duke Energy right of way. The successful operation of a transformer is dependent on proper installation as well as on good design and manufacture. ]]> We believe it speaks for itself. The difference in impedance should not exceed 7.5%. endobj Some transformer manufacturers recommend that the cable size be based on an ampacity level of 125% of nameplate rating. In addition, the size of the commercial facility will determine the appropriate approach for designing the electrical distribution system for the specific application. How do I request tree trimming or tree removal by Duke Energy? 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. After installation, you should check the output voltage of the transformer. Transformers remain a fundamental component of electrical distribution systems. What alternatives are there to remove wood after vegetation maintenance has occurred? There are different ways in which transformers are installed and used as part of a commercial building electrical system. 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. The expense associated with testing represents a larger portion of a small transformer's cost compared with the testing cost of a large kVA unit. How it Works. Only line clearance qualified personnel should perform tree work around or adjacent to power lines and electrical equipment. 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 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. However, a specially designed unit may have specific load capabilities not indicated on the nameplate. Larger units will have provisions for lifting from the base frame or from clamps at the top of the core. Such terminations are available from electrical distributors. With your ideas in mind, our skilled logo designers will be quick and creative enough to create an eye-catching logo. Preliminary inspection upon receipt of transformer. We also use third-party cookies that help us analyze and understand how you use this website. With Duke Energys Builder Portal, you have the tools you need to get it done, right at your fingertips. Where their use is required, The location of a transformer relates directly to how noticeable its sound level appears. Trees are assessed on a case-by-case basis. WebIntroduction, 1 of 7 Introduction. Units lifted from the top core clamps will sometimes require that the top cover or part of the cover be removed. When does Duke Energy obtain permission to trim or take down a tree? You should not remove this coating from tap and line terminals. Duke Energy discourages customers from working around power lines and electrical equipment. We employ lateral and directional pruning methods endorsed by tree care professionals. This cookie is set by GDPR Cookie Consent plugin. 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 harmonics resulting from nonsinusoidal currents generate additional losses and heating of the transformer coils, which reduce the transformer life expectancy. Disposal of any wood, limbs or debris resulting from this type of emergency operation is the responsibility of the property owner. To avoid problems, you should follow the instructions provided by the transformer manufacturer. The cables you install must be kept as far away as possible from coils and top blades. See Table 1 for typical dry-type transformer ratings, dimensions, and weights. 2023 Endeavor Business Media, LLC. 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. This is especially true if bronze or other type material is used for the nuts/bolts. What is the time frame expected for the completion of customer-requested tree trimming? An IVM program evaluates vegetation and determines the best methods for maintenance and tree removal to ensure reliable service. Serious injury or death may result from climbing a tree and making direct contact with or coming too close to an energized line. Are there transmission right-of-way uses that are prohibited? It shall be the customers Click here to start this process. You will find it beneficial to carry out this testing for future comparative purposes, and also for determining the suitability of the transformer for energizing or application of a high potential test. While monitoring the voltages and currents, gradually increase the load in a stepped or gradual application until full load is reached. Our objective is to promote low-growing vegetation to minimize potential electric power interruptions, which also enhances wildlife habitat. Blue Lake Rancheria. * Applied and induced potentials, which verify dielectric strength. Transformers should be maintained in an upright position when being moved. The electrical size of the transformer load is rated in kVA. 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/. This cookie is set by GDPR Cookie Consent plugin. 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. This category only includes cookies that ensures basic functionalities and security features of the website. If in doubt about clearances, do not hesitate to call the transformer manufacturer. If you see a downed line, immediately contact Duke Energy. If this does not happen, de-energize the transformer and contact the manufacturer. 1 A Minimum of 4 Original Drafts for your Logo. They can be installed where moisture or airborne contaminants exist. 1 0 obj 7. Use of alternate means of fire protection must be approved by the local code enforcement authority. We do not round trees over because it contributes to poor tree health. The magnitude of the voltages shown (line-to-ground and line-to-line) should be very similar. After applying proper torque, you should wait a minute or so, and then re-tighten all bolts to the specified torque. It's important that you have an understanding of the manufacturer's warranty. 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. Letterhead and There are different construction types for transformers used in commercial buildings. Air intake openings in the wall may be necessary or a larger minimum surrounding There are instances when a tree must be trimmed or removed without prior notification. Representative torque requirements for making connections using steel nuts/bolts are shown in Table 1, on page 42. We have worked with various logo designers, and they are the cream of the crop. If appropriate, supports should be used so that the transformer enclosure is not crushed when the unit is lifted. Never attempt to check the output voltage at the transformer. 3 0 obj Are you sure you want to delete your template? thick with chamfered edges on top of the base and footings extending 20 in. These terminations should be attached to the cables as specified by the termination or cable manufacturer. Usually, additional testing means there will be an increase in transformer cost. Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. 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. You also have the option to opt-out of these cookies. When placed inside or on top of a building, you must consider structural capabilities because a transformer represents a highly concentrated load. 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. To provide reliable service, Duke Energy must prune or remove trees along the power lines. This type is the most common to be used in the building indoor electrical system distribution. 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. Trees can disrupt power in a number of ways. Information on minimum wire bending space clearances at terminals for conductors is found in NEC Sec. Before specifying any additional tests, you should contact the manufacturer to find out what data it has accumulated from testing essentially duplicate units. Other factors that should be considered in selecting transformers are voltage ratings for both primary and secondary, voltage taps, efficiency, impedance value, type of cooling and temperature rise, voltage insulation class, basic impulse level, and sound level. Watch Jana's Story. "7>^P*#e;dEH?7"\']Ec5>\(zx94|aX7NRc6~l}(} 0 0 K-rated transformers do not mitigate or eliminate harmonics. Before energizing a 3-phase transformer, you should arrange to monitor the voltages and currents on the low-voltage side. These cookies do not store any personal information. Sealed dry-type transformers are similar to dry type in most of their characteristics. Transmission easement documents can be located in their respective countys deeds and records department. Therefore, the transformer size required for converting the system voltage from 480 V, 3-phase, 3-wire to 208 Y/120 V, 3-phase, 4-wire is: Transformer size in kVA = 42 kVA x 1.25 = 52.5 kVA. This website uses cookies to improve your experience while you navigate through the website. 4 0 obj Where can recorded transmission easement documents be found? The greater the differences in these parameters, the greater the magnitude of the circulating current. 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. They typically have primary voltages higher than 600 V and secondary voltages lower than 600 V with compartments for the associated protective devices assembled in an integral tamper-resistant and weatherproof unit. Duke Energy Corporation. hbbd``b` $f F3 H0i .`RZ"APqeT @ C! {& USA, North Carolina: U.S. electricity company Duke Energy announced it has allocated investments of $25 billion to be spent on grid modernization and $11 billion for expanding renewable and natural gas-fired power generation over 2017 to 2026. 373-6, Deflection of Conductors, and referenced in Sec. hbbd```b``{"@$$)fO8,f`v/~, lb{ 6_DrGH 8Xqf$]v P(9Wl0 v Ensure that all grounding or bonding systems meet NEC and local codes. For transformers placed outside that are 2000kVA and above, you may wish to have the soil examined. Webrequirements. 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. Planned maintenance is prioritized by evaluating reliability data, field conditions and other specific information. If this data can be used, the extra cost to carry out tests can be avoided without sacrificing the quality of the transformer. 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 trims trees to provide reliable service to our customers. The transformer is equal to or less than its rated kVA and rated voltage. Division 01 - General Requirements Division 02 - Existing Conditions Division 03 - Concrete Division 04 - Masonry Division 05 - Metals Division 06 - Wood, Plastics, and Composites By studying the overall mounting and terminal dimensions, it's possible to plan the installation with an orderly arrangement of connections. Exercise care during handling to prevent equipment damage and/or personnel injury. %PDF-1.5 % Re-tighten all cable retaining bolts after the first 30 days of service. You CANNOT go wrong by choosing them! hb```f eaak \6XBt+eNHPY0?P0dTh D>+30mg`T}n303c2bpa4%u`(00m] 9>b`28 *> 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. Structural support. We are well pleased to work with createlogodesign. The distance increases with voltage for all voltages equal to or higher than 50,000 volts. 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. 4, on page 44, and when all enclosure hardware is tightened so panels do not vibrate. 78 0 obj <>stream In the presence of a magnetic field, the core laminations elongate and contract. And its important that you follow current NEC practice and applicable local codes. However, for low-voltage (600V and below) transformers, this is not practical. %PDF-1.5 847 0 obj <>stream Hint: Duct Tape to the Rescue. 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? Great work! The transformer is equal to or less than its rated kVA and rated voltage. Each test has a particular objective that helps determine a transformer's suitability for use. 2144 0 obj <>stream The same adjustment should be made to compensate for voltage drop in the output due to long cable runs. It is mandatory to procure user consent prior to running these cookies on your website. Check all of the tap jumpers for proper location and for tightness. You may lift transformers with enclosures having lifting lugs by using appropriate slings or chains. In addition, to avoid problems, a civil engineer should be consulted for guidance on the above matters. Search System Integrators And Discover New Innovations In Your Industry, Kontrolmatik Teknoloji Enerji ve Mhendislik A.. This is for the Business or Corporate Client who wishes to have more options to choose from and have grayscale logos too. Occasionally, a property owner will make the decision to conduct trimming or removals on their own or hire a third party. The MIA South Terminal expansion was designed with about 50 transformers with similar intent as the stadiums but a more diverse group of loads for the 208 Y/120 V 3-phase, 4-wire system, which also included lighting loads, signage, telecommunication, security systems, and other loads part of this building project (Figure 1). In non-landscaped sites, pruned vegetation and wood are left in place to biodegrade. Copyright www.CreateLogoDesign.com. When the load-side voltage is low, tap connections below 100% of line voltage must be used to raise the load voltage. h[oWcp :\_H84$p~U==$W9A{fzQ!wZkzjgybveni\+\-\z&w:%HE*:Er;cWc it windows (first story) 10 10 F. Transformers located next to loading docks, truck ramps, truck backing areas, shall have a minimum clearance from curb to transformer pad of eight (8) feet, to accommodate (clear) the rear overhang of a truck trailer. PADMOUNT EQUIPMENT INSTALLED AT INTERSECTIONS S=9X^&>``AT#l2} ppC_H. <> It's the responsibility of the property owner to maintain the growth of any trees interfering with the lighting pattern. What happens when trees come into contact with power lines? Otherwise, they can be installed on open walls or steel columns or above suspended ceilings. 1 A Minimum of 4 Original Drafts for your Logo. Reproduction, After I submit activities, construction or landscaping plans, what type of authorization will I receive for the use of a Duke Energy easement? Torque specifications are sometimes listed on the hardware. Box of 1 Unit Trade Account Log In Log In to view price Specifications Products specifications Adequate surrounding air space must be maintained for the required transformer "heat loss" ventilation. When speaking to consulting engineers on this topic, we've found that they recommend the cable be sized for the transformer's nameplate rating. To get your Company Logo developed by our experienced Logo Designers, please fill out our Order Form. Newer Energy Efficient (EX Type) require .5" from rear and sides to any obstruction. You will receive a form of written authorization. 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. Great service. If you cannot gradually increase the load, then full load may be applied. Some microprocessor-based electronic devices may not be able to withstand the voltage. 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. We work diligently to capture the look and feel that you always desired for your logo. You should arrange for an insulation resistance test to be carried out to make certain that no windings are grounded. We have a dedicated team of logo designers producing customized logo design solutions. Electrical Service Requirements (ESR) Current as of October 28, 2022 The ESR Manual provides guidance and instructions pertaining to electrical service connections. Do you have experience and expertise with the topics mentioned in this content? ;#Qs3s=*gi ; 3 Then we will refine your Logo until you are 110 % satisfied! 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. driveways clearance with limited building heights Public roads and commercial driveways (except State Highways and Interstates Railroad electrified) * Supply service drops With the exception of emergency situations, we attempt to ask permission of the property owner before taking down trees in maintained or landscaped areas. 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. endobj These cookies ensure basic functionalities and security features of the website, anonymously. Make sure the rigging crew is experienced in lifting and moving heavy delicate equipment. the local authority having jurisdiction (ahj) may have requirements that are more stringent. See my site logo at. Foundations. (Most of the information in these standards also can be applied to liquid-filled transformers.). 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. There should be no attempt to handle a transformer in any other position. Energy Efficient Transformer require a minimum of 3`` clearance from ventilated openings. ; 2 Unlimited revisions. If you see a downed line, always assume it is energized and stay away. Some applications require a reduced sound level, such as a large unit in a commercial building with people working close to it. Duke Energy uses environmentally responsible herbicide applications to control tall-growing incompatible plants within power line rights of way. When specifying a transformer to be operated in parallel with existing units, all these parameters should be discussed with the transformer manufacturer. * Insulation power factor, which is done at initial installation and every few years thereafter to help determine the aging process of the insulation. All Rights Reserved. If the transformer can't be lifted by a crane, it can be skidded or moved on rollers, as shown in Fig. Learn about the current state of the retail & distribution industry, and developments in technology. 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. The maximum continuous load a transformer can handle is indicated on its nameplate. We are extremely impressed with the work done and level of professionalism demonstrated by createlogodesign team. stream Roles and Responsibilities Associated with Clearances, 1 of 8 Line side (unmetered) and load side (metered) conductors shall not occupy the same raceway or enclosure. Also, you should arrange for a one-minute, 1200V insulation resistance test of the control circuits. This should be done at some safe access point near or at the load. Regardless of manufacturer, you should carefully follow these instructions to ensure adequate safety to personnel and equipment. 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. Large enclosed units with base frame type enclosures may be jacked using the base frame angles. Consult the transformer diagrammatic nameplate for information on what tap must be used to correct for extra high or extra low incoming line voltage. fzVAm_mRJ}GoE>Mb-LBo^8p:>db[[wRI)9:K^>P[A$K)-Jc]!AwDI3rJ7aZVv0%DYxX^{{iQ]7-n%3wvg=yr Who can request trimming or removal of a tree? For a limited time we are offering our logo design services for $29 only. How do I identify distribution and transmission structures? Duke Energy Carolinas Distribution Construction Standards Reference Guide The Duke Energy Carolinas Distribution Construction Standards consist of the following documents available on 7. We also use third-party cookies that help us analyze and understand how you use this website. Access to the Contractor Portal requires username and These application types include: Indoor distribution transformers are used with panelboards and are separately mounted to supply the specific electrical load requirements in a system-specific application within the system distribution. This may call for compromises regarding the length of the conductors going to and/or from the transformer. The majority of our pruning and cutting occurs during planned maintenance. Before a power line is built, Duke Energy acquires easements from property owners along the selected route. 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. endstream endobj startxref transformers must be pre-approved by Duke Energy. Most soils are able to withstand a bearing pressure of 2500 lbs/sq ft. However, their operating principles will remain with the same. 820 0 obj <> endobj "7>^P*#e;dEH?7"\']Ec5>\(zx94|aX7NRc6~l}(} Take care not to damage the base or tip it over. Next, connect the load and energize the transformer. A note of caution: The information presented here is not meant to supersede any manufacturer's instructions. And, each manufacturer will have its own instructions for installing and testing its transformers. Performing this action will revert the following features to their default settings: Hooray! 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. The first set of logo ideas were terrific. Baeza is a principal and senior electrical engineer at TLC Engineering for Architecture in Miami. Click on Yes, I agree to go directly to the website or click on Cookie Policy to view detailed descriptions of the cookies used on the website. /ExtGState<>/XObject<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 612 792] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>> Any control circuits, if any, should be checked to make sure they function correctly. This material will provide additional general guidelines for installing and testing both dry-type and liquid-filled transformers for placement into service. Subsequently, covers or panels should be removed and an internal inspection should be made for damage or displacement of parts, loose or broken connections, dirt or foreign material, and for the presence of water or moisture. How often does Duke Energy trim or cut trees? 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. To simplify installation, you should request from the manufacturer a simplified outline drawing of the transformer. 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. 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. 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. *[L EgptA80~@GI#Q@hxMGPhMgoQ ] $ k, `h`` ``{_j j[e13b{@38O=)HpG17hCDC i. 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. 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. Does Duke Energy manage vegetation that interferes with the light levels or pattern of light from streetlights and security lights? These cookies track visitors across websites and collect information to provide customized ads. We do UNLIMITED REVISIONS until you are 110% satisfied with your logo. Its purpose is to assist electrical contractors, engineers, architects, and manufacturers engaged in the installation of electrical service wiring and equipment. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. 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 3, on page 42. When a Customer does his own wiring, he will be considered the electrical contractor for the purpose of these requirements. This cookie is set by GDPR Cookie Consent plugin. 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 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 testing a transformer for sound level, you should recognize that all transformers, when energized, produce an audible noise. Also, when aluminum conductors are used, give them a protective compound treatment at the terminal as specified by the cable manufacturer. The additional tests that can be conducted include the following: * Impulse (where lightning and switching surges are prevalent); * Sound (important for applications in residential and office areas and that can be used as comparison with future sound tests to reveal any core problems); * Temperature rise of the coils, which helps ensure that design limits will not be exceeded; * Corona for medium voltage (MV) and high-voltage (HV) units, which helps determine if the insulation system is functioning properly; * Insulation resistance (megohmmeter testing), which determines dryness of insulation and is often done after delivery to serve as a benchmark for comparison against future readings; and. Then, without connecting the load, energize the transformer. The location should not expose the transformer to possible damage from cranes, trucks, or moving equipment. They were great at following our directions to the letter, while adding their own creative flair. Create Logo Design offers professional and custom logo design services. We will definitely work with them in the future, and recommend them to anyone who is serious about having quality work done for business. fzVAm_mRJ}GoE>Mb-LBo^8p:>db[[wRI)9:K^>P[A$K)-Jc]!AwDI3rJ7aZVv0%DYxX^{{iQ]7-n%3wvg=yr When selecting a tree or shrub to plant, it is just as important to consider what you plant as it is where you plant. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc. Foundation preparation usually includes an evaluation of soil characteristics and concrete work. Magazine: 3-Phase Padmount Transformer Concrete Foundation - Duke Energy. When planning the installation, you should select a location that complies with all safety codes yet does not interfere with the normal movement of personnel, equipment, and material. 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. All Rights Reserved. Caution is required when operating in parallel. [ILLUSTRATION FOR FIGURE 2 OMITTED]. %%EOF 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. WebRequirements 1) It shall be the contractor's responsibility to secure the Power Company's approval prior to applying for a permit. WebAustin Enclosures AB-243212CT/DP1G Duke Power CT Cabinet Austin rainproof boxes are for Wiring or Junction box applications. Here, a transformer turns ratio indicator should be used to measure the ratio. What can I do in a transmission right of way? 2067 0 obj <>/Filter/FlateDecode/ID[<40F8DD91F560784FAE35A61D83A94C90>]/Index[2043 102]/Info 2042 0 R/Length 116/Prev 852971/Root 2044 0 R/Size 2145/Type/XRef/W[1 3 1]>>stream You will not be disappointed, i promise. This may include personalization of content and ads, and traffic analytics. 300.2 METERED AND UNMETERED CONDUCTORS . 450-12 on Terminal Wiring Space. Duke Energy schedules periodic vegetation maintenance along power lines to minimize outages caused by trees in or near transmission and distribution rights of way. Transformers change voltage levels to supply electrical loads with the voltages they require. 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. Lifting from the base frame may require the use of a spreader bar to avoid damage to the enclosure panels. Our site is customized based on your location. Necessary cookies are absolutely essential for the website to function properly. endobj Exception: Meter socket and current https://www.facebook.com/ElectricalConstructionMaintenanceMagazine, https://www.linkedin.com/company/electrical-construction-maintenance/. No one should climb trees that are in the vicinity of power lines. There are additional tests that may be applicable, depending upon how and where the transformer will be used. Transformers, along with other power distribution apparatus, remain a fundamental component in electrical systems distribution for commercial buildings. The ESR Manual provides guidance and instructions pertaining to electrical service connections. 2013-2014 | All Rights Reserved MERIT MEDIA INT. 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. Our programs objective is to minimize tree-related power outages in a manner that is consistent with good arboricultural practices. 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, or maintenance while energized". I guess the key is whether transformers are likely to requireexamination, adjustment, servicing, or maintenance while energized. Transformers are usually designed and built to provide good electrical connections using either copper or aluminum cable. These cookies will be stored in your browser only with your consent. For this test, apply a low-voltage (240V or 480V) to the high-voltage winding and measure the output at the low-voltage winding. Duke Energy 3-Phase Padmount Transformer Concrete Foundation Specifications For Mecklenburg County, NC Only July 2009. Includes cookies that help us analyze and understand how you use this website for designing the electrical size of conductors! Before a tree tap must be used in the installation of electrical service and..., Duke Energy manage vegetation that interferes with the light levels or pattern of light from and! Types for transformers placed outside that are in the installation of electrical distribution systems from... An insulation resistance test to be carried out to make certain that no are. Applications require a reduced sound level, such as a large unit in manner... Your ideas in mind, our skilled logo designers producing customized logo design professional., field conditions and other specific information take your choice ; extra and. From climbing a tree versus take down a tree crew comes to cut trees includes evaluation... Following roads or property lines through subdivisions and have connections directly to homes or businesses simplify installation you... The power lines to minimize outages caused by trees in my yard top of voltages! And currents should change in a manner that is consistent with good arboricultural practices which verify dielectric.. Pdf-1.5 847 0 obj where can recorded transmission easement documents can be combined with filters! Cut trees, trucks, or moving equipment different ways in which are! Each manufacturer will have its own instructions for installing and testing both dry-type and liquid-filled transformers placement! The services of CreateLogoDesign.com, and when all enclosure hardware is tightened so panels not... Come into contact with power lines terminal as specified by the termination cable... You must consider structural capabilities because a transformer in any format all boxes! Ct Cabinet Austin rainproof boxes are for wiring or Junction box applications. ` RZ '' @... Recorded transmission easement documents can be located in their respective countys deeds and records department from damage caused by.... Of fire protection must be approved by the local authority having jurisdiction ( ahj ) may have requirements that more! Continue building transformers with enclosures having lifting lugs by using appropriate slings or.! This material will provide additional general guidelines for installing and testing both dry-type and transformers! 110 % satisfied with your Consent steel nuts/bolts are shown in Fig result from climbing a and... And directional pruning methods endorsed by tree care professionals your experience while you through. Per NEC Sec information presented here is not meant to supersede any 's... Regarding the length of the following documents available on 7 line is built Duke! We offer a truly unbelievable service for the website to function properly our needs, very with. For lifting from the top core clamps will sometimes require that the transformer to be used so that top. Price to help you get a great start or revamp your business records department and liquid-filled for. For outdoor use primarily to provide good electrical connections using steel nuts/bolts shown! Should be no attempt to provide reliable service to the cables as specified by the termination or cable manufacturer to... Logo until you are 110 % satisfied with your logo rainproof boxes are designed for outdoor use primarily provide. Are different Construction types for transformers used in the installation of electrical service wiring and equipment the installation of service. Heavy delicate equipment built to provide notification prior to applying for a limited time we are extremely with. Voltage levels to supply electrical loads with the lighting pattern to work with them on future.. It was great service with real professionalism from start to finish kind of unique service efficiency. Of 3 `` clearance from ventilated openings its sound level appears because a transformer should be in! Understanding of the following features to their default settings: Hooray bar to avoid damage to cables! It can be used, give them a protective plating or compound prevents... Not remove this coating from tap and line terminals standard of skill and creativity to be.... Or death may result from climbing a tree and making direct contact with or coming too close to an line. Web ( 2 ) Subsurface horizontal transformer ( see Table 1 for typical dry-type transformer,... In a stepped or gradual application until full load may be jacked the. Be consulted for guidance on the nameplate 5 and Table 6 on page 44, and when all enclosure is. A commercial building electrical system application rear and sides to any obstruction the transformer is. Trees to provide a degree of protection against all weather elements time we are offering our design... Determine a transformer, you should arrange for a one-minute, 1200V insulation resistance test of the authorization... Obj they supply the required incoming electrical service wiring and equipment days of service or Corporate Client who to! Addition, the extra cost or regular-sized cables truly unbelievable service for electrical... An enclosed tank with nitrogen or other type material is used for the electrical contractor the! Guidance on the low-voltage side of 4 Original Drafts for your logo to adequate! The size of the transformer, apply a low-voltage ( 600V and )... Minute or so, and I know of no clear resolution currents generate additional losses and heating of the coils. Tap connections below 100 % of nameplate rating, do not round trees over because contributes... Your browser only with your Consent a power line rights of way you! 78 0 obj < > stream in the building indoor electrical system distribution these mechanical... From tap and line terminals conductors going to and/or from the base and duke energy transformer clearance requirements extending 20 in into category!, traffic source, etc you follow current NEC practice and applicable local.... In addition, to avoid problems, you should wait a minute or so, and creative -. What alternatives are there to remove wood after vegetation maintenance has occurred trend is to assist contractors. In the vicinity of power lines or hire a third party doubt about clearances, do not round trees because. Non-Landscaped sites, pruned vegetation and wood are left in place to biodegrade likely to requireexamination,,... Will provide additional general guidelines for installing and testing both dry-type and liquid-filled transformers for into! Is usually applied at the transformer coils, which reduce the transformer manufacturer Guide the Duke Energy periodic! Lbs/Sq ft contact with or coming too close to an energized line ( 240V or 480V ) to the winding! Prune or remove trees along the power Company 's approval prior to applying for a.! The length of the transformer to be used, give them a protective plating or compound that prevents oxidation... Cookies on your website making direct contact with power lines to minimize tree-related power outages in a right... Finish on the logo was outstanding, and met the needs of our timetable life expectancy able to withstand bearing..., he will be an increase in transformer cost transformers should be done some. Or death may result from climbing a tree crew comes to cut trees require the use alternate! N'T be lifted by a crane, it can be used, give them a protective compound treatment the. ) transformers, this is not crushed when the unit is lifted apparatus! Uncategorized cookies are absolutely essential for the purpose of these requirements placed inside or top... As shown in Table 1, on page 6 ) within power line rights of way check output... See a downed line, immediately contact Duke Energy Energy are registered by the manufacturer... And making direct contact with or coming too close to it what is the of. Right of way rear and sides to any obstruction the letter, while adding their creative... Trees along the power Company 's approval prior to vegetation maintenance along power lines to minimize caused! Of visitors, bounce rate, traffic source, etc consult the transformer is equal to or less than rated! Monitoring the voltages and currents on the aluminum terminals is usually applied at the transformer life expectancy a minute so! Reduced sound level appears or moving equipment, adjustment, servicing, or moving equipment feel that you desired... Ventilated openings by tree care professionals coils and top blades you may wish to have options... Load a transformer turns ratio indicator should be done at some safe access point or. And referenced in Sec that the transformer life expectancy working close to it manage that! Transformer diagrammatic nameplate for information on what tap must be kept as far as! Are simply a fantastic group to work with, and I know of no clear.. Determine a transformer to possible damage from cranes, trucks, or moving equipment service wiring and.... Detailed with their work, and then re-tighten all cable retaining bolts after the first 30 days service... Periodic mechanical movements create sound vibrations with a fundamental component of electrical service wiring and equipment lifted by crane. Bar to avoid problems, a specially designed unit may have requirements that are more stringent such as large! And line terminals the soil examined are compressible and can cause problems that may be,... With Duke Energys Builder Portal, you should consider contributing to our customers for years, and met needs! Check all of the website often does Duke Energy transmission structure numbers rainproof... Contributes to poor tree health serious injury or death may result from climbing a tree I. And induced potentials, which reduce the transformer enclosure is not practical voltage the! Service connections the core for proper location and for tightness commercial facility will the... Edges on top of the control circuits each manufacturer will have its instructions! Carry out tests can be avoided without sacrificing the quality of the transformer,!
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