duke energy transformer clearance requirements

down from each of the ends of the long sides. Disposal of any wood, limbs or debris resulting from this type of emergency operation is the responsibility of the property owner. None of our competitors offer this kind of unique service. 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. Whatever the choice, the cable insulation rating must be adequate for the installation. The difference is they contain an enclosed tank with nitrogen or other dielectric gas to protect the windings. WebPer 450.27 of the NEC; Combustible material, combustible buildings, and parts of buildings, fire escapes, and door and window openings shall be safeguarded from fires originating in oil-insulated transformers installed on roofs, attached to or adjacent to a building or combustible material. 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. Are you sure you want to delete your template? Duke Energy Transmission procedure documents are the property of Duke Energy. This is for the Business or Corporate Client who wishes to have more options to choose from and have grayscale logos too. 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. 3 0 obj 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. With the exception of emergency situations, we attempt to ask permission of the property owner before taking down trees in maintained or landscaped areas. A check sheet should be used to record all items, and verification should be made that these items have been properly accounted for upon completion of work. Transformers remain a fundamental component of electrical distribution systems. Usually, lateral bracing and/or an extra solid anchorage will be required. If an imminent threat to Duke Energy power lines exists, we prioritize and schedule the work based on the severity of the situation. 4 0 obj A protective plating or compound that prevents surface oxidation on the aluminum terminals is usually applied at the factory. *[L EgptA80~@GI#Q@hxMGPhMgoQ ] $ k, `h`` ``{_j j[e13b{@38O=)HpG17hCDC i. Larger units will have provisions for lifting from the base frame or from clamps at the top of the core. The first set of logo ideas were terrific. We also use third-party cookies that help us analyze and understand how you use this website. If this does not happen, de-energize the transformer and contact the manufacturer. Such stress could cause a bushing to crack or a connection to fail. 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, along with other power distribution apparatus, remain a fundamental component in electrical systems distribution for commercial buildings. 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. Createlogodesign were fantastic. 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. Transmission easement documents can be located in their respective countys deeds and records department. Our logos are stylish, unique and memorable. Retail & Schools Depending upon the size and load requirements of the facility, the large majority of schools (except for some very large universities) and retail facilities are served by If trees or limbs have fallen onto power lines, we will dispatch crews to clear the vegetation from power lines and equipment. Transformers are usually designed and built to provide good electrical connections using either copper or aluminum cable. However, for low-voltage (600V and below) transformers, this is not practical. Lifting from the base frame may require the use of a spreader bar to avoid damage to the enclosure panels. Non-ventilated Transformers should be a minimum of 3 inches from any obstruction on all sides and top. This type is the most common to be used in the building indoor electrical system distribution. It's the responsibility of the property owner to maintain the growth of any trees interfering with the lighting pattern. 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. Duke Energy Carolinas Distribution Construction Standards Reference Guide The Duke Energy Carolinas Distribution Construction Standards consist of the following documents available on 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. Magazine: 3-Phase Padmount Transformer Concrete Foundation - Duke Energy. Information on minimum wire bending space clearances at terminals for conductors is found in NEC Sec. You should consider this when planning the unit's installation. hb```7,^ cb'60H6wZ $(|`n`h`` ``{_j j[e13b{@38O=)HpG17hCDC i. Usually, additional testing means there will be an increase in transformer cost. The 18,688-seat FIU football stadium was designed with about 12 transformers as part of the electrical system distribution in order to supply general-use receptacles, small motors, and other loads in the stadium building structure and the attached field house building. The most common building industry standard ratings are 3, 6, 9, 15, 30, 37.5, 45, 75, 112.5, 150, 225, 300, 500, 750, and 1,000 kVA. K-rated transformers do not mitigate or eliminate harmonics. If this is not the case, deenergize the transformer and contact the manufacturer before proceeding further. These cookies will be stored in your browser only with your consent. WebDuke Energy Transmission DECorp: Duke Energy Midwest . How do I request tree trimming or tree removal by Duke Energy? 2067 0 obj <>/Filter/FlateDecode/ID[<40F8DD91F560784FAE35A61D83A94C90>]/Index[2043 102]/Info 2042 0 R/Length 116/Prev 852971/Root 2044 0 R/Size 2145/Type/XRef/W[1 3 1]>>stream Make sure the rigging crew is experienced in lifting and moving heavy delicate equipment. Never touch or try to drive over a downed power line. The weight distribution should be studied by examining the inside of the transformer enclosure for dry-type units. 0 0 You can have big-business results at a "business-on-a-budget" price! In some locations, Duke Energy may have an easement of varying widths. 1&Ub64#C #") "7KWpzJz1YeHB.r32Az{`gC~;jiV[Ceb*1rAz96lnA|3$ They are very professional, and the team knows their craft. These cookies track visitors across websites and collect information to provide customized ads. Notification may be made via door hanger, telephone call, letter, in-person contact or a combination of these methods. This category only includes cookies that ensures basic functionalities and security features of the website. However, their operating principles will remain with the same. 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 The average temperature of the cooling air during a 24-hour period is 86 F. The temperature of the cooling air at no time exceeds 104 F. Selecting Transformer selection starts with the kVA rating required to supply the loads connected in the electrical system. See Table 1 for typical dry-type transformer ratings, dimensions, and weights. This cookie is set by GDPR Cookie Consent plugin. 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 Therefore, compatible versus incompatible species are subject to removal through mowing. Such terminations are available from electrical distributors. 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. (3) Subway-LB transformer (see Table 8 on Page 7). If you see a downed line, immediately contact Duke Energy. It shall be the customers There are instances when a tree must be trimmed or removed without prior notification. Some microprocessor-based electronic devices may not be able to withstand the voltage. hbbd``b` $f F3 H0i .`RZ"APqeT @ C! {& clearances, it is the responsibility of the builder or owner to notify PECO Energy and make arrangements to achieve proper clearances or barriers. Our programs objective is to minimize tree-related power outages in a manner that is consistent with good arboricultural practices. [CDATA[// >