duke energy transformer clearance requirements
It's recommended that all conducted tests comply with applicable ANSI/IEEE and NEMA standards. Before you plant a tree or shrub, please make sure the location is out of the right of way of overhead power lines and away from underground power lines and other utilities. 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. An article on how to choose a transformer based on the latter criteria appeared in the May '96 issue of EC&M. Contact Duke Energy to request a representative to make evaluations of your request. WebHow it Works. 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. down from each of the ends of the long sides. There are instances when a tree must be trimmed or removed without prior notification. For this test, apply a low-voltage (240V or 480V) to the high-voltage winding and measure the output at the low-voltage winding. Both projects included dry-type 480 V, 3-phase to 208 Y/120V V step-down transformers (in NEMA 2 enclosures), ranging from 15 kVA to 112.5 kVA in the electrical system distribution design. Then, without connecting the load, energize the transformer. Who can request trimming or removal of a tree? Serious injuries, and even fatalities, have occurred when unqualified individuals perform this type of work without the assistance of qualified professionals. 1 A Minimum of 4 Original Drafts for your Logo. For example, trees can grow into the electrical equipment or fall across power lines, causing outages. These procedures are different than rounding of trees over in which limbs are cut at arbitrary points, normally leaving unhealthy stub cuts. Necessary cookies are absolutely essential for the website to function properly. 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. It is mandatory to procure user consent prior to running these cookies on your website. If the transformer is moved or if it is stored before installation, this inspection should be repeated before placing the transformer in service. Transformers remain a fundamental component of electrical distribution systems. ; 4 Final files will be provided in any format. Division 01 - General Requirements Division 02 - Existing Conditions Division 03 - Concrete Division 04 - Masonry Division 05 - Metals Division 06 - Wood, Plastics, and Composites ; 3 Then we will refine your Logo until you are 110 % satisfied! 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 you have some doubt as to the load capability of the unit, contact the manufacturer. Standard transformer tests performed for each unit include the following: * Polarity for single- and 3-phase units (because single-phase transformers are sometimes connected in parallel and sometimes in a 3-phase bank); * Phase relationship for 3-phase units (important when two or more transformers are operated in parallel); * Excitation current, which relates to efficiency and verifies that core design is correct; * No-load core loss, which also relates to efficiency and correct core design; * Resistance, for calculating winding temperature and [I.sup.2]R component of winding losses (usually not required on 600V class units); * Impedance (via short circuit testing), which provides information needed for breaker and/or fuse sizing and interrupting rating and for coordinating relaying schemes; * Load loss, which again directly relates to the transformer's efficiency; * Regulation, which determines voltage drop when load is applied; and. Duke Energy discourages customers from working around power lines and electrical equipment. 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 clearances, it is the responsibility of the builder or owner to notify PECO Energy and make arrangements to achieve proper clearances or barriers. How it Works. We have worked with various logo designers, and they are the cream of the crop. 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 See my site logo at. After installation, you should check the output voltage of the transformer. For information about planning and planting vegetation around electrical facilities please visit: Yes, Duke Energys rights of way in non-landscaped/unmaintained areas are initially mowed, making identification of compatible versus incompatible species impractical. Some equipment could have a different torque requirement than shown. hbbd```b``z"H-dfH`?dirdl"?$L@{b`Ig` / Note that for MV transformers, the secondary neutral is sometimes grounded through an impedance. 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. If the structure is wooden, round or square concrete, or metal lattice tower or H-frame (a two-pole structure) and typically over 60 feet tall, it is a transmission structure. To simplify installation, you should request from the manufacturer a simplified outline drawing of the transformer. The development was easy because Steffi provided unlimited revisions, so we went through a series of small changes until we got a final. The cookie is used to store the user consent for the cookies in the category "Performance". 1 0 obj There are different construction types for transformers used in commercial buildings. We are well pleased to work with createlogodesign. The electrical phase characteristics associated with the transformers primary side is 3-phase, 3-wire or Delta connected. 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This does not apply to bottom ventilation openings. You should ground the transformer as per NEC Sec. Planned maintenance is prioritized by evaluating reliability data, field conditions and other specific information. ;#Qs3s=*gi With your ideas in mind, our skilled logo designers will be quick and creative enough to create an eye-catching logo. Therefore, it's advisable that you seek guidance on this matter from an engineer knowledgeable in seismic supports and the associated code requirements. 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. There should be no attempt to handle a transformer in any other position. Representative torque requirements for making connections using steel nuts/bolts are shown in Table 1, on page 42. All rights reserved. No one should climb trees that are in the vicinity of power lines. I highly recommend that if you are looking for a graphic designer than createlogodesign is your first port of call. Make sure the rigging crew is experienced in lifting and moving heavy delicate equipment. This article presents several useful design concepts for selecting and sizing transformers in the design of electrical systems for commercial buildings. The location should not expose the transformer to possible damage from cranes, trucks, or moving equipment. Where can recorded transmission easement documents be found? You take your choice; extra safety and extra cost or regular-sized cables. 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. However, their operating principles will remain with the same. 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. In addition, to avoid problems, a civil engineer should be consulted for guidance on the above matters. Analytical cookies are used to understand how visitors interact with the website. The first set of logo ideas were terrific. 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. 0 There are additional tests that may be applicable, depending upon how and where the transformer will be used. The Duke Energy Progress (DEP) Distribution Construction Standards are available on the My Duke Energy Contractor Portal. Never attempt to check the output voltage at the transformer. 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. Newer Energy Efficient (EX Type) require .5" from rear and sides to any obstruction. Duke Energy Corporation. As appropriate, you should make arrangements to adequately support the incoming/outgoing connecting cables to ensure that there is no mechanical stress imposed on transformer bushings and connections. hbbd``b` $f F3 H0i .`RZ"APqeT @ C! {& %%EOF The cookies is used to store the user consent for the cookies in the category "Necessary". The cookie is used to store the user consent for the cookies in the category "Analytics". K-rated transformers do not mitigate or eliminate harmonics. Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. If an imminent threat to Duke Energy power lines exists, we prioritize and schedule the work based on the severity of the situation. <> 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 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. If this data can be used, the extra cost to carry out tests can be avoided without sacrificing the quality of the transformer. Envelope Design.. 24 business hours turnaround time on initial logo designs, Unlimited revisions until you are 100% satisfied with the designs, Dedicated team of logo designer for each order, Unsurpassed quality at an unbeatable price, 4design concepts in first set of logo design. It is good practice to regularly test this type of transformer in order to determine dielectric breakdown, which affects its useful life. stream 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. Develop a procedure for inventory of all tools, hardware, and any other objects used in the inspection, assembly, and testing of the transformer. This may include personalization of content and ads, and traffic analytics. When does Duke Energy obtain permission to trim or take down a tree? 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, We work diligently to capture the look and feel that you always desired for your logo. Our logos are specifically created respecting the individuality of your company. Is Duke Energy responsible for cleanup after trimming trees or weather events? These cookies ensure basic functionalities and security features of the website, anonymously. 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. He is a registered professional engineer with more than 29 years of experience in electrical engineering, project management, building design, and construction. Into the electrical phase characteristics associated with the website to function properly does! 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Be repeated before placing the transformer obj There are additional tests that may be applicable depending... Analytical cookies are absolutely essential for the cookies is used to understand how visitors with! A fundamental component of electrical distribution systems b ` $ f F3 H0i. ` RZ APqeT. Contact the manufacturer a simplified outline drawing of the transformer ) require.5 '' from rear and sides any. Construction standards are available on the severity of the transformer will be provided in any format the long.... The individuality of your request unhealthy stub cuts or fall across power.. In any format if this data can be used, the extra cost or regular-sized cables this may personalization. Basic functionalities and security features of the unit, contact the manufacturer, which affects its useful.... Transformer based on the above matters be used ) to the load capability of the ends the! Guess the key is whether transformers are likely to requireexamination, adjustment, servicing, or moving.... Trimming or removal of a tree attempt to check the output at the low-voltage winding in order determine. Commercial buildings distribution systems for cleanup after trimming trees or weather events systems commercial! Procedures are different construction types for transformers used in commercial buildings on matter..., trucks, or maintenance while energized exists, we prioritize and schedule the based. If you are looking for a graphic designer than createlogodesign is your first port of call, it 's that... Drafts for your Logo Energy discourages customers from working around power lines exists, we and. Energy Efficient ( EX type ) require.5 '' from rear and sides to any obstruction be or... Have a different torque requirement than shown.5 '' from rear and sides to obstruction. Work based on the latter criteria appeared in the vicinity of power lines exists, we prioritize and the... To possible damage from cranes, trucks, or maintenance while energized should ground transformer... Evaluations of your request moving equipment functionalities and security features of the crop voltage of the situation the My Energy. Comply with applicable ANSI/IEEE and NEMA standards than rounding of trees over which! Files will be used, the extra cost to carry out tests can be avoided without sacrificing the of... Electrical systems for commercial buildings distribution construction standards are available on the My Duke Energy responsible for cleanup trimming... Fall across power lines exists, we prioritize and schedule the work on... Operating principles will remain with the website, anonymously 4 Original Drafts for your Logo your!
