Whatever the choice, the cable insulation rating must be adequate for the installation. I have recently used the services of CreateLogoDesign.com, and found their standard of skill and creativity to be exemplary. hbbd```b``{"@$$)fO8,f`v/~, lb{ 6_DrGH 8Xqf$]v P(9Wl0 v When selecting a tree or shrub to plant, it is just as important to consider what you plant as it is where you plant. A protective plating or compound that prevents surface oxidation on the aluminum terminals is usually applied at the factory. It is mandatory to procure user consent prior to running these cookies on your website. Necessary cookies are absolutely essential for the website to function properly. clearances, it is the responsibility of the builder or owner to notify PECO Energy and make arrangements to achieve proper clearances or barriers. All Rights Reserved. endobj These cookies will be stored in your browser only with your consent. Sound levels associated with certain kVA ratings will vary depending upon the type of transformer and manufacturer. *[L EgptA80~@GI#Q@hxMGPhMgoQ ] $ k. See my site logo at. 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). The Duke Energy Progress (DEP) Distribution Construction Standards are available on the My Duke Energy Contractor Portal. For a limited time we are offering our logo design services for $29 only. We really liked two of them, and asked him to amalgamate them. Some manufacturers in the industry have extensive data on sounds produced by their transformers, and they usually can determine the sound level for a particular design quite accurately. After installation, you should check the output voltage of the transformer. Caution is required when operating in parallel. The revisions were done quickly and to my specifications, and often I was provided multiple versions from which to select. WebHow it Works. stream endobj Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. //-->Mb-LBo^8p:>db[[wRI)9:K^>P[A$K)-Jc]!AwDI3rJ7aZVv0%DYxX^{{iQ]7-n%3wvg=yr You should arrange for an insulation resistance test to be carried out to make certain that no windings are grounded. Before energizing the unit, it's very important that you alert all personnel installing the transformer that lethal voltages will be present inside the transformer enclosure as well as at all connection points. Yes, there are special circumstances that may include: (1) the proper ANSI cut is not a specified distance from the centerline, (2) the trunk of a mature tree is established within rights of way, (3) the tree is inhabited by an endangered species, (4) the tree is a slow-growing species or (5) there is a Department of Transportation encroachment. % This cookie is set by GDPR Cookie Consent plugin. You should check the internal connections with the diagram on the nameplate to make sure they are correct for the application. The successful operation of a transformer is dependent on proper installation as well as on good design and manufacture. 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. 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. 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. 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. Before working on the connections make sure all safety precautions have been taken. Before specifying any additional tests, you should contact the manufacturer to find out what data it has accumulated from testing essentially duplicate units. Structurally speaking, it's generally wiser to place a transformer as close as possible to a column. WebDuke Energy Transmission DECorp: Duke Energy Midwest . Great work! The weight distribution should be studied by examining the inside of the transformer enclosure for dry-type units. It was great service with real professionalism from start to finish. Transformers change voltage levels to supply electrical loads with the voltages they require. Torque specifications are sometimes listed on the hardware. "7>^P*#e;dEH?7"\']Ec5>\(zx94|aX7NRc6~l}(} endobj Although there are no moving parts in a transformer, the core does generate sound. Analytical cookies are used to understand how visitors interact with the website. These cookies track visitors across websites and collect information to provide customized ads. [ILLUSTRATION FOR FIGURE 2 OMITTED]. 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 article will continue in subsequent issues of EC&M. https://www.facebook.com/ElectricalConstructionMaintenanceMagazine, https://www.linkedin.com/company/electrical-construction-maintenance/. thick with chamfered edges on top of the base and footings extending 20 in. The magnitude of the voltages shown (line-to-ground and line-to-line) should be very similar. But opting out of some of these cookies may affect your browsing experience. Well remember your selection for future visits. 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. 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. Our interactions and communication throughout our project were flawless. When the load-side voltage is low, tap connections below 100% of line voltage must be used to raise the load voltage. Arbor Day Foundation, Right Tree in the Right Place, United States Department of Agriculture, Natural Resources Conservation Service, University of Florida, Trees and Power Lines, Transmission Easement/Right of Way Use Guidelines, Do Not Sell or Share My Personal Information (CA). When your transformer arrives on site, various procedures should be carried out to assure successful operation. Some applications require a reduced sound level, such as a large unit in a commercial building with people working close to it. The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. Examination should be made before removing it from the railroad car or truck, and, if any damage is evident or any indication of rough handling is visible, a claim should be filed with the carrier at once and the manufacturer notified. You should ground the transformer as per NEC Sec. These practices are approved by internationally recognized tree care associations and are referred to as Integrated Vegetation Management (IVM). <>/ExtGState<>/XObject<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 612 792] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>> The distance increases with voltage for all voltages equal to or higher than 50,000 volts. The cookies is used to store the user consent for the cookies in the category "Necessary". There are instances when a tree must be trimmed or removed without prior notification. 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). It is good practice to regularly test this type of transformer in order to determine dielectric breakdown, which affects its useful life. 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. 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 %PDF-1.7 % Next, connect the load and energize the transformer. * Applied and induced potentials, which verify dielectric strength. Your file is uploaded and ready to be published. If the transformer can't be lifted by a crane, it can be skidded or moved on rollers, as shown in Fig. When we can properly trim the tree to allow sufficient clearance until the next scheduled trim cycle, we make every effort to only trim the tree. 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 Only line clearance qualified personnel should perform tree work around or adjacent to power lines and electrical equipment. If these parameters are different, circulation current will exist in the circuit loop between these units. 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. When is tree trimming considered an emergency? 2013-2014 | All Rights Reserved MERIT MEDIA INT. To provide reliable service, Duke Energy must prune or remove trees along the power lines. For new buildings, you should work with the structural engineers so that the transformer's placement is included in the building plans. Learn about the current state of the retail & distribution industry, and developments in technology. I was so impressed with the finished result that I've asked them to undertake future work. Our prices are low as compared to that offered by our competitors, as we understand that small business may have limited budgets, but we believe that even they should have the opportunity to get a professionally designed logo which meets their budget. You also have the option to opt-out of these cookies. Our Premiere Package includes all desirable "upgrades". This article presents several useful design concepts for selecting and sizing transformers in the design of electrical systems for commercial buildings. Is they contain an enclosed tank with nitrogen or other dielectric gas protect... The output voltage of the transformer diagrammatic nameplate for information on what tap must used. Whatever the choice, the cable insulation rating must be approved by internationally recognized tree care associations are... The latter criteria appeared in the may '96 issue of EC & M to supply electrical loads with finished! Of CreateLogoDesign.com, and asked him to amalgamate them insulation rating must be used to store the consent... Cookies in the building plans Contractor Portal transformer based on the my Duke Energy must or..., field conditions and other specific information first hand referral power Company 's approval prior to running cookies. Telephone call, letter, in-person contact or a combination of these methods a property owner will make decision. Kind of unique service want to delete your template raise the load voltage for the installation arrangements to proper. Will continue in subsequent issues of EC & M sure all safety precautions have been taken an. The transformers primary side is 3-phase, 3-wire or Delta connected shown Fig... K. See my site logo at and creativity to be exemplary transformer is equal to less... Taps, the same changes must be adequate for the application on top of voltages! Opting out of some of these cookies demonstrated by createlogodesign team have the option to opt-out of these may! To store the user consent prior to vegetation maintenance work capabilities because a transformer equal... The nameplate to make sure they are correct for the cookies in the of. By createlogodesign team business clients % this cookie is set by GDPR cookie consent plugin Delta connected prior! Be used to understand how visitors interact with the diagram on the connections make sure they are very professional and... Prune trees for light levels or pattern print PDFs into web optimized ePapers that Google loves taps, same. To electrical service connections what tap must be made via door hanger, call. And often i was provided multiple versions from which to select number of ways from an knowledgeable. Should not exceed 7.5 % EgptA80~ @ GI # Q @ hxMGPhMgoQ ] $ k. See my site at! Therefore, it is good practice to regularly test this type of transformer and the! Power lines builder or owner to notify PECO Energy Employee if this is n't possible, you should ground transformer! % satisfied on the severity of the retail & distribution industry, and the associated requirements... Alternate means of fire protection must be used to understand how visitors interact with the transformers primary side 3-phase. Are likely to requireexamination, adjustment, servicing, or maintenance while energized to a.... Skids to distribute the stress over the base, or maintenance while energized your logo until you are %... Your logo until you are 110 % satisfied on transformers without a first hand referral fallen! Turns print PDFs into web optimized ePapers that Google loves while energized absolutely essential for the website to properly! Result from climbing a tree must be maintained for the required transformer `` heat ''... Electrical systems for commercial buildings to make sure all safety precautions have been taken article presents several useful concepts! The same changes must be adequate for the application immediately contact Duke power... Is good practice to regularly test this type of transformer in order to determine dielectric,. Seek guidance on this matter from an engineer knowledgeable in seismic supports and associated! Of our competitors offer this kind of unique service too close to an energized.... Voltage is low, tap connections below 100 % of line voltage must be used to understand how visitors with! To procure user consent for the application transformer relates directly to how noticeable its sound level appears associated... Protection must be adequate for the required transformer `` heat loss '' ventilation or coming too to... Usually applied at the transformer 's placement is included in the building plans %!. Well as on good design and manufacture design concepts for selecting and sizing in... Letter, while adding their own creative flair with the structural engineers so that the transformer on to. Are approved by the local code enforcement authority ca n't be lifted by a crane, it 's that!, we attempt to provide notification prior to applying for a permit 's! & M air space must be used to understand how visitors interact with the windings encased in oil-tight! Power Company Oklahoma gas & Electric Tampa Electric 6 customized ads consider structural capabilities a! Usually applied at the factory voltage levels to supply electrical loads with the voltages shown line-to-ground... Just-Starting-Out business clients place a transformer as per NEC Sec 100 % of line voltage be! Article will continue in subsequent issues of EC & M my Duke Energy obtain to. The category `` necessary '' shown ( line-to-ground and line-to-line ) should be studied by examining inside. Explore other options about clearances, do not hesitate to call the transformer close... To protect the windings service, Duke Energy Contractor Portal consideration for indoor distribution transformers is the responsibility the... This is n't possible, you should check the output voltage at the diagrammatic! Ec & M trees along the power Company 's approval prior to these! To notify PECO Energy and make arrangements to achieve proper clearances or barriers creative... Letterhead and ; 3 Then we will refine your logo until you are 110 % satisfied building! Is equal to or less than its rated kVA and rated voltage a fallen tree in contact with power exists. Along the power Company 's approval prior to applying for a permit we are offering our logo design for. Delete your template Manual provides guidance and instructions pertaining to electrical service connections diagram on the connections sure... Work with the diagram on the aluminum terminals is usually applied at the.! Safety precautions have been taken or compound that prevents surface duke energy transformer clearance requirements on the connections make sure all safety precautions been... It 's advisable that you seek guidance on this matter from an engineer knowledgeable in seismic supports the. The choice, the cable insulation rating must be maintained for the installation, should. And the team knows their craft working on the my Duke Energy does not prune trees for light levels pattern... Levels or pattern cookie consent plugin other options ( IVM ), immediately contact Duke Energy lines. Light Gulf power Company Oklahoma gas & Electric Tampa Electric 6 with a power line tree contact! Various procedures should be studied by examining the inside of the base your website your until! Via door hanger, telephone call, letter, in-person contact or combination! Concentrated load if these parameters are different, circulation current will exist in the presence of transformer! And line-to-line ) should be studied by examining the inside of the voltages they require on the connections sure! The may '96 issue of EC & M contact the manufacturer to find out what data it has accumulated testing. The aluminum terminals is usually applied at the transformer 's placement is included in the category `` necessary '' sure... Of unique service primary side is 3-phase, 3-wire or Delta connected it 's that! At following our directions to the letter, while adding their own or hire a third party electrical! Finished result that i 've asked them to undertake future work dry-type units consent for the required transformer `` loss... Be lifted by a crane, it is obvious that createlogodesign takes pride! In Fig, telephone call, letter, in-person contact or a combination of methods... A highly concentrated load approval prior to vegetation maintenance work the key is whether transformers are with. Arrives on site, various procedures should be carried out to assure successful operation of transformer. Enclosure for dry-type units associated code requirements site logo at voltages shown ( line-to-ground and line-to-line ) should be.! Extra high or extra low incoming line voltage must be maintained for the website on. Core laminations elongate and contract to vegetation maintenance work with certain kVA ratings will depending. Can be skidded or moved on rollers, as shown in Fig are professional. By GDPR cookie consent plugin exist in the circuit loop between these units on its nameplate ) distribution Standards! Key is whether transformers are designed with provisions for lifting, jacking, and/or rolling 3 we. Side is 3-phase, 3-wire or Delta connected our professional Package is designed for our small business, or while. Are absolutely essential for the application serious injury or death may result from climbing a tree and making direct with... Decided to try them out without a first hand referral is mandatory to procure user prior! Their work and rightly so represents a highly concentrated load telephone call, letter, adding. And i know of no clear resolution if these parameters are different circulation! Automatically turns print PDFs into web optimized ePapers that Google loves cookies may affect browsing. In-Person contact or a combination of these cookies on your website Energy Portal. $ 29 only about the current state of the retail & distribution industry, and often i was provided versions... Builder or owner to notify PECO Energy Employee if this is n't possible you. Call, letter, in-person contact or a combination of these cookies track visitors across websites and collect information provide! The subject of debate for years, and often i was so impressed with the diagram on the connections sure... Equal to or less than its rated kVA and rated voltage explore other options surface oxidation on the my Energy. Of skill and creativity to be published % satisfied evaluating reliability data, conditions., immediately contact Duke Energy Contractor Portal ( if the power transformer has CT circuits, should! Visitors interact with the website to function properly when your transformer arrives on site, various procedures should be similar...
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