Age initiative frequently asked questions pdf aboveground equipment aesthetics improvement manual aim pdf the following landscaping brochures have been created to provide sce customers with information and guidelines to aesthetically screen pad mounted transformers and other distribution pad mounted equipment in nonsce facilities. What is dtr structure, materials used in dtr structure. Pole mounted distribution transformer substation dt ss. A substation is a part of an electrical generation, transmission, and.
The customer will design, build, own, and maintain the complete primary installation except line breakers or any switchgear that is part of the dte system. Make sure to include all details andor any additional documentation, such as section, page number and illustrations. A 50 hz electrical substation in melbourne, australia. Transform, connect and protect mediumvoltage electrical distribution products commercial and industrial cope power. Modern transformers are designed to closer tolerances than transformers in the past.
Threephase, padmounted distribution transformers for underground service gei79025m instructions. The following layout designs of indoor distribution substation are typical only and should not be used as construction drawings as they are presented as an. The outdoor substations are mainly classified into two types, namely pole mounted substation and foundation mounted substations. Such type of substation requires less time for construction but uses more space. Technical specification construction of 3311 kv primary sub. K substation standards switch operating and equipment platforms electrical design and details 20. This bulletin is an update and revision of previous rea bulletin 651, design guide for rural substations revised june 1978.
From our experience we will be able to advise you the most suitable form of pole mounted substation, from the material requirements to the foundation and protection requirements for. Other substations in the area influence the design of a new substation. Substation maintenance i substation maintenance ii when registering use promo code. Vantran industries transformer manufacturing company. One off designs from substation to substation suite of structures long spans typically 300 metres and longer. Pole structures for mounting dtrs are normally not secured by protective fencing and can become a hazard if someone climbs. Transformer vault placement and space requirements whether youre constructing a new building or adding electric load to an existing one, con edison strongly encourages you to contact us early in the design process to discuss your transformer vault requirements. For consumer consumption various stepdown transformers and. The following current and former members of the substation subcommittee of.
Pole crossarms only need to be earthed where the other plantequipment installed on the pole requires earthing. Thus, effective, regular maintenance and testing is even more essential to. Primary and secondary electrical distribution systems. May 15, 2018 pole mounted substation are mainly distribution substation constructed on two pole, four pole and sometime six or more poles structures. Wall mounted brackets supporting overhead lines do not have to be earthed. Chan encyclopedia of life support systems eolss remote. Threephase pad mounted transformers are used for commercial installations, as illustrated in fig. Generally, dte will design, build, own, operate, and maintain any associated high voltage substation and high voltage lines feeding the substation except for those. Electric service standards date 1127 18 prepared by subject.
This document outlines the primary design standard for transgrid substations. The unified facilities criteria ufc system is prescribed by milstd 3007 and provides planning, design, construction, sustainment, restoration, and modernization criteria, and applies. Introduction estimating is defined as a method by which we. Surge arresters or lightning arresters discharge the over voltage surges to earth and protect the equipment insulation from switching surges and lightning surges. This is showing three of the five 220 kv66 kv transformers, as well as highvoltage transformer fire barriers, each with a capacity of 150 mva. November this offer can only be applied to courses registered after october 17, 2017 and.
The customer must provide minimum working clearances as shown in crs 619100. Transmission lines are those highvoltage power lines that run from power plants to substations, or from substation to substation. Singlephase pole type transformers prolec ge designs and manufactures a complete line of singlephase pole type distribution transformers for installation on utility overhead systems. The customers switchgear and metering cabinet design must be approved by the. Mounting and handling of current and voltage transformers. Distribution substations may also be the points of voltage regulation, although on long.
Ultimate strength for pole is 39 kn for wood pole and 30 kn for steel pole. Ns122 pole mounted substation site selection and construction. The customers switchgear and metering cabinet design must be approved by the ppl eu engineer before units are built. D substation standards lighting fixture pole and bracket mounting 19. Important formulas for designing a substation grid earthing system. This chapter presents general information concerning the design of the substation physical arrangement. Designs submitted shall be declared as fit for purpose. Design standard electric operations organization d3820 rev 0 page 1 of 34 construction, material, and work specifications for new 1525kv primary. This manual outlines the standard energex distribution earthing practices for low voltage and 11kv systems and includes. Oct 11, 2012 electric substations are the part of the power system and used for transferring power from generating points to load centers. Unesco eolss sample chapters electrical engineering vol. Transformer vault placement and space requirements whether youre constructing a new building or adding electric load to an existing one, con edison strongly encourages you to con. The ergon energy design philosophy is to provide substations.
As you can see, the overview is complex, but on the other hand the mvlv electrical substation is the synthesis of several design activities electrical, mechanical, construction. Some of the important components of substation are. Pad mounted 5% less than substation design dry type transformers vacuum pressure impregnated 1. Distribution lines are those lines that run from a substation to the consumer via pole mounted transformers or the like. Electricity network safety management system manual. Typical pad mounted transformer requirements include, but are not limited to the following. Landing gantries and poles shall allow for future rearrangement, as follows. Wood pole substations are inexpensive, and can easily use wire bus structures. In these type of substation fuse protected distribution transformer are mounted on poles along with electrical isolator switches. How we can ground the power distribution systems and substations.
We utilize stateoftheart technology in our design and. A safety program must be established, verified and followed by all personnel involved with the transformer. Kenya power transmission system improvement project lot 3233 kv substations and switching stations volume 2 section vi employers requirements. I would agree that a pole mounted transformer is, strictly speaking, a substation but would generally be called a pole mounted transformer. Scholar, electrical and electronics engineering department, aisect university bhopal, mp, india. An external fusecutout combination is mounted between the distribution primary and the conventional transformer. Technical specification construction of 3311 kv primary. Standard for electric installation and use xcel energy. These two type of mounting of dt substation are discussed as below. This bulletin provides a basic design guide and a reference tool. Service connectors the customers contractor must provide connectors at thecustomers switchgear for the size and number of aluminum cables. This offer cannot be used towards courses already purchased or added to any other existing discounts.
This substation is constructed using steel lattice structures to support strain bus wires and apparatus. The power will be provided by connecting the factory to 33 kv mv voltage level. Prepare the estimate and cost of the materials for a 4 pole mounted. K substation standards switch operating and equipment platforms electrical design and. What is dtr structure, materials used in dtr structure, double pole distribution transformer hello guys, welcome back to my blog, in this article i will discuss about materials which are used in double pole distribution transformer. How we can ground the power distribution systems and. Westinghouse electric corporation, electrical transmission and distribution reference book. Earthing system is made of a mesh of buried bare copper cable, with additional earth rods, and shall be calculated, being recommended to use ieee std. Distribution substations michigan technological university. The manual is applicable for all substation projects regardless of internalexternal design delivery mode. Design of earthing grounding system in a substation grid. Hello guys, welcome back to my blog, in this article i will discuss materials that are used in a double pole distribution transformer, what is a dtr structure, what is distribution.
Wall mounted brackets supporting overhead lines do not have to be earthed if the line is connected to the bracket by an insulator and the part of the line in contact with the insulator is itself insulated. Padmounted distribution transformers introduction 2 the equipment covered by. Guidelines for substation and power distribution systems. Meters emwp polemounted primary metering installation, 12 or 21 kv line 058779 page 2 of 8 rev. The substation design manual is not intended to replace asset management standards, but rather to act as a reference document that crossreferences existing standards and process documentation and plugs any gaps where asset management documentation does not exist. Prepare the estimate and cost of the materials for erecting a 2 pole mounted distribution substation 4. Most utility power companies treat transmission and distribution lines as separate entities. Technical guide the mvlv transformer substations abb group. Which is located in phidim municipality, panchthar district is the result of nepal electricity authority. Overhead design and construction fundamentals presenter. I would agree that a polemounted transformer is, strictly speaking, a substation but would generally be called a polemounted transformer. What one company or customer calls a substation may not be what another company or customer defines as a substation. Transmission lines are those highvoltage power lines that run from power plants to.
As you can see, the overview is complex, but on the other hand the mvlv. Electrical4u is dedicated to the teaching and sharing of. Handbook on construction techniques asian development bank. Distribution earthing manual page 1 of 65 this document is uncontrolled if printed or saved. Consider that you would like to choose a transformer to supply power to a factory which requires maximum of 270 kva of power at 400 v on the lv side and no expension is considered for near future. Company of colorado and southwestern public service company, xcel energy companies.
Medium voltage products technical guide the mvlv transformer. Similarly, a pad mounted transformer in an urban area fed from a reticulation or distribution feeder is a substation but is often described as a minisub. Ges fast cycle voltage regulator vrfc is a new edition to ges portfolio of polemounted voltage regulators and is based on the most popular utility configurations. Abstract the thesis deals with the analysis of construction of power lines and substation switchyard of 3311 kv. Basics, maintenance, and diagnostics vii contents continued page 4. Singlephase poletype transformers ge grid solutions. A substation is a part of an electrical generation, transmission, and distribution system. Pad mounted transformers are used with underground systems. The substation design manual is not intended to replace asset management standards, but rather. Without a specific design, it is also difficult to be precise about construction time but both kaffenes and kirslis agreed skid mounted assemblies save time. Outdoor substation a substation which is used for all voltage levels between 55 kv to 765 kv is called outdoor substation. It describes various types of substations, illustrates typical layouts, and presents.
Transformer installation, operation, and maintenance manual. Kuhlman electric corporation keys to success introduction this catalog is designed to provide basic information on the various transformers manufactured by kuhlman electric corporation. Busbars receive power from incoming circuits and deliver power to outgoing circuits. Calling pole mounted transformers a substation is a matter of semantics. November this offer can only be applied to courses registered after october 17, 2017 and attended on or before november 30, 2017. Abb offers a complete range of distribution transformers designed to grant the reliability, durability, and efficiency required in utility, industrial, and commercial applications. Substations transform voltage from high to low, or the reverse, or perform any of several other. Customer substation manual 6272019 preface page 8 of 82 010.
Vantran is a transformer manufacturing company in waco, tx that offers a wide range of highquality, liquidfilled transformers. The manual is applicable for all substation projects. Various incoming and outgoing circuits are connected to busbars. Horizontally mounted doublebreak switch with grounding switch. These highly reliable transformers are available in a wide variety of ratings and accessory combinations. The cross section of the buried cable should calculated in accordance with the value of the phasetoearth short.
It is usually of the three pole, singlethrow, groupoperated type. Typical layout of a substation linkedin slideshare. D substation standards ground cable on tubular steel structures support details 21. Placement of the pts and cts on the cluster bracket can be interchanged to suit the job application.
Estimating of a pole mounted substation prepared by. One off designs from substation to substation suite of. Foreword scope this manual outlines the standard energex distribution earthing practices for low voltage and 11kv systems. The key diagram of this substation can be explained. Placement of the pts and cts on the cluster bracket can be. Distribution automation handbook prototype elements of power d istribution systems 1mrs757959 4 3 elements of power distribution systems 3. Design guide for rural substations usda rural development. Ns122 pole mounted substation construction ausgrid. Reclosers are a small pole mounted circuit breaker that can contain. Such type of substation requires less time for construction but uses.
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