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