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1. TECHNOLOGY DRIVEN SOLUTIONS. • Power cable sizing & in-ground duct design. m. This document provides calculations for the earthing design of a 110. It outlines the purpose, codes and standards, sizing criteria, formulas used, and sample calculations to determine the height and protective radius of lightning masts for the substation. Volume IX, Substation Structures. Consultants of Substation Design Services - Design of 132 KV Outdoor Switch Yard Substations, 33kV Switchyard Design and Drawings, 400 kV Outdoor Switch Yard Substations Design and 330kV Switchyard Design and Drawings offered by Satcon(Prop Satyaki Mukherjee), North 24 Parganas, West Bengal. Aug 19, 2023 · BS7354 -1990 Code of Practice for Design of High Voltage Open Terminal Stations. The IEEE Std 80-2013 proposes various refinement methods that Calculation of fault levels and relay settings. The term switchyard is generally applied to the assemblage of switches, power circuit breakers, buses, and auxiliary equipment that is used to collect power from the generators of a power plant and distribute it to the transmission lines at a load point. • Lightning protection (air terminations & OHEW). Volume II, Physical Layout. The lower secondary current CT-like -/1 secondary is suitable for switchyard applications. The resultant shielding might not protect the objects for strike currents I2 < I1 with a shorter striking distance, but will likely guard the items for strike currents I3 > I1 with a more considerable striking distance. discussion on the calculation methodology, conductor materials, fittings and accessories, other ampacity considerations, and the risk associated with wind speeds which are different than those that are assumed for the calculations. All material cost is populated. Box 47936-00100 GPO Nairobi, Nov 9, 2017 · 3. What do you need to know about designing a switchyard? Well, to simplify, you need a lot and it’s not that simple. It's free to sign up and bid on jobs. 3 Structural design 2. In the switchyard or substation, buses are open to the air. Design calculation for number of sprinklers around the Power transformer. Sag NESC minimum requirements PLUS an additional 2 ft The calculator outputs the maximum possible distance between the masts (L max) so that the height Y can be the maximum height for the equipment to be protected anywhere between the mast and the fence (Y max). 1801 Alexander Bell Drive. Central Electricity Authority - CEA Design calculations and drawings for air conditioning and ventilation systems Bill of materials for cables, cable trays, racks, earthing, lightning protection and lighting systems Short circuit force calculation for strung bus and rigid tubular bus Sag and tension calculation Fault level calculation by ETAP CT & VT sizing calculations LT, HT and Communication Cable Sizing Calculations; LT, HT and Communication Cable Schedule; Auxiliary Single Line Diagram for Inverter, MCR and Switchyard; Auxiliary Trafo, Battery and UPS Sizing Calculation; MCR, Switchyard, Inverter Transformer Yard Earthing Calculation; Design of MCR, Switchyard, Inverter Transformer Yard Earthing Layout cables, neutral conductors, foundations, and earth wells [1]. Key calculations include busbar sizing, short circuit, earthing, lighting protection, and transformer sizing. The paper therefore proposes a suitable grounding system design that accords with the relevant IEEE Standards and International best practices. Covers general issues related to site design, foundation design and control house design. Agenda. Fire detection systems. 31 Ohm mtr. Rotating loads like induction motors are integrated as well. IEEE Standard 80-2000- Guidelines for AC substation grounding. If the user does not specify the distance, the calculator takes L max as the distance between the mast and the fence. Electrical layout design which includes: Positioning of equipment; Bus design; Design of manhole and conduit system; Design of auxiliary A. . 18. 3. It includes: 1) Design of the main earthing grid with a 70m x 30m layout and 32mm copper conductor. • Earth grid design and step/touch potential calculations. : TB-371-510-102 Rev-00 1. Break 5. 1 Design Data for Design of Switchyard Structures Design Loads i) Wind Pressure on Structures (Refer table 8. Grounding Design Variables – Soil model variables – Seasonal modelling of soil – Crushed rock resistivity – Fault current design margin – Fault clearing time – Summary / Combined effect. 5% (or 0. When a short-circuit occurs – generators pump current into the fault. Emergency generators. It determines that the C12. The usual arrangement of connections in most substations permits working on almost any piece of equipment without interruption to incoming or outgoing feeders. Nov 20, 2020 · Finally, several sensitivity studies were conducted so as to optimize the BHP switchyard grid design ensuring safe grid operation. Simple systems lend themselves to manual evaluation of fault currents while complex systems need computer software tools for calculating fault currents. The basic layout diagram of the substation switchyard shown in Figure 1 illustrates the most common configuration of a typical step-down Air-Insulated substation for sub-transmission and primary distribution in load centers. The number and design of portal structures is governed by the overall length of the installation. Advance Electrical Design and Engineering Institute (AEDEI)is India’s No. 31. Characteristic curves are generated plotting View MEL-0058-OLK1-CV-002. Razvig, IEC 62305-2 | DSLP Calcu We offer design engineering services incorporating Pre-Engineering Plan sets for transforming into the Conceptual Plan sets to ensure our technical approach will meet the necessary relevant local and International Standards with respect to equipment’s selection, Electrical & Civil design and Safety aspects. Using the results of this calculation, you can: Determine the minimum size of the earthing conductors required for the main earth grid Ensure that the earthing design is appropriate to prevent dangerous step and touch potentials (if this is necessary) When to do the What does this spreadsheet do? Program is designed as per ANSI/IEEE 80 Code, it calculates step potential of switchyard, touch potential of switchyard, total length of earthing mat conductor, size of earthing mat conductor and total number of earthing rods. ) • Voltage limits (permissible voltage drop, etc. Reston, VA 20191-4400. 5-1550 insulator, with a manufacturer-rated cantilever strength of 1250 daN, can safely support the main bus conductor with a required strength of 995. 1104220026) Under the Guidance Of Santosh kumari Department Of Electrical Engineering Madan Mohan Malaviya University of Technology, Gorakhpur, U. DC tripping system and battery banks/chargers. Box 47936-00100 Oct 18, 2014 · 1. To get this value on our 40 MVA base, we just multiply by the ratio of the two bases, resulting in an impedance of = 0. (CC BY-NC-ND 3. 2, equation 57 and essentially combines the resistive properties of a metal plate, conductors and the depth at which it is buried. It requires the designer to know a large number of design standards, safety requirements for the switchgear and standard design decisions. Mar 20, 2020 · 4. Provided design steps can give safe design of electrical substation earthing grid with accuracy. power system; Selection of D. (4)-G77700-S0019-L061-A Project: MESNET IZALATORU MEKANIK HESAPLAR Gilgel Gibe – II PROJECT ETHIOPIA Description: 400 kV SWITCHYARD DESIGN REPORT’s & CALCULATION’s Subject: Report on Calculations for Determination of Cantilever Strength of Bus Post Insulators Note: This report establishes the sizing of bus post insulators for 400kV switchyard on the basis of cantilever strength. Varganova, and N. Volume X, Grounding. This Zoe training course will also provide you with a mastery in the fundamentals of electrical substations and switchyard design. The design of the grounding system in this project is heavily referenced to Institute of Electrical and Design of substation earthing grid can be done reliably and easily with design steps given as per flow chart of Fig. ITER Electrical Design Handbook Earthing and Lightning Protection This work is licensed under the Creative Commons Attribution-Noncommercial-NoDerivs 3. From design steps, it can be observed that soil resistivity affects the step and touch voltage. The CTs are available in -/5 and -/1 secondary current. Transformer is the heaviest equipment in the switchyard. Layout of switchyard may be generally designed in accordance with Central Board of irrigation and power manual on SubStation layout for 36 kV and above. Proposed Revisions Reclamation designers should inform the Technical Service Center, via Reclamation’s Design Standards Web site notification procedure, of any recommended updates or changes to Reclamation design standards to meet current and/or improved design practices. Earthing System Calculation Page 9 The safe touch and step voltages to be used for verification of grounding design is calculated using MALT engineering module of CDEGS computer program. The outdoor switchyard design is one of the most time-consuming stage of electric substation engineering. AUXILIARY SYSTEMS. The base box is filled with dried mineral oil, protecting the components from environmental deterioration. 5 Technical specifications for Hydro Mechanical Works Electro Mechanical works 3. areva t & d india ltd. In large substations, arrestors should be installed at take-off points of the lines and of the terminal apparatus. design ground clearance at Max. – motors (which store energy in the magnetic field) backfeed into the fault. Covers the design of bus support structures and connectors. ), fault current MV Switchgear Design & Applications. The paper presents a switchyard earthing design analysis of a 33kV distribution switchyard using the IEEE-80 Guide for Substation Earthing and Finite Element Method based simulations. This report calculates the cantilever strength required for bus post insulators supporting the main bus and equipment bus at a 400kV substation in Ethiopia. It needs an elaborate design calculation to decide the concrete foundation for it. Jul 10, 2019 · Design and electrical calculations for 110(220)/35/10 kV power substation Premium Membership Get access to premium HV/MV/LV technical articles, advanced electrical engineering guides, papers, and much more! The equation is based on the IEEE Guide for Safety in AC Substation Grounding (IEEE Std 80-2013), section 14. In professional field proper lighting design is very important because an under lighting arrangement will decrease the efficiency of the task for which the lightings were designed and an over lighting arrangement will result in over expenditure of the company. 2 Design case of a typical substation. Hence, the problems related to ground grid construction and design should be addressed. Volume I, Design Parameters. 2) Calculations of tolerable touch voltage of 736. Search for jobs related to Switchyard design calculation or hire on the world's largest freelancing marketplace with 24m+ jobs. 95V and step voltage of 2455. This technical article explains various aspects of the application of medium voltage switchgear and highlights the considerations for the selection of suitable circuit breakers for different applications. EATS 41-24- Guidelines for the design, installation, testing, and maintenance of main earthing stations in substations. May 29, 2023 · Complete Electrical Substation illustration Design as per Standard | Lighting Design Calculation | Class 16 | Part 2In this video, we will discuss the comple Consultants of Consultancy & Design Engineering of EHV Electrical - Outdoor Cable Trench Layout of EHV Substations, Switchyard Design Services, Detail Engineering & Drawings Services for High Voltage Electrical Projects and Basic Engineering Services offered by Satcon(Prop Satyaki Mukherjee), North 24 Parganas, West Bengal. • Equipment and bus clearances. Is to be considered as 1 Sec. It also finds that the C6-1550 insulator, rated at Nov 8, 2018 · Design for 33/11 kV power substation, distribution and protection in city of Nairobi – Cyrus Kariuki Kamau At University Of Nairobi Faculty Of Engineering Department Of Electrical And Information Engineering: Format: PDF: Size: 7. 2) System data including 400kV nominal voltage, 50Hz frequency, 1425kV impulse withstand voltage. Key Components of a Switchyard: Switchyard Equipment in a Nutshell. See full list on electrical-engineering-portal. • Busbar systems – rigid and flexible. 703-295-6300 | 800-548-2723 i. based on reliability requirements. Fault level calculation CT & VT sizing calculations Battery and battery charger sizing calculations Vendor drawing review Civil drawings and calculations for foundations, cable trenches, culverts, drains, control bldg. 0 IGO) You are free to share this work (copy, distribute and transmit) under the following conditions: you must give credit to the ITER Organization, include exceptions to requirements of national codes and design standards. 5 according to IEEE 80-2000. Moreover Transformer being an oil containing equipment, needs a oil collection chamber to hold leaked oil. Mar 14, 2012 · The earthing calculation aids in the proper design of the earthing system. , coming up in predominantly residential communities) and new developments in unoccupied green Dec 25, 2018 · The electricity substation is a network of electrical equipment which is connected in a structured way in order to supply electricity to end consumers. :-MEL-0058-OLK1-CV-025 KENYA ELECTRICITY GENERATING COMPANY (KENGEN) Stima Plaza Kolobot Road Parklands P. Duration of Fault : For Earth Mat Design for HV S/Stn. Design of Capacitor Voltage Transformer. A. Design calculations and layout / schematic drawings, BOQ and technical specifications for Air conditioning, Ventilation, firefighting systems. The total length of the Aug 1, 2019 · Safe and reliable grid design is complicated by the compact design of gas insulated substations (GIS). Preparation of structural GA drawings for switchyard gantry/beam/equipment support structures. 2 Selection of Generator 3. Mechanical System Engineering. 5 kA 4. batteries and battery chargers; Layout of control house; Grounding and lightning protection design Electrical Power System Design Course (An Award Winning Training Institute for Online Substation Design Training course) MODULE1- ELECTRICAL SOFTWARES Electrical Fault Current/short circuit current calculation, Electrical load flow analysis, Protection relay coordination, Motor starting analysis by ETAP Auto-cad Software for electrical drawing preparation DIALUX software for Lighting 8. The design should consider safety both within and outside the substation fence, as well as protecting all HV plant and equipment from damage, during fault conditions. ) • System safety • System flexibility • System reliability • System earthing With the use of the Transcend Design Generator, an electrical engineer can leverage the power of generative design to evaluate various options for substation components. May 20, 2023 · The design of a compliant, safe, and reliable substation earth grid is not a straightforward process; in most cases, it requires some additional measures to be taken due to various constraints that differ from environment to environment, such as soil resistivity, a high fault level, a limited surface area, construction budget, etc. 1725 = 17. T. 5 (ii) Fault duration (second) (for conductor sizing calculation of main earth grid) 1. Oct 4, 2022 · Many electric utilities have a preference for certain arrangements which they have adopted as standard. com We will discuss the calculation of fault levels in a later chapter in detail. The technical specifications (or tender specifications) for each individual piece of equipment are laid forth. Rural electrification standard be adopted for 12 kV substations. 3 Selection of Switchyard Volume VIII, Site and Foundation Design. • Insulation coordination. The base box contains the intermediate transformer which will provide the final output voltages via multiple tapped secondary windings, series compensating reactor and Ferro-resonance control circuitry. 105 pu ) on a 24 MVA base, we can calculate the impedance of the current limiting reactor as at 24 MVA. However, this guide does not provide any guidance on the seismic design of bus structures, Jun 25, 2019 · Why conduct short-circuit study? Hundreds, if not thousands, of generators are tied to the power grid. Panova(&), A. 5 MW plant 87 This manual is provided for the use of all Departments of the ITER Organization and is addressed to system specifiers, designers and users of electrical components in otherwise non-electrical plant systems. This technical article describes detailed planning and design phases of a new 220 kV Gas-Insulated Switchyard (GIS) in a 450 megawatt (MW) coal-fired combined heat and power plant (CHP) that was being considered for Ulaanbataar, Mongolia. INDEX TERMS -Clearances, Equipment’s Ratings, SLD (Single Line Diagram), Plan Layout, Section Elevation Layout, Earthing Grid, Earthing Grid Design, DSLP (Direct Stroke Lightning Protection), DSLP Design, OPGW Cable, Distribution Substation and Substation Design 1. Based on these calculations, the engineer can specify the bus size, the forces acting on the bus structure, the number of mounting structures required, and the hardware requirements. Selection of earthgrid spacing, calculation of - conductor and equipment risers, use and length of earth rods, gravel or bitumen surfacing and any other Civil/structural design calculations are made using STAAD software. 0 This document provides the direct stroke lightning protection calculations for the 400/220/33kV Indrapuram Substation. Volume XI, Protective Relaying Moreover, the protection settings for the capacitor bank unfold systematically, elucidating the process of selecting the current transformer ratio, calculating rated and maximum overload currents, and determining the percentage impedance for fault MVA calculations. (2) (PDF) Comprehensive Design of an Earthing System for Doc: CT,CVT EMVT DESIGN CALCULATIONS FOR 220KV 66KV SWITCHYARD FOR HEP-II BHEL Document No. ru Abstract. If you are familiar with these parameters, then check out the below infographic, showing how to pick their values. (transformer plant) at kotambi, vadodra earthing system design calculations electrical consultant: sn consultants b-246a, greater kailash part one new delhi 110 048 ph. Earthing: The switchyard fence earthing practices are possibleand are used by different utilities. Approved static and OPGW wire sizes for NEW Construction By design. 2 Utility system The data requirements may differ somewhat with utility systems. For a start, it’s important to prepare a single line diagram of the electrical power supply and distribution network, clearly indicating all the significant network elements (power supply sources, transformers, electric motors, etc. The spacing of the branches is determined by the switchyard configuration. Maximum Symmetrical Fault current : 86. 05 tc s 50 STEP 2 5 CONDUCTOR SIZE Symmetrical fault current 6 Duration of fault Design of substation earthing grid can be done reliably and easily with design steps given as per flow chart of Fig. 4. 005 T. Sep 25, 2023 · The art of the transmission switchyard design: The physical layout engineering (Case study included) Earthing system for a complex project: Analysis, calculation and installation (XLSX, DWG) Design Knowhow: Low voltage substation layouts, earthing, fire protection and tests At this stage a preliminary design can be determined. 120 mm thick layer of crushed rock is spread on the earth’s surface above ground grid in the switchyard to increase the contact resistance between the soil and the feet of the personnel in the substation. In the Appendix 7 the computer printouts are presented. 132-33 kV substation single line diagram Starting from the generating stations to the end users, voltage is needed to be stepped up and down several times in various substations. Design Calculation are based on IEEE80-2000. 4 Electrical Substation and Switchyard Design 1. Design calculation for sizing of the Fire fighting pump rating. 2. b. Using Primary data like area to be earthed, soil resistivity, diameter of earth rod, primary calculation is done and design is finalized based on safety criteria step and touch potential. Central Public Works Department, Government of India Jul 15, 2011 · A grounding system is required for a switchyard that contains two 230/69kV step down transformers and other equipments. Feb 15, 2022 · PDF | On Feb 15, 2022, Pankaj Kumar published Calculation and Simulation of Earthing Grid Design of Combined Cycle Power Station | Find, read and cite all the research you need on ResearchGate Feb 19, 2020 · The outdoor switchyard design is one of the most time-consuming stage of electric substation engineering. Covers the layout considerations, bus configurations, and electrical clearances. The course is composed of 12 modules, covering topics such as auxiliary power requirements and performing sizing calculations for the battery backup of essential DC power supply, the requirements for site preparation, foundations, structures, cable trenches and draining arrangements to effectively coordinate with design teams of related disciplines, the designing of substation earthing to Nov 27, 2014 · 5. This article provides details on the various types of switchyard equipment, including power transformers, circuit breakers, disconnectors, and more. 1 Institute for Online Substation Design with Certified by centre government of India and ISO Certified located at center of India at New Delhi, providing Online Substation Design Training and which electrification of high voltage grid distribution and transmission in India,Pune, Sudan, Nigeria, Egypt, Bangladesh, South 1 day ago · View MEL-0058-OLK1-CV-022-CVT. 3) Conductor data for the 30. 67V. This article aims to shed some light on the so-called physical engineering activity in switchyard design with some engineering computations. The 21 st Century Substation Design Final Project Report Power Systems Engineering Research Center Empowering Minds to Engineer the Future Electric Energy System Figure 4 shows a 220 kV switchyard LPS design using a combination of air terminals mounted on standalone lightning masts (21. 5. 1 day ago · PREPARED BY CHECKED BY APPROVED BY 03-02-20 0 DGS MFK MFK PROJECT :- OLKARIA 1 ADDITIONAL UNIT 6 POWER DEVELOPMENT PROJECT – LOT 2 TITLE :- Switchyard Steel Supports Calculation- ISOLATOR DOCUMENT NO. calculation tools for each bus type. Lastly, this report includes new revised ampacity ratings for substation conductors used Jul 23, 2020 · Switchyard layout. Earthing Grid design as per IEEE80 using ETAP software. 3. O. SWITCHYARD DESIGN A Seminar Report Submitted In partial fulfilment of the requirements For the award of the degree BACHELOR OF TECHNOLOGY IN Electrical Engineering By MILIND PUNJ (Roll. This paper discusses the complete grounding design procedure for a 132-KV substation in the The main steps in substation design and engineering are as follows: Step 1 – switching system Selection of a substation switching system: ring bus, breaker-and-a-half, etc. This is an initial version of this document that has been reviewed in accordance with the ITER MQP. There are two main reasons for this option, namely, the possibility of collapse of one busbar or phase of a busbar above the others and in the dispositions (a) and (c) it is difficult to separate the two maintenance zones for the busbars and to provide independent The document outlines various engineering design calculations and milestones for switchyard and substation projects, industrial projects, and civil and structural works. • Design the required electrical interconnections to ensure correct functioning of the substation equipment • Draw up a list of design inputs for building and structural design engineers • Plan the support facilities required for the substation ElEctrical SubStation and Switchyard dESign Design and Drawings for: 415/240Vac distribution systems with auto-changeover switching. Calculations are shown to determine the tolerable touch and step voltages, grid resistance, attainable mesh and step voltages based on the input. Design requirements and activities to be dealt with are presented for the main components, such as substations, overhead lines and distribution network. Mechanical GA and Layout drawing of the HVWS system along with Deluge valve mounting details. Jul 21, 2018 · Although there are four possibilities of disposition (Giles 1970), normally the horizontal disposition (d) is the preferred option. 2) Maximum for the area on 1. pdf from ENGGEN DESIGN at Auckland. 17. According to IEEE Std 80, this design should include a conductor loop surrounding the entire grounded area, plus adequate cross-conductors to provide convenient access for equipment grounds, etc. 2) Sizing of the earthing conductor is calculated based on the fault current and soil properties. Design calculation for sizing of pipes of fire hydrant systems and HVWS. ) • Site conditions (IP rating, soil resistivity, etc. A safe earthing system design has two objectives; to provide a means to carry normal and fault current without exceeding equipment limits or adversely affect continuity of service and to reduce the risk of a person in the vicinity of an earthed facility being exposed to the danger of a… Oct 3, 2023 · The design of the entire substation was made keeping in mind the most basic requirements of a proper substation including the civil and domestic requirements. have to be taken into account in fixing the location of the arrestors. Design calculations for Fire fighting system, Hydrants and High velocity water spray system. There is numerous electrical substation components like outgoing and incoming circuitry each of which having its circuit breakers, isolators, transformers, and busbar system etc for the smooth functioning of the system. Jun 12, 2020 · Are you sizing a lightning surge arrester for installation inside a substation? Electrical parameters: MCOV, TOV, and discharge voltage; should be on top of your list - for the correct application. Sep 21, 2016 · Step 6 – electrical layout design. Covers the design of the ground grid for safety and proper operation. 0 SYSTEM PARAMETERS 1System Voltage (Base KV) 220 KV 2Maximum Busbar Current 1600 A 3Fault Current 40 KA for 1 sec 4Base MVA 100 MVA 5Full Load Current for 3 Nos. These are: Extend the substation earth grid 0. panova@magtu. Dec 8, 2016 · The most widely used test for determining soil resistivity data was developed by Wenner and is called either the Wenner or four-pin method. The design of a ground grid, a network of bare conductors, is of vital importance, because poorly designed systems pose life-threatening hazards worldwide. Up to 220 KV, switching surges can be ignored, but over 345 KV, they are essential. See Figure 3. 42mm twin 1. 5 m overall height) and gantry structures with earthwire connections (20 m overall height). Switchyard Fence. C. 0 IGO) You are free to share this work (copy, distribute and transmit) under the following conditions: you must give credit to the ITER Organization, The document provides calculations for the earthing system of a 66kV switchyard for a 10MW biomass power plant. Low level layout of the switchyard of step up station should be provided. I began explaining Grounding Design Calculations for second type of buildings: AC Substations in Article " Grounding Design Calculations – Part Ten " where I explained the following: Design Procedures for grounding system design as per IEEE 80: Guide for safety in AC substation grounding, Dec 4, 2020 · An important concept is that the shielding system design assumes a strike current of magnitude I1. 5m-1. , DG room, Store shed, Security room, Switchyard panel room (AC Kiosk), pump house, fire water reservoir • Switchyard layouts and GAs. Input quantity for an estimate. Key details include: 1) Input parameters such as fault current, soil resistivity, electrode details are specified. Bazian Steel Factory S/S 132/11kV, 1x30/40 MVA 1. Calculations are shown determining maximum short-circuit forces for different spacer spans on the conductors. The fence is then bonded to the grid at regular intervals. Also Read: Light Emitting Elements And Their Types Calculation of lighting levels is done using specific software, like DIALUX, and must take into account the type and the width of the street/road, the mounting height of the lighting fixture, the length and the angle of inclination of the pole bracket, the type of lighting fixture and the type This document provides calculations to justify the direct stroke lightning protection system design for a 400kV switchyard in Ethiopia. Uninterruptable power supplies. Box 47936-00100 The Art of a Switchyard Design. Mar 1, 2024 · The design concerns and methods for EHV substations are similar, however some elements dominate at various voltage levels. Key points include setting the lightning mast height at 40m, calculating the protective Approved conductor sizes for NEW Construction By design. The relevant experimental results are also presented. 5 MW shp station 86 19 33 kV Outdoor Switchyard Layout – Sections of a 2x3. You will also be acquainted with the theories in protective relays, trip schematics and wiring diagrams, auxiliary gear, as well as substation mechanisation and its integration with the overall systems that it is a vital part of. Number of circuits per structure 1 unless specifically approved by TO Min. Values of L, E and U for street and road lighting. Air conditioning and ventilation system design calculations. Volume III, Conductors and Bus Design. 2 Switchyard. Covers the general design considerations, documents and drawings related to designing a substation. It includes: 1) An introduction describing the electrogeometric model and rolling sphere method used for shielding design. The design of a grounding system will help with the safety of personnel and protection of equipments within the substation, if a fault were to occur in the switchyard. Outdoor floodlighting and indoor/emergency lighting. Go back to Contents Table ↑. A grounding system is required for a switchyard that contains two 230/69kV step down transformers and other equipments. 5m beyond the fence perimeter. Design & Modelling of Substation Grid 4. It includes input parameters such as fault current, conductor size, soil resistivity and grid configuration. 2 Hydraulic design 2. A span length of 50 m is economical for guyed wire (strain) busbars. The switchyard may include step-up or step-down power transformers. The paper describes the step-by-step calculations necessary to determine the values of the mesh, touch and step potentials appropriate for a good The Manual Method (Equations and Tables Method) for Calculations of Risk Assessment Study as per IEC 62305-2 can be reviewed in the following Articles: Design Calculations of Lightning Protection Systems – Part Seven; Design Calculations of Lightning Protection Systems – Part Eight; Design Calculations of Lightning Protection Systems 1. A comprehensive tool to determine the cost of building a substation or any small portion of it. The factors to be taken into account for designing substations shall be as under: a. Ref. Using four pins or electrodes driven into the earth along a straight line at equal distances of a, to a depth of b, current is passed through the outer pins while a voltage reading is taken with the two inside pins. Approaches to an Outdoor Switchyard Design E. The calculation based on the IEEE-80 guide was then compared with the results of the Finite Element Method performed by Electrical Transient Analyzer Program iv) The following particulars shall be taken into account for calculation & design of earthmat: Sl. 1 Selection of Turbine and Governing System 3. Oct 21, 2020 · Switchyard Design Facts. Substation design requirements will be determined by the following studies. Medium voltage networks – Load flow calculation and network planning EARTH MAT DESIGN CALCULATION FOR 33 KV S/STN for M/s Sukhbir Agro Energy Ltd, Shahjahanpur, U. Patshin Magnitogorsk State Technical University, 38 Lenina Avenue, Magnitogorsk 455000, Russian Federation ea. 5 times the projected area of one face for latticed structures and on single projected area in the case of other structures. Planning criteria • Load forecast (average load, peak load, base load, etc. Structural design calculations for lattice or pipe type support structures, gantry towers, beams and transmission line towers by Staad Pro software. The document calculates short-circuit forces on flexible conductors for a 400 kV switchyard. 5 m overall height), air terminals mounted onto the building roof (17. HV SWITCHYARD DESIGN SCADA & COMMUNICATIONS Design of: The following is a brief description of each course. 16. Box 47936-00100 Oct 23, 2014 · 9. How to do Lighting Design Calculation in a Building – Electrical Wiring Installation . Sub-Station Design Criteria & Studies. • Soil resistivity testing. Suggested Reading – Medium voltage networks – Load flow calculation & network planning. The Average Soil Resistivity measured as : 2. ) • Security of supply (frequency and duration of outages) • Power quality (harmonics, voltage flickers, BIL, etc. Underrated cables May 21, 2020 · It is a major challenge to design such a modern complex structure keeping in mind all the design parameters. 67 daN. In coastal regions the wind pressure may be assumed as 170 kg/sq. Often utility systems have existing infrastructure where additional loads may be introduced by demographic changes (such as major commercial ventures, resorts etc. INTRODUCTION Sep 12, 2020 · What are Step potential and touch potential and Step potential and touch potential calculations Step Potential and Touch Potential: Step Potential is nothing the potential developed between the two feet on the ground of a man or animal when a short circuit occurs. 41 MVA TRAFO 323 A 6Maximum Load Current Considered 800 A 1 day ago · View MEL-0058-OLK1-CV-019 R1. Switchyards need to be designed with respect to the foreseeable voltage stress, switching, breaking and short-circuit withstand capability, loading under normal and emergency conditions taking account of the requirements of load dispatch management It’s worth mentioning that the direct method of fault level calculations is more straightforward to comprehend than the per-unit method. V. Dec 7, 2020 · Assuming we’re working with a maximum transformer design impedance of 10. 0 IGO-ported license. Design Considerations of the Substation and Switchyard The Substation or Switchyard can be conventional air insulated substation (AIS) of Gas Insulated Substation (GIS) or a Hybrid Substation. 4) Resistance 1 day ago · View MEL-0058-OLK1-CV-019B - R0. 4 Maintenance of civil works (including hydro-mechanical) 2. Learn everything about Substation and Switchyard Design, Earthing Design and Short Circuit Calculation for Substation This webinar discusses the basic configuration of a substation as well as the key players involved with operations and control of transmission and distributi ITER Electrical Design Handbook Codes & Standards This work is licensed under the Creative Commons Attribution-Noncommercial-NoDerivs 3. Many factors like system voltages, basic impulse insulation level, arrestor rating, station layout, number and arrangement of lines, the position of isolators, the distance between equipment, etc. I began explaining Grounding Design Calculations for second type of buildings: AC Substations in Article " Grounding Design Calculations – Part Ten " where I explained the following: Design Procedures for grounding system design as per IEEE 80: Guide for safety in AC substation grounding, From above, we find that the angles for the protection angle method are obtained from a rolling sphere analysis and this is why the protection angle method is limited to the maximum height of the equivalent rolling sphere as in Figure which identifies the restrictions when using the protective angle method for the air termination system design. Box 47936-00100 Jul 14, 2022 · Tolerable Step and Touch Voltages Reduction Factor Due to Resistivity of Crush Rock Surface. This process aims to minimise power losses and guarantee a consistent and reliable power supply to end consumers. 4 MW power plant according to IEEE standards. • Switchyard layouts and GAs. Substation Grounding Tutorial May 26, 2023 · Complete Lightning Protection System Design Calculation and Layout Design | Lightning Protection System as Per IEEE 998, Dr. P. Design and Drawings for: 415/240Vac distribution systems with auto-changeover switching. citation preview. No. Aug 10, 2023 · The principal objective of a switchyard is to enable the conversion of voltage levels, hence optimising the transmission of electricity across extensive distances. Calculation EMPLOYER :- KENYA ELECTRICITY GENERATING COMPANY (KENGEN) Stima Plaza Kolobot Road Parklands P. 1 day ago · View MEL-0058-OLK1-CV-019B - R3. This paper presents the requirements, design considerations, design parameters, magnetic field calculations, and measurements of the kicker magnets. Box 47936-00100 GPO Nairobi, Kenya This standard is a companion document to the earthing design standards and details the design criteria, data and calculations for use in substation earthing design at all voltages. Box 47936-00100 Apr 2, 2024 · A lumped-inductance kicker prototype was developed using a vacuum chamber with a single-turn coil. Load Flow Studies design to be unsafe. considering all design standards is a great challenge. The selection of the secondary current of the CT depends on the applications. 3) Configuration of the main earth mat is determined including total length of conductors. : 011-2923 7746,2923 3249 fax : 011- 29235497 january 2008 earthing system design calculations reference: ieee 80 1. 6 | Substation Primary Design Standard_____ Table 1: Drawing sheet numbering High Voltage design Buses are merely convenient means of connecting switches and other equipment into various arrangements. No Description Design input data for sub-station For 400/220/132/33KV SS For 220/132/33KV SS For 132/33KV SS (i) Fault Current (KA) 50 40 31. Right-of-way width (Target values) 200 ft minimum Max. #EarthingGridDesign#EarthingGridDesign (IEEE80)#EarthingGridDesigninETAP(IEEE80)#Earthgridcalculation# 1 day ago · View MEL-0058-OLK1-CV-020-CT-R1. Fault calculations are useful to study cases of: Switchgear being overstressed. The appendices also include supporting and background information on various aspects of substation earthing. The full magnetic field strength was 0. 20 MB: Pages: 97: Download: Right here | Video Courses | Membership | Download Updates This document provides the design calculations for earthing a 66kV switchyard. 3) Calculation of total grid resistance considering contributions from the grid conductors and Abstract:- This paper describes the procedure and calculation to design earthing of a switchyard using MATLAB software and IEEE 80-2000. 25% at 40 MVA. Fig1-sld of 66Kv/11Kv Substation Here, the unique busbar arrangement with sectioning 16 33 kV Switchyard Layout – Single Bus Scheme with SF6 Circuit Breaker 84 17 33 kV Switchyard Layout - Single Breaker Two Bus Scheme - Typical Transformer Bay (4 x 4 MW) with Vacuum Circuit 85 18 33 kV Outdoor Switchyard Layout – Plan of a 2x3. This innovative tool takes into account factors such as load requirements, voltage levels, system redundancy, reliability, and maintenance accessibility to generate multiple X EARTHI NG DESI GN AS PER I EEE 80: 2013 - AT A GLANCE ITEM DESCRIPTION SYMBOL UNIT VALUE Length L1 m 20 Width B1 m 12 Length L2 m 14 Width B2 m 6 2 STEP 1 1 2 FIELD DATA Rectangle-1 (GIS Hall) Rectangle-2 (Transformer Yard) 3 Total enclosed area by ground grid A 4 Soil resistivity 324 r (m ) Wm Ig (=IF) kA 7. This oil catch pit is constructed around the transformer foundation. It provides input data on the system, conductor properties, installation details, and describes the methodology used from IEC standards. xfog ppav krag iqjqwqre tou bktugt hzekj bueo kbw wdyhlm