Substation Grounding Ppt

In engineering practice, the distinction between electrical engineering and electronics is based on the comparative strength of the electric currents used. Grounding is, in essence, the control of abnormal voltages or currents through the proper application of Ohm=s Law: E = IR (Simplified Form) E = IR + jIXC + jIXL Grounding is the control or minimization of R in order to reduce the effects of E & I. Fence Grounding n The National Electrical Safety Code® requires grounding metal fences used to enclose substations with energized electrical conductors or equipment. They are located at each side of the circuit breaker. com provides online (web-based) professional development courses (PDH hours units credits PDHs) continuing education units (CEU CEUs) and learning units (LU LUs) for engineer (engineers PE P. MULTIPOINT GROUND. The Ergon Energy design philosophy is to provide substations:. MAIN COMPONENTS OF SUBSTATION. DON'T ever climb the fence around an electrical substation. A well-designed grounding system will ensure reliable performance of the substation over its entire service life. For further resources, why not check out our video support library and our electrical testing & electrical safety blog. Neutral Grounding Resistors are used to reduce problems such as insulation breakdown caused by transient over-voltages produced by arcing ground faults in ungrounded systems and damage to motors and switchgear caused by arcing in solidly grounded systems. 1 Basics of Power System Control and Protection A. Voltage levels up to 400kV GIS and AIS site plans, layouts, ducts and trench layouts, transformer bund details, access and egress drawings for installations and maintenance, hazard plans, CDM drawings, demolition drawings. If you are looking for something specific, don't hesitate to contact us. System Neutral Grounding Importance This section is devoted to the proven benefits of proper system grounding, and in particular, the added advantages of resistance (current limited) grounding. Grounding conductors are sized according to the equation A = KI√S, where A is the cable size, commonly in circular mils, K is the connector factor, I is the maximum fault current and S is the maximum fault time, in seconds. Gas Insulated Substation PPT PDF Presentation Gas Insulated Substations (GIS) is a compact,multicomponent assembly enclosed in a ground metallic housing in which the primary insulating medium is compressed Sulphur hexafluoride (SF6) gas. In this course, you will learn about specific facility grounding problems and their consequences, such as fires, electrocutions, and equipment damage. Guide for the Design, Construction and Operation of Electric Power Substations for Community Acceptance and Environmental Compatibility THIS DRAFT IS FOR PUBLIC COMMENTS ONLY. What does a good grounding. Most utility power companies treat transmission and distribution lines as separate entities. size grounding electrode conductor for DC systems 250. In some plants, electrical diagrams may also be called prints, or blue prints. Over the Years Grounding Design Terms and DefinitionsProcedures Have Been Developed as Well as Appropriate Standards, Most Notable: •ANSI/IEEE Std 80-2000, IEEE Guide for Safety in AC Substation Grounding. Our highly experienced engineering team can carry out a FREE site visit to survey electrical switchrooms and substations for electrical substation safety equipment requirements. Vol-2 Issue-3 2016 IJARIIE-ISSN(O)-2395-4396 2764 www. ELECTRICAL GROUNDING AND EARTHING SYSTEMS Presented By: T. The system shall meet its operational performance requirements for both direct and indirect effects of lightning. The Association of Electrical Equipment and Medical Imaging Manufacturers. Ajay Patel3. A ground mat is a system of bare conductors, on or below the surface, connected to a ground to provide protection from high voltages. ELECTRICAL SYSTEM GROUNDING ISSUES Grounding is an important part in all electrical construction projects. Electrical diagrams are drawings in which lines, symbols, letter and number combinations are used to represent electrical circuits. • Ground Grid Analysis and Design - calculations to ensure the design provides adequate safety for personnel during ground fault conditions. The Differences Between and Purposes for Bonding, Grounding, and Earthing in North American Power Distribution Systems S. WIND TURBINES GROUNDING SUBSTATION The grounding grids of all the W. The groundings of buildings, substations and the utility grid as a whole could be considered as non-neutral grounding. The design of substation grounding systems, discussed later in this article, usually precludes the electrical exposure for which dielectric overshoes are designed. 19d volume i change transmittal 1 from: chief of naval operations subj: navy occupational safety and health (navosh) program manual for. 167 adds ground fault detection on DC systems 250. Where Switchyard means collection of equipment where high voltage electricity is switched using of various components. CT's are instrument transformers used for converting primary current into a reduced secondary current for use with meters, relays, control equipment and other instruments. A fault that occurs 10 miles from a substation can cause swells of 1. Pioneer manufactures Grounding Transformers with maximum primary voltage of 72,5 kV (350 kV BIL) with or without an auxiliary/secondary winding. For further resources, why not check out our video support library and our electrical testing & electrical safety blog. 530 13 Conductor spacing for AIS layouts Phase to ground Phase to phase meters meters 1. edu emc-education. In most cases, salary certificate or salary letter come into picture when an employee thinks about how to overcome current or forthcoming financial crisis - personal debt, purchasing a car, buying a house are the common occasions. 2 Other references should be consulted for more information about these subjects. D – Substation Standards Lighting Fixture Pole and Bracket Mounting 19. Over the Years Grounding Design Terms and DefinitionsProcedures Have Been Developed as Well as Appropriate Standards, Most Notable: •ANSI/IEEE Std 80-2000, IEEE Guide for Safety in AC Substation Grounding. Arial MS Pゴシック Calibri Arial Narrow Blank Presentation PowerPoint Presentation PowerPoint Presentation What does hazard mean? Why know about it? What are the safety priorities? How do you respond to electrical incidents? Do you want to be a victim? What are the types of injuries? What are the levels of effect of current?. Design of Grounding System for an Electrical Substation: An Overview Maneesh kumar, Gagandeep singh. Thank you for your question regarding distribution and substation grounding systems, it is our pleasure to help. – A free PowerPoint PPT presentation (displayed as a Flash slide show) on PowerShow. 15kV Switchgear 15 kV Switchgear Substation Pre-Purchased Equipment 20MVA Transformer Fabrication has started Expected Delivery - April 2010 (3 months early) Construction of transformer foundation to be coordinated with transformer delivery Contractor is planning to off-load transformer directly to it’s foundation Rigger is already starting. 3GW of coal based capacity was decommissioned. 2 times of the theoretical value. DANGER: If a bonding jumper is not installed from the equipment grounding conductor to the grounded (neutral) terminal of the derived system, then a ground fault cannot be cleared and the metal parts of electrical equipment, as well as metal piping and structure steel will become and remain energized providing the potential for electric shock. 4th Semester, Electrical Power System, KITRC, Kalol. A short-duration difference in potential between conductive objects that a person may contact when personal protective grounds or a grounding system conduct fault current. Kirichenko, S. SAFETY PERSPECTIVE REMARKABLE HOUSTON DALLAS/FORT WORTH IEEE Fort Worth PES Chapter High Voltage Substation Design Approach - For Utility Systems By: Gustavo A. Workers in a substation should be aware of the locations and vent paths of these devices to avoid being showered by debris in the vent pathways. or a substation. Ordnance shall meet its operational performance requirements after experiencing a near strike in an exposed condition and a direct strike in a stored condition. If there is no earth/ground electrode, people's lives may be endangered and electrical installations and other property may be damaged. Humidity and Its Impact. In most cases, salary certificate or salary letter come into picture when an employee thinks about how to overcome current or forthcoming financial crisis - personal debt, purchasing a car, buying a house are the common occasions. Presentation of earthing system of electrical nets. It provides means of dissipating electric current into the earth without exceeding the operating limits of the equipment. • ANSI/IEEE 80 Guide for Safety in AC Substation Grounding • ANSI/IEEE 81 Guide for Measuring Earth Resistivity, Ground Impedance, and Earth Surface Potentials of a Ground System • ANSI/IEEE 998 Guide for Direct Lightning Stroke Shielding of Substations • ANSI/ IEEE 367 Recommended Practice for Determining the Electric. It is, therefore, crucial to measure step and touch voltage at locations in and around the substation in order to ensure safety for persons and animals. Today I will explain the Last Two Types of Earthing Systems as follows. Electrical Grounding and Bonding per the National Electrical Code. Tank Diameter-Where tank spacing is expressed in terms of tank diameter, the. LV Switchgear and Systems 52 8. 31 1073 Rev. Put simply, conductor size depends on magnitude and duration of fault current and on the type of connections used in the. Necessary flanges, bolts, clamps fittings etc. These methods are explained below in details. 5 - 345 KV substation. They are located at each side of the circuit breaker. 9kV delta-delta TR with a grounding bank for relay protection and ground source Ground bank failed Mobile sub installed to take its place Low side connected to system High side left disconnected 29. opnavinst 5100. This substation is constructed using steel lattice structures to support strain bus wires and apparatus. substation engineering and design, and for managers or seasoned designers who want an overview of the complete substation engineering and design process. are within the scope of the supplier. Bonding, Grounding and the NEC Presented by The National Association of Certified Home Inspectors www. Grounding is used to get a reference point to measure voltage, to get a common return path for current and to physical connection of body. Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Distribution Substations Purpose: To lower the voltage from the high voltage transmission and sub-transmission levels to a voltage that can be safely installed on the streets. Most commonly used methods of earthing are pipe earthing and plate earthing. Corona and Induced Current Effects desktop computers as well. Your emazing video is on its way! An email will be delivered to. The current division factors = 0. continuously monitor clamp and ground connection during transfer. 5 MVA for 30 seconds duration. The substation design manual is not intended to replace Asset Management Standards, but rather to act as a reference document that cross-references existing standards and process documentation and plugs any gaps where Asset Management documentation does not exist. Fence Grounding n The National Electrical Safety Code® requires grounding metal fences used to enclose substations with energized electrical conductors or equipment. This fundamental course leads you through a step-by-step study of the substation design and construction process. In other words, to connect the metallic parts of electric machinery and devices to the earth plate or earth electrode (which is buried in the moisture earth) through a thick conductor wire (which has very low resistance) for safety purpose is known as Earthing or grounding. PRIMARY DESIGN. Securing Perimeter Area. There are a number of hazards unique to substations. •IEEE Std 487-2007, Recommended Practice for the Protection of Wire-Line Communication Facilities Serving Electric Supply Locations. 166 adds max. All electrical equipment in the substation, substation yard, and within 5 meters of the substation fence shall be connected to the grid or to a ground bus connected to the grid. SUBSTATION HIGH VOLTAGE COMPONENTS POWER PLANT SWITCHING STATION (SWITCHYARD) SUBSTATION SUBSTATION - A station in the power transmission system at which electric power is transformed to a conveniently used form. Our 2-Day Substation Training course will cover the major elements that build electrical substations and switchyards. In some plants, electrical diagrams may also be called prints, or blue prints. Substation grounding impedances of 0. 5 - 345 KV substation. System Neutral Grounding Importance This section is devoted to the proven benefits of proper system grounding, and in particular, the added advantages of resistance (current limited) grounding. ppt Author: Daryld Ray. Power substation is typically grounded with earth mesh and will have series of ground strikes connected by earth wire and clamp [1]. ppt This document and its contents are the property of Mini-Circuits. With proper caution,the methods described herein are also applicable to indoor portions of such substations, or to sub-stations that are wholly indoors. In a home, grounding provides a safe pathway for electricity that could cause a shock hazard to residents. Design of Grounding System for an Electrical Substation: An Overview Maneesh kumar, Gagandeep singh. • NFPA 130, Standard for Fixed Guideway Transit and Passenger Rail Systems. TYPES OF EARTHING SYSTEMS. This is showing three of the five 220 kV/66 kV transformers, as well as high-voltage transformer fire barriers, each with a capacity of 150 MVA. Prefabricated substations 56 10. In 2016, ELECTRICAL CONTRACTOR and NECA hosted a two-part webinar on the significant changes for the 2017 National Electrical Code. DANGER: If a bonding jumper is not installed from the equipment grounding conductor to the grounded (neutral) terminal of the derived system, then a ground fault cannot be cleared and the metal parts of electrical equipment, as well as metal piping and structure steel will become and remain energized providing the potential for electric shock. REPORT DOCUMENTATION PAGE Form Approved OMB No. Understand why substations have ground grids to minimize touch and step potential. A short-duration difference in potential between conductive objects that a person may contact when personal protective grounds or a grounding system conduct fault current. In this course, you will learn about specific facility grounding problems and their consequences, such as fires, electrocutions, and equipment damage. Grounding System for High Resistivity Limited Area Substations in Hilly Region of Himachal Pradesh. Explain the fundamentals, basic principles, and requirements of grounding and bonding. It provides means of dissipating electric current into the earth without exceeding the operating limits of the equipment. Voltage levels up to 400kV GIS and AIS site plans, layouts, ducts and trench layouts, transformer bund details, access and egress drawings for installations and maintenance, hazard plans, CDM drawings, demolition drawings. Substations threaten our health & safety. 0 show minimal effects on swells caused by faults out on the feeder. 9kV delta-delta TR with a grounding bank for relay protection and ground source Ground bank failed Mobile sub installed to take its place Low side connected to system High side left disconnected 29. The grounding gives low resistance path to earth and reduces rise in ground potential which is dependent on magnitude of fault current and resistance of grounding system. than 40 percent of the rating of the neutral grounding resistor ii. • ANSI/IEEE 80 Guide for Safety in AC Substation Grounding • ANSI/IEEE 81 Guide for Measuring Earth Resistivity, Ground Impedance, and Earth Surface Potentials of a Ground System • ANSI/IEEE 998 Guide for Direct Lightning Stroke Shielding of Substations • ANSI/ IEEE 367 Recommended Practice for Determining the Electric. IT SHOULD THEREFORE NOT BE REFERRED TO AS A ZAMBIAN STANDARD. Advantages of Outdoor Substation (AIS): This type of substation arrangement is best suited for low voltage rating substations (step down substations) and for those substations where there is ample amount of space available for commissioning the equipment of the substation. Sidharth Sankar Achary Regd No-1021106019 7th sem. Phase to ground Phase to phase meters meters 0. Grounding Systems Visual Inspection - Grounding System Connection Check - Torque at joint Electrical Test - Grounding Resistance Test Performed the test by fall of potential method. SUBSTATION • SUBSTATION - A station in the power transmission system at which electric power is transformed to a conveniently used form. Notes on Substation Grounding. substation engineering and design, and for managers or seasoned designers who want an overview of the complete substation engineering and design process. That voltage rise is transferred through the line to the work site, where it can create a hazard to workers on the site. , tank farm or other remote areas. For fulfilling these huge power demands the modern time requires creation of bigger and bigger power generating stations. Surge arresters are generally connected between phase conductor and ground. View and Download PowerPoint Presentations on Earthing And Grounding PPT. DEFINITIONS AND INTERPRETATIONS Exposure voltage. EATS 41-24 - Guidelines for the Design, Installation, Testing & Maintenance of Main Earthing Systems in Substations. require some type of substation, at least at one end, to house the pressurization and cathodic protection equipment. These conductive enclosures, underground grounding grid and above ground bus bars, all contribute to the grounding system. 166 adds max. a method of personal protective grounding in which a low resistance short circuited connection from line to ground is provided on one or both sides of the work site. Universal primary injection test set for substation assets. Substation arrangements have to include adequate space for the installation and possible removal of large pieces of equipment such as power transformers and power circuit breakers. 6 GROUNDING CABLE CONNECTION. You can plug a two-prong or three-prong plug into a standard three-prong receptacle. The resistance of the earth is very low. txt) or view presentation slides online. One thing I remember thinking as I walked into a substation for the first time is that it would be pretty easy for a person to get killed inside the facility. The earthing transformer covered by this specification shall be complete in all respect. Substation Safety - Best Practices. For the purposes of this discussion, substation refers to substations and switching stations. Each problem requires its own study and solution, though humidity plays an important part in the degree of concern. These sections include, among others:. Step and touch voltage tests. The compact site was only 40ft wide by 125ft long. Thank you for your question regarding distribution and substation grounding systems, it is our pleasure to help. A mobile substation, with a complete substation installed on a trailer, can be moved at any time with a tractor for immediate installation and operation. Guidelines and policies vary according to the Distribution Network Operator – specialist contractors using modern earthing techniques compliant with relevant British and international standards, including BS 7430:2011+A1:2015 Code of Practice For Earthing and IEEE80-2000 Guide for Safety in AC Substation Grounding should be employed to. Distribution Substation Monitoring System Geraldo Rocha, David Dolezilek, Fernando Ayello, and Carlos Oliveira, Schweitzer Engineering Laboratories, Inc. For power to be useful in a home or business, it comes off the transmission grid and is stepped-down to the distribution grid. earthing-system. Potential Transformer (PT) และ Neutral Grounding Resistance (NGR) 7. 52 Electrodes Water Pipe if 10 ft. The high voltage system in a station along with the various capacitance paths (in equipments) to the ground mat, and the mat itself together form a. 0 show minimal effects on swells caused by faults out on the feeder. 186 is a new requirement for services over 1kV to have supply side bonding jumper brought to the service equipment 250. 31 1075 Rev. Design of Grounding System for an Electrical Substation: An Overview Maneesh kumar, Gagandeep singh. Our ability to tailor the solution to fit your needs is unsurpassed in the market today. Our 2-Day Substation Training course will cover the major elements that build electrical substations and switchyards. In this course, you will learn about specific facility grounding problems and their consequences, such as fires, electrocutions, and equipment damage. and equipment are explained using more than 600 animated PPT slides. Our highly experienced engineering team can carry out a FREE site visit to survey electrical switchrooms and substations for electrical substation safety equipment requirements. MAIN COMPONENTS OF SUBSTATION. Determination of optimal substation ground. At a glance. Neutral grounding primarily focuses on grounding system ELV systems and EHV systems. Over 2000 workers are sent to burn centers each year with severe Arc-Flash burns. Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. Grounding & Bonding. standards being acceptable as grounding and bonding equipment suitable for direct burial. Substation grounding impedances of 0. com cell: 727. Substation Grounding/Earthing The sole purpose of substation grounding/earthing is to protect the equipment from surges and. This presentation was developed by N. substation grounding - ENA TS 41-24 Guidelines for the design, installation, testing & maintenance of main earthing systems in substations - BS EN 50522:2010 - Earthing of power installations exceeding 1. Vehicle grounding advantages and disadvantages are discussed in detail. 201 Grounding Systems for Overhead Lines - General 13 202 Preparation for Temporary Grounding of Overhead Lines 19 203 Installation of Temporary Grounds on an Overhead Star (Wye) Connected Circuit 20 204 Installation of Temporary Grounds on an Overhead Delta Connected Circuit 22 205 Rationale for Personal Grounding Using the Grounding Cluster. Since this. Actual field test results of grounding sets being closed in on are discussed effectively comparing single point, bracket, and equal potential grounding. are connected with the substation grid through bare copper conductors, making the whole W. Enjoy! 😁 PS: Now, pick up your topic and help us spread the word about CrazyEngineers among your friends. iv) The potential transformer shall be capable to withstand line discharge effect and also the ferro resonance effect. Instead, pull from the plug. Get the plugin now. Urban substations are usually built in brick, whereas rural ones are often installed externally directly on the MV pylon. REPORT DOCUMENTATION PAGE Form Approved OMB No. LIGHTNING PROTECTION CHECKLIST. About Company; Affiliation & Accreditation; Business Portfolio; Our Partners. PowerPoint Presentation: TRANSFORMER Power transformers are used in transmission network of higher voltages for step-up and step down application (400 kV, 200 kV, 110 kV, 66 kV, 33kV) and are generally rated above 200MVA. • The National Electrical Code. Carey, PE Principal Engineer National Grid * * Purpose National Grid is reviewing a work methods change that may require the use of rubber gloves & protectors while splicing medium voltage underground cables. If a ball or pet gets inside the fence, ask a grown-up to call the electric company - they'll come and get it out for you. The functions of grounding systems or earth mat in include: Ensure safety to personnel in substations against electrical shocks. SUBSTATION OVER VIEW - authorSTREAM Presentation. GROUNDING SYSTEMS Part 1 The objective of a grounding system are: 1. 1100 Recommended Practice for Powering and Grounding Electronic Equipment, Signal Reference Subsystem, Equipontential Grounding, Separation of Loads, Lighting/Surge Grounding. The grounding system appears to the lightning impulse as a transmission line where wave propagation theory applies. Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. Abstract—The most critical component of a protection, con-trol, and monitoring system is the auxiliary dc control power system. ) land surveyor (surveyors LS PLS) and architect (architects AIA A. PRESENTATION ON SUBSTATIONS ELECTRICAL POWER GENERATIONS 2. Presentation Summary : A minimum value of the substation grounding system resistance in uniform soil can be estimated by means of the formula of a circular metal plate at zero depth. For power to be useful in a home or business, it comes off the transmission grid and is stepped-down to the distribution grid. An electrical substation is a critical resource in a power system. DANGER: If a bonding jumper is not installed from the equipment grounding conductor to the grounded (neutral) terminal of the derived system, then a ground fault cannot be cleared and the metal parts of electrical equipment, as well as metal piping and structure steel will become and remain energized providing the potential for electric shock. A single point grounding system is achieved when all equipment within the structure(s) are connected to a master bus bar which in turn is bonded to the external grounding system at one point only. 7 Losses in the substation 52 8. For the purposes of this discussion, substation refers to substations and switching stations. Most utility power companies treat transmission and distribution lines as separate entities. to be a equipotential space, such a big amount of grounding conductors embedded in the ground produces a very low W. Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. iv) The potential transformer shall be capable to withstand line discharge effect and also the ferro resonance effect. com 4379 66/11 kV DISTRIBUTION SUBSTATION DESIGN Mr. A grounding system that is acceptable for power circuits or lightning protection is more than adequate for a static electricity grounding system. In substations the protection relay scheme can be complex, protecting equipment and busses from various types of overload or ground/earth fault. It is also known as optical fiber composite overhead ground wire. Large scale PV power plants proposed in Australia may exceed a gigawatt in. 31 1073 Rev. Electrical Substation Now days the electrical power demand is increasing very rapidly. In the very early days of power distribution and telegraphy the earth (ground) was used as the current return path. ZAMBIA BUREAU OF STANDARDS. System Grounding. Earth faults can be weekly occurrences on primary substations supplying extended high voltage rural overhead line networks. 1 PURPOSE OF SUBSTATION. Distribution system and protection against indirect contact and earth fault. The operational flexibility and reliability of the substation greatly depends upon the bus. WIND TURBINES GROUNDING SUBSTATION The grounding grids of all the W. 1 Overvoltages. The grounding system in substation is very important. ppt), PDF File (. The first layer is. com - id: 1ca95d-NGI3Z. Guide for the Design, Construction and Operation of Electric Power Substations for Community Acceptance and Environmental Compatibility THIS DRAFT IS FOR PUBLIC COMMENTS ONLY. associated overall plant grounding system shall account for hazards due to transferred potentials caused by a fault in the substation. Grounding substation equipment, busses, conductors, and the use of grounding transformers are explained. Grounding is used to get a reference point to measure voltage, to get a common return path for current and to physical connection of body. Presentation on substations 1. The GIS substation has most of its electrical structure contained in sealed tubular enclosures. Introduction to Substations Annotated Instructor's Guide Module Overview This module introduces trainees to the function of substations at all levels of the power grid, with an introduction to typical substation components included. Consolidation EFFECTS OF SAMPLE DISTURBANCE OC Clays - Figure 7. Abstract The main purpose of this paper is to acquaint the reader with various types of grounding systems prevalent in an Electrical substation and their importance. DEFINITIONS AND INTERPRETATIONS Exposure voltage. similarly improve the appearance of substations with larger structures by reducing the size of some of the large supporting structures or eliminating them altogether. Directions and methods for qualifying permanent connections used for substation grounding are provided. Since the transmission system is typically rated from 130kV up to 700kV,. About Company; Affiliation & Accreditation; Business Portfolio; Our Partners. 5 Lightning. Our dedicated Substation Testing site caters for all your substation testing and substation monitoring equipment needs: Battery Testing We supply a full range of battery test equipment - battery impedance testers, battery discharge test equipment and battery ground fault locators from Megger (Programma) and G. 2 Other references should be consulted for more information about these subjects. Substations - Program 37. An additional 18 inches of crushed stone is commonly spread on the surface to pro-vide increased protection of personnel from step potentials. And Types of Earthing Systems according To Its Size can be divided to Two types as follows: simple. Learn how to measure ground resistance and test large ground systems. Connector housings are usually made of molded plastic. A unit substation is factory built and tested, then shipped in modules that are bolted together at the site. Neutral Grounding Resistors are used to reduce problems such as insulation breakdown caused by transient over-voltages produced by arcing ground faults in ungrounded systems and damage to motors and switchgear caused by arcing in solidly grounded systems. Solar Photo‐Voltaic (PV) Power Plant Earthing Design Services In 2015 1. 52 Electrodes Water Pipe if 10 ft. Safe operation of a substation calls for a properly designed and installed grounding system. Enterprise power system analysis software to design, analyze, monitor, and operate electrical power systems in generation, transmission, distribution, industrial, transportation and low voltage sectors. com - id: 64529f-NDlmY. Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Fault Current Control Since the substation is the origin point of circuits, faults on the circuit return to the substation. Power substation is typically grounded with earth mesh and will have series of ground strikes connected by earth wire and clamp [1]. Minute holes in the soles of the footwear are the biggest area of concern in the protection scenarios. Fortunately, substation construction standards and the National Electrical Safety Code have changed over the years to help reduce hazards. impact of distributed generation (dg) on distribution systems chuck mozina consultant beckwith electric [email protected] Good grounding path of. NSF/ECEDHA Education Workshop Georgia Tech GLC, Atlanta, Georgia, July 9-12, 2011 1. Neutral Grounding in Electrical Utility Systems [7] Std. PDF | This paper presents methods for optimization of substation ground grid. • The National Electrical Code. , Not Exceeding (Amperes) Copper Aluminum or Copper‐Clad Aluminum* 15 14 12 20 12 10 30 10 8 40 10 8 60 10 8 100 8 6 200 6 4 300 4 2 400 3 1 500 2 1/0. A substation presents an inherent safety hazard because usually only some portions of the. However, the tower grounding resistance of the. Our ability to tailor the solution to fit your needs is unsurpassed in the market today. This is showing three of the five 220 kV/66 kV transformers, as well as high-voltage transformer fire barriers, each with a capacity of 150 MVA. 269(n)(2) •General. ABB's underground substation concept enables up to 98 percent of the installation's volume to be hidden and includes state-of-the art technologies to minimize noise emissions. All of the pertinent accessories of the transformer, including the load tap changers (LTC), lighting arrestors, pressure relays, and bushings will be cleaned and tested for the most optimal and comprehensive test results. Failure of the dc control power can render fault detection. transformer in the neutral connection of each grounding bank and additional CT secondary cables from the zig-zag grounding bank to the differential relays. In a home, grounding provides a safe pathway for electricity that could cause a shock hazard to residents. Compact transition poles are convenient for areas where siting a new substation is not practical and, in particular, for "hybrid" lines where there are intermediate underground dips in an otherwise overhead line. A 50 Hz electrical substation in Melbourne, Australia. adapted it to meet our requirements for designing substations. IT SHOULD THEREFORE NOT BE REFERRED TO AS A ZAMBIAN STANDARD. This course will give you an appreciation of how to design this type of substation and introduce you to all of the equipment's that you will find in a typical air insulated substation. • IEEE Standard 80, Guide for Safety in Ac Substation Grounding, which defines methods for calculating safe touch and step potential, and is widely used in the transportation industry for traction power substation grounding. In Phase-I, a study of existing network and availability of space for the substation and lines (up to 11 kV) of the campus is to be carried out. Also applicable to transferred potential between. Substation steel structures, that have not been retrofitted, can be upgraded using commercially available threaded stud grounding sockets. Though the earthing or grounding in electrical system is always invisible by physically & by its function but we can feel its importance only with the problems in electrical system with poor or no earthing system. Do not apply power until the wiring has been checked by an instructor. in the substation, substation yard, and within 5 meters of the substation fence shall be connected to the grid or to a ground bus connected to the grid. 1 Basics of Power System Control and Protection A. Ground potential rise (GPR): The maximum electrical potential that a substation grounding grid may attain relative to a distant grounding point assumed to be at the potential of remote earth. This comprehensive Grounding and Bonding training course is founded on the CE Code. Electrical Substation Design Fundamentals Learn the fundamentals of electrical, civil and structural design issues of electric power substations. It is more expensive to correct problems after construction. A grounding system designed as described herein will, nonetheless, provide some degree of protection against steep wave front surges entering the substation and passing to earth through its ground electrodes. A substation is assembly of large no of electrical equipment. Develop recommendations for PPL on the best practice for substation grounding system testing. A unit substation is factory built and tested, then shipped in modules that are bolted together at the site. If the overcurrent device operates slowly, or not at all, during the occurrence of the ground fault, the following may happen:. Configure octet 3 for substation identifier Allowing upto 256 substation per district Finally use octet 4 to assign the IEDs in substation or site Allowing upto 256 IEDs per substation NOTE: GOOSE messages do not use the IP, subnet mask, nor gateway addresses instead use the ethernet MAC address and GOOSE id. The location was an existing 500kV GIS substation located on the tenth story roof of a pump storage hydro station. Distribution system and protection against indirect contact and earth fault. Principles of Electrical Grounding John Pfeiffer, P. Federal and state environmental permit information was also included in this document for reference. We experience occurrences of static electricity everyday. The distribution system's network carries electricity from the transmission system and delivers it to consumers. similarly improve the appearance of substations with larger structures by reducing the size of some of the large supporting structures or eliminating them altogether.