In the transmission substation the voltage is increased substantially using step up transformers. It details the electrical hazards which must be managed to ensure the safety of personnel when working in switchyards, substations, high voltage. Electrical power substation engineering and layout electrical4u. This fourth edition represents the second major revision of this guide since its.
Install smoke alarms on each level of the home, out. P our first course for all journeyman construction electri. Substation safety manual free download as pdf file. A substation has the electrical and protection equipment necessary to transform power with safety and. Safety awareness for substations incident prevention. Todays substation equipment is almost entirely remotely operated.
Our expert engineering team can carry out a site visit free of charge to survey electrical switchrooms. Between the generating station and consumer, electric power may flow through several substations at different voltage levels. This document supports the power system safety rules and its requirements assembled under work in substations general. Substations equipment maintenance electric power systems. Prepare your own personal safety plan that includes personal protective equipment and electrical safety equipment to be taken with you and the thing you will study before commencing the work. Department of labor occupational safety and health. Section 12electrical safety requirements october 2009 125 12. A 50 hz electrical substation in melbourne, australia. Find electrical substation stock images in hd and millions of other royaltyfree stock photos, illustrations and vectors in the shutterstock collection. The substation safety information found in this article is drawn from 30 years of personal experience as well as industry best practices, regulations, codes and company.
Protection of substation electrical substation fuse. For safe operation and maintenance, a thorough knowledge of the substation, including aerial and underground. The aim of our substation safety awareness training course is that personnel entering a substation environment will have a good understanding of substation equipment and the associated hazards. A signal or flag person must guide cranes, cherry pickers, high lifts, and other equipment in transit near exposed energized lines or parts at all times. Oct 06, 2015 presentation on substation protection devices presented by. Substation, switchgear and equipment maintenance and testing. Distribution substation a distribution substation transfers power from the transmission system to the distribution system of an area. Keep these safety tips in mind when near substations. Oshas electrical standards are based on the national fire protection association standards nfpa 70, national electric code, and nfpa 70e, electrical safety requirements for employee workplaces. All personnel in electric substations shall wear protective clothing, including hard hats, safety glasses, steeltoed shoes, and flame retardant clothing. This document supports the power system safety rules and its requirements assembled under work in substations general category 3. Safety related, distributed functions in substations and the standard iec 61850 klauspeter brand, senior member, ieee, martin ostertag, and wolfgang wimmer abstractin a substation, a lot of distributed, safety related functions have to be performed. Feb 29, 2016 our customers for substation safety equipment regularly pose questions relating to safety protection during substation operation and maintenance. Each twoday session will focus on different aspects of substation safety, inspection, testing and maintenance.
Safety compliance checklist electrical utilities general 29 cfr 1910 y are workers wearing proper protective equipment ppe, such as gloves and sleeves. Our substation safety awareness training course is comprehensive and includes the following topics. Most fatalities in substations occur when workers inside neglect basic safety rules or enter the protective spaces established to prevent contact with exposed energized equipment. Dec 17, 2019 substations are potentially highrisk environments.
A study on electrical accidents and safety measures. Y is protective grounding equipment provided and capable of carrying the maximum fault current that could flow at the point of grounding for the time necessary to clear the fault269n34. A substation is a part of an electrical generation, transmission, and distribution system. Arcflash and other electrical safety hazards 27 electrical safety hazards 27 electric shock 27 arcflash and arc blasts 28 arcflash metrics 29 arcblast effect 31 light and sound effects 31 electrical hazard analysis 32 shock hazard analysis 32 approach boundaries 32 flash hazard analysis 34 arcflash calculations 35.
Pdf engineering final year project report on electrical. Equipment used to designate a safe work area and access route within a substation. The following current and former members of the substation subcommittee of the nreca. We are launching our power system electrician training programs starting january 17, 2011. The document describes safe work practices for the control of hazardous situations. This bulletin is an update and revision of previous rea bulletin 651, design guide for rural substations revised june 1978. This work instruction supports the power system safety rules and its requirements assembled under safe. The subtransmission 66,000 volt lines transport electricity through our streets and communities to zone substations, located throughout our cities and towns. The input for a distribution substation is typically at least two transmission or subtransmission lines.
We got the idea about the latest advancements going on in the field of gis and substation automation. Improve protection with a layered security approach. Our engineers have completed substation testing and maintenance including power transformers, switchgear from 600 v to 35 kv, overhead and industrial switches, reclosers, relays, breakers and regulators for over 20 different utilities and industrial customers. Personnel trained to work inside substations must take appropriate safety precautions and always wear personal protective equipment ppe. Substation network and load distribution substation network design civil works specification various subsystems in substation and their functions substation equipment and their functions design of capacity of transmission lines calculation of line. For the purposes of this discussion, substation refers to substations and switching stations. Use this checklist to help you find and fix electrical fire hazards in your home before they can start a fire. This substation is constructed using steel lattice structures to support strain bus wires and apparatus. Links with this icon indicate that you are leaving the cdc website the centers for disease control and prevention cdc cannot attest to the accuracy of a nonfederal website.
Safety clearance to electric supply station fences. Design safety standards for electrical systems, and 1910. Our customers for substation safety equipment regularly pose questions relating to safety protection during substation operation and maintenance. To preset protection trip unit and to display the result on the time current curve. A substation poster, two posters about what to do in the event of an indoor or outdoor electrical emergency, a poster displays the service rules. It turned out that a worker doing equipment checks at a substation had, against company policy, disabled two protective devices on the system. The electrical substation is the part of a power system in which the voltage is transformed from high to low or low to high for transmission, distribution, transformation and switching. Download practical electrical substation safety for engineers.
An electrical substation is a subsidiary station of an electricity generation, transmission and distribution system where voltage is transformed from high to low or the reverse using transformers. This electricity is then supplied to a transmission substation near the generating plant. At the end we hope that by this presentation your understanding regarding various types of substation, operation of a standard substation and also about the various equipements used in power substation would got more clear. Read on to find out what safety factors should be taken in to consideration for substation accessibility. Protection of substation free download as powerpoint presentation.
This program focuses on the basic safety principles and practices applicable to substations and switchyard maintenance work. To select new circuitbreakers when discrimination is mandatory. Power systems, substation electrician training with upgrades to the alberta power grid system estimated in the billions of dollars and10 years of work, we have a way for you to become involved. Arcflash and other electrical safety hazards 27 electrical safety hazards 27 electric shock 27 arcflash and arc blasts 28 arcflash metrics 29 arcblast effect 31 light and sound effects 31 electrical hazard analysis 32 shock hazard analysis 32 approach boundaries 32. An electrical substation takes electricity from a very high.
The purpose of this site is to establish a place where all substation workers can come and share their safety ideas,work methods and practices so that we can all benefit from kamagra oral jelly online each others experiences this sites main purpose is safety resource sharing u. Ieee p80d6 draft guide for safety in ac substation. Safe work practices on high voltage substation apparatus. A substation provides a protected area for switching power circuits and may include transforming power from one voltage to another.
Transmission and distribution substations customized solutions and modular concepts for utility and industrial applications substations substations are key installations in the power grid that facilitate the efficient transmission and distribution of electricity. A free powerpoint ppt presentation displayed as a flash slide show on id. From what i have seen there arent any special rules for using an extension cord in a substation. There are a number of hazards unique to substations. Electrical fire safety checklist smoke alarms test do you have smoke alarms in all the right locations. Thousands of new, highquality pictures added every day. All books are in clear copy here, and all files are secure so dont worry about it. Safe work practices on high voltage substation apparatus summary this document supports the power system safety rules and its requirements assembled under high voltage substation apparatus category 5. 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. Electricity hazards safety guide energy safe victoria.
See attatched hazard assessment checklist exercise 6. Substations transmission and distribution substations. Electrical hazards awareness page 5 of 49 efcog electrical safety improvement project objectives terminal objective 1. Our dedicated and highly qualified team is standing by to conduct a safety audit on your substation or switchroom today. Contact with substation equipment can cause serious injury or even death. Highvoltage cables are manufactured to exact specifications so that they can withstand a variety of mechanical and electrical stresses. A discussion of the national electrical code nec and national electrical safety code nesc design considerations as applied to utility substations, including working clearances, cable tray, cables, conduit, conduit fill, and station services in electrical equipment enclosures. It details the electrical hazards which must be managed to ensure the safety of personnel when working in switchyards, substations, high voltage areas including cable tunnels, general.
Fires can occur in substations due to copper theft. Applying the national electrical code to substations. Electrical substation simple english wikipedia, the free. Safety factors to consider for substation accessibility. Electric power may flow through several substations between generating plant and consumer, and may be changed in voltage in several steps. Personnel protection most company policies require you to notify the dispatch center or substation owner before entering and leaving a substation, which is a good industry practice for several reasons. To preset protection trip curves when protection discrimination is mandatory. Electric substation ppe safety toolbox talks meeting topics. Safety related, distributed functions in substations and the.
The document describes instructions for general work in substations and is complementary to the power system safety rules, advising on how to apply these principles for different types of work. Substations transform voltage from high to low, or the reverse, or perform any of several other important functions. Installations meeting the ansi provisions comply with paragraph b of this section. Electrical safety new mexico public regulation commission. Read online practical electrical substation safety for engineers.
Showing the single result substation safety survey. Apr 20, 2017 is there any safety requirements in using an electrical cords inside the substation. Accessibility is a key aspect that heavily influences the security of the substation, its infrastructure, and the safety of its occupants. This document supports the power system safety rules and its requirements assembled under high. The type of fflame retardant colthing that will be required will. Y is protective grounding equipment provided and capable of carrying the maximum fault current that could flow at the point of grounding. The manual is a modest attempt to formulate safety guidelines for ehv substations and. Exercise 5 you are required to do some maintenance work in an electrical substation. Our 2day substation training course will cover the major elements that build electrical substations and switchyards. When a highvoltage cable is terminated for a connection to a circuit or equipment in a substation or switchyard, the termination must also be made to exact specifications. American national standard national electrical safety code, ansiieee c22012 contains guidelines for the dimensions of access and working space about electric equipment in substations. The station may consist of transformers, switches, circuit breakers and other auxilliary equipment.
Voltages at transmission substations, highvoltage electricity passes through a transformer. Design guide for rural substations usda rural development. Fortunately, substation construction standards and the national electrical safety code have changed over the years to help reduce hazards. Safety requirements for work on or adjacent to the distribution. Iec 61850 is intended to replace all wires by serial communication. An ageold joke in the north american power industry states that if alexander graham bell walked in the room today, he would not recognize the telephone, the technology, or its business model. Lets take a look at some of the important safety measures that can minimise highrisk security threats commonly encountered in substations. Electricity is generated in a thermal power plant, hydroelectric power plant, and nuclear power plant, etc. The power transformer, circuit breaker, busbar, insulator, lightning arrester are the main components of an electrical substation. Safety practice regulations of revisions, amendments, and interpretations of the regulations. Substation safety equipment electrical safety solutions. Distribution voltages are typically medium voltage, between 2. Introduction to substations annotated instructors 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.
A substation presents an inherent safety hazard because usually only some portions of the substation apparatus can be deenergized for maintenance. Ppt what is a substation powerpoint presentation free. Electrical substation safety tips laclede electric. Substation construction manual i reference ni000401r122 ver 3 ergon energy corporation limited abn 50 087 646 062 ergon energy queensland pty ltd abn 11 121 177 802 revision history version description of change date 1 initial version 250320 2 content revised and additional content added, including safety. Electrical safety handbook for emergency responders this handbook was prepared by hydro one networks inc. So, the safety manual is prepared on the basis of power safety rules handbook and gerc power system safety standard by making necessary modifications. Substation substation a station in the power transmission system at which electric power is transformed to a conveniently used form. This substation training course give an overview of substations, primary breaking device, transformer, secondary switching devices. Use of gfci would be recommended depending on the equipment you are using. Tennet attaches great importance to the safety and environmental protection of its future substations, and as such aims to achieve the following. Safety equipment keep your substations in compliance special regulatory signaling the standard recommends the following signaling in substations. You are a panel builder, electrical calculation tools can help you. Distribution substations michigan technological university.
This introduction is not part of ieee p80d5, draft guide for safety in ac substation grounding. While most of the safety practices stem out of common sense and practical learning, some potential problem areas may skip attention. This course provides an introduction to electrical safety when working around substations and switchgear. Posted on july 18, 2018 by byron dudley 0 comments. Personal protective equipment is a very important part of substation safety. This can increase the hazards to entrants since switches and equipment can operate without warning.
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