Some equipment also requires grounding as an essential component for operation, as it serves as a reference point for various. The issues of electronic equipment grounding at the power. The grounding and bonding of equipment in industrial and commercial power systems is covered in this recommended practice. Industry is hesitant to depart from power system design practices influenced by the economic concerns and technology of the post world war ii period. The checklists are in pdf format and can be completed electronically or printed and used as hard copy. Grounding of industrial and commercial power systems a pdh. Ge power is a world leader in power generation and water technologies for utilities, independent power producers and industrial applications.
Ge, is a worldleading provider of commercial and military jet engines, avionics, digital solutions and electrical power systems for aircraft. Standard for an electrical preventive maintenance epm program page 210 andor connectors are used together, examine connections for signs of galvanic action. Overview of grounding for industrial and commercial power systems. The modernization of industrial power systems has been stifled by industrys acceptance of extremely outdated practices. The national electrical code nec defines system ground as a connection to ground from one of the currentcarrying conductors of an electrical power system or of an interior wiring system, whereas an equipment ground is defined as a connection to. Resources for electrical engineers gp technologies ltd. Wires, fittings, and switches are necessary for making repairs to electrical systems. Most loads expect a certain voltage and, for alternating current devices. Article 250 covers the grounding requirements for providing a path to the earth to reduce overvoltage from lightning, and the. Ieee std 11001992, ieee recommended practice for powering and grounding sensitive electronic equipment the ieee emerald book. Standard for testing specifications electrical power.
While it is an autonomous segment of the general electric company, it can call on the many other departments and laboratories of the company. The larger the apparatus which supplies electric power t o the system, the. Use the metallic feeder conduit as the equipment grounding system for grounding the ac power panel frame, metallic conduit system, and metallic junction boxes. All noncurrentcarrying metal enclosures for electrical equipment or wiring must be grounded. Power meters power monitoring systems electro industries. Our portfolio includes gas and steam turbines, distributed power, wind and renewable energy, nuclear energy, and water processing technologies. The larger the apparatus which supplies electric power to the system, the. The fundamentals of making the interconnection of a ground conductor system between electric equipment and the ground rods, water pipes, etc. The equipment grounding conductor provides a low resistance path for the fault current. Characteristics of different power systems neutral grounding.
I found this book useful to understand the fundamental. Figure 3 depicts the same appliance with an equipment grounding conductor connected to the metal chassis. Both experienced electricians as well as people new to the national electrical code nec will benefit from this practical and indepth training. System neutral grounding and ground fault protection, westinghouse electric corporation, newark, nj, industrial and commercial power systems series prsc4b, 1979. The system grounding arrangement is determined by the grounding of the power source. Industrial power systems crc press book the modernization of industrial power systems has been stifled by industrys acceptance of extremely outdated practices.
Ensure that the connectors are properly used and installed in accordance with manufacturers specifications. Abbs electrification business has always been at the forefront of innovative electrification and today is writing the future of safe, smart and sustainable electrification. Numerous and frequentlyupdated resource results are available from this search. Pdf characteristics of different power systems grounding. Pierre, ieee std 80, and soares grounding books are referenced in the course and can be ordered online. Power systems grounding problems cause unexplained system outages. Electrical equipment and products grainger industrial supply. Azima provides technologypowered, data driven predictive maintenance services to hundreds of leading companies in twelve different industries, all over the world. An introduction electrical and computer engineering r. Connecting the frames and enclosures of electric apparatus, such as motors, switchgear, transformers, buses, cables, conduits, building frames, and portable equipment, to a ground system is. Since 1989, revised editions of the maintenance testing specifications have been published in 1993, 1997, and 2001.
Nfpa 70 national electrical code 1 article 250 provides information on system grounding. Overview of grounding for industrial and commercial power. Since some years ago, i have been looking for the g. In any discussion of the grounding of electrical systems, particularly as it applies to power systems, there also needs to be a consideration of how the grounding system relates to overcurrent protection. Industry is hesitant to depart from power system design practices influenced by the economic concerns and. Our wifibased power monitoring system also provide superior submetering performance to capture energy metering data. Industrial power systems 1st edition shoaib khan sheeba khan. In some regions, the 4wire plus ground system is referred to as a 5wire electrical system. Grounding is critical for the protection of electrical equipment and the safety of workers. Ge industrial power system data book electric power. Electrical distribution equipment in data center environments. Electrical products and power management supplies can be used to run equipment and install electrical systems into buildings.
Overview of grounding for industrial and commercial power systems presented by robert schuerger, p. This device, designed to simulate shortcircuit conditions in network power systems, wag superceded in 1923 by the 60 cycle ac network analyzer developed in cooperation with the massachusetts institute of technology. Television station planning 1951 pdf at help with reading books report a bad link suggest a new listing. Motor installation and maintenance instructions gei 56128h. Many utilities have multiple voltages as shown by the survey data in. Isolated ground bar available interior removes and reinstalls easily combination slottedrobertson screws speed wiring all neutral holes rated for 144 wire. Where an industrial power system includes powergenerating equipment, the reasons for.
At the micros equipment panel, install a ground bus that is electrically isolated from the panel frame, and then terminate the feeder equipment grounding conductor on this bus bar. Shields is a comprehensive study guide for the design of industrial and commercial electrical power systems as dictated by neutral grounding and groundfault protection practices. Equipment grounding means a continuous copper conductor connected between the grounding electrode rodgrid connection, at the source transformer, and at each enclosure and equipment frame. Determining x and r values from transformer loss data. Ieee recommended practice for grounding of industrial and commercial power systems. In the event that a ground fault condition exists, the hrg typically limits the current to. Ieee std 11001992, ieee recommended practice for powering. In 2005, this document was approved for the first time as an american national standard. To provide adequate current carrying capability, both in magnitude and duration, to accept the groundfault current permitted by the overcurrent protection system without creating a fire or explosive hazard to building or contents. Oclcs webjunction has pulled together information and resources to assist library staff as they consider how to handle coronavirus. A grounding electrode conductor, sized in accordance with 250. Ge is the worlds digital industrial company, transforming industry with softwaredefined machines and solutions that are connected, responsive and predictive. Equipment grounding and system grounding requirements the enphase m250, m215 m215602llsxxig, and c250 fourth generation microinverters meet the requirements of the national electrical code article 690. However, the proper power quality, grounding and earthing become the necessity for their smooth functioning.
Standard for an electrical preventive maintenance epm. Industrial power system grounding design handbook j. Eep electrical engineering portal energy and power for all. In most cases, to best serve the purpose of a grounding system, the design should be situation specific. This method was adapted by one very large industrial company in 1935 for their older plants. A wikipedia article about this author is available general electric company. Facility and equipment grounding to enhance equipment performance 2011 course. Industrial power system grounding design handbook by j. Electrical distribution equipment in data center environments revision 2 by pearl hu.
However, formatting rules can vary widely between applications and fields of interest or study. Purchase of these books and standards is not required for the course. There are also a number of misconceptions that affect how a ground system works. Grounding earthing european convention establishing a bond to earth at the facility service entrance for the electrical distribution system.
Actual case studies and inclass exercises provide knowledge needed for solving grounding problems, designing new systems or maintaining existing facilities. Article 250 grounding and bonding mike holt enterprises. Grounding keeps devices safe from surges, lightning, and faults. The soares grounding book 2017 should be ordered from iaei. Grounding system theory and practice ced engineering. An electric power system is a network of electrical components deployed to supply, transfer. Earthing grounding of power electronic and distributed. Ieee recommended practice for grounding of industrial and commercial power systems ieee green book institute of electrical and electronics engineers on. Information is given on how to ground the system, where the system should be grounded, and how to select equipment for the ground of the neutral circuits. The interconnection and grounding of the non electrical metallic elements of a system is covered first. In this white paper, learn how you can configure freely. The modernization of industrial power systems has been stifled by industrys.
Principles of electrical grounding john pfeiffer, p. Grounds electric company, has extensive experience in the design and installation of sophisticated power, lighting, control, life safety, security and communications systems for commercial, industrial and health care facilities. Eep electrical engineering portal is leading education provider in many fields of electrical engineering, specialized in high, medium and low voltage applications, power substations and energy generation, transmission and distribution. Ge industrial systems general electric company 41 woodford avenue, plainville, ct 06062. To make it easier to explore our full offerings, geindustrial. This document contains proprietary information of general electric company, usa and is furnished to its.
Apply an antioxidant compound to all aluminumto copper connections. Shields is a comprehensive study guide for the design of industrial and commercial electrical power systems as dictated by neutralgrounding and groundfault protection practices. Electrical equipment supplies power to facilities and work projects. The books industrial power system grounding design handbook by dunkijacobs, f. The latter part of this paper provides a general algorithm for designing of grounding power systems. Pdf industrial power systems handbook donald beeman ivan. How electronic tubes work c1944 pdf at general electric company. Ieee recommended practice for grounding of industrial and commercial. The issues of electronic equipment grounding at the power facilities international journal of research studies in electrical and electronics engineering ijrseee page locations, but interconnected through data channels and electric cables. The choices of data and examples in khans book ensure that the engineer. Enphase grounding and the 2011 national electrical code equipment grounding and system grounding requirements the enphase m250, m215 m215602llsxxig, and c250 fourth generation microinverters meet the requirements of the national electrical code article 690.
A grounding analysis will determine if your equipment has proper ground fault protection installed and operating. This is the most critical concept in equipment grounding. Ieee recommended practice for grounding of industrial and. Built for the digital industrial era and the outcomes that matter most products. Graybar is engaged in the distribution of electrical, telecommunications and networking products and integrated supply services primarily to contractors, industrial plants, telephone companies, power utilities, commercial and government buyers. Introduction to protective device coordination analysis. This data book is the property of the general electric. Effort is made to classify and compare several grounding designs.
The definition of grounding is commonly used for both, system grounding and equipment grounding. Power system grounding training the electricity forum. Industrial power systems handbook donald beeman electric. Grounding of industrial and commercial power systems. Ieee std 1422007 revision of ieee std 1421991 ieee. There, the outstanding minds in their fields can apply their particular knowledge toward making general electric. Ac rival, the thomsonhouston electric company, forming general electric. General electric, 1955 electric power distribution. In some very large systems where the highvoltagesystem neutral is solidly grounded. This content was uploaded by our users and we assume good faith they have the permission to share this book. Equipment grounding equipment grounding must comply with the national electric code nec article 250. The interconnection and grounding of the nonelectrical metallic elements of a system is covered first. A unit or equipment is a combination of two or more components, appro.
Industrial power system grounding design handbook john. In this white paper, learn how you can configure freely without requiring any custom development, and quickly update configurations as your needs evolve. This pdf contains 77 electrical inspection checklists taken from the 2014 electrical inspection manual with checklists. Facility and equipment grounding to enhance equipment.
High resistance grounding systems high resistance grounding hrg systems limit the fault current when one phase of the system shorts or arcs to ground, but at lower levels than low resistance systems. Find out how your company can benefit from plm built on salesforce. Equipment, buildingspremises and personnel safety are of. The general electric computer department is really many departments. Equipment grounding means a continuous copper conductor connected between the grounding electrode rodgrid connection, at the source. Hp critical facility services delivered by eyp mcf slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. For commercial and industrial systems, the types of power sources generally fall into four broad categories. Ieee recommended practice for grounding of industrial and commercial power systems ieee green book. The power electronic systems generate emi or noise and can affect other electronic equipment in vicinity. However, the size of t,he power system back of the circuit. Electrical power systems quality, second edition contact gce. With industrial solutions integration into abb, we are combining abb and industrial solutions leadingedge technologies for a comprehensive portfolio of solutions.
Ge industrial power system data book scottyuk electrical 12 jan 15 06. While, the power electronic systems pes handle low to high powers based on different applications, the distributed control systems dcs handle relatively low powers or rather require low power for their functioning. Ge introduces new company to develop next generation. This guide presents the fundamentals of power system design for commercial and industrial power systems.
The first neta maintenance testing specifications for electrical power equipment and systems was published in 1975. Pcore is the leading manufacturer of high voltage condenser bushings for power transformers and oilfilled circuit breakers. A utility service the system grounding is usually determined by the secondary winding configuration of the upstream utility substation transformer. All products sold by graybar are purchased from other companies. Commercial, industrial, and utility grounding systems. Grounding of industrial and commercial power systems soil type vs. Donald beeman, industrial power systems handbook, 1st edition, mcgrawhill book.
On the other side, the distributed control systems are more vulnerable to emi or noise effects and can easily maloperate due to its presence. Azima is a fastgrowing hightech company that maximizes industrial productivity. Discover everything scribd has to offer, including books and audiobooks from major publishers. So, if only thc load currcnts arc considered when selecting motor branch circuit break ers, a 15 or 20amp circnit, breaker wnuld he specified. Smaller power systems are also found in industry, hospitals, commercial. Electric power hazardous energy control portable grounding equipment hazardous energy control portable grounding equipment portable grounding cables and clamps must be able to carry and withstand the maximum fault current available for the time needed for an overcurrent device to trip. Typical electrical equipment life expectancies 7 24 march 2016 reference ieee gold book recommended practice for the design of reliable industrial and commercial power systems equipment expected useful life, years capacitors 17 lv molded case circuit breakers 20 lv power circuit breakers 1520 mv power circuit breakers 1520. This 12hour course provides for the study of recommended practices for grounding of electrical systems and the several methods and criteria that exist for power system grounding.