The function of the electric power distribution system in a building or an. In most home wiring situations, you will probably only find three kinds of light switches. The operation and arc extinction of different types of circuit breakers were. Efacec switchgear has a range of solutions for primary distribution with the following characteristics.
In the first chapter, lets talk about the definition of electrical switchgear. Scribd is the worlds largest social reading and publishing site. In this construction, nontype tested arrangements need to be derived eg, by calculation etc from type tested. A block is connected to switchgear power bus and to output cables by terminal clamps. It covers electrical panelboards, switchboards and switchgear operating at 600 volts alternating current ac or direct current dc or below. It is interesting to note that relay performs the function of detecting a fault.
A switchgear is a generic term which includes all the switching devices associated with power system protection. Technical guide the mvlv transformer substations abb group. Complete the record sheet in the back of this booklet and submit it as instructed by county 4h youth educator or 4h electric leader. This low voltage training course aids in your employees understanding of the operation, maintenance, troubleshooting and application of low voltage distribution panels and systems, which is critical for any facility.
For those who dont know, electrical switchgear sometimes just called switchgear is a fairly broad, generic term that includes a variety of switching devices used to protect your power system from overloads. Switchgear introduction email 1591 905 tweet for panel builders, being flexible is crucial. The role of the switchgear is to distribute electricity safely and efficiently to the various electrical closets throughout the building. This circuit breaker uses both sf 6 and air as insulation. It also includes all devices associated with control, metering and regulating of electrical power systems. Switchgear units range from the small, moldedcase circuit breakers in a household panel board to the huge, air break switches on 750kv transmission lines. A good video on switch gear applications, manufacturing, standards and bout some of giant manufacturers. The power system should be designed and managed to deliver this energy to the utilization points with both reliability and economically. Fundamentals of electrical substations and switchgear.
Electrical fundamentals elearning electrical distribution fundamentals s009ac 39 electricity. When specifying and planning medium voltage switchgear for a substation, functions and influencing factors must be matched and an economically efficient solution must be found among the offerings of manufacturers. The largest collection of symbols in the network in pdf format. A complete switchgear means, assembly of required switching devices, protection device as well as metering device.
Basics 11 mov schematic with block included basics 12 12208 vac panel diagram. Pdf ch 16 introduction to switchgear andebo hillary academia. Ring main unit,rmu is a compact, enclosed and sealed type of switchgear used for medium voltage power distribution. This handbook provides general guidelines for the proper maintenance of electrical switchgear used in postal facilities. In an electric power system, switchgear is composed of electrical disconnect switches, fuses or circuit breakers used to control, protect and isolate electrical equipment. The switchgear works as a connection node between the outgoing distribution feeders and the infeeding power transformers. Pioneer and technology leader driving gis innovations. Vacuum interrupters design applications and limitations. Typical electrical drawing symbols and conventions. Medium voltage switchgear assembly a medium voltage switchgear assembly is an integrated combination of a number of compartments. For those who do not know, electrical switchgear is a broad term. Now, without further ado, lets start discussing the basics of electrical switchgear.
The term switchgear is a generic term that includes a wide range of switching devices like circuit breakers, switches, switch fuse units, offload isolators, hrc fuses, contactors, miniature circuit breakers, elcbs, gfcis etc. Design and installation of medium voltage switchgear facts. Basic substation layout incoming subtransmission lines electric power path through substation outgoing distribution lines lightning arresters airbreak switches stepdown transformer distribution bus cutout switches oil circuit breaker voltage regulators metalclad switchgear control house. Basic principles the best distribution system is one that will, costeffectively and safely, supply adequate electric service to both present and future probable loadsthis section is intended to aid in selecting, designing and installing such a system. His law ohms law stated that current is directly proportional to voltage and inversely proportional to. Switches a switch is a device which is used to open or close an electrical circuit in a. Jan 17, 2018 ring main unit,rmu is a compact, enclosed and sealed type of switchgear used for medium voltage power distribution. Low voltage circuit breakers design and construction basics.
Electrical protection the aim is to avoid or to limit the destructive or dangerous consequences of excessive shortcircuit currents, or those due to overloading and. Switchgear provides equipment protection for transformers, lines, cables, and capacitor banks used to energize and deenergize capacitor banks and other circuits switchgear includes. Introduction of indoor switchgear advantages and limitations of indoor switchgear. A block is connected to switchgear power bus with connectors and to output cables with a dismountable plugsocket connection with a socket installed on a block. Control compartment area doors available for device mounting e.
Indoor load break switch, disconnector and accessories. May 20, 2018 in this video i have explained about the wiring and working of main lt switchgear distribution panel. Switches a switch is a device which is used to open or close an electrical circuit in a convenient. Equipped with a vacuum circuit breaker with high electric and mechanical. By extension then, the definition could also include devices used to regulate, meter, and control your. Despite the many switch types, they have basic components in common. In this video i have explained about the wiring and working of main lt switchgear distribution panel. Sep 10, 2019 electrical power system by jb gupta is very useful for basics ideas of power system and best for competitive exams and topics are covered in sufficient details.
A circuit breaker is a switchgear which can open or close an electrical circuit under. The most common construction with the switchgear is an indoormounted metalenclosed one. Electrical switchboards design basics dara switchboards by shanaka unantenne tuesday, 08 september, 2015. Assembly of such devices in a logical manner forms switchgear. Depending on the certifying organization, these courses may be. The lowresistance metal contacts make or break the electrical circuit. To set up this control system a wide range of technology is needed and this chapter is split into the four main subdivisions of low voltage, medium voltage distribution system, high.
May, 2002 basics of electrical switches a switch is an electromechanical device that completes or breaks a current path within a circuit, or sends current over a different path. Depending on the function performed, it can be defined as a transforming. Power distribution systems electrical and industrial. This selfstudy curriculum includes courses on electricity, controls, ac motors, and power distribution products. Switchgear and protective devices 2015 6 p a g e 1. Jan 21, 2015 a good video on switch gear applications, manufacturing, standards and bout some of giant manufacturers. A german mathematician, george simon ohm, formulated this relationship in the 19th century.
A section of a large switchgear panel, in this case, used to control onboard casino boat power generation. Aug 24, 2017 switchgear is the combination of electrical disconnect switches, fuses or circuit breakers used to control, protect and isolate electrical equipment from the abnormal condition is called switchgear. Low voltage training course lp management services. Rmu of different voltage mostly 12 kv and 24 kv and current ratings are. Switchgear main lt distribution panel making and wiring step. It includes switches, fuses, circuit breaker, relays. Specific models of switchgear apparatus are not described in detail because of the large variety of models available. Hope you found this video very useful to learn electrical infinite hit subscribe. The switchgear equipment is essentially concerned with switching and interrupting currents either under normal or abnormal operating conditions.
Learning the basics k001ac 40 high power medium voltage and low voltage switchgear k002ac 41 electricity. The basics of primary medium voltage switchgear eep. The apparatus used for switching, controlling and protecting the electrical circuits and equipment is known as switchgear. Apr, 2017 switchgear the apparatus used for switching, controlling and protecting the electrical circuits and equipment is known as switchgear. Low voltage training switchgear low voltage training course length is customizable based on your needs. When trying to find a wiring diagram for a light switch, you first have continue reading. Rather, maintenance information is presented for five classes of switchgear equipment.
Primary medium voltage switchgear represents an important part within the primary distribution substation functionality. Ring main unit rmu introduction electrical concepts. This manual is intended as a guide for electrical engineers and designers hereafter referred as the ae for the planning and design of the electrical power distribution and related systems. Switchgear the apparatus used for switching, controlling and protecting the electrical circuits and equipment is known as switchgear. They are generally divided into the four groups of disconnect or isolator switches, load break switches, circuit breakers, and contactors. Apr 10, 2019 if just one switch controls the light, buy a singlepole dimmer. Getting to know mv and lv switchgear k002ac 45 electricity. The apparatus used for controlling, regulating and switching on or off the electrical circuit in the electrical power system is known as switchgear. Learning the basics of medium voltage distribution m030ac 42 medium voltage industrial installation design a001tc 43 protection. In other words systems used for switching, controlling and. Jan 08, 2018 switchgear mainly applied in electrical circuits and systems from low voltage like domestic 220240v applications to transmission networks up to 1100 kv. Basics of electrical switches a switch is an electromechanical device that completes or breaks a current path within a circuit, or sends current over a different path. Switchgear mainly applied in electrical circuits and systems from low voltage like domestic 220240v applications to transmission networks up to 1100 kv. Pdf electrical power system by jb gupta pdf download.
For consultation and interpretation of components, devices and electrical and electronic circuit. The information is intended to help readers understand the purpose of electrical distribution systems and associated equipment and increase their technical knowledge about it. With a wide and complete portfolio of high and medium voltage products, efacec switchgear is recognized for its expertise in terms of. In this article, we are going to study the basics of low voltage circuit breaker design and construction. By extension then, the definition could also include devices used to regulate, meter, and control your power system. Fundamentals of electricity there is a definite relationship between the three primary electrical characteristics. Electrical safety in the workplace 2 course goal the aim of this program is to provide comprehensive onsite training to highrisk workers i. That is certainly true when designing and working with medium voltage mv networks, or distribution systems with voltages above 1 kv and up to as much as 52 kv. The equipment has numerous safety features including circuit breakers, which allow power to be disrupted downstream this may occur due to a fault or problem, but it can also be done intentionally to allow. Gasinsulated highvoltage switchgear gis is a compact metal encapsulated switchgear consisting of highvoltage components such as circuitbreakers and disconnectors, which can be safely operated in confined spaces. Ms28 handbook maintenance of electrical switchgear tl4. Download link is provided and students can download the anna university ee6702 protection and switchgear ps syllabus question bank lecture notes syllabus part a 2 marks with answers part b 16 marks question bank with answer, all the materials are listed below for the students to make use of it and score good maximum marks with our study materials. Electrical power system by jb gupta is very useful for basics ideas of power system and best for competitive exams and topics are covered in sufficient details.
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