Switchgear the apparatus used for switching, controlling and protecting the electrical circuits and equipment is known as switchgear. 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. A block is connected to switchgear power bus and to output cables by terminal clamps. Switchgear provides equipment protection for transformers, lines, cables, and capacitor banks used to energize and deenergize capacitor banks and other circuits switchgear includes. The function of the electric power distribution system in a building or an. Switchgear mainly applied in electrical circuits and systems from low voltage like domestic 220240v applications to transmission networks up to 1100 kv. Primary medium voltage switchgear represents an important part within the primary distribution substation functionality. Learning the basics k001ac 40 high power medium voltage and low voltage switchgear k002ac 41 electricity. Switchgear main lt distribution panel making and wiring step.
Depending on the function performed, it can be defined as a transforming. A complete switchgear means, assembly of required switching devices, protection device as well as metering device. Efacec switchgear has a range of solutions for primary distribution with the following characteristics. Pdf ch 16 introduction to switchgear andebo hillary academia. Typical electrical drawing symbols and conventions. Switchgear introduction email 1591 905 tweet for panel builders, being flexible is crucial. Fundamentals of electricity there is a definite relationship between the three primary electrical characteristics. A section of a large switchgear panel, in this case, used to control onboard casino boat power generation. By extension then, the definition could also include devices used to regulate, meter, and control your power system. 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. In this construction, nontype tested arrangements need to be derived eg, by calculation etc from type tested.
Design and installation of medium voltage switchgear facts. Equipped with a vacuum circuit breaker with high electric and mechanical. 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. May 20, 2018 in this video i have explained about the wiring and working of main lt switchgear distribution panel. Fundamentals of electrical substations and switchgear. 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. Ring main unit,rmu is a compact, enclosed and sealed type of switchgear used for medium voltage power distribution. 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. Switchgear and protective devices 2015 6 p a g e 1.
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. This handbook provides general guidelines for the proper maintenance of electrical switchgear used in postal facilities. Low voltage training course lp management services. It covers electrical panelboards, switchboards and switchgear operating at 600 volts alternating current ac or direct current dc or below. This selfstudy curriculum includes courses on electricity, controls, ac motors, and power distribution products. Scribd is the worlds largest social reading and publishing site.
The most common construction with the switchgear is an indoormounted metalenclosed one. 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. The apparatus used for switching, controlling and protecting the electrical circuits and equipment is known as switchgear. The basics of primary medium voltage switchgear eep. Apr, 2017 switchgear the apparatus used for switching, controlling and protecting the electrical circuits and equipment is known as switchgear. 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.
The information is intended to help readers understand the purpose of electrical distribution systems and associated equipment and increase their technical knowledge about it. Assembly of such devices in a logical manner forms switchgear. This circuit breaker uses both sf 6 and air as insulation. Ring main unit rmu introduction electrical concepts.
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. A switchgear is a generic term which includes all the switching devices associated with power system protection. Power distribution systems electrical and industrial. 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. In this article, we are going to study the basics of low voltage circuit breaker design and construction. Apr 10, 2019 if just one switch controls the light, buy a singlepole dimmer. The largest collection of symbols in the network in pdf format. A circuit breaker is a switchgear which can open or close an electrical circuit under. Learning the basics of medium voltage distribution m030ac 42 medium voltage industrial installation design a001tc 43 protection. 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.
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. In the first chapter, lets talk about the definition of electrical switchgear. 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. Electrical safety in the workplace 2 course goal the aim of this program is to provide comprehensive onsite training to highrisk workers i. Control compartment area doors available for device mounting e. It includes switches, fuses, circuit breaker, relays. 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. Indoor load break switch, disconnector and accessories. Technical guide the mvlv transformer substations abb group. Low voltage circuit breakers design and construction basics. The switchgear works as a connection node between the outgoing distribution feeders and the infeeding power transformers.
It also includes all devices associated with control, metering and regulating of electrical power systems. Rmu of different voltage mostly 12 kv and 24 kv and current ratings are. Ms28 handbook maintenance of electrical switchgear tl4. Getting to know mv and lv switchgear k002ac 45 electricity. By extension then, the definition could also include devices used to regulate, meter, and control your. The lowresistance metal contacts make or break the electrical circuit. Introduction of indoor switchgear advantages and limitations of indoor switchgear. 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.
Hope you found this video very useful to learn electrical infinite hit subscribe. In an electric power system, switchgear is composed of electrical disconnect switches, fuses or circuit breakers used to control, protect and isolate electrical equipment. Now, without further ado, lets start discussing the basics of electrical switchgear. Specific models of switchgear apparatus are not described in detail because of the large variety of models available. Depending on the certifying organization, these courses may be. Jan 21, 2015 a good video on switch gear applications, manufacturing, standards and bout some of giant manufacturers. 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. Electrical fundamentals elearning electrical distribution fundamentals s009ac 39 electricity. In most home wiring situations, you will probably only find three kinds of light switches. In this video i have explained about the wiring and working of main lt switchgear distribution panel.
The apparatus used for controlling, regulating and switching on or off the electrical circuit in the electrical power system is known as switchgear. The switchgear equipment is essentially concerned with switching and interrupting currents either under normal or abnormal operating conditions. With a wide and complete portfolio of high and medium voltage products, efacec switchgear is recognized for its expertise in terms of. Jan 17, 2018 ring main unit,rmu is a compact, enclosed and sealed type of switchgear used for medium voltage power distribution. Low voltage training switchgear low voltage training course length is customizable based on your needs. The operation and arc extinction of different types of circuit breakers were. Switches a switch is a device which is used to open or close an electrical circuit in a convenient. Switchgear units range from the small, moldedcase circuit breakers in a household panel board to the huge, air break switches on 750kv transmission lines. Pdf electrical power system by jb gupta pdf download.
Vacuum interrupters design applications and limitations. 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. 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. Pioneer and technology leader driving gis innovations. They are generally divided into the four groups of disconnect or isolator switches, load break switches, circuit breakers, and contactors. The role of the switchgear is to distribute electricity safely and efficiently to the various electrical closets throughout the building. For consultation and interpretation of components, devices and electrical and electronic circuit. It is interesting to note that relay performs the function of detecting a fault. 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. Rather, maintenance information is presented for five classes of switchgear equipment.
A german mathematician, george simon ohm, formulated this relationship in the 19th century. His law ohms law stated that current is directly proportional to voltage and inversely proportional to. Electrical switchboards design basics dara switchboards by shanaka unantenne tuesday, 08 september, 2015. The power system should be designed and managed to deliver this energy to the utilization points with both reliability and economically. Complete the record sheet in the back of this booklet and submit it as instructed by county 4h youth educator or 4h electric leader. Switches a switch is a device which is used to open or close an electrical circuit in a. A good video on switch gear applications, manufacturing, standards and bout some of giant manufacturers.
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