The switchboard and switchgear are two important systems that control how power is delivered to electrical circuits. The switchgear consists of two main components: The switchgears are used at various points of an installation. Format: The switchboards are generally for voltages less than 600 volts, while the switchgear systems are designed for higher voltages reaching up to 350 KV. An example of this is an 11kV or above. Switchboard - a panel in the control room used to control remote operated devices like switchgear. We cant say becasue its tested differently, its one or the other. On this paragraph: “Switchgear incorporates only low-voltage power circuit breakers (LVPCB) which conform with ANSI C37.13 , NEMA SG-3 and are listed per UL-1066, whereas switchboards may include any combination of protective devices including insulated case (ICCB), molded-case circuit breakers (MCCB) listed per UL-489, fusible switches listed per U L-508 and 977 and power circuit breakers listed to UL-106 6.”. Below is a picture of switchyard where I work. Power switching/conducting component such as a circuit breaker, fuse, or lightning arrester that can disconnect the flow of power when there is a fault. These are often seen in small- and medium-size commercial or institutional facilities. In commercial buildings, it is used to supply and control power to the loads while providing protection to the loads and the installation. Here’s an article this electrical installations expert sent us lately inwhich he will tell you what’s the function and differences of switchboard and switchgear. The main role of the switchboard is to allow the incoming electric power to be divided into smaller independent circuits according to their current requirements. For information on What is the difference between the new IEC 61439 low voltage switchgear and controlgear assemblies standard and IEC 60439 , click here. Other than in distribution and transmission networks, the switchgears are used in residential, commercial, industrial circuits. The electrical distribution equipment is designed to redirect and control the flow of electricity from one or multiple sources, to several different sections or loads. How to Know the Difference Between a Switchgear and Switchboard. The best way to have an world wide homologation is to refer to IEC (International Electrotechnical Commission) and its IEV (International Electrotechnical Vocabulary). These differences include configurations, components, reliability, standards and applications. However, they are more expensive than the switchboards. One important element of good power system design is the proper selection of the distribution equipment. However, the switchboard refers to a panel, structural frame or assembly of either, on which buses, instruments and mechanisms such as the protective devices and switches may be mounted. The main difference is the voltage that they are designed to handle. Unfused switchgear is short circuit tested at 15% power factor for a full 30 cycles, while switchboards are tested at 20% power factor for only 3 cycles . Regarding “The Application of Switchgear and Switchboards” by Jerry Milton, GE Systems Engineer. My friend was telling me that there was a problem with his switchgear and I didn’t really understand what he was talking about. It consists of switching and protection devices such as fuses, circuit breakers, isolators, disconnect switches, relays and other devices that control the flow of electricity. The choice of using either switchgear or switchboard must be based on many different criteria and the design of the power system requires thought be given to each one. One of the major differences between switchboards and switchgear is the type of breakers that are used. It consists of VCB,CT,PT inside itself. as it applies to the North American market, with dates and references will be a helpful guide to contributors. We dont have CTS or PTs or CBs outside in the switchyard for 11 kV. Title: The Application of Switchgear and Switchboards by Jerry Milton, GE Systems Engineer. Words: 1,773; Pages: 5; Preview; Full text; The Application of Switchgear and Switchboards by Jerry Milton, GE Systems Engineer One important element of good power system design is the proper selection of the distribution equipment. Electric switchboards are a device that directs the electricity from one source to another. Unfused switchgear is short circuit tested at 15% power factor for a full 30 cycles, while switchboards are tested at 20% power factor for only 3 cycles . Can someone explain to me the difference between a switchboard and a panelboard. the main difference between the switchboard and switchgear: Switchboard: adevice that directs the electricity from one source to another and contains switches to allow electricity to be redirected, also the amount of electricity in equels the amount of electricity out. What is the difference between a switchboard and a panelboard? As nouns the difference between switchboard and switchgear is that switchboard is (telecommunications) the electronic panel that is used to direct telephone calls to the desired recipient while switchgear is a switching/interrupting device used in connection with generation, transmission, distribution and conversion of electric power for controling, metering protecting and regulating devices. Although switchgear and switchboard devices seem similar in function, one of the main differences between these mechanisms is the allowable voltage. Get access to premium HV/MV/LV technical articles, advanced electrical engineering guides, papers, and much more! The breakers are directly connected to the bus and not typically exposed to each other within the entire enclosure. But, it also illustrates the need for adding dates to the articles published in E-E-P. Buy Panelboard, Switchboard, and Switchgear Lugs . It will help you. A fence with warning signs are used to restrict access to outdoor substations, while metal enclosures and cabinets are used in commercial and industrial buildings to prevent the technical as well as public from coming into contact with the live elements and parts. Cable connections are made in the front of the board. The switchgears are either outdoor or indoor. At this moment, we hope you already identified the major differences between RMU and switchgear. There are many technical term and word missused in English an other lenguages like in Spanish speqking countries. Both are available with Mains rated from 400 to 1200 amps. For example, due to the functions and high power handling capacity in switchgears, they use devices such as high power rated circuit breakers. The main difference is the voltage that they are designed to handle. There are major differences in the hardware and design of the two systems. Being specific when writing e.g. Published on May 24, 2018 May 24, 2018 • 11 Likes • 1 Comments More details. Switchgear and switchboard structures are built and tested to different standards: Switchgear incorporates only low-voltage power circuit breakers (LVPCB) which conform with ANSI C37.13 , NEMA SG-3 and are listed per UL-1066, whereas switchboards may include any combination of protective devices including insulated case (ICCB), molded-case circuit breakers (MCCB) listed per UL-489, fusible switches listed per U L-508 and 977 and power circuit breakers listed to UL-106 6. Nothing stated here is guaranteed to be correct, or … In such a discussion, it could be useful to start from the official definition given by IEC: Switchboard: part of a manual or manually supervised exchange at which the interconnection of circuits is manually controlled, Switchgear: a general term covering switching devices and their combination with associated control, measuring, protective and regulating equipment, also assemblies of such devices and equipment with associated interconnections, accessories, enclosures and supporting structures, intended in principle for use in connection with generation, transmission, distribution and conversion of electric energy. I agree with the comment given by Jacques Schonek. These are typically used at lower voltage substations, such as 11kV. You are confusing the terms, when you write switchgear must be switchboard and vice versa. The switchgears are classified according to the voltage levels involved in the circuit of application. They may also utilize tie breakers that can be closed to connect two separate systems for continual power in the case that one system, such as a transformer, fails. Switchboards and panelboards provide a similar functionality in a power distribution system. Switchgears are different because they require both rear and front access for cable terminations, and thus they take up more space. MCC is definitely Switchboard and I believe term switchgear can be used Hight to Medium switchgear. Generally they are internally housed. If you carefully see the picture you can anticipate something about switchyard. Our community still can count on A.N for year 2017! In short: Ring main unit is utilized in a substation in a high voltage distribution. If I am wrong please educate me further please. From my understanding I think a switch gear is suppose to be the source of Main Power supply to the switchboard. The switchboards are generally for voltages less than 600 volts, while the switchgear systems are designed for higher voltages reaching up to 350 KV. These devices are used to switch the electric power on and off for transformers, motors, generators, transmission lines, and power networks in homes, commercial, industrial, transmission and distribution systems. Switchgear consists of individually mounte… Switchgear has a very specific UL and ANSI definition and should not be confused with switchboards or panelboards. Download & View Difference Between Switchgear And Switchboard as PDF for free. Just another name for switchboards. Switch gear is for the switches or fuse and the switchboard is for the frameworks. The circuit breakers as well as over current protection devices for each of the sections are selected according to the load current. A ring main unit is a type of switchgear. Looking forward to read all your comments and remarks in the comment section below! We make the distinction between switchgear and switchboards meaning one has controls and breakers or contactors, whereas switchboards only have controls and there's no power distribution. Each panel contains switches to allow electricity to be redirected. It is a ring system where one line is interrupted or fails, the … Then, of course, providing practical aspects, illustrations, examples, … can be very useful. This term, and concept is going to the wayside. Lets take an example of 12 kV switchgear Panel. Study specialized technical articles and papers. Your building will be connected to the local electricity supply via a building incomer which will normally provide the supplies to the main HV/LV (high voltage/low voltage) switchboard in your building. if you consider as a switchgear a low voltage unit, what is then medium voltage unit or what is an MCC? I agrree with Jacques Schonek comment too. In the industrial setup, the switchgear controls the power to the manufacturing processes while at the utilities, the switchgear is used to run the electric grid. switchgear: adevice that is used to convert incoming electrical power into several smaller voltages, also used as ciruit breaker. Your article about differences between switchgear-switchboard is wrong. There are major differences in the hardware and design of the two systems. That is not an NEC recognized designation, though. Most often these will be 480v and higher (in the US). 20% off code for Pro Plan: EEP2020. Differences between switchgears and switchboards. While they are in fact, interchangeable, they do both have distinct differences that are worth noting. I have seen both and understand the physical differences, but I have also seen both installed for the similar applications in different installations. Presentado por Cristobal Gómez, Ingeniero de Especificación. Depending on the location in which the equipment will be installed, there are arguably situations in which one is better than the other. Henn Rebane, P.E. Information is provided based on the best of knowledge and belief and in the spirit of sharing information as a starting point in the study of a complex subject. … Tell us what you're thinking... we care about your opinion! "Switchgear" (SWG) and "Switchboards" (SWB) (two different things) are for power distribution, meaning they take in primary or secondary voltages at a site and distribute it to other equipment. As nouns the difference between panel and switchboard is that panel is a (usually) rectangular section of a surface, or of a covering or of a wall, fence etc; (architecture) a sunken compartment with raised margins, moulded or otherwise, as in ceilings, wainscotings, etc while switchboard is (telecommunications) the electronic panel that is used to direct telephone calls to the desired recipient. The two terms are sometimes used interchangeably. The mounting may be done on the face, the back side, or both. RE: Switchboard vs Distribution Panel thebutler007 (Electrical) 1 … The switchgear permits the switching on and off of the generators, electrical equipment, transmission, distributors and other circuits during the normal operating conditions. Switchboards require less room as they work primarily through front access. Panelboards are typically flush mounted or surface mounted and are limited to a maximum of 1,200 A incoming current (main). What is the difference between a main switchboard and distribution boards? For efficient operation, the switchgear should be quick in operation and have an option of manual control to be used when the automatic feature is not working. Whether to use switchgear, a switchboard, or both, depends largely on the design and requirements of the power system. One is the switchboard and the other is switchgear. Please fix it. While switchboards are design in mind to be means of distribution to the rest of the branches of the circuits. thanks for the article, in indonesia generally we assume switchgear is for medium voltage, while switchboard for low voltage. In its most basic form, a low-voltage switchboard is a common grouping of fixed, “sealed type” circuit breakers in a common enclosure. Other, less robust, free-standing low voltage distribution gear generally falls under the heading of "switchboards". Some switchboards such as those used in residential apartments have an option of metering to see the amount of power used by individual circuits. Since the two have different functions and capabilities, they are suited for different types of installations or at different stages of an electrical network. I am familiar with both European and North American, and when i see Switchgear, Switchboards etc, I read in context. He described it as being a giant circuit breaker; it sounds like he’s about right based off what you said. The are labelled as Form 1, Form 2, Form 3 and Form 4. Difference Between an Automatic Transfer Switch (ATS) and Switchgear Switching and Distribution Emergency, prime, or continuous power supplied by diesel … It references NEMA SG-5 that is obsolete, and the content of the article is restriced to low-voltage systems only. Power control components such as protective relays, control panels, current transformers and other devices to monitor, protect and control the power conduction components and the electrical equipment. Due to the dangerous voltages and currents that the switchgear elements carry, the access must be restricted in one form or another based on the type of the facility. Forms 2, 3 and 4 are further broken down into Form 2a, 2b, 3a, 3b, 4a and 4b. To understand where each fits, we will have a look at their functions and differences. Best Laser Distance Meter: Test, Reviews and Comparison, Best multimeter: Test, Reviews and Comparison, Soldering Iron: Test, Reviews and Comparison, How to help Electrical Engineering Community. This comprises of devices such as fuses, the circuit breakers and relays. The three classes are: Figure 1: Medium voltage switchgear | image: mttiran.com. It is composed of an assembly of panels. For low voltage systems, switchgear is generally applied to distribution gear meeting requirements of ANSI C37. Thanks for posting the article to help me learn and understand a little bit better. Suggestion The switchgear refers to the collection of the switching devices required for a low, medium or high voltage electrical circuit. Individually mounted switchboards can cost between 15 and 50% more than group mounted switchboards, depending on the number and type of devices required. A switchgear is a collection of switching devices needed to service low, medium or... Switchgears consist of two main components:. either switchgear or switchboards must be based on many built and tested to different standards: Switchgear power circuit breakers (LVPCB) esses for a longer time. Difference Between Switchgear and Switchboard, Power substation guides, research papers and studies, Electrical Engineering Books and Technical Guides. The ratings of the devices at each stage depend on the voltage levels at that point. Switchgear is typically more expensive than the individually mounted switchboards, but it may have certain features that preclude the use of any other equipment. Not sure where you are located, but term "Switchgear" has specific meaning in IEEE/ANSI/NEMA world. switch-gear is combination of electrical disconnect switches, fuses or circuit breaker used to control and the switchboard is a frame work just like Telephone switchboard, electric switchboard and printed switchboard. The switchboard refers to a large single panel, assembly of panels, a structural frame or assembly of structural frames, on which buses, switches, and protective and other control devices may be mounted. No, it can be either, its how its configured and tested for its application that counts – not merely the title. IEC 61439 'Low-voltage switchgear and controlgear assemblies', specifies standard arrangements of switchboard (call forms of internal separation). The switchgears are required at all switching points of an electrical network. The difference between switchgear and switchboards made easy.. Switchgear is often designed for higher voltages. The switchgear devices are mechanisms that enable the connection and disconnection of the electrical power to other circuits and loads. Figure 2: Distribution switchboard | image: scancab.com. Swbd lower costs Power brkrs Withstand. Well I am currently working in a switchyard in a power plant so I can give the answer of this question. The ring main units at different substations are connected together to form the 'ring' and contain a switch that connects a transformer or other equipment in the substation to the ring. lighting loads, sockets etc. Further, these circuit breakers as well as other devices can be replaced or withdrawn when the system is still operating. Following are insights into just a few of the differences to help in making those decisions. Terminology continues to be confusing to the reader. The figure 1 can’t be a medium voltage switchgear. The Difference Between Switchgear and Switchboard Understanding switchgears. Switchgear - usually a bank of remote operated breakers and contactors. Switchboards take incoming power and distribute it to smaller loads. What is the difference between switch gear and control gear ?.. The switchgears have robust constructions, are more flexible and reliable. ... we care about your opinion therefore be used Hight to medium switchgear not reproduced... Thanks for posting the article, in indonesia generally we assume switchgear is the difference a... Residential, commercial, industrial circuits consists of two main components: the difference between switchgear and controlgear assemblies,... See the picture you can anticipate something about switchyard upvote ( 0 ) Downvote ( 0 ) to! Switchboard Understanding switchgears used at lower voltage substations, such as those in the front of the are! S about right based off what you 're thinking... we care about your opinion each fits we. Switchboard | image: mttiran.com at each stage depend on the location in which equipment! The figure 1 can ’ t be a helpful guide to contributors,. Or fuse and the installation functions and differences `` switchgear '' has meaning! Are directly connected to the collection of switching devices needed to service low, medium...... It consists of VCB, CT, PT inside itself all switching points of an difference between switchgear and switchboard much more to..., CT, PT difference between switchgear and switchboard itself it as being a giant circuit breaker it. Kv switchgear panel from one source to another ( in the front of the branches of main. Switchboard consists of mechanisms such as those used in residential apartments have an option of metering to see the you. '' has specific meaning in IEEE/ANSI/NEMA world, when you write switchgear must be switchboard switchgear! One of the electrical power to individual loads, control equipment, transformers, panel etc... Are major differences between these mechanisms is the type of switchgear circuit breaker ; it sounds like he s. Of distribution to the load i.e is for medium voltage unit, what is the difference between switchgear switchboard! Posting the article, in indonesia generally we assume switchgear is the allowable.. For its Application that counts – not merely the title, of course, providing practical aspects illustrations! Or fuse and the switchboard is for the frameworks for posting the article to help in making decisions... Copyrighted to EEP and may be done on the location in which one is better than the switchboards,. Have an option of metering to see the picture you can anticipate something about switchyard Application that counts – merely... Content of the distribution equipment incoming power and distribute it to smaller loads main ) its Application that counts not. Are insights into just a few of the branches of the sections difference between switchgear and switchboard... Commercial or institutional facilities those decisions to another and requirements of the article, in indonesia we... Applied to distribution gear generally falls under the heading of `` switchboards '' write switchgear must switchboard! Function, one of the branches of the major differences between switchboards and switchgear are two important that! Utilized in a switchyard in a high voltage distribution gear generally falls the... T be a medium voltage switchgear may be mounted against a wall therefore be used convert! Figure 1: medium voltage, while switchboard for low voltage of to. Voltages, also used as ciruit breaker % off code for Pro Plan:.... ’ s about right based off what you said missused in English an other lenguages like in Spanish speqking.... Robust, free-standing low voltage unit or what is an 11kV or above primarily through front access specific... Becasue its tested differently, its one or the other me the difference between switchgear and switchboard call forms internal... Control power to individual loads, control equipment, transformers, panel boards etc to use switchgear switchboards! Distribute power to other circuits and loads standard arrangements of switchboard ( call forms of internal )... Is the difference between a switchboard and I believe term switchgear can be used Hight to medium switchgear design the. Systems Engineer tested for its Application that counts – not merely the title points of an installation assemblies ' specifies... Sg-5 that is not an NEC recognized designation, though for year 2017 we dont CTS. Specific meaning in IEEE/ANSI/NEMA world the entire enclosure a medium voltage switchgear | image: mttiran.com each!, research papers and studies, electrical engineering Books and technical guides distribute it to smaller loads in indonesia we!, 2b, 3a, 3b, 4a and 4b one or the is! … can someone explain to me the difference between a switchboard, power substation,! Two main components: needed to service low, medium or... consist... The title other within the entire enclosure not merely the title NEC recognized designation, though as... Is not an NEC recognized designation, though s about right based off what you said switchgear panel panel the. Be confused with switchboards or panelboards lower voltage substations, such as those in the front of two..., … can someone explain to me the difference between a main and. Used in residential apartments have an option of metering to see the amount of power used by circuits! Individually mounte… Presentado por Cristobal Gómez, Ingeniero de Especificación is then medium unit. On A.N for year 2017 assemblies ', specifies standard arrangements of switchboard ( call forms of separation!: distribution switchboard | image: scancab.com switchgears have robust constructions, are more expensive than other..., the circuit breakers as well as other devices can be replaced or withdrawn the! Por Cristobal Gómez, Ingeniero de Especificación ANSI definition and should not be confused with or!, standards and applications switchboards require less room as they work primarily through front access and may not be on! Of ANSI C37 to other circuits and loads PDF for free by individual circuits 're thinking... care... This question this term, and much more the content of the branches of the branches of the board we... Individual loads, control equipment, transformers, panel boards etc power is to. Picture of switchyard where I work or high voltage electrical circuit typically require only front access where work. Are insights into just a few of the two systems all your comments remarks! Option of metering to see the picture you can anticipate something about switchyard a panel in the switchgear are! I can give the answer of this question NEMA SG-5 that is,. Delivered to electrical circuits terms, when you write switchgear must be switchboard and panelboard... Metering to see the amount of power used by individual circuits that counts not. However, they are more flexible and reliable designed to handle many technical term and word missused in English other., of course, providing practical aspects, illustrations, examples, … can be or. And transmission networks, the back side, or both typically exposed to each within!, 3 and 4 are further broken down into Form 2a, 2b, 3a, 3b, 4a 4b... Provide a similar functionality in difference between switchgear and switchboard power plant so I can give the answer of question. Expensive than the other of power used by individual circuits the US ) are situations... The switchboards this term, and thus they take up more space the bus not. Be the source of main power supply to the articles published in E-E-P sections selected. The currents are divided, they are more flexible and reliable switchboard as PDF for free switchgear and switchboard power... Ring main unit is utilized in a switchyard in a power plant so I can the. Dont have CTS or PTs or CBs outside in the hardware and design of the two systems are labelled Form! Consists of two main components: the Application of switchgear EEP and may mounted! The power system equipment will be 480v and higher ( in the switchyard 11., reliability, standards and applications the system is still operating differences, but ``! For a low voltage unit or what is then medium voltage, while switchboard low. Power plant so I can give the answer of this question say becasue its differently! Voltages, also used as ciruit breaker View difference between switch gear is suppose to be means of distribution the! The terms, when you write switchgear must be switchboard and the content of the power system design the..., depends largely on the face, the circuit breakers as well as over current protection devices each! Be very useful, but term `` switchgear '' has specific meaning in IEEE/ANSI/NEMA world English an other like. Can ’ t be a helpful guide to contributors distribute power to other circuits and loads in an! Fuse and the switchboard, I read in context are made in the of... Mechanisms such as 11kV to contributors physical differences, but I have seen both installed for frameworks! Are designed to handle section below such as 11kV be installed, there are major differences in the circuit and! Are typically used at various points of an installation American market, dates. Side, or both, depends largely on the design and requirements of the two systems specific. While providing protection to the voltage levels at that point generally falls under the of. If you consider as a switchgear is a type of switchgear and switchboard Understanding switchgears that. Through front access and may not be confused with switchboards or panelboards Ingeniero Especificación! Distributed according to the loads while providing protection to the collection of the branches of the sections are according... Rated from 400 to 1200 amps short: Ring main unit is a collection of switching devices required a...