A transmission substation connects two or more transmission lines. Where isolators are connected in staggered formation, provision of motor shall be at each pole. These have three stacks of post insulators as shown in the figure. The equipment required for a transformer substation depends upon the type of substation, service requirement and the degree of. Polymer station post characteristics 110kv to 350kv bil catalog number 2334603001 2326863001 2326853001 2331923001 2331873001 bil kv 110 150 200 250 350 technical reference equivalent 205 208 210 214 216 height inches mm 10 254 14 356 18 457 22 559 30 762 leakage distance in mm 17. Aug 19, 2010 substation, its function and types an electrical substation is an assemblage of electrical components including busbars, switchgear, power transformers, auxiliaries etc. There are two types of surge arrestors that are available. This bulletin is an update and revision of previous rea bulletin 651, design guide for rural substations revised june 1978. Jan 02, 2019 electrical isolators separate a part of the system from rest for safe maintenance works. An isolator is originally a knife switch and is design to often open a circuit under no load. Limited lifetime warranty substation eaton marina power and lighting, inc.
Presentation upptcl 400kv substation motiram adda, gorakhpur free download as powerpoint presentation. Dec 25, 2018 the electricity substation is a network of electrical equipment which is connected in a structured way in order to supply electricity to end consumers. The substation layout including the major equipment is as shown on drawing no. The different types of substations mainly include stepup type substation, stepdown transformer, distribution, underground distribution, switchyard, customer substation, and system station. Also the hard copies as per specification shall be submitted. Transformer power transformers are used in transmission network of higher voltages for stepup and step down application 400 kv, 200 kv, 110 kv, 66 kv, 33kv and are generally rated above 200mva. What type of isolators are used in electrical substations. Apr, 20 there are two types of surge arrestors that are available. There are different types of isolators available depending upon system requirement such as. Medium voltage switches, disconnectors and isolators the worlds most successful range of switches for indoor, outdoor overhead and outdoor underground applications up to 40. Substation types distribution substation located near to the endusers changes the transmission or subtransmission voltage to lower levels for endusers distribution voltages varies from 34,500y19,920 v to 4,160y2400 v blast and burn generally associated with fault current. Optimized design of substation grounding system using.
We hold an expertise in designing and fabricating a precisely engineered range of electrical substations, which includes ehv substation with isolators, ehv substation, small ehv substation with isolators, breaker substation and small substation. The electrical substation is the part of a power system in which the voltage. The electricity substation is a network of electrical equipment which is connected in a structured way in order to supply electricity to end consumers. Types of transformer different types of transformer. Frequently, after initial substation construction, requirements change, and plans for the ultimate capabilities of the substation are altered. Electrical isolator or electrical isolation switch. Electrical isolators separate a part of the system from rest for safe maintenance works. Substation automation system is commonly used to control, protect and monitor a substation.
All rus borrowers rus electric staff effective date. These isolators are provided for isolating the live parts for maintenance. Earth clearance this is the clearance between live parts and earthed structures, walls, screens and ground. Mar 17, 2017 even when the isolator opens on offload, still there is some accumulated static charge present in lines and due to which small flashover occurs while opening the isolator. Substation layout consists essentially in arranging a number of switchgear components in an ordered pattern governed by their function and rules of spatial separation. The various types of transformer shown in the figure above are explained in detail below. This type of transformer is categorized on the basis of a number of turns in the primary and secondary windings and the induced emf. Isolator west bengal state electricity transmission. Base isolation is a state of theart method in which the structure superstructure is separated from the base foundation or substructure by introducing a suspension system between the base and the main structure. The battery charging equipments comprises of a float charger and a boost charger. Check for substation foundation plan, as the centre line of foundation is shifted.
The classification of the substation by nature of functions is explained below in details. Supply in the package materials have been classified as under i. Pin type insulator can be one part, two parts or three parts type, depending upon application voltage in a 11 kv system we generally use one part type insulator where whole pin insulator is one piece of properly shaped porcelain or glass. The purpose of this file is to provide necessary information to datasim so that it can modify the template atp file to reflect the switching scenario to be simulated. Isolator west bengal state electricity transmission company. Different types of relays and their working elprocus.
Distribution substations michigan technological university. Mvlv substation transformer that represent the last step of bringing transformation to the low voltage and ensuring the protection and monitoring of the network. An analysis is made of the advantages of the iec 61850 standard for sequence control technology in the substation automation system sas. The various substation bus connections can be made by using any of four main methods bolting, clamping, compressing, and weldingdepending on the conductor type and material. Relay classification, principle of different types of electromagnetic relay.
Scribd is the worlds largest social reading and publishing site. Bus side isolator is a type of isolator that connects by the major bus. Medium voltage products technical guide the mvlv transformer. Depending on the function performed, it can be defined as a transforming, conversion, transmission or distribution substation. These substations are generally demanded in various electrical and engineering industries. To accommodate unforeseen future system modifications, consider the flexibility of the arrangement. Substations transform voltage from high to low, or the reverse, or perform any of several other important functions. This manual pertains to pantograph disconnectors of voltage rating 123kv.
Technology requirements on devices and equipments inside. Design study for 3311 kv substation, distribution and protection in. A substation is a highvoltage electric system facility. As a result, expansion of the substation facilities may deviate from the anticipated initial plan. Plps focus is to provide porcelain and polymer insulators for electrical transmission, distribution, sub station and all other applications. Mv switches, disconnectors and isolators apparatus abb. Switchgear and protective devices 310 modulei 10 hours protective devices. Basic elements of substation equipment 1 busbars conductors carrying power to individual branches 2 branches equipment for carrying power to grid lines instrument equipment in branches switch circuit breaker cb busbar disconnector outlet disconnector voltage and current transformers vt, ct. Distribution substations may also be the points of voltage regulation, although on long distribution circuits several kmmiles, voltage regulation equipment may also be installed along the line. Automatic simulation of ied measurements for substation. Manually operated, horizontally mounted on pole, vertical break. Base isolation is a stateoftheart method in which the structure superstructure is separated from the base foundation or substructure by introducing a suspension system between the base and the main structure. Main tasks associated with major substations in the transmission and ditribution system include following.
Gas insulated substation ppt pdf presentation gas insulated substations gis is a compact,multicomponent assembly enclosed in a ground metallic housing in which the primary insulating medium is compressed sulphur hexafluoride sf6 gas. Main tasks associated with major substations in the. Tikhodeev encyclopedia of life support systems eolss into substation equipment systems. Directions from hwy 71 take hwy 62 east to hwy 94 north toward pea ridge 1 miles. Electrical isolator which is commonly known as isolator or disconnector is a piece of equipment that is used in electric devices and power. Philosophy of protection, nature, causes and consequences of faults, zone of protection, requirements of a protective scheme, basic terminology components of protection scheme. In the fault situations the electric apparatus and systems become dangerous to humans. A substation is a part of an electrical generation, transmission, and distribution system. Optical isolator, a directional device in optical fiber communications.
Electrical substation ehv substation with isolators trader. Substation automation refers to using data from intelligent electronic devices ieds, control and automation capabilities within the substation, and control commands from remote users using scada to control powersystem switchyard devices. Owners supply materials osm 3311 kv power transformers, station 330. This voltage is stepped up by the help of a stepup transformer for transmitting the power. Substation, its function and types an electrical substation is an assemblage of electrical components including busbars, switchgear, power transformers, auxiliaries etc. Components and substations for electrical transmission and. It is used to switch generators, equipment, and circuits or lines in and out of a system. The simplest case is where all transmission lines have the same voltage. In such cases, substation contains highvoltage switches that allow lines to be connected or isolated for fault clearance or maintenance. Substation is integral part of a power system and form important links between the generating station, transmission systems, distribution systems and the load points.
Count the number of crates boxes and tally them against the shipping document. When a fault occurs in a substation, then isolator cuts out a portion of a substation. The substation design manual is not intended to replace asset management standards, but rather to act as a reference document that crossreferences existing standards and process documentation and plugs any gaps where asset management documentation does not exist. Barrier isolator, a device that provides a physical barrier between a laboratory technician and a work process. This type of substation gets the power supply from a near producing facility. The bidder shall submit quality assurance plan with the technical bid. Its main purpose is to isolate one portion of the circuit from the other and is not intended to b. Isolator microwave a twoport device that transmits microwave power in one direction only. Isolator is a manually operated mechanical switch which separates a part of the electrical power. Oct 22, 2016 what is substation types of substation classification on types of substation substation parts and equipment 3. One is the gapped arrester and the other one is the gapless zinc also referred to as oxide arresters. In transmission network, the typical design concept is the n1 reliability application. Electrical energy systems components and substations for electrical transmission and distribution systems b.
Electrical isolator or electrical isolation switch electrical4u. There is numerous electrical substation components like outgoing and incoming circuitry each of which having its circuit breakers, isolators, transformers, and busbar system etc for the smooth. Pin insulators are the earliest developed overhead insulator, but are still commonly used in power networks up to 33 kv system. So the definition of isolator can be rewritten as an isolator is a manually operated mechanical switch which separates a part of the electrical power. Bolted connections are utilized in connecting two or more flat surfaces together. There are different types of isolators used for different applications such as singlebreak isolator, doublebreak isolator, bus isolator, line isolator, etc. It also is used to change ac voltages from one level to another, andor change alternating current to direct current or direct current to alternating current. A mv lv transformer electrical substation consists, therefore, of the.
The applications of isolator include the following. Electrical substation components list diagram, working. Transfer bus side isolator stay connected by the major bus of a transformer. The bidder shall have to submit all the required type test reports for the offered item. Line side isolator stay connected by a feeder in line side. The isolator shall be motor operated, having individual motor for each pole. Autocad format and manuals in pdf format, for offered item shall be submitted. Absence of safe and effective grounding system can result in mal operation or non operation of control and protective devices thereby disturbing operation of. What is an electrical isolator types of isolators, working.
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