Type: Vacuum/Outdoor. ETS-50-06-06-C1 High-voltage components - Disconnector-Earthing switch 400 kV ETS-50-06-08-C1 High-voltage components - Current transformer 400 kV 2000-1000 A ETS-50-06-08-C2 High-voltage components - Current transformer 400 kV 3000-1500 A(3) ETS-50-06-10-C1 High-voltage components - Capacitor voltage transformer 400 kV. A transformer is a device that transforms AC voltage from high to low, that would be step down transformer, or from low to high, that will be step up transformer. Reduce Maintenance Costs & Reliability with Transformer On-line Condition Monitoring. relay a current which is a constant faction of the current in the line. Solar power generation is a renewable method of proving electrical power to a grid or load. Often, switches are used on the high side of the transformer, and protection devices are used on the low side, but substations supplying large amounts of load may have protection devices on both sides of the transformer. Circuit breakers, reclosers, and fuses are protection devices. North American Substation Services (NASS) is a nationally-recognized expert specializing in transformer and substation apparatus installation, services, and repair. 220 Kv Substation Report Pdf. The designs take into account the harshest environmental conditions of temperature, vibrations and electromagnetic compatibility. Current Sense Transformers Sensed current up to 40 Amps. The inputs to the encoder will be the English sentence, and the 'Outputs. We are happy to now offer even more services to current customers of Ross Maintenance and Service, LLC. ) B-9, MIDC Industrial Area, Chikalthana, Aurangabad-431006, Maharashtra State, India Call us now: +91-9822611379 Email: [email protected] Typical output levels of instrument transformers are 1-5 amperes and 115-120 volts for CTs and VTs, respectively. Excitation Current & Residual Magnetism A transformer core with residual magnetism can cause erroneous readings in excitation current measurements. These devices are particularly suitable for MV/LV substations. Rs 10 Lakh / Peace. Get an introduction to technical requirements, configuration philosophies, design practices, information sources and work processes. The polarity of a current transformer is determined by the direction in which the coils are wound around the core of the CT (clockwise or counter clockwise), and by which way the secondary leads are brought out of the transformer case. Same transformer as in Figure 2, energized through a 75 μF capacitor. • Transformer. In essence, electrical substations consist of power transformers, circuit breakers, and secondary systems for protection, load control and metering. For hospitals, the substation feeding the distribution system is typically liquid-filled MV primary to 480/277 V secondary transformers connected to service. Niagara Transformer currently has about 100 employees. Mineral Oil, Enviro Temp FR3, Luminol, or other liquids. Although the transformer maximum air temperature will be 40°C per above Clause 4. The most common data in the nameplate are listed below: a. Excitation Current Test determines the current necessary to maintain trans-. Figure C-3 shows a schematic diagram for two positions of a breaker-and-a-half bus. Access to the latest technology, global sourcing and up-to-date processes ensures long life and meets the most stringent needs defined by the industry. 1 Current transformers according to IEC 61869-2, class P, PR 127 9. Moving from conventional to intelligent substations. maintenance of Primary and Secondary Unit Substation Transformers. AMP Transformers has done extensive work in providing high quality products and services at competitive rates to the Industry. A current transformer is a device which is used for the transformation of current at a higher value to a lower value with respect to the earth potential. Power transformers are usually oil filled. A wide variety of transformer substation options are available to you, such as three, single. Typical voltages for long distance transmission are in the range of 155,000 to 765,000 volts. This technique is known to be more practical than other available approaches. Substation style. Categories Circuit Breaker, Electrical Machines, Generation, Instrumentation, Measurement, Power System, Substation, Switchgear, Transformer. Apply to Substation Technician, Lineman, Line Technician and more!. Twitter; Facebook; 9. Equipped with circuit breakers, substations act as the distribution system’s body guard – protecting against voltage fluctuations, increased load, and monitoring the flow of current. Common troubles in transformers are an open in the winding, a short between the primary and the secondary, and a short between turns. Medium Voltage switches: Rated insulation voltage: 24 KV, rated frequency: 50/60 Hz, and rated main busbar current: 630 A. Our transformers have up to a 30 MVA base and voltage ratings up to 138 kV. Transformer #2. An Electrical Substation plays an important part of the electrical system as it acts a bridge in transferring the electricity from the power generation source unit to the end consumers by working to speed up or slow down the current when required. Companies that own and operate transformer substations must comply with all current laws and regulations. A current transformer is a device which is used for the transformation of current at a higher value to a lower value with respect to the earth potential. It typically also comprises switchgear and other components. Substation, Power, Distribution manufacturer / supplier in China, offering 66kv Open Type AIS Substation, Two-Semi-Trailer Mobile Substations (230/ 66/20) Kv with One 66 Kv Gis Incoming and One 20 Kv Gis Incoming Metal Enclosure Without Truck. REC is a nodal agency for this scheme. The current transformer section is located in the pressure-resistant head housing. Current transformer 110 kV high voltage substation. Image credit: Western Area Power - Test track substation. The very high 0. It is used to step-down the input voltage from a power line to a voltage level that can be processed by metering devices and protection relays in a substation. A current transformer works on the same principle as that of a simple transformer however it steps down the high current into a low level so that it can be Prefabricated power distribution substation Its basically a whole 11kv substation but in one unit. The conductor carrying current and having multiple numbers of incoming and outgoing line connections can be called as bus bar, which is commonly used in substations. Alfen built its very first transformer substation over 50 years ago, and we have been working hard to equip them with the latest technological developments and innovative solutions ever since. Current transformer is also called as Series Transformer because it is connected in series connection with any circuit for the. Where separate current transformer accommodation has to be provided, the cost of separately mounted current transformers and also the extra substation space required almost always results in them being located only on one side of the circuit breaker. Transformer Specifications. In the automation, we consider the voltage, current and temperature as the parameters to be monitored as the transformer shows its peak sensitivity for the same. CT used for the measurement of AC current by taking the samples of higher currents of the system. Technically, digital substation refers to a substation that employs both IEC 61850 Process Bus and Station Bus in its protection and control architecture. This project is proposed to acquire the parameters like voltage, current, temperature, moisture content, vibrations, etc. Substation Transformers. 100 current transformer using an ITI model #115, #306, #386, #388 or #680. Therefore, we are proposing the automation of the distribution transformer from the EB substation. Basic introduction to electricity from Fundamentals, Generation, Delivery, Use, and Safety. t v c s m m m c c t c t. Figure 4 - Current transformer in MV switchgear. inrush point is established at eight (8) times transformer full load current for a period of 0. Current transformers are designed to provide a scaled down replica of the current in the HV line and isolate the measuring instruments, meters, relays, etc. A current transformer is a gadget utilized for the transformation of higher value currents into lower values. Current Transformer wiring laying in Substation and control relay panel in control wiring system use and this video knowledge porpoise upload My more. These are classified into different types like single bus, double bus and ring bus. Electrical Substation Current Transformer Electric Utility Lineman Electrical Engineering House Design Science Engineers Hyderabad. Inductive Current Transformer JGF. Since Current Transformer is fundamentally a transformer, it translates the current from the Primary to the Secondary side, inversely proportional to the turns so as to maintain the relationship, IP = n IS where, n is the turns ratio of turns between the secondary and primary winding. 5-kV side of the distribution substation transformers has a maximum continuous current of 2000A/phase during both normal and emergency conditions. The polarity of a current transformer is determined by the direction in which the coils are wound around the core of the CT (clockwise or counter clockwise), and by which way the secondary leads are brought out of the transformer case. Trench optical current transformers are based on Faraday effect principle. Over the years, our capabilities have expanded exclusively into the redesign and remanufacture of substation class power transformers. General Electric, an American company with a revenue of $120 billion, offers power, current and capacitive, high voltage, distribution, network, instrument, substation, auxiliary, and industrial transformers. Current transformers are devices used for the conversion of electrical parameters. All substation transformers are furnished with a mechanical pressure relief valve (PRV) or pressure relief device (PRD). This amounts to an estimated 2019-2030 cumulative forecast of USD 1,911 million. with a Transformer Bank. Ceramic Insulators. This paper describes differential protection for power transformer, especially the rating of purposed system is 100 MVA, 230 kV/33 kV at substation. buchholz relay. Depending on the type of rail system this power would be either direct current (dc) or alternating current (ac). admin Jan 26, 2020 0. net/video/li9w-xBVG0g/video. Intermediate transformers are utilized at various electricity supply facilities. According to Sabah Mashaly, the EETC Chairperson, the scope of the work as per the contract is the construction of the substations that featuring gas-insulated transformer equipment type. They can be used in outdoor or indoor (when filled with R-Temp or. Primary Substation Potential Transformers 11kv through 69kv. 3 Efficiency requirements and classes for transformers 49 7. A current transformer is a gadget utilized for the transformation of higher value currents into lower values. c) Current transformer d) Transformer. selection-of-current-transformers-wire-sizing-in-substations 1/2 Downloaded from www. For example, capacitor switching, transformer tap action, motor starting, start-up and If, in the Network Service Provider's opinion, the problem is caused by an unbalance in the phase currents within a User's equipment or facilities, it for terminal substations in the Perth metropolitan area, 3. A substation has an assembly of electrical components. SELECTION OF CURRENT TRANSFORMERS & WIRE SIZING IN SUBSTATIONS Sethuraman Ganesan ABB Inc. A substation includes transformers, control equipment for switching and system protection to transfer power to distribution lines. With forecasted market growth, multiple opportunities exist to localize the substation transformer production value chain. There are nine main steps to build a substation to lower the voltage generated by transmission lines, and it takes many tradespeople to meet the challenge. c current for transmission of bulk power over Converter substations are placed at both the sending and the receiving end of the transmission lines It does not have transformers for changing the voltage levels. It produces a current in its secondary which is proportional to the current in its primary. Once smaller transformers take that voltage down to usually 7,200, the power leaves this substation. 1 Current transformers according to IEC 61869-2, class P, PR 127 9. Did your transformer fail at this fault current? Knowing the answer to this question will maybe lead you to update your fault current studies for the substation. The ratios available are used to transform these. The measuring instruments are designed for low value of voltages. A transformer is magnetically excited by an alternating current & voltage so that it becomes extended and contracted twice during a full cycle of magnetization. Transformers at substations , can be classified in different (possibly disjoint) groups, with respect to their voltage levels (power levels), function in a power grid, insulation class, or construction, etc. You can transform the voltage or current down with a transformer whose turns ratio is accurately known, then measuring the stepped down magnitude with a normal range instrument. Along with the role of each type of equipment, one should understand. Substations and transformers can be distinguished as follows: power = substation represents an area that may contain transformers. Packaged substations are tailored to individual customer requirements using products from the comprehensive. In this way, overloads of opera-. Depending on the size and purpose of the substation, the area affected could vary from less than one acre to up to 10 acres. transformer core. Companies that own and operate transformer substations must comply with all current laws and regulations. Apple Substations. We opened the top hatch and found that the oil level was just below the radiators. 9 and 69 kV and secondary voltages between 2. Allentown, PA ABSTRACT More and more sub-stations are retrofitted with numerical relays, meters and monitoring devices. Power Rush-Repair Command. Instrument transformers, such as voltage and current transformers used for relaying and revenue meter-ing, can bring the high-level voltages and currents from the power appara-The key cost savings in substation updates is in the substation wiring, including converting copper wires into multiplexed optical cables. The V p is the voltage applied to the primary terminal of the potential transformer. New Ameren Mo. current or former employee. Current transformers type JGF are used in high voltage switchgear within the 245-550 kV range. Distribution Transformers Up To 36kv 400/230 Volts. This paper describes differential protection for power transformer, especially the rating of purposed system is 100 MVA, 230 kV/33 kV at substation. Manufacturing of various Transformers We got many years of successful manufacture experience and research and developments, we have acquired the technology to manufacture Power and Distribution Transformer up to ratings as under:. Through the analysis of transformer load, the capacity and number of main transformers are selected, and the main connection modes of 110kV, 35kV and 10kV are determined. Current transformer — A CT for operation on a 110 kV grid In electrical engineering, a current transformer (CT) is used for measurement of electric Spot network substation — In electricity distribution networks, spot network substations are used in interconnected distribution networks. Turning Arrangement Of Conductors. Solar power generation is a renewable method of proving electrical power to a grid or load. This substation uses large transformers to convert the generator's voltage (which is at the thousands of volts level) up to extremely high voltages for long-distance transmission on the transmission grid. However, the neutral line current flowing through the substation transformer is increased to 132 A when the TSS of the LRT adopts a single-phase transformer to supply the tram. Substation Transformers up to 69 kV. Category Zone substation. Electric power may flow through several substations between generating plant and consumer, and may be changed in voltage in several steps. This topic is the result of our readers’ choice and I think this is a good opportunity for all of us dealing with specific products, to look at the big picture and the conditions in which these products are made – substations. Up to 5 cores can be included in the current transformer. The Substation Transformer is shipped filled with insulating liquid and as completely assembled as possible. Presenter – Eduardo Ramirez-Bettoni, P. 6 CT's For Bus-Bar protection. For dc systems, the traction substation core equipment will be the transformers and rectifiers to used to convert the utility supply to dc. On load condition, a part of the load current is obtained directly from the supply and the remaining part is obtained by transformer action. Current transformers type JGF are used in high voltage switchgear within the 245-550 kV range. reliability. POWER TRANSFORMERS. 5 – 20 – 34. t in Hindi Current Transformer in Hindi vnclip. Substation Transformers. In the automation, we consider the voltage, current and temperature as the parameters to be monitored as the transformer shows its peak sensitivity for the same. With advances in digital technology, communications and standards, this is now changing to what is known as the digital substation. Circuit breakers are automatic switches that interrupt electrical flow to de-energise equipment and clear faults. A current transformer (CT) is a type of transformer that is used to reduce or multiply an alternating current (AC). CTs interface the electronic device and the MV primary system. Common troubles in transformers are an open in the winding, a short between the primary and the secondary, and a short between turns. To solve this problem, substations have been placed in buildings that are in harmony with those around it, and have therefore become “invisible. The concept includes compact medium-voltage switchgear with communication capabil-ity, regulated distribution transformers, as well as integrated telecontrol and automation solutions which monitor and control the medium- and low-voltage grid. F and other characteristics. Transformer Substation: The majority of the sub-stations in the power system are concerned with the changing of voltage level of electric supply. This amounts to an estimated 2019-2030 cumulative forecast of USD 1,911 million. 06-09-01 transformer with two windings 06-10-05 variable voltage transformer 06-09-06 auto-transformer 06-09-08 choke / reactor 06-09-01b voltage transformer 06-09-10 current transformer 06-13-04 current transformer with two secondary windings on the core ns-41 core balance current transformer 06-02-02 open vee winding, v (60). Along with the role of each type of equipment, one should understand. Circuit breakers are automatic switches that interrupt electrical flow to de-energise equipment and clear faults. Any malfunction of a current transformer can generate huge damage in the system. Types of Transformers. SELECTION OF CURRENT TRANSFORMERS & WIRE SIZING IN SUBSTATIONS Sethuraman Ganesan ABB Inc. Most of the protecting relays take signals from current transformers for actuating. Jordan Transformer was founded in 1973 as a repair shop primarily for the rewind of distribution transformers and as a provider of transformer field services. Welcome SAFETY. A substation includes transformers, control equipment for switching and system protection to transfer power to distribution lines. Contact Electric Transformer & Substation Discussions on Messenger. 4 kV electrical energy and for its supply to consumers in temperate climate districts (-40°C to +40°C). The current transformer section is located in the pressure-resistant head housing. In instrument transformer, the primary current is the vector sum of the excitation current I o and the current equal to the reversal secondary current I s multiplied by the ratio of 1/k t. 4 kV to 69 kV in 225 through 20,000 kVA sizes, but 600 volt through 35 kV secondary voltage ratings are also available. CT used for the measurement of AC current by taking the samples of higher currents of the system. Jordan Transformer was founded in 1973 as a repair shop primarily for the rewind of distribution transformers and as a provider of transformer field services. In MV systems, current transformers (CTs) connect protective or metering devices. This page uses frames, but your browser doesn't support them. Note: Data entry fields for which you are required to supply information have a non-white background color. In traditional substations the connections between devices are hard-wired, which transmits information in the form of analog signals over copper wiring. This must be achieved by carefully select- ing suitable air inlets and outlets positions in a. T&R Electric can also repair your existing substation transformers. This substation uses large transformers to convert the generator's voltage (which is at the thousands of volts level) up to extremely high voltages for long-distance transmission on the transmission grid. It is used to switch generators, equipment, and circuits or lines in and out of a system. 3 with a preferred temperature range for items in this technical specification of -5degC to +50degC for very hot climates. These are classified into different types like single bus, double bus and ring bus. Simulation of 300 MVA Transformer Energization in new Substation 400/110 kV ''Ernestinovo'' using ATP-EMTP Predrag Maric 1, Srete Nikolovski 1, Zoran Baus 2 1Faculty of Electrical Engineering. specializes in the sale and service of low and medium voltage circuit breakers and other electrical power distribution equipment. Stein Industries Inc. TR01-10E Power transformers 2 MVA and above TR01-11E Shunt reactors 145kV and above TR01-12 Surge arresters 12-420 kV TR01-13 Substations – grounding TR01-14 Substations, bolted connectors for current carrying conduc-tors in outdoor switchgear TR01-16 Labels on 7. Some indoor substations (e. This transformer steps down the current from 800 amps to1amp. Hace un año. ) consists of a 10/13 MVA and 5/7 MVA 66/22kV transformer in banked configuration supplying a single 22 kV bus with three distribution feeders controlled by ACR’s. Intelligent instrument transformer for control systems of digital substations. Converter duty transformers are used as set up transformer from generator to line voltage. The purpose of substations is to transform the voltage from long-distance high voltage powerlines to the voltages used to supply our homes. It also is used to change AC voltages from one level to another, and/or change alternating current to direct current or direct current to alternating current. Instrument transformers, such as voltage and current transformers used for relaying and revenue meter-ing, can bring the high-level voltages and currents from the power appara-The key cost savings in substation updates is in the substation wiring, including converting copper wires into multiplexed optical cables. Steel Manufacturing Plant Medium Voltage Substation Two transformers were shipped as part of this project aimed at upgrading a major steel plant in Ohio. Typical transmission voltage ranges are 46,000 to 161,000 volts, with typical distribution voltages being between 2,400 to 35,000 volts. current transformer #current transformer in hindi #ct current transformer and why we use in hindi Lightning arrester in Hindi Link part 2: TSS part 2,Standard Schematic Single Line Diagram of Railway Traction Substation vs New on field TSS. t v c s m m m c c t c t. buchholz relay. Fire at a UI substation in the Wooster Square area. T&R Electric offers single and three phase substation transformers. Get competitive pricing on OEM parts and kits as well as hard-to-find items for transformers, LTC equipment and other utility assets from Delta Star. The measuring instruments are designed for low value of currents. 5kV Power Transformer with associated 69kV high voltage circuit breaker, disconnect switches, instrument transformers and revenue metering. Substation evolution Transformers and substations power transformers, unpleasant. 5 MVA traction transformer and inter substation distance of 50-60 Km. Current Transformer wiring laying in Substation and control relay panel in control wiring system use and this video knowledge I already make a full detailed video on c. High voltage direct current (HVDC) power systems used d. Maybe you need to update your % Z of your transformer specifications for the substation to mitigate the problem or add series reactor to limit the fault current. Current transformer testing. Otherwise, authorities could subject them to hefty fines or even worse measures. But in nearly all cases, the highest field is usually produced by the lines and cables supplying the substation and. Description Downloads Product Enquiry The Omicron CPC 100 is a powerful device which can perform testing on numerous substation components via an uncomplicated user friendly interface. With the government’s emphasis on environmental issues of power transmission and transformation project, noise pollution has become a prominent problem now. At each step, we adopt strict safety, project quality and environmental protection practices. Instrument transformers including current transformers, inductive voltage transformers, capacitive voltage transformers, combined transformers, gas insulated instrument transformers, voltage transformers for GIS substations, optical current transformers. Figure 2 Unloaded transformer, rated 120-V excitation. Being a customer focused organization, we are engaged in offering a wide gamut of Dry Type Electrical Transformers. It is your completely own period to perform reviewing habit. outdoor/indoor single phase free-standing, bushing type and ring type Current Transformers 11kV through 69kV, intended to be used in the Primary Distribution Substations of Saudi Electricity Company, Saudi Arabia. current in the line. Added roughly 80 gallons of oil and made sure that now the oil level was above radiators. Transformer substations are usually constructed in plants and delivered to installation sites in completely assembled form or as individual units. Where separate current transformer accommodation has to be provided, the cost of separately mounted current transformers and also the extra substation space required almost always results in them being located only on one side of the circuit breaker. generator, isolated phase bus duct, step-up transformer, station auxiliary transformer, non-segregated phase bus duct, station startup transformer, medium voltage switchgear, secondary unit substations, and motor control centers. thousands of volts) to either 67V or 115V (at 34. High Voltage. T is having thick bar primary connected in series, between transformer secondary and bus bar, can easily be judged, while P. Literally a 132 kVA substation would have a 132 kVA transformer. Get Free Selection Of Current Transformers Wire Sizing In Substations Selection Of Current Transformers Wire Sizing In Substations|stsongstdlight font size 11 format When somebody should go to the ebook stores, search commencement by shop, shelf by shelf, it is in reality problematic. INTRODUCTION Substation commissioning and testing is a critical task prior to substation energization to ensure all equipment will function safely in the intended manner. A current transformer is a gadget utilized for the transformation of higher value currents into lower values. NEXT International Electrotechnical Group is manufacturing transforming substations in concrete vessel, e. Depending on the type of rail system this power would be either direct current (dc) or alternating current (ac). We use it for managing and distributing power in the electrical network. A transformer is magnetically excited by an alternating current & voltage so that it becomes extended and contracted twice during a full cycle of magnetization. Chinese Transformer Export to Peru 50000kVA 60kv Power Transformer, Find details about China Power Transformer, Substation Transformer from Chinese Transformer Export to Peru 50000kVA 60kv Power Transformer - Shenda International Engineering Co. This is done because we have no instrument for measuring of such a large current. Current Transformer wiring laying in Substation and control relay panel in control wiring system use and this video knowledge I already make a full detailed video on c. An Electrical Substation plays an important part of the electrical system as it acts a bridge in transferring the electricity from the power generation source unit to the end consumers by working to speed up or slow down the current when required. The Current Transformer (CT) Selection Guide provides assistance in selecting the appropriate CT for each protection relay. Substation Transformers up to 69 kV. See full list on electricaltechnology. inrush point is established at eight (8) times transformer full load current for a period of 0. The very high 0. Page TransparencySee More. China Transformer Substation - Select 2021 Transformer Substation products from verified China Transformer Substation manufacturers, suppliers on Made-in-China. Power Plant. Instrument transformers are high accuracy class electrical devices used to isolate or transform voltage or current levels. Rated current: 1250A. Where separate current transformer accommodation has to be provided, the cost of separately mounted current transformers and also the extra substation space required almost always results in them being located only on one side of the circuit breaker. The measuring instruments are designed for low value of currents. While supporting substations with increasingly higher voltage and capacity, Kitashiba’s intermediate transformers satisfy various customer needs, including a small installation footprint, low power loss, low noise, and ease of maintenance. Figure 2 Unloaded transformer, rated 120-V excitation. Substations generally have: 1. Additional Instruction s Copies of instruction leaflets or books referred to. Our management and highly skilled field-based force have received specialized training and are among the most experienced in the industry. These transformers usually range from 1. The measurement will be within range of the given accuracy up to 720A. A substation is designed to receive energy from a power system, convert it and distribute it to the feeders. The operation of current transformer is similar to the conventional power transformer. Oct 11, 2014 - Medium Voltage Switchgear, Low Voltage Switchgear, Ring Main Unit(RMU), Outdoor Substation. This power format, often called bulk power, is great for the movement of the current, but not much else. The ratios available are used to transform these. Product Description AM4 Series Protection Relay for Medium Voltage Apllication General AM series microcomputer protection measurement and control device set protection, measurement, control in one, suitable for 35kV and below the voltage level of the user terminal substation (station), can achieve the protection and measurement and control of the user substation. CTs used for metering applications will typically have a thermal rating factor (TRF). The inputs to the encoder will be the English sentence, and the 'Outputs. If wet air enters the transformer, it may be cooled by the tank wall below its dew point and condensed, so it will reduce dielectric strength of the transformer Dry air should be supplied through hand hole during working or inspection. Voltage transformer (VT) which is used in this substation has a 100VA capacity and magnetization characteristic of it was modeled by single-value two-term polynomial with q=7. The current transformer turns ratio test can be performed through current or voltage injection, being always preferable the current method, but the Raptor The Raptor is a multifunctional substation test system, including transformer tests for the ratio, burden, polarity, knee point and withstand voltage. Earthing transformer (Fault current 4000Amp for 10 seconds) A grounding transformer or Earthing transformer is a type of auxiliary transformer used in three-phase electric power systems to provide a ground path to either an ungrounded wye or a delta-connected system. SELECTION OF CURRENT TRANSFORMERS & WIRE SIZING IN SUBSTATIONS Sethuraman Ganesan ABB Inc. This specification covers the electrical and mechanical characteristics of Eaton’s Cooper Power series 300–12,000 kVA three-phase substation distribution transformers. inrush point is established at eight (8) times transformer full load current for a period of 0. Gas Insulated Switchgear for extra-high voltage (up to 300kV) Cubicle type GIS for high voltage (up to 77kV) Main substation transformer for receiving power; Switchgear for main/plant power distribution (up to 33kV) Transformer for medium/low voltage distribution. Transformer Specifications. Undertaking the delivery of a 6. There will also be the connectivity of electricity to the 220KV Badr – Madinaty and New Cairo – Madinaty, as well as 66kV Shorouk – Madinaty and Badr. Dry, Molded and Oil-filled Instrument Transformers for new applications and replacement of aging. Packaged substations are tailored to individual customer requirements using products from the comprehensive. Traditionally substations have used circuit breakers, current transformers (CT), voltage transformers (VT) and protection relays all wired together using copper cables. We can build any configuration for your distribution system. However, it provides real-time access for controlling and monitoring the substation. will have a current of 2·5 A. Power lines in substations operate at high voltages and carry current of thousands of amperes. Their low flammability feature makes them an ideal solution for hospitals, shopping centers, and high-occupancy buildings. The delta-wye transformer could be located at a utility-owned distribution substation, or the delta-wye transformer could be located at a customer-owned substation. [] electrical and electronic equipment for power station and substation, included all range protection relays, HV current and voltage transformers, all range electronic transducers, various automatic []. For dc systems, the traction substation core equipment will be the transformers and rectifiers to used to convert the utility supply to dc. transformer core. ) B-9, MIDC Industrial Area, Chikalthana, Aurangabad-431006, Maharashtra State, India Call us now: +91-9822611379 Email: [email protected] High voltage of circuit taps. These transformers are manufactured using quality approved raw material which we procure from reliable vendors of the market. In this way, overloads of opera-. A typical substation at a power plant. It then is stepped down again and again. Between the generating station and consumer, electric power may flow through several substations at different voltage levels. Below is a. In traditional substations the connections between devices are hard-wired, which transmits information in the form of analog signals over copper wiring. Protection equipment 3. They are located at the receiving stations and distribution substations. Siemens has received an order from the state-run energy provider, Bangladesh Rural Electrification Board (BREB), to supply 46 transformer substations for Bangladesh. 2-420 kV switchgear TR01-17 Shunt capacitors. maintenance of Primary and Secondary Unit Substation Transformers. Current transformers type JGF are used in high voltage switchgear within the 245-550 kV range. keeps investment and operation costs low. Because In electrical substation isolator is used to disconnect a power transformer when it is in no-load condition or a small amount of load is present. Distribution transformers in the street reduce the voltage further to supply customers at their premises. ) consists of a 10/13 MVA and 5/7 MVA 66/22kV transformer in banked configuration supplying a single 22 kV bus with three distribution feeders controlled by ACR’s. A substation that has a step-up transformer increases the voltage while decreasing the current, while a step-down transformer decreases the voltage while increasing the current for domestic and commercial distribution. You can also choose from power, current. These high-precision sensors, ranging from 100 to 2,000 amperes, allow both current measurement and energy metering. Substations transform voltage from high to low, or the reverse, or perform any of several other important functions. Peak current is now 34 A, peak voltage is 240 V (1. The RESA Power Transformer Re-manufacturing Service offers a new lease on life for this used 2,000 KVA MGM Liquid Substation Transformer, enabling it to be completely rebuilt and returned to good-as-new condition, or even upgraded to a higher specification. Gas insulated switchgear is commonly used in substations and the development of gas insulated transformers allows complete integration of substation equipment with resultant space and cost savings. Once smaller transformers take that voltage down to usually 7,200, the power leaves this substation. Current transformers and inductive voltage transformers are available from 5kV to 69kV. We can build any configuration for your distribution system. The transformer substations make it possible to increase the voltage from low to medium, or vice versa, depending on the needs of the client in each project. (AIS) and distribution transformer. Lot 188: No. The measurement will be within range of the given accuracy up to 720A. 7 Circuit Breaker. General Electric, an American company with a revenue of $120 billion, offers power, current and capacitive, high voltage, distribution, network, instrument, substation, auxiliary, and industrial transformers. Today non-conventional current and voltage transformers have achieved high performance. The Earth Fault Current Transformer is a sensitive current transformer used to detect ground-fault current. Listen as Terrence Smith, helps put IEC 61850 into perspective by discussing the what it is, the data model, the publisher/subscriber protocol, and process bus & station bus applications. Common troubles in transformers are an open in the winding, a short between the primary and the secondary, and a short between turns. Current transformer is an electrical device which is used for the measurement of electric current and power of transmission and distribution lines. Distribution transformers in the street reduce the voltage further to supply customers at their premises. TR01-10E Power transformers 2 MVA and above TR01-11E Shunt reactors 145kV and above TR01-12 Surge arresters 12-420 kV TR01-13 Substations – grounding TR01-14 Substations, bolted connectors for current carrying conduc-tors in outdoor switchgear TR01-16 Labels on 7. A Current Transformer or CT is very essential equipment installed in an electrical substation for electrical measurement and protection A schedule of such maintenance of current transformer is preferred below for ready reference. Suppose a current transformer rated at 100/5 A is connected in the line to measure current. A transformer designed to increase the voltage from primary to secondary is called a step-up transformer. unit substation. A transformer is a device that transforms AC voltage from high to low, that would be step down transformer, or from low to high, that will be step up transformer. It is connected in series with electric energy measurement, measuring, relay protection and transient protection. A current transformer is a gadget utilized for the transformation of higher value currents into lower values. This specification covers the electrical and mechanical characteristics of Eaton’s Cooper Power series 300–12,000 kVA three-phase substation distribution transformers. along with guides you could enjoy now is selection of current transformers wire sizing in substations below. The substation feeding the system has a wye with grounded secondary transformer, and even in the event your xformer is single-phase, that phase is more than likely part of a three phase system. Primary Substation Potential Transformers 11kv through 69kv. Companies that own and operate transformer substations must comply with all current laws and regulations. A transformer is used to transfer energy. Therefore, it is good practice to ensure that a current transformer is in good c. A fault leading to an open secondary could cause the primary current to overwhelm the insulation, causing the winding to short circuit. The primary neutral voltage at the end of the distribution line can be 20 volts or more depending on the combined load on the. Could The Transformer be another nail in the coffin for RNNs? Doing away with the clunky for loops, it finds a way to allow whole sentences to simultaneously enter The diagram above shows the overview of the Transformer model. Power lines in substations operate at high voltages and carry current of thousands of amperes. A mobile substation is a substation on wheels, containing a transformer, breakers and buswork mounted on a self-contained semi-trailer, meant to be pulled by a truck. E - H D , G / 4 Line Isolator. The presence of third (and other zero-sequence) harmonics at an ungrounded neutral can cause overvoltage conditions at light load. High voltage direct current (HVDC) power systems used d. Electrical Isolator Isolator does not have any system to avoided arching during disconnection. At each step, we adopt strict safety, project quality and environmental protection practices. The three-phase power leaves the generator and enters a transmission substation at the power plant. Our management and highly skilled field-based force have received specialized training and are among the most experienced in the industry. The Wimo monitoring system for distribution transformers (a), the Wimo controller (TMU) with a GSM module in a transformer substation; schematic diagram (b), and layout (c). keeps investment and operation costs low. The resistor used was determined by using the of the burden current transformer. They are constructed to interconnect easily with both primary and secondary switchgear. In this way, overloads of opera-. This paper describes differential protection for power transformer, especially the rating of purposed system is 100 MVA, 230 kV/33 kV at substation. The capacitor voltage transformer (CVT) is used for line voltmeters, synchroscopes, protective relays, tariff meter, etc. t in Hindi Current Transformer in Hindi vnclip. Transformer Specifications. Transformer Substation. It then is stepped down again and again. These stations convert the bulk power to premium power and send it out to homes and businesses. ) B-9, MIDC Industrial Area, Chikalthana, Aurangabad-431006, Maharashtra State, India Call us now: +91-9822611379 Email: [email protected] The nameplate of current transformers contains basic information about the transformer. along with guides you could enjoy now is selection of current transformers wire sizing in substations below. Current transformer is an instrument transformer used in substation for measurement and protection purposes. The voltage between phase to phase is 400 V, and the voltage between phase to neutral is 230 V. These losses consist primarily of I2R losses in the primary and secondary winding and ensure that specifications of the trans-former design are met. admin Jan 26, 2020 0. Power Rush-Repair Command. An Electrical Substation plays an important part of the electrical system as it acts a bridge in transferring the electricity from the power generation source unit to the end consumers by working to speed up or slow down the current when required. Current Transformers (CT) Current Transformers (CT) by EatonVideos 9 months ago 14 minutes, 31 seconds 56,124 views Current Transformer Installation. Outdoor Current Transformers are manufactured by using high quality Copper, Brass, Aluminium, lamination Strips, MS Section, Transformer Oil and Insulators. power = transformer represents a transformer device, as a. Electricity transformer high voltage into a powerhouse of produc. Integral to the enablement of digital substations, non-conventional instrument transformers or sensors have evolved in quality and performance to such a level that digital current and voltage measurement continues to grow replacing traditional substation construction globally. If wet air enters the transformer, it may be cooled by the tank wall below its dew point and condensed, so it will reduce dielectric strength of the transformer Dry air should be supplied through hand hole during working or inspection. Transformer. CT used for the measurement of AC current by taking the samples of higher currents of the system. These components include power transformers, busbars, switchgear. TECHNICAL SPECIFICATION FOR CURRENT TRANSFORMER 1. Most of the distribution substations were located near to consumer ends. 5 kV MVAR Losses 63 GSU Transformers 34. A part of the winding is common to both primary and secondary sides. Each substation consists of an MV compartment, transformer compartment, and LV compartment. Power transformers are widely recognized to be the most critical asset in the substation. April 2021: We'll begin replacing this transformer and expect that it will take about three months to complete; December 2021: Once the new transformer is in service, we'll remove 5 external voltage regulators from service. Outdoor Current Transformers are used in Electrical Substation at all major HT Connected Load. For the distribution substation given in Problem 14. In this paper, proper application of CLR to HV substations is proposed, based on a comprehensive short circuit analysis of 4 well-known substation bus bar arrange- ments. Earthing transformer (Fault current 4000Amp for 10 seconds) A grounding transformer or Earthing transformer is a type of auxiliary transformer used in three-phase electric power systems to provide a ground path to either an ungrounded wye or a delta-connected system. Circuit breakers, reclosers, and fuses are protection devices. (ii) Voltage transformer. Station class: Higher burden, higher thermal rating, and extra creep distance for metering and/or relaying applications in substations or installations where SUPERBUTE Product Overview: Current Transformers. Current Transformers (CTs) and Potential Transformers (PTs):. Up to 5 cores can be included in the current transformer. Source from Guangdong Sihui Instrument Transformer Works Co. Otherwise, authorities could subject them to hefty fines or even worse measures. The substation feeding the system has a wye with grounded secondary transformer, and even in the event your xformer is single-phase, that phase is more than likely part of a three phase system. current in the line. Guidaojiaotong Polytechnic Institute, Shenyang 110023, China. Dry, Molded and Oil-filled Instrument Transformers for new applications and replacement of aging. , from the high voltage power circuit. ETS-50-06-06-C1 High-voltage components - Disconnector-Earthing switch 400 kV ETS-50-06-08-C1 High-voltage components - Current transformer 400 kV 2000-1000 A ETS-50-06-08-C2 High-voltage components - Current transformer 400 kV 3000-1500 A(3) ETS-50-06-10-C1 High-voltage components - Capacitor voltage transformer 400 kV. t in Hindi Current Transformer in Hindi vnclip. Transformers at substations , can be classified in different (possibly disjoint) groups, with respect to their voltage levels (power levels), function in a power grid, insulation class, or construction, etc. Autotransformers are used in a number of high-power step-down substations (for 220, 330, 500, and 750 kV), since they provide reductions of 30–35 percent in power losses, 15–25 percent in the. 220kV 132kV Current Transformer Price for Substation, US $ 800 - 1000 / Piece, Guangdong, China, Sihu 132kV current transformer, LVQB-220W(1~3) 132kV current transformer. Lot 190: SCHNEIDER Electric 11,000 Volt Transformer (Located in No. They are designed to be compact for travel on public roads, and are used for temporary backup in times of natural disaster or war. Program Description. Transformer Substation Data Sheet Nominal Current 630A Peak Withstand Current 12kV : 63kA 24kV : 50kA Short time Withstand 12kV : 21kA Current (3 sec) 24kV : 21kA 10 Electrical Terminations LV M12 HV M12 11 Overall Dimensions - Length Metres (feet) 6. In this paper, proper application of CLR to HV substations is proposed, based on a comprehensive short circuit analysis of 4 well-known substation bus bar arrange- ments. With advances in digital technology, communications and standards, this is now changing to what is known as the digital substation. 2 Isolator for Voltage Transformer. AEC-Q200 Grade 1 ( -40°C to +125°C). In the automation, we consider the voltage, current and temperature as the parameters to be monitored as the transformer shows its peak sensitivity for the same. It is used to switch generators, equipment, and circuits or lines in and out of a system. reliability. 5kV and below, the VT’s step it down to 120V) which is then fed to a relay. In larger electrical power transformer, for proper voltage regulation of transformer, on load tap changer is required. Current transformer is an instrument transformer used in substation for measurement and protection purposes. Similarly, if current in the line is 50A, then secondary of C. Voltage transformers For a transformer in no load the following is valid: 1 2 1 2 This equation gives voltage transformation in proportion to the primary and secondary turns. Rectifiers are either 6, 12 or 24 pulse. The Substation Transformer is shipped filled with insulating liquid and as completely assembled as possible. A current transformer (CT) is an instrument transformer with its primary winding connected in _?_ with the conductor carrying the current to be measured. Submit your inquiry and we will contact you Contact us; Find a channel partner. electricaltechnology. Being a customer focused organization, we are engaged in offering a wide gamut of Dry Type Electrical Transformers. The electrical current reaches the compact substations with an incoming line to the line disconnector with grounding switch leads. Log in; Current transformer (CT) testing TRAX Transformer and Substation Test System. designs and manufactures Power and Distribution (Padmount) Transformers, Preventive Auto Transformers, Transit Rectifier Power Transformers along with Transformer Rectifiers for Electrostatic Precipitators. Alternating-Current Systems. Type: Vacuum/Outdoor. This specification covers the electrical and mechanical characteristics of Eaton’s Cooper Power series 300–12,000 kVA three-phase substation distribution transformers. However, if circulating current loss is really small like some previous posts suggest, one might think they would have desired to have the loop going to another transformer in a distant substation, so that a transmission fault would not kill the closed loop like the present design. Circuit Switches direct the flow of electricity, like the switches that turn the lights on and off in your home. Note: Data entry fields for which you are required to supply information have a non-white background color. Substation transformers are most often offered with one of 3 different fluids: Mineral oil or silicone transformer oil. The three-phase power leaves the generator and enters a transmission substation at the power plant. The test and assessment of transformers is a complicated task. Sign Caution Attention. Some indoor substations (e. Different industries, hospitals, localities have their own substation where they are getting. They are located at the receiving stations and distribution substations. In instrument transformer, the primary current is the vector sum of the excitation current I o and the current equal to the reversal secondary current I s multiplied by the ratio of 1/k t. A current transformer (CT) is a type of transformer that is used to reduce or multiply an alternating current (AC). Not only for metering purposes, but CT also takes a vital role in protections. Transformer Basics and the Transformer Principals of Operation as how a Single Phase Transformer Generates a Magnetic Circuit from a Generally, the primary winding of a transformer is connected to the input voltage supply and converts or transforms the electrical power into a magnetic field. 2 Needs of transformer short-circuit current calculation Today more than ever before, the electricity grid is developing so quickly — the power plant capacity, the substation capacity and electricity loads, as well as load density, sustainably grow. Switching substation is a substation which doesn’t use transformers and it is operated in a single voltage level, it can be used as the collector and the distribution stations, it can also be used for switching the current to back-up lines and for circuit parallelizing in case of failures. Offer state – of – art technology in house design, supply, Installation, Commissioning of complete electrical projects on Turnkey basis in industrial plants, multi-storied buildings, schools, flyovers etc. Why don’t oil filled transformer manufacturers fill power transformers with something that does not burn? Actually they do. Substations - Program 37. Substations generally have: 1. Electric power substation. power=transformer represents a transformer device, as a. Transformer Specifications. Current transformers (CT’s) Current transformers (CT’s) are also measurement transformers and are used in Terminal and Zone Substations to transform large load currents and fault currents to representative values for use in protection, control and measurement systems. Our quality management system complies with and exceeds ISO 9001. Primary grid substations are located at suitable load centers where power is stepped down for supply to secondary substations in case of. Current transformer 110 kV Electrical high voltage substation Booth with equipment at energy & technology exhibition. SOCOMEC current transformers deliver to the secondary a standard current proportional to the primary current and adapted to the rating of the associated device. Electric Power eTool: Substation Equipment - Lightning Arresters. There are nine main steps to build a substation to lower the voltage generated by transmission lines, and it takes many tradespeople to meet the challenge. Steel Manufacturing Plant Medium Voltage Substation Two transformers were shipped as part of this project aimed at upgrading a major steel plant in Ohio. Transformers with HV ring-main unit (SF6 / Oil Type). See full list on electronics-tutorials. Otherwise, authorities could subject them to hefty fines or even worse measures. jpg; File:Circuit breakers at substation near Denver International Airport, Colorado. Electric power substation. Typical transmission voltage ranges are 46,000 to 161,000 volts, with typical distribution voltages being between 2,400 to 35,000 volts. Electric and magnetic fields are generated by the equipment inside the substation or transformer and the cables going in and out. However, the neutral line current flowing through the substation transformer is increased to 132 A when the TSS of the LRT adopts a single-phase transformer to supply the tram. However, it provides real-time access for controlling and monitoring the substation. Transformer Specifications. CTs are basically step-up voltage transformers, on the other hand, these are step-down transformers in view of current. Browse Auctions. We can work all across the voltage levels LV,MV,HV and EHV. Transformer Substation: The majority of the sub-stations in the power system are concerned with the changing of voltage level of electric supply. The presence of third (and other zero-sequence) harmonics at an ungrounded neutral can cause overvoltage conditions at light load. Access to the latest technology, global sourcing and up-to-date processes ensures long life and meets the most stringent needs defined by the industry. These compact substations are capable of handling voltage upto 3000 kva and 33 kv range. One of the most common questions we get asked is if T&R Electric can provide a substation transformer that will fit the current set-up. A transformer is used to transfer energy. It also adds several common substation testing functionalities, and ultimately replaces numerous individual testing devices. SOCOMEC current transformers deliver a standard current to the secondary that is proportional to the primary current and adapted to the rating of the associated energy meter. 5 This standard does not include the painting of structural steel, fencing, buildings, or other miscellaneous items within the substations. A fault leading to an open secondary could cause the primary current to overwhelm the insulation, causing the winding to short circuit. transformers installed at Cape Girardeau substation Jeremy Ford 7/23/2020 Mississippi ratifies and raises its new state flag over the state capitol. For use between 400 Hz to 1 MHz. AEC-Q200 Grade 1 ( -40°C to +125°C). The purpose of circuit was not to measure. These transformers usually range from 1. c) Current transformer d) Transformer. If a current transformer does not perform properly, there may be a huge disturbance in the system due to malfunctioning of protection relays. 2s accuracy class guarantees maximum metering, even with low loads. 5kV and below, the VT’s step it down to 120V) which is then fed to a relay. 4 kV electrical energy and for its supply to consumers in temperate climate districts (-40°C to +40°C). Typical transmission voltage ranges are 46,000 to 161,000 volts, with typical distribution voltages being between 2,400 to 35,000 volts. A measurement transformer is used to isolate the main power and convert the current and voltage in a smaller ratio to its secondary output. Lot 190: SCHNEIDER Electric 11,000 Volt Transformer (Located in No. These current transformers have the primary winding connected in series with the conductor carrying the current to. The current transformer (CT) is the essential equipment of a substation. ) consists of a 10/13 MVA and 5/7 MVA 66/22kV transformer in banked configuration supplying a single 22 kV bus with three distribution feeders controlled by ACR’s. 5 kv to 69 kV and ranging from 5 MVA to 12 MVA (ONAN). The purpose of substations is to transform the voltage from long-distance high voltage powerlines to the voltages used to supply our homes. These current transformers have the primary winding connected in series with the conductor carrying the current to. This Substation Maintenance Training course is a 12-Hour Live online instruction-led course that will cover the maintenance and testing requirements for common substation facilities. For example a 100/1A CT is connected in a line carrying 100A, and then the secondary current of CT is 1A. In this range, the measurement will be fine respective of the given accuracy class. 1 Electrical substation apparatus is coated for one or. Technically, digital substation refers to a substation that employs both IEC 61850 Process Bus and Station Bus in its protection and control architecture. Autotransformers are used in a number of high-power step-down substations (for 220, 330, 500, and 750 kV), since they provide reductions of 30–35 percent in power losses, 15–25 percent in the. The Earth Fault Current Transformer is a sensitive current transformer used to detect ground-fault current. Bar current transformers are typically used in wall, floor or ceiling openings. Hence, we design an automation system. Electricity transformer high voltage into a powerhouse of produc. • Integrates with station devices • Make linkage between dierent devices • Remote management and. A Current Transformer (CT) is used to obtain reduced current signals for purpose of measurement , control and protection. To solve this problem, substations have been placed in buildings that are in harmony with those around it, and have therefore become “invisible. Could The Transformer be another nail in the coffin for RNNs? Doing away with the clunky for loops, it finds a way to allow whole sentences to simultaneously enter The diagram above shows the overview of the Transformer model. The delta-wye transformer could be located at a utility-owned distribution substation, or the delta-wye transformer could be located at a customer-owned substation. NEXT International Electrotechnical Group is manufacturing transforming substations in concrete vessel, e. 4 kV electrical energy and for its supply to consumers in temperate climate districts (-40°C to +40°C). Browse Auctions. 2-420 kV switchgear TR01-17 Shunt capacitors. Voltage transformer (VT) which is used in this substation has a 100VA capacity and magnetization characteristic of it was modeled by single-value two-term polynomial with q=7. GE Grid Solutions Customer Benefits Excellent solution for adding metering capability to either a new substation installation or a site being. 11 Substation) Opening bid: £500. Today non-conventional current and voltage transformers have achieved high performance. (ii) Voltage transformer. Current transformer — A CT for operation on a 110 kV grid In electrical engineering, a current transformer (CT) is used for measurement of electric Spot network substation — In electricity distribution networks, spot network substations are used in interconnected distribution networks. This will take approx. It is dungarees to operate isolators in full load conditions. CTS series, designed for reception, transformation and distribution of three-phase alternating current electric. China Yb Series 33kv High Voltage Complete Compact Transformer Substation, Find details about China Compact Substation, Compact Transformer Substation from Yb Series 33kv High Voltage Complete Compact Transformer Substation - ZHEJIANG POWER TECH ELECTRIC CO. We also comply with ISO 14001 environmental standards and OHSAS 18001 health and safety standards. 5 – 20 – 34. Listen as Terrence Smith, helps put IEC 61850 into perspective by discussing the what it is, the data model, the publisher/subscriber protocol, and process bus & station bus applications. New Ameren Mo. Distribution transformers in the street reduce the voltage further to supply customers at their premises. A part of the winding is common to both primary and secondary sides. Voltage and current transformers measure voltage and current entering and moving through the substation. Current Transformer, Potential transformer Testing & commissioning: Our team of experts can give you all kinds of Testing and commissioning of Current Transformer, Potential transformer. The Substations are essentially used to change over AC (exchanging current) to DC (direct current). SF6 Gas Insulated Substations (GIS) are preferred for voltage ratings of 132 kV, 220 kV and 400 kV and above. • Current transformers • Coupling capacitor potential devices (CCPDs) 1. For the distribution substation given in Problem 14. A wide variety of transformer substation options are available to you, such as three, single. Transformer substations. Power transformers are widely recognized to be the most critical asset in the substation. To solve this problem, substations have been placed in buildings that are in harmony with those around it, and have therefore become “invisible. Most often, the older relay gets replaced with a newer relay with the rest of the installation such as Current Transformer (CT) and lead. Current transformers (CT’s) Current transformers (CT’s) are also measurement transformers and are used in Terminal and Zone Substations to transform large load currents and fault currents to representative values for use in protection, control and measurement systems. keeps investment and operation costs low. substation containing two transformers is a ‘two-transformer’ substation. The noise from the working transformer, reactor, and other electrical equipment in the substation will bring negative effect to the ambient environment. Substations transform voltage from high to low – or the reverse – or perform any of several other important functions. It is connected in series with electric energy measurement, measuring, relay protection and transient protection. Transformers Current. Electrical Substation Current Transformer Electric Utility Lineman Electrical Engineering House Design Science Engineers Hyderabad.