Heating, Ventilation and Air-Conditioning. This substation is larger than most as it was meant to distribute higher voltages to other substations. In which of the following substation … Nowadays the Gas insulated substations (GIS) are gaining popularity due scarcity of sufficient size of land to construct an Air insulated outdoor substation. ADVERTISEMENTS: In this article we will discuss about the indoor substations and outdoor substations. However the cost of GIS indoor substation is higher compared to AIS substation but it has some benefits which include high reliability, less space requirement and less maintenance. ground in the substations and mostly are being used in power sector. When planning a substation one should consider whether it is necessary to build For indoor and outdoor distribution, 4.8 kV through 34.5 kV ... Cypoxy Station Post Insulators deliver real value in substation fuse, switch, and bus applications. Pcakged Unit Substation. Urban and suburban indoor substations may be finished on the outside so as to blend in with other buildings in the area. Tracking the pros & cons of air and gas substations. 36. M Alim Ur Rahman. The substation can be supplied without an enclosure for indoor use, or with an enclosure for outdoor use. A. However, from Fig. Distribution voltages are typically medium voltage, between 2.4 and 33 kV depending on the size of the area served and the practices of the local utility. The technical requirements and the business case for this type of facility depend highly on the customer’s requirements, more so than on utility needs. More because additional building construction is required. The advantage of Outdoor Substation: Outdoor Electrical Substation is located in Outdoor that’s means there will be no rooftop. 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 Washington Park Substation at 6141 S. Prairie Avenue is an outstanding example of the many substations constructed across Chicago. b.) Extra High Voltage (EHV) Air insulated outdoor switch yard substation design and drawings is our main product for more than last fifteen (15) years. by the substation, how the system is being operated, what redundancy is required, etc. Primary B. that the cost of high voltage installations employing metal-enclosed SF 6 technology is lower than for conventional outdoor switchgear for rated voltages of 420 kV and above. Advantages : i) Easy operation: Outdoor substation is easy to operate as compared to an indoor substation. This is a comprehensive tool to determine the cost of building a substation or any small portion of it. This is significantly higher for the GIS than for the AIS solution. Unit substations are designed to convert distribution voltages to utilization voltages and can be used outdoor or indoor for commercial and industrial application. The first cost to be considered in the comparison is that of the HV switchgear installations in the substations , . All material cost is populated. 26. Advantages of Outdoor Substation (AIS): Ans : Pole mounted substation is the outdoor type cheapest form of substation for voltages not exceeding 33kV in which the equipments are installed overhead on H-pole or 4-pole structure and electric power is almost distributed in localities through such substation. 72. What is called underground substation ? Substations can be of various capacities, voltages, configurations and types depending on what is the application for which the substation is being designed. Demand for substation training courses is at an all-time high, with public-private cloud projects, more than 100 economic zones, and new power plants. Substations Customer’s need Rio Light had two old AIS Substations operating in very expensive locations (m² prices!). Series capacitors C. Shunt reactors D. Voltage transformers . Regarding construction work for indoor substation it is a bit complicated. that the cost of high voltage installations employing metal-enclosed SF 6 technology is lower than for conventional outdoor switchgear for rated voltages of 420 kV and above. View Answer. Service Conditions: Temperature: 40 degrees C, maximum ambient. 220 kV three-phase power transmission than three wire come across with transmission tower, and most of the primary gird substations were the outdoor types. Outdoor substation requires less maintenance. Equipment are installed within the building of substation to avoid the exposure of transmission line with hazardous chemicals. Disconnect Switch / Isolator. outdoor locations. Economic consideration. Air Insulated Substation (AIS) or Outdoor Substations have all switchgear equipment, busbars and other switchyard equipment installed outside open to atmosphere. In earlier days for any voltage ratings, AIS or outdoor substation is employed. Indoor Substation type is only employed in places where high pollution or the saline environment exists. 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 functioning of the system. Order: 1 Piece Outdoor Indoor More space required Less space required Less time required for erection More time required for erection Easy future extension Difficult future extension Easier fault location because of equipment being in full view. Power factor correction substations are generally located at the .....end of a transmission line A. In which of the following substation … Switching equipment for Why can the indoor type substation handle less voltage compared to the outdoor type substations? Moreover, this turnkey substation is available in two types: bloc and kit. In spite of the disadvantage, outdoor substations are very widely used in the power system. A substation in which the apparatus is equipped inside the substation building is called indoor substation. 11: Repairing & Replacement : The equipment of the indoor substation cannot easily … Less C. Almost equal D. None of the above . The expensive equipment (Switchgear equipment, Power transformer, & another protective device) are used there. (Modern substations are often a "unit" design which is even more compact.) A. low B. high C. same as D. none of the above. Compact Substations, Indoor Substation, Outdoor Substation, Control Panels, HT Panels, Cable Glands, Manufacturer, Supplier, Exporter, Nashik, Maharashtra, India Disconnectors (Isolators) are devices that are generally operated off … In these cases constructing one permanent outdoor or indoor substation for fulfillment of power supply is not economical. The thickly populated areas, the space available for building and equipment and the cost of land is very high. But sometimes non-economic factors (e.g. 33kV Substation equipment. Simultaneously, Bangladesh Automation Technologies’ Sisters Concern Substation Training Course in Dhaka has been conducting substation training with excellent reputation and success. Download PDF. Unit substations are designed to convert distribution voltages to utilization voltages and can be used outdoor or indoor for commercial and industrial application. Advantages and Disadvantages of outdoor substation over indoor substation Outdoor substation has following advantages over indoor substation. Pole mounted sub stations are used for..... distribution A. This paper. 1 Per Unit(reference value) 0.61 Per Unit. 3.1 Air circulation. Mehta Description: [Indoor] [Outdoor], articulated secondary unit substation manufactured to NEMA 210, as shown on the drawings nos. Outdoor Substation: Where voltage beyond 66 kV the equipment of the substation is installed outdoor. Cost: this includes the overall cost of running the substation. Indoor substation Outdoor substation; Less because all the components are insulated.therefore clearance required between them is less. line are not insulated hence clearance between them is more. They offer up to 25% greater dry-arcing distance than comparable porcelain insulators, resulting in fewer costly outages from animal intrusion. 2.2 GIS Substation Description A Gas Insulated Switchgear substation (GIS substation) uses Sulfur hexafluoride gas (SF6 Gas) whose dielectric strength is higher than air, to provide the phase to ground insulation for the switchgear of an electrical substation. The input for a distribution substation is typically at least two transmission or subtransmission lines. b) Outdoor compact substation: concrete prefabricated substation with outdoor operation in order to reduce dimensions. Customers requiring shorter overall delivery times and minimal on-site work have been the main drivers for RWW development of containerised outdoor substations. II.1.3. substations: a)Indoor compact substation : equipment with three compartments (MV switchgear, transformer and LV distribution board) on a moving (with wheels) metallic chassis. Capital cost of outdoor substation is ____ than indoor substation of the same rating. 44. The length of the control cables increases which increase the cost of the substation. The disadvantage of GIS gas insulated substation: 1. Distribution substation A distribution substation transfers power from the transmission system to the distribution system of an area. Figure 2 – Layout of double busbar GIS. The wind speed is not more than 35m/s; 5. Capital cost of outdoor substation is ____ than indoor substation of the same rating. The following advantage can be found by an outdoor substation. However the cost of GIS indoor substation is higher compared to AIS substation but it has some benefits which includes high reliability, less space requirement and less maintenance. A. low B. high C. same as D. none of the above. Substations may also be owned by manufacturing, industrial, or large commercial customers; instead of being owned by the power utility, if the distribution substation is a direct supply from the transmission entity to the customer.Substations can also operate at many different voltage levels. The design of grounding system for GIS indoor substation is different from conventional AIS. Due to this, large space is required for the normal or Air Insulated Substation (AIS). Gas Insulated Substations are used where there is space for providing the substation is expensive in large cities and towns. Earthquake level acceleration ≤0.4m/s2, vertical acceleration ≤0.2m/s2. In normal substation the clearances between the phase to phase and phase to ground is very large. 1 Per … Fault location in indoor type substation is____ A. easy B. difficult C. depend on type of fault D. none of the above. The cost required for the installation of indoor substations is very small. Reference: “Power system” by V.K. Liquid-Filled Substation Transformers Application Description Eaton’s liquid-filled substation transformers are custom-designed power transformers suitable for both indoor and outdoor applications. Package unit substation normally designed in compact size applied in indoor and outdoor secondary distribution system. 6. Cost: The cost of the indoor substation is low. Indoor substations. The higher initial cost of the core material is offset over the life of the transformer by its lower losses at light load. The higher the voltage rating, the greater the saving, as 38kV Reclosers are significantly cheaper than corresponding Substation Circuit Breaker equivalents. 1 the difference in system costs is smaller than the difference in component costs such as switch bay. The second type of substation, typically known as the customer substation, functions as the main source of electric power supply for one particular business customer. The construction is more expensive. A short summary of this paper. One substation, in particular, faces a threat of demolition by neglect. - Rockwill's pre-fabricated substation i.e Compact substation is comprising of main: >>> Outdoor enclosure. A typical electrical substation has transformers and various protection hardware (circuit breakers, fuses, and sometimes power factor correction hardware). Ans : The following factors are to be considered in selection the site of an outdoor type substation :- a) The site should be located closed to the centre of its supply area. Some of the advantages and disadvantages of outdoor switchyard is discussed below. distribution substations in MEA: air insulated outdoor substations (AIS) and gas-insulated substations (GIS) in MEA. The Lansing Board of Water & Light’s new Central Substation in the city’s historic REO Town neighborhood features a two-sided, 425-square-foot living wall installed with the LiveWall ® Outdoor Living Wall System.Completed in July 2019, the living wall greens up the exterior of the new substation and establishes a visual link to the Scott Sunken Garden. b) Sufficient land is to be available at a reasonable cost and without much difficulty for the construction of substation and the accommodation of the operating staff. Such substations are usually for a voltage up to 11,000 V but can be erected for 33,000 V and 66,000 volts when the surrounding atmosphere is contaminated with […] 43. 42. Sending ... An indoor Sub Station is .....expensive than outdoor Sub Station A. Indoor Air-Insulated Substations. Indoor Substations: In these substations, the apparatus is installed within the substation building. ... GIS is more expensive than AIS. In a substation the following equipment is not installed A. Exciters B.
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