All the conductors in the wiring diagram should be marked at each end with the location of the far end of the conductor (bi-directional labeling). You can purchase annually based Plus, Pro, or Enterprise membership. The equivalent single-line diagram is depicted in Figure 2c. 3.13 Example For work Access Equipment No. 2. The connection of the substation is divided as. Diagrams of DC connections illustrate the direct current circuits in a substation and should clearly show the various connections to the DC auxiliary services. Covers the layout considerations, bus configurations, and electrical clearances. Study substation design subjects at a level appropriate for those relatively new to the field. 31 1078 Rev. 31 1079 Rev. In addition, every conductor in each cable should be numbered. Figure 15: Voltage drop study. Template Drawings are intended to be revised and renumbered ... EMC within Power Plants and Substations, Working Group C4.208 . The protection engineer is thus able to ensure that he can safely locate protection equipment within the substation. Its emphasis is on communicating the functions of the power equipment and the associated protection and control system. Beside this, it’s also important the performance of relays and the criteria for setting these. Volume IV, Power Transformers. My experience in drafting the layout & arrangement drawing of 33/11 kV distribution substation. The different types of layout for substation are explained below in details. The substation is the part of an electrical supply system which transmits the high voltage from the generating substations to the local distribution networks. Actively involved in design and supervision of LV/MV substations, power supply augmentations and electrification for utilities and bulk consumers like airports and commercial entities. SUBJECT: Design Guide for Rural Substations TO: All RUS Borrowers RUS Electric Staff EFFECTIVE DATE: Date of approval. Each substation is different in terms of their arrangement and design parameters. The layout should make the most of available space by reducing the footprint and meeting all the requirements of future proof and ideal substation design. See more ideas about electrical substation, electrical cad, electrical layout. The first step in planning a substation layout is the preparation of a one-line diagram, which shows in simplified form the switching and protection arrangement required, as well as the incoming supply lines and outgoing feeders or transmission lines. For example, current and voltage transformers that may be located separately from other items of equipment or placed within high voltage equipment such as circuit breakers. The ability to change the virtual materials of 3D models also … In single line representation of substation the electrical components such as power transformers, incoming and outgoing lines, bus-bars, switching and protecting equipments, are represented by standard symbols and their interconnections between them are shown by lines. Power Substation Design Using 3D CAD. Get access to premium HV/MV/LV technical articles, electrical engineering guides, and papers. INSTRUCTIONS: This bulletin is an update and revision of previous REA Bulletin 65-1, “Design Guide for Rural Substations” (revised June 1978). Thanks for systematic information and bird eye view of diagrams about which engineers talks oftenly. As a minimum, the AC diagram of a transformer should include all the equipment in the bay between the high voltage busbar and the secondary bushings of the transformer. A single-line diagram shows the disposition of equipment in a substation, or network, in a simplified manner, using internationally accepted symbols to represent various items of equipment such as transformers, circuit breakers and disconnectors, generally with a single line being used to represent three-phase connections. Substation layout diagrams provide scale drawings of the location of each piece of equipment in a substation, in both plan and elevation. Different Layouts for Substations (single busbar, mesh, 1 1/2 cb) 6. In this article, we will share the most important design aspects for drafting the layout and arrangement drawing of 33/11 kV outdoor (AIS) medium voltage substations. 19. GIS Substations. The internal circuits of the protection equipment are not shown, since it is sufficient to indicate the tripping contacts and the points of interconnection with other equipment inside a dotted rectangle. More detailed single line diagrams include such items as the instrument transformers and the protection, measurement and control equipment and their associated secondary wiring. Tell us what you're thinking... we care about your opinion! (g) Meeting the requirements for future ultimate development. C – Floodlighting Units 22. The single line diagram of the 33kv substation is depicted in the figure below. Each device should be represented by its schematic, with every terminal located in accordance with its actual position on the panel. Often the main data for the HV equipment are included in the diagram. The electrical drawings are usually needed for connecting power and control cables to the equipment. Sir, I’m muralidhar from India I completed my engineering in the year 2014 as an electrical and electronics engineering . 31 1075 Rev. The following layout designs of indoor distribution substation are typical only and should not be used as construction drawings as they are presented as an example. Solid-state protection relays should be represented schematically by squares, showing the number of terminals and the method of connecting the wiring carrying the voltage and current signals. The positive infeeds are normally shown at the top of the diagram, and the negative ones at the bottom, and, as far as possible, the equipment included in the diagrams should be drawn between the positive and negative busbars. The layout of AC connections diagrams should be carried out observing the following points: Each diagram should include all equipment corresponding to a bay, with breakers, disconnectors and transformers represented by schematic symbols. Figure 2a and b shows the plan and elevation drawings for a typical layout of two 115-kV bays, one for a transmission line and the other for the HV side of a local transformer, connected to a single 115-kV busbar. The earthing systems for a substation must have a minimum design life of 50 years. Proposed substation details are to be submitted for 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. Given the complexity of distance relays, it might be necessary to make a separate diagram to indicate their connections to the DC system and the interconnection of the terminals. These diagrams are required to facilitate the wiring of the measurement, protection and control equipment at the substation construction stage. SUBSTATION LAYOUT Design and considerations 2. It is useful to indicate equipment whose future installation can be foreseen by means of dotted lines. C – Substation Standards Danger Sign for Shunt Capacitors 23. The two supplies should be kept independent of each other, and care should be taken to avoid connecting any equipment across the two DC supplies. In this article, we will share the most important design aspects for drafting the layout and arrangement drawing of 33/11 kV outdoor (AIS) medium voltage substations. Study specialized technical articles, electrical guides, and papers. Electrical Substation Design Fundamentals. Cabling lists provide information on the multicore cables that run between various items of equipment and help to make it easier to verify the substation wiring for maintenance work. Within the electrical design function, the basic diagrams used are the: A brief mention of these is given in the following paragraphs. The content is copyrighted to EEP and may not be reproduced on other websites. Single Line Diagram (SLD) The single line diagram (SLD) is the most basic of the set of diagrams that are used to document the electrical functionality of the substation. The input for a distribution substation is typically at least two transmission or subtransmission lines. Get access to premium HV/MV/LV technical articles, electrical engineering guides, research studies and much more! Wiring diagrams show the interconnection of the multicore cables, for example, between the switchgear and the associated control panels, and the routing of individual wires to the equipment installed in the relay and control panels. Unless the utility provides HV to MV transformation, power shall be received at 115 or 230 kV or higher voltage level . Basics 12 12-/208 VAC Panel Diagram : Basics 13 Valve Limit Switch Legend : Basics 14 AOV Schematic (with Block included) Basics 15 Wiring (or Connection) Diagram : Basics 16 Wiring (or Connection) Diagram : Basics 17 Tray & Conduit Layout Drawing : Basics 18 Embedded Conduit Drawing : Basics 19 Instrument Loop Diagram Power distribution substations are mostly installed near load centers. Results are incorporated in the following drawings: – Substation lighting plan drawing: Voltage drop calculations. OFFICE OF PRIMARY INTEREST: Transmission Branch, Electric Staff Division. This page requires a Premium Membership. Introduction 2. Power shall be distributed at 34.5 or 13.8 kV from main substation to unit substations. Volume III, Conductors and Bus Design. Principle of Substation Layouts (spatial separation, maintenance zones) 7. The Manager Substation Design is the Subject Matter Expert (SME) for the content and shall Some owners may keep the major equipment drawings separate from the substation drawings. A diagram of AC connections generally shows the three-phase arrangement of the substation power equipment, and the AC circuits associated with the measurement, control and protection equipment, in schematic form. Equipment Ratings . This is a generic guidance drawing that is deemed suitable for construction. Subtransmission Substation. It helps you. Layout of Substation 5. Between the generation and distribution, the voltage may vary through several substations. Learn about power engineering and HV/MV/LV substations. While individual utilities may have their own format, there is a high degree of standardization of these types of drawings worldwide, for contractual and tendering purposes. The single line diagram of an 11 KV substation is shown in the figure below. Voltage transformer circuits should be drawn physically separated from the rest of the circuits, and the connections to the coils of the instruments that require a voltage signal should also be indicated. Mar 1, 2017 - Explore Edvard Csanyi's board "Power Substations", followed by 787 people on Pinterest. Medium voltage substations fall within the sub-transmission power system category, which feeds the bulk consumers directly or facilitates the secondary and tertiary distribution to small industrial and household consumers over an area after a suitable stepping down of voltage. These diagrams represent the protection schemes for the different substation bays by means of normalized logic structures in order to show in a structured manner the behavior of the substation protection system for any contingency. drawings related to designing a substation. Earthing and Bonding 3. Distribution substation A distribution substation transfers power from the transmission system to the distribution system of an area. An example of such a diagram for a 115-kV line bay at a substation is shown in Figure 2. It’s well organized. Silicon Engineering has the necessary know-how for creating the Electrical Design of high voltage Substations. Substation layout diagrams provide scale drawings of the location of each piece of equipment in a substation, in both plan and elevation. Every terminal should be uniquely identified on the drawing. It is logical that the layout of the different devices on the wiring diagrams should be as seen from the rear of the relay and control panels, as in practice. I had 2 years of experience in erection works I want to upgrade as an electrical engineer suggest me how to upgrade. construction, that the details on this drawing are correct as per SUB-03-017. Factors affecting the layout and arrangement of substations, Provisions for easy maintenance and future expansions, Operation flexibility and protection arrangement, Specific design requirements of substation layout and arrangements, Busbar layout alternatives in switchyard for 33/11 kV substations, The access road, Station supply, and illumination. The working of the electrical equipment used in the substation is explained below in details. Proper construction of electrical equipment in most 3D software also allows for efficient go-by production, as elements can be plugged in or removed in minutes, and entire substations can be remodeled according to revisions or to create whole new designs. Main Components of 11kV Substation. For fulfilling these huge power demands the modern time requires creation of bigger and bigger power generating stations. 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