An Introduction to Gas Insulated Electrical Substations

Early cost comparisons of GIS projected that, on the basis of a total installed cost, The cost of a GIS would equal the cost of an AIS when the voltage of the substation reached the 345 kV range. As voltages went above the 345kv threshold, GIS facilities would be the cheaper alternative over AIS.Get price

National Transmission Modernization 1 Project

Sep 20, 2017 · Government of Pakistan (GoP) to increase the availability, reliability and efficiency of selected segments of the national transmission system in Pakistan. National Transmission and Despatch Company (NTDC) is the executing agency of the Project for which the GoP has applied for a loan fromGet price

8- Gas Insulated VS Conventional

GAS INSULATED SUBSTATION (GIS) Vs CONVENTIONAL OUTDOOR SUBSTATION (AIS) By ENGR. RIAZ AHSAN BAIG Year of Publication 2004 0 ABSTRACT The author in his paper has made comparison of Gas Insulated Substation (GIS) with Conventional Air Insulated Substation (AIS). According to the author GIS are much more reliable, compact and maintenance free.Get price

Chapter 6 Substation and Transmission Line Facilities

a) Both 400kV and 132kV GIS is indoor type. b) The overall area dimensions of the substation will be considered as 320m x 270m including temporally storage area, site offices etc. c) The 400kV GIS outgoing feeders are connected to 400kV Over Head Transmission Lines. d) 400kV GIS and 250MVA/3 transformers are connected by overhead conductors.Get price

World Bank Document

selected segments of the national transmission system in Pakistan and modernize key business processes of the National Transmission and Despatch Company. Components Component Name Cost (USD Millions) Expansion and Upgradation of the Transmission Network 344.56 Deployment of the Enterprise Resource Planning System 29.46Get price

Humidity Effects, Partial Discharge Loss Of Substation

Oct 22, 2019 · Typical relative humidity (RH%) in the UK is between 65% – 95% in an internal substation environment. Where there are cable trenches and basement ducts adequate cable sealing must be adopted to prevent water ingress in “normal” and “flood” conditions.Get price

Gas Insulated Switchgear and GIS - EA Technology

High Voltage GIS Substations • AIS versus GIS substations • Basic GIS substation lay-outs • Indoor and outdoor GIS • Economics and reliability of GIS • Hybrid switchgear as an alternative to GIS substations • Special GIS substations: mobile and temporary substations Applications of Gas Insulated Switchgear in Medium Voltage SubstationsGet price

Gas Insulated Substations VS Air Insulated Substations | BLUE

Feb 12, 2020 · GIS Substation Simply put, in the GIS system, all the live components are enclosed in a grounded metal enclosure, then the whole system housed in a chamber full of gas. Gas insulated substations (GIS) primarily use sulphur hexafluoride gas as the primary insulator.Get price

Construction of 33/11Kv GIS Substations (2 x 31.5 MVA

Construction of 33/11Kv GIS Substations (2 x 31.5 MVA) Section (1) TECHNICAL SPECIFICATION D-01C Jan 2016. 2 2 Air Humidity Maximum 92% at 40°C Minimum 12%Get price

GIS Substation Design and Execution HV and EHV GIS

2014/04 - Houston - CED – GIS - 3 GIS introduction 1/7 sf6 gas properties 1/3 zA GIS is the implementation, within a complete HV substation, of the remarkable sulphur hexafluoride (insulating gas) properties in terms of voltage withstand and current interruption zsf 6 main data zNeutral gas: insulators and live parts are perfectly protectedGet price

Umair Ahmad - Manager - Substation Design - SIEMENS Pakistan

Ltd. Jun 2011 - Nov 20154 years 6 months. Karachi, Pakistan. Business Unit : High Voltage Substations. Division : Transmission Distribution. Sector : Energy. Preparation of Primary Engineering Design documentation in light of project technical specifications relevant standards. Balance of plant for air insulated and gas insulated switchgears.Get price

HV Substation Service Modular substations type ST7

site work fielding substantial cost savings – Re-using substation designs facilitates both system operations and maintenance by reducing the need for staff training and spare part handling Space constraints and low temperature applications – Our compact and optimized GIS design requires onlyGet price

High-voltage substations | High-voltage – Power transmission

High-voltage substations, the node points of today’s complex power transmission infrastructure, play a key role in meeting this demand safely and reliably. Siemens supplies them on a turnkey basis. Wherever you are, Siemens is your reliable partner for the one-stop planning and construction of customized, state-of-the-art high-voltageGet price

Zeeshan Farooq - PMI - Pakistan | LinkedIn

• Cost controlling and identification and realization of new… Worked on below mentioned Substations and SVC (Static VAR Compensator) Projects. •380 KV SVC AT HAIL-2 AND SVC AL-JOUF-2 SUBSTATIONS •CLOSING OF 132 KV QASSIM CAPACITOR BANK PROJECT •MODIFICATION WORKS AT 132/13.8 KV S/S 8714 My responsibilities included:Get price

INNOVA 3731 - Sulfr hexafluoride leak detection system for enclosed GIS

Humidity Max relative humidity 80% for temperatures up to 31°C decreasing linearly to 50% relative humidity @ 40°C Altitude Up to 2000 m Other Environment UL 61010A-1: Environmental conditions Pollution Degree 2 Installation Category II Indoor Use Enclosure IP 20 Dimensions (W x H x D) 483 mm (19") x 4U (monitor) + 4U (sampler) x 375 mm (14.8")Get price

GIS substations - Hitachi ABB Power Grids

The robust and low maintenance GIS based design minimizes the substation’s footprint by as much as 70 percent, enabling it to be installed indoors, in busy urban areas and in harsh environments. Our in-depth knowledge of the power value chain, as well as grid codes and utility practices in use around the world, enable us to provide turnkeyGet price

Gas Insulated Substation (GIS) Electrical Power System | Udemy

The higher the voltage, the more favorable gas insulated technology becomes. The footprint of 765kV conventional substation is enormous, and GIS technology allows a significant size reduction. Urban Installations. GIS technology can be used for installations in areas where the cost of real estate or aesthetic appeal is a significant consideration.Get price

Muhammad Saleem - Testing Commissioning Manager - Mansour

04 years’ experience in; Testing and Commissioning of protection control schemes at 300kV, 220kV, 132kV and 33kV substations. Testing and commissioning of up to 300kV substation equipments, protection panels, control panels and protection relays like distance relay, transformer differential relays, line differential relays, O/C relays and directional relays of ABB, Siemens, Areva.Get price

Medium Voltage blue GIS | Systems | Siemens Global

8DJH 12 - blue GIS for Siemensstadt in Berlin. As the owner of the power distribution grid and the associated electrical equipment, Stromnetz Berlin GmbH ensures the safe and reliable power supply to the German capital. With the innovative 8DJH 12, a switchgear using Clean Air as insulating was put into operation in a medium-voltage compactGet price

Global Substation Market Report 2019: Includes Over 7,000

Dec 09, 2019 · 3.2. Focus on GIS substations 3.3. Focus on digital substations 3.4. Offshore substations 4. Market size and growth 4.1. Current state of the transmission substation market, 2019 4.2. Key growthGet price

Gas Insulated Medium Voltage Switchgear - ABB

Humidity - Daily average relative humidity≤95% - Monthly average relative humidity≤90% - Daily average vapor pressure≤2.2×10-3MPa - Monthly average vapor pressure≤1.8×10-3MPa The surrounding environment shall not suffer obvious pollution caused by corrosive, flammable or explosive gasGet price


GIS partitioning Buffer compartments to avoid de-gassing of disconnector compartments and loss of Line 4 In the example the substation has a total number of six feeders, four line and two transformer feeders. The busbars are divided by a busbar separation and linked with a coupler. A future extension is planned at the right side of the substationGet price

Taimoor Nafees Bajwa - Team Lead | Consultant Engineer

The substation is comprising One no. 132kV gaz sf6 Gas Insulated Switchgear (GIS) with ten nos. 132kV GIS Circuit Breakers and associated equipment, three nos. 132/13.8kV, 67MVA, Power Transformers, with 132KV double bus bar arrangement, with one bus section with CB, one bus section without CB, and two bus coupler CB, One 13.8kV Switchgear withGet price

Alpine Enterprises

Alpine Enterprises is a professional engineering company specializing in the practice of design engineering. Alpine Enterprises provides professional Design Engineering and Consultancy services for clients in Power System design, transmission distribution systems etc. With commitment to provide end-to-end solutions, Alpine’s expertise liesGet price

Tips for selecting between air-insulated and gas-insulated

As the voltage decreases, metal-clad switchgear is more cost-effective, as the cost of metal-clad switchgear is less at lower voltages, while the cost for GIS remains similar across voltage ratings. For equipment at 5/15 kV voltage classes, cost of GIS can be upward of two or even two-and-a-half times as much as metal-clad equipment.Get price

Irfan Elahi - EPC Project Management - Burns McDonnell

• Completed two 110/13.8 kV GIS substation construction turnkey projects, starting from initiation of project to on-site delivery and customer project acceptance, which includes, base andGet price


Barqtron is able to produce and manufacture top quality steel structures, plant material, conduits, cleats, trays and other related substantials for projects. We are able to negotiate and supply all bankable technology from OEM’s as well as world class services suitable to the project at the best possible terms.Get price

Behrad Fattahi, EIT - Structural EIT, Power - WSP in Canada

- Generate innovative reporting on each substation project, identifying potential issues and implementing strategies to resolve conflicts. - Notable projects include Gwader 203/132kV GIS Substation (Pakistan), Daryan 230kV Power Plant Substation, Gha’en 400kV Power Plant Substation, Mahallat 400kV/63kV Substation, and Babol 230kV/63kV SubstationGet price

Swajjal Rastogi - Electrical Design Engineer - SMEC india pvt

1) Involved in Designing, Reviewing of all electrical drawings, documents calculations of 400/220/132/33 kV AIS GIS Substations of Indian Overseas projects (Iraq, Ghana, Afghanistan Pakistan). 2) Involved in planning designing of complete power network inside Hyderabad Pharma city spread over 17000 Acres.Get price