Nairobi | Energy Cabinet Secretary commissions GIS substation

May 29, 2018 · Kenya’s Energy Cabinet Secretary Hon. Charles Keter commissioned the 220/66kV Gas Insulated Switchgear (GIS) substation located at the city centre on Monday. The substation is part of the Nairobi City Centre Network Upgrade and Reinforcement Project that is aimed at improving the flexibility of the power distribution system in Nairobi. Kenya Power noted in a statement that the project is being implemented by TBEA of China at a cost of KShs.13.2 billion ($128 million), funded by the EximGet price

SCOPE OF WORK - SUBSTATION - Kenya Power | kplc.co.ke

Kenya Power and Lighting Company VI 4.2 - 3 Contract A35 KENYA POWER Funded Project Technical Specifications and Drawings 4.1.4Contr A35-Section VI SOW-substation May 2014 KPLC g. 1 (one) lot of necessary interposing relays, MCB’s, terminal blocks and wiring to form a complete operative bay control.Get price

Preventive maintenance of substation equipment and

Sep 30, 2019 · The initial equipment cost of GIS is usually higher than that of conventional Air Insulated Substation (AIS). Preventative maintenance of substation equipment and transmission lines. The advantage and life cycle cost analysis are generally considered before deciding for GIS. The land area required for a GIS substation is in the order of 10% to 20% of that for an AIS substation considering the switchgear bay.Get price

SECTION VI PARTICULAR TECHNICAL SPECIFICATIONS - Kenya Power

Kenya Power and Lighting Company VI 4.1.6- 3 Contract A35 KENYA POWER Funded Project Technical Specifications and Drawings 4.5Contr A35-Section VI-Spec 33kV GIS Switchgear docx May 2014 KPLC IEC60507: Artificial pollution test on HV insulators to be used on ac systemGet price

Construction and Service Life of GIS Substation - An

May 25, 2019 · GIS is assembled of standard equipment modules (circuit breaker, current transformers, voltage transformers, disconnect and ground switches, interconnecting bus, surge arresters, and connections to the rest of the electric power system) to match the electrical one-line diagram of the substation.Get price

Gas insulated substation (GIS) versus Air insulated

Oct 28, 2020 · The maintenance cost of GIS and AIS shall be equivalent. The cost for training in GIS is higher than in AIS. 4. Outage cost. Since the failure rate of GIS is lower, the outage cost of AIS shall be greater. 5. Disposal cost. The cost of decommissioning and disposal after use should be capitalized. The value of future expense must be taken intoGet price

The Top 25 Gas Insulated Substation (GIS) Companies

Nov 27, 2017 · A substation is considered as one of the vital element of power system infrastructure. Presently there are two types of substations primarily being used: Air Insulated Substation (AIS) and Gas Insulated Substation (GIS). In the past few years, demand for gas insulated substation has gained wide momentum across several countries.Get price

Gas-Insulated Substations - GIS

Nov 10, 2010 · A gas-insulated substation (GIS) uses a superior dielectric gas, insulating gas, at moderate pressure for phase-tophase and phase-to-ground insulation. The high voltage conductors, circuit breaker interrupters, switches, current transformers, and voltage transformers are in gaz sf6 gas inside grounded metal enclosures. The atmospheric air insulation used in a conventional, air-insulated substation (AIS) requires meters of air insulation to do what Sulfr hexafluoride can do in centimeters.Get price

HV SUBSTATION PROJECT - Matelec Group

HV SUBSTATION PROJECT BANIAS 230/66kV GIS S/S: SYRIA MAIN PROJECT (9) 230kV Line, (6) 230kV Inc. Generator, (3) TR 230/66kV 125MVA. conducting regular meetings toGet price

GIS 400kv substation - SlideShare

May 17, 2018 · GIS 400kv substation equipment one and half breaker scheme Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. If you continue browsing the site, you agree to the use of cookies on this website.Get price

GIS Substation Design and Execution HV and EHV GIS

2014/04 - Houston - CED – GIS - 3 GIS introduction 1/7 Sulfr hexafluoride properties 1/3 zA GIS is the implementation, within a complete HV substation, of the remarkable sulphur hexafluoride (sf6 gas) properties in terms of voltage withstand and current interruption zsf6 gas main data zNeutral gas: insulators and live parts are perfectly protectedGet price

Tracking the pros cons of air and gas substations

Jun 28, 2018 · Therefore reliability is relatively low compared to indoor substations. More regular maintenance is required on outdoor substations than on indoor substations. This is obviously due to the fact that AIS equipment is exposed to the outside environment. GIS advantages • It occupies much less space (1/10th) compared to ordinary substations.Get price

Design study for 33/11 kV substation, distribution and

Substation specific design. The substation would be a combination of switching, controlling, and voltage step-down equipment arranged to reduce sub-transmission voltage to primary distribution voltage for residential, commercial, and industrial loads.Get price

Medium Voltage blue GIS | Systems | Siemens Global

8DJH 12 – blue GIS for sustainable substation BKK Nett AS in Bergen, one of the most innovative Utilities in Norway, had a clear goal for a new MV switchgear for distribution substation: A compact ring main unit that would operate more sustainably, reliably and economically and could work at very low operation temperatures.Get price

Gis substation - SlideShare

Jul 12, 2014 · Limitation of AIS 4. Need for GIS 5. Introduction to GIS 6. Service condition of GIS as per IEEE 7. Services offered by GIS user GIS supplier 8. Technical requirements design features 9. Maintenance philosophy of GIS switchgear 10. Comparison of GIS and AIS substation 11. Drawbacks of GIS 12. Growth of GIS substation 13. Future trends inGet price

VOLUME II PART 2 SECTION VII W REQUIREMENTS - Kenya Power

volume ii part 2 section vii–works requirements lot 1: narok-bomet transmission line and line bays lot 2: kipevu-mbaraki transmission line and substationsGet price

5 Differences Between Air-Insulated Substations and Gas

ConstructionInstallationOperationMaintenanceTotal Cost of OwnershipGIS high voltage substationengineering uses the gas sulfur hexafluoride for insulation, whereas AIS uses air insulation in a metal-clad system. Sulfur hexafluoride is five times heavier than air and offers excellent extinction behavior. Another significant construction-based difference between the two switchyards is that a metal-clad AIS uses three-position draw-out circuit breakers (on, off and test). GIS systems use fixed, mounted circuit breakers. The sealed mounted breakers are a ‘sealed-for-life’ technology, whereas the AIS breaker can be removed for maintenance and troubleshooting.Get price

Gas Insulated Switchgear : Working, Testing Its Applications

ComponentsAdvantagesDisadvantagesGas Insulated Switchgear ApplicationsThe Gas-insulated switchgear design can be done using different components like circuit breakers, bus bars, disconnectors or isolators, transformerslike voltage and current, earth switches, lightning arresters, and surge arrestors. When the substation is connected with gas-insulated switchgear then it is called GIMES or gas-insulated metal-enclosed substation. This kind of technology is not invented recently but it is available for the past 30 years. In gas-insulated medium-voltage switchgear, sf 6 gas works like an insulation material whereas the vacuum technology is mainly used for the purpose of interrupting. Even though, for both insulation and interruption, the insulating gas gas can be used in several medium voltage gas insulated switchgear systems. However, for such devices, insulating gas gas pressures are dissimilar for insulation as well as an interruption. For insulating, this gas pressure is usually kept under 2.5 bar, whereas for interrupting, it is ranged from 5 – 7 bar.Get price

Kenya Power | kplc.co.ke

Kenya Power owns and operates most of the electricity transmission and distribution system in the country and sells electricity to over 2.6 million customers (as at April 2014). The Company’s key mandate is to plan for sufficient electricity generation and transmission capacity to meet demand; building and maintaining the power distributionGet price

sf6 gas (GIS) gas insulated substation Manufacturer in China

So the GIS gas insulated substation is the best choice for the projects which is small space of compact design. 2. Because of the Sulfr hexafluoride gas in the sealed tank, so the gas insulated substation components work in stable condition, it will be much less fault than the air-insulated substation. 3.Free maintenance due to the reliable performance.Get price

Purpose-built ­substations for the data center industry | ABB

Aug 20, 2020 · In short, the new substation design reduces site construction time and lowers risk. 03 Compared with systems in traditional substations, digital gas insulated switchgear (GIS) saves more than 30 tons of material transport for an average substation with seven feeders.Get price

Kenya commissions Nairobi City Centre 220/66kV substation

May 31, 2018 · Kenya has commissioned the Nairobi City Centre 220/66kV Gas Insulated station (GIS) substation, which is intended to boost the City’s Bulk power supply system. Image: Officials during the launch of new substation in Kenya. Photo: courtesy of Ministry of Energy. The substation has been inaugurated by Kenya President Uhuru Kenyatta.Get price

ANSI MV GIS compact switchgear SafePlus - Gas insulated

SafeRing (ring main units) and SafePlus GIS with Sulfr hexafluoride up to 40.5kV SafeRing Air (ring main units) and SafePlus Air with GIS based on dry air technology as insulation medium (No gaz sf6) up to 12kV SafeRing Air Plus (ring main units) and SafePlus AirPlus with AirPlus gas as insulation medium (No Sulfr hexafluoride) up to 24kVGet price

Containerized and prefabricated substations

Applications range from small distribution systems to integration of renewable generation. Fast erection and dismantling also makes them easy to relocate and well-suited for usage as auxiliary substation during repair or maintenance of existing primary substations.Get price

International Energy Technik Group | LinkedIn

IET installed commissioned this 132kV outdoor Gas Insulated Switchgear (GIS) substation in 2007. A highlight of GIS technology is that it is Maintenance Free under normal operating conditionsGet price

Laois-Kilkenny Reinforcement Project

2.1 AIS Substation Description 6 2.2 GIS Substation Description 6 3 GIS and AIS Substation Sizes 7 3.1 AIS Substation Size 7 3.2 GIS Substation Size 7 4 Maintenance Operational Flexibility 8 4.1 AIS Maintenance Requirements 8 4.2 GIS Maintenance Requirements 8 4.3 AIS v GIS – Operational Flexibility 8Get price

GAS INSULATED SUBSTATION (GIS) ARRANGEMENT CONSTRAINTS

The modular design of GIS components offers a high degree of flexibility for any single line diagram specified. Considering the high reliability of today’s GIS components, with over 2000 operations before maintenance, simplified arrangements with less redundancy could be a way to reduce costs, particularly in stations with limited outage cost.Get price

Gas Insulated Substation (GIS) Electrical Power System | Udemy

Because the substation is enclosed in a building, a GIS is less sensitive to pollution, as well as salt, sand or large amounts of snow. Although the initial cost of building a GIS is higher than building an air insulated substation, the operation and maintenance costs of a GIS are less. The primary applications for gas insulated substationsGet price

ABB powers Africa’s largest gas-insulated switchgear installation

Feb 07, 2019 · The Sebenza substation features 38 bays of 132 kilovolt (kV) gas-insulated switchgear (GIS) from ABB, making it the largest installation of GIS at this voltage level to be commissioned in Africa. ABB also supplied 132 kV, 275 kV and 400 kV circuit breakers, surge arresters and point-on-wave controllers that remove electrical transients in theGet price