Oil and gas electrical jobs in australia,online check in delta usa,heavy bob body opponent bag - Step 3

10.03.2015
ESA VIRTANEN, ALPER AKDAG - As engineers place ever more infrastructure under our seas, the demand for electrical power there rises correspondingly. ABB is an innovator in subsea electrical solutions and has been involved in the development of subsea electrical equipment for many years. The 800 kV North-East Agra UHVDC (ultrahigh-voltage direct current) link will have a record 8,000 MW converter capacity, transmitting clean hydroelectric power, equivalent to the generation of 8 large power plants, from India's northeast region to the city of Agra, a distance of 1,728 km. ABB's Gary Rackliffe, Vice President Smart Grid, blogs a North American perspective on smart grid trends and technologies. I got this Schneider Electrical Installation Guide for free when attended the Lunch & Learn Session - IEC 61439 LV Switchgear Type Test conducted by Schneider Electrical on 3 November 2011 at Doubletree by Hilton Hotel, KL.
This guide has been written for electrical Engineers who have to design, realize, inspect or maintain electrical installations in compliance with international Standards of the International Electrotechnical Commission (IEC).
The aim of the present guide is to provide a clear, practical and stepby- step explanation for the complete study of an electrical installation, according to IEC 60364 and other relevant IEC Standards. Here i attached the electrical symbols and legend for single line diagram or one line diagram that commonly used. Wood Group Mustang is a global leader in oil & gas project management, engineering and procurement. Feasibility studies on subsea components began in 1984 and the first commercial subsea transformer was delivered in 1998. As the Standard must be extensive, and has to be applicable to all types of products and the technical solutions in use worldwide, the text of the IEC rules is complex, and not presented in a ready-to-use order. Special attention must be paid to the EMC appendix, which is based on the broad and practical experience onelectromagnetic compatibility problems.
With a philosophy of People Oriented…Project Driven, we offer the opportunity to work on exciting and challenging world-class projects with people who are the best in the industry.
ABB is the only company in the world delivering transformers that work at depths of up to 3 km. Since then, ABB has delivered transformers and variable speed drive systems to some of the largest and most advanced offshore developments in the world.
The Standard cannot therefore be considered as a working handbook, but only as a reference document.
The pressure-compensating system keeps the internal pressure close to that of the outside water by immersing the internals in liquid and eliminating all air- and gas-filled voids.
The unit can be delivered with a single or double shell and has been qualified for depths of up to 3,000 meters.
Subsea environments are extreme, hazardous and costly places even to reach, let alone to use as sites for industrial equipment ? 1.


Often, to maximize oil extraction, seawater or gas is pumped into the well to increase pressure and drive out the remaining fuel trapped beneath the seabed. As these are at much greater distances from the shore, they present additional challenges to the industry. Operations here require specialized knowledge and expertise, particularly when powering compressors, pumps and motors at depths of several kilometers, possibly 50 or 100 km away from the shore.
The performance levels required of deep-sea equipment are very high and reliability is decisive. Such transmission relies on step-up transformers to increase the voltage levels for transmission and step-down transformers to reduce the voltage to a level suitable for the specialist electrical equipment at the offshore site. ABB remains the world's leading manufacturer of subsea transformers, with many examples powering pumps and compressors that extract oil and gas from reservoirs below the seabed, thus keeping wells productive longer. ABB subsea transformers require specialized design features that enable them to operate at depth, under pressure. This means all disair- and gas-filled voids within the outer casing must be eliminated by immersing components in liquid and a pressure compensating system, to keep the internal pressure close to the outside water pressure, has to be available ? 2.
The high quality insulating oil used has a low expansion coefficient and high compatibility with the other materials and components used in the transformer. Since the transformer is housed in a solid tank that cannot expand, even when hot, the oil is degassed prior to installation.
The heat generated by the transformer during operation has the potential to accelerate chemical reactions, possibly enhancing the corrosive effects of seawater, and, since the transformer is cooled by natural convection, also the potential to attract living organisms to the outer surface of the casing.
These factors necessitate the use of special, high-grade steel for the casing, which must also be able to cope with the high pressures associated with deep-sea locations.
The largest subsea transformers so far are about 4 m tall, 7 m long and 3 m wide, and contain about 14 m3 of insulating oil ? 3. Tubes on the underside of the structure slot over the piles so that the structure stands a few meters above the seabed when properly installed. In fact, since the scope for doing repairs is limited, due to the expense of raising equipment to the surface, ABB has invested a great deal of time and effort to ensure all components are of the highest quality and have undergone rigorous testing.
These stringent tests have ensured that all 20 ABB subsea transformers currently installed are operating reliably and safely and are providing great performance and cost benefits to offshore developments.
A mobile plant, consisting of an electrical system, a subsea cable and a subsea skid, will be transported by ship to the place where the pipeline has frozen.
The subsea skid, which will include a subsea transformer and the electrical connectors required to make contact with the pipeline, will be lowered to the seabed. With the help of a remotely operated vehicle (ROV) the electrical connectors will be attached to the pipeline and the power switched on.


The ship's diesel generator will supply 480 volts and a step-up transformer will be used to raise and regulate the voltage to between 1 kV and 11 kV. Moreover, the field is over 150 km from land, and 50 km from the nearest offshore platform. At these distances and using conventional operational voltages (6.6 kV), most of the power required to keep the compressor motors running on the seafloor would be lost. The solution is one of ABB's most recent subsea transformers, a rugged, powerful unit capable of operating at depths of up to three kilometers.
ABB is manufacturing nine subsea transformers for this project, scheduled for completion and testing in June 2013. Placing a grid connection transformer on the seabed eliminates the need to build a specific transformer platform. Tidal turbine parks and wave-power converter parks could similarly benefit from ABB subsea transformer technology as they become large scale commercialized operations. ABB has already been contacted by developers keen to understand the possibilities of subsea power technologies that relate to their specific applications. This enables electrical power to be transmitted to the site in question at a high voltage and the distribution system to be located close to end consumers. Electrically, SEPDIS is a conventional transmission and distribution system with a limited number of components and functions. Mechanically, and in terms of its subsea capability, it is a very robust and sophisticated system. This increases loading on the cable, as well as on other components feeding the power chain. This means that, in future, subsea shunt reactors will also be needed for subsea transmission and power systems.
As a leading manufacturer of shunt reactors for onshore power and transmission systems, ABB is developing this technology for subsea applications as well. This was delivered to Nyhamna in Norway for testing equipment in the Ormen Lange gas field. From a depth of one kilometer, it will feed power to compressors installed to improve gas production. The Ormen Lange field supplies 20 percent of the UK's natural gas via a 1,200 km long undersea pipeline.



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