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Switchgear (and circuit breakers) and transformers are critical components in electrical distribution systems and their operation significantly affects the overall performance of the system. This course will discuss the application, installation, maintenance and testing issues relating to medium and high voltage switchgear, circuit breakers and transformers. Low voltage switchgear will also be covered and you will receive a thorough grounding in switchgear theory and standards. You will gain a solid understanding of the issues associated with the proper application, installation and maintenance of these critical items of equipment with an overriding emphasis on safety. The emphasis is on medium voltage (referred today as high voltage) switchgear which represents most of the switchgear installed on electrical distribution systems. The focus is on air blast, oil, SF6 and vacuum circuit breakers. Case studies covering the main manufacturers' equipment will illustrate the important practical principles. Other power system protection components will be discussed as well to ensure that switchgear is understood in the correct context. Installation of high voltage distribution and transmission equipment has increased significantly over the years due to ongoing global demand for power. As a result, the need to ensure reliability of operation of power systems is paramount. Power transformers are among the most important and most expensive components of power systems. Their failure can impose extraordinarily high costs on plants, factories and utilities of all descriptions. It is critical that all personnel operating and working with such equipment have a sound knowledge of their operational requirements and maintenance. This practical course provides knowledge on both the theory and operation of Power Transformers. The course will develop and enhance an understanding of what is involved in the maintenance of these essential components of the power systems, through the tips and tricks learnt and developed by some of the world's pre-eminent electrical engineers.
Single line diagrams
Active and passive network components
Circuit breaker utilisation
Alternative forms of MV switchgear – ring main units and load breaking/fault making switches
HV fuses in combination with, and as alternatives to circuit breakers
Auto-reclosers and auto-reclose operation
Principles of current interruption
Plain break circuit breakers
Bulk and small oil volume circuit breakers
Turbulator (explosion pot)
Transfer earth circuit breakers
Air break and air blast switchgear
SF6 and vacuum
Switchgear in association with isconnectors
Fixed and withdraw-able designs
Factors affecting switchgear selection
Switchgear ratings - highest system and impulse withstand voltages, load and short circuit currents
Simple and complex protection systems
Switchgear ancillaries, measurement CTs, VTs and relays
Indoor and outdoor operation
Substation and switch room layouts and design
SHORT CIRCUIT TESTING
Symmetrical and asymmetrical breaking
Make and break operations
Understanding test oscillograms
Case study - Specification for a 132 KV Switchboard
General safety precautions and the use of personal protective equipment
Principles of safety rules
Principles of personal authorisation
Operative training for safe operation of switchgear
Isolation in a circuit breaker context
Operational and safety locking, caution and danger notices
Work safety in a substation environment
Individual study tasks and presentation - safety policies in my company and how they might be improved
- Sprecher and Schuh
ASSETS MANAGEMENT IN A SWITCHGEAR CONTEXT
Principles of time and condition based asset management
Asset management systems
Switchgear inspection methodologies
Partial discharge measurement and survey
Mechanisms of deterioration
Principles of circuit breaker maintenance
Maintaining oil circuit breakers
Contact maintenance and contact wipe
Maintaining vacuum circuit breakers
Maintaining SF6 circuit breakers
SOPs and DINs
Switchgear defects and defect control Systems
Construction (shell type and core type)
Classification and type in relation to insulation, windings, core, cooling systems, voltage level, sizing, tank and breathing action
POWER TRANSFORMERS AND SAFETY
How to install, operate and work with high voltage power transformers safely
Earthing of HV transformers
Electrical values and their definition in a power transformer - voltage, current, number of turns, impedance and their interrelation
OPERATION OF POWER TRANSFORMERS IN A POWER SYSTEM
Thermal performance, loading, paralleling, tap-changing, connections and vector groups
Protective relaying (differential, over-current and earth fault)
Buchholz relay and pressure relief relay
Thermal devices and instruments (oil temperature alarm and trip, winding temperature alarm and trip)
Oil contents: water, acidity and dissolved gas
Oil tests: dielectric breakdown, moisture, resistivity, interfacial tension, specific gravity, power factor and furan analysis
Recovery voltage measurement test
- Power factor tests (insulation, oil, and bushings)
- Single phase excitation current test
- Transformer turns ratio test
- Insulation resistance test
- Dielectric absorption test
- Polarisation index test
- Step voltage test
- Hi-pot test
PREVENTATIVE MAINTENANCE ON POWER TRANSFORMERS
Techniques to improve life expectancy
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What are the fees for my country?
The Engineering Institute of Technology (EIT) provides distance education to students located almost anywhere in the world – it is one of the very few truly global training institutes. Course fees are paid in a currency that is determined by the student’s location. A full list of fees in a currency appropriate for every country would be complex to navigate and, with today’s exchange rate fluctuations, difficult to maintain. Instead we aim to give you a rapid response regarding fees that is customised to your individual circumstances.
We understand that cost is a major consideration before a student commences study. For a rapid reply to your enquiry regarding courses fees and payment options, please enquire via the below button and we will respond within 1 business day.
Please contact us with your location for certificate fees in the relevant currency. Certificate fees include all live webinars with a professional instructor, 4 technical manuals (as searchable eBooks), course materials, software, postage, assignments and ongoing support. All you need to participate is an internet connection, computer and headset. We have group discounts available for our 3 month certificates.
Three payment options are available for the Advanced Diploma courses;
Pay total amount upfront to receive a 5% reduction in fees.
Pay in 6 equal instalments over 18 months. First payment at least two weeks before the course starts, then the remaining five every 3 months. Payment dates will be set ahead of time and provided at the start of the course. You would receive the 30 technical reference eBooks in batches over the duration of the course.
Pay in even installments for 18 months. First payment at least two weeks before the course starts, then one on the same date every month for the remaining period. This option incurs a 2% administration fee. You would receive the 30 technical reference eBooks in batches over the duration of the course.
For a rapid reply to your enquiry regarding courses fees and payment options, please contact us with your name, email address, course title(s), and location using the form below, and we will respond within 1 business day.
There is scarcely an aspect of modern life that isn’t dependent on electrical energy. It is used in such varied activities as cooling, heating, transport, manufacturing, production, communications, minerals processing and water transfer. Engineers and technicians with an electrical diploma find employment in fields as diverse as generation, transmission, distribution and the eventual application of electrical energy in machinery. Due to the challenges of climate change there is also a vital interest in the use and storage of renewable and sustainable energy. The demand for well trained electrical professionals is assured with rapid expansion of the electricity supply in the developing world, the addition of the yet-to-be-constructed smart grid, and our growing dependency upon electricity supply of high integrity.
Electrical engineering skills and knowledge are also critical in a wide range of industries ranging from oil and gas, water utilities, process plants, mining, pharmaceuticals, manufacturing and defence. The EIT provide electrical engineering courses online for engineers and technicians of all levels and from all types of industry, be it mining, oil and gas or instrumentation. The Advanced Diploma of Electrical Engineering covers a large range of topics and is suited to anyone needing an intensive and practical look at all facets of electrical engineering.
Key subjects in the EIT School of Electrical Engineering include: power generation, transmission, distribution, rotating machinery, power electronics, earthing and safety regulations, electrical documentation and drawings, ac and dc machines, circuit breakers, transformers, energy efficiency, earthing and lightning, power systems protection, dc and ac emergency power supplies, electrical wiring regulations, high voltage supplies and power quality.
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