Anisur Rahman, MIEAust, MIPENZ, MIEEE, MIEB Senior Protection Engineer, Distribution Automation, ABB Australia Pty Limited
Wednesday, the 20th July 2016, 6.00pm to 7.30pm at Engineers Australia on Bourke Street
Abstract: The occurrence of an arc fault, the most serious fault within a switchgear system, is mostly associated with extremely high thermal and mechanical stresses in the area concerned. Power system operation fault statistics reveal that a vast majority of the switchgear arc faults are caused by incorrect human actions or by aging network equipment. Both of these causes are unavoidable to some extent. It is well accepted that by investing in protective equipment such as arc fault protection, the safety, and security of the switchgear system can be enhanced. Time is a critical parameter in reducing the effects of arc faults, as the arc incident energy rapidly increases by time. An arc fault lasting more than 200 ms may cause severe damage to the installation. If the arc flashes for less than 100 ms the damage is often limited. If the arc is extinguished in less than 4 ms the damage will be insignificant. To minimise the operation time, different arc detection technologies are evolved such that highspeed outputs are incorporated in the IEDs and the benefit of using IEC61850 GOOSE messaging is being used to transfer light signals between inter IEDs. Although the main circuit breaker speed is still under challenge. Various arc protection schemes have been used to protect MV switchgear for a long time. Although the principle is simple and easy to implement, the products available in the market are sometimes complex, expensive and do not provide complete solutions. In this session, different arc protection systems are discussed highlighting the benefits and shortfalls of each system and finally discuss the world’s fastest Arc Protection System with Ultra-Fast Earthing Switch (UFES). It is a new, active arc fault protection system based on the know-how gained from decades of experience with the ABB vacuum interrupter and IS-limiter technology.
The system is a combination of devices consisting of an electronic device and the corresponding primary switching elements which initiate a 3-phase short-circuit to earth in the event of a fault. The extremely short switching time of the primary switching element, less than 1.5 ms, in conjunction with the rapid and reliable detection of the fault, ensures that an arc fault is extinguished almost immediately after it arises. With a total extinguishing time of less than 4 ms after detection, an active protection concept with the Ultra-Fast Earthing Switch enables switchgear installations to achieve a highest possible level of protection for persons and equipment.
Biography of the presenter: Anisur Rahman is a Senior Protection Engineer at ABB Australia Pty Ltd and has been working with Distribution Automation products and solutions. He has presented many technical papers in different forums such as Energy Australia, Australian Protection Seminar and various technology events and road shows arranged by ABB Australia. His favourite areas are new technologies like ultra-fast earth switches, smart grids, wireless networks, high-speed auto-transfer system, low-cost load shedding management system and so on. He has 15 years of experience as an electrical maintenance engineer and over 10 years’ experience in Protection and Control Systems design, including load flow analysis, fault level calculation, primary and secondary equipment selection, protection relay configuration & coordination, testing & commissioning of protection and communication systems. In 1984, he graduated in Electrical & Electronics Engineering from Bangladesh University of Engineering and Technology (BUET) and joined with Bangladesh Power Development Board, working as Electrical Maintenance Engineer in different power stations. In 2000, he migrated to New Zealand and completed Bachelor of Science in Computer Science from the University of Auckland and worked with them as a demonstrator. In 2005, he moved to Australia and joined with AREVA as a design engineer and in 2007, he moved to ABB as a protection engineer.
Registration: Members and visitors are welcome, RSVP at https://www.eventbrite.com.au/e/technical-seminar-arc-management-systems-ultra-fast-earthingswitches-tickets-26095362933
Date and Time: Wednesday, the 20th July 2016, 6.00 pm (some light refreshment is served at 5.30 pm). Duration is approximately one hour, followed by question time. Venue: Engineers Australia, Level 31, 600 Bourke Street Melbourne VIC 3000. Further enquiries about this event, please contact us at firstname.lastname@example.org.