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[April 18, 2013]
ABB develops switchgear solution for 362-550kV transmission applications
Apr 18, 2013 (Datamonitor via COMTEX) -- ABB, a power and automation technology group, has developed a high voltage switchgear solution for 362-550kV transmission applications.
The new disconnecting circuit breaker (DCB) has an integrated fiber optic current sensor (FOCS) which reportedly simplifies substation design and reduces footprint requirements. It also adds to the intelligence of the device, enabling it to be part of a more flexible, reliable and smarter grid.
The new DCB-FOCS has been deployed in a 420 kV pilot project in Sweden. Conventional air-insulated high voltage switchgear comprises the circuit breaker, disconnector, and current transformer as separate components which require individual installation space.
ABB has now taken this concept a step further by integrating FOCS (a current measuring device) within the DCB itself. This new design has the potential to reduce the overall physical footprint of the substation where it is installed by up to 60 per cent compared with a conventional solution.
"This latest development is yet another milestone in our continued commitment to technology and innovation," said Giandomenico Rivetti, head of ABB's High Voltage products business within the company's Power Products division.
"Integrating the FOCS with the DCB reduces footprint while delivering a 'smart grid' enabled solution that is virtually 'plug and play' and yet flexible enough to accommodate customer needs. This makes it ideally suited for new and upgrade substation applications with the added benefit of enhanced power availability and reliability." The new product has low maintenance needs and is more environmentally friendly and eco-efficient in terms of CO2 emissions and material used for production and insulation. Moreover, the wiring comprises standard Ethernet cable connections, making it both simpler and safer while improving efficiency by cutting electro-thermal and electrical losses. Further, the replacement of multiple CT (Current Transformer) cores with a single FOCS has the dual advantage of better protection and control.
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