Metal oxide surge arresters
September 2012
Electrical Power & Protection
The SBKC range of metal oxide surge arresters from Tridelta is designed to protect transformers, switchgear and plant against atmospheric and switching overvoltages. The surge arresters are available with rated voltages from 6 kV to 288 kV and are suitable for use in solidly earthed systems with nominal voltages of up to 362 kV and frequencies of 16 Hz to 62 Hz.
The fully encapsulated silicone cage-like structure gives the active components high mechanical strength, and the silicone housing is moulded directly onto the ZnO varistors. The line discharge class 3 surge arresters have been tested with a rated short-circuit current of 63 kA and with long duration current impulses of 1000 A for a duration of 2000 μs.
All metallic fittings are manufactured from aluminum alloy and the connections are available in either hot dipped galvanised metal or stainless steel. Optional accessories include spark gap monitors, surge counters and diagnostic devices. The cage design arresters can be installed in a standing or suspended position in transformer substations and as line-side arresters in overhead power lines.
For more information contact Johan van Staden, Surgetek, +27 (0)11 792 1303, [email protected], www.surgetek.co.za
Further reading:
Emissions pressures are not just hot air
Electrical Power & Protection
Dennis Williams, commercial director of AES says that the South African government aims to push towards global standards in emissions, but it might be difficult for our industries to carry the financial burden. This is where AES fits in.
Read more...
ABB achieves zero operational emissions
ABB South Africa
Electrical Power & Protection
ABB’s factory in Oiartzun, Spain, has reached a major sustainability milestone.
Read more...
Energy cannot be destroyed, it can only be transferred
Schneider Electric South Africa
Electrical Power & Protection
Industry produces significant amounts of waste. Unfortunately, a lot of this waste is simply disposed of, usually impacting the environment. What if these byproducts could be transformed into a source of energy?
Read more...
Dual head safety pull switches with expanded cable span
Electrical Power & Protection
Referro Systems has added the latest Dual Head range of Allen-Bradley’s safety pull switches to its portfolio. It is ideal for protecting long stretches of equipment where quick access to a safety pull switch and emergency stop is vital.
Read more...
Producing solar hydrogen without platinum
Electrical Power & Protection
A research team led by Chalmers University of Technology, Sweden, has presented a new way to produce hydrogen gas without the scarce and expensive metal platinum.
Read more...
Energy-efficient perimeter cooling system for small, medium and edge applications
Electrical Power & Protection
Vertiv has enhanced the Vertiv CoolPhase Perimeter PAM air-cooled range with new ratings of cooling systems and Vertiv CoolPhase Condenser.
Read more...
High-quality DC/DC brick-type converters
Vepac Electronics
Electrical Power & Protection
PowerGood’s high-quality DC/DC brick-type converters are engineered for exceptional reliability, making them the ideal power conversion solution for demanding, high-end applications.
Read more...
SF6-free pure-air medium voltage switchgear
Schneider Electric South Africa
Electrical Power & Protection
As South Africa intensifies its move towards cleaner, smarter energy systems, solutions like Schneider Electric’s globally recognised SF6-free GM AirSeT pure-air medium voltage switchgear is taking the country one step closer to achieving its decarbonisation goals.
Read more...
South African businesses can alleviate energy price crisis
Electrical Power & Protection
While grid instability remains a concern, the immediate and most critical driver of South African commercial and industrial investment in renewable energy is the escalating cost of electricity.
Read more...
Real-time modelling is the key to a resilient, bi-directional energy grid
Schneider Electric South Africa
Electrical Power & Protection
Utilities and municipalities are facing a challenge as the country’s legacy power grid, engineered for one-way energy delivery from centralised suppliers to end-users, must rapidly evolve to meet a new paradigm.
Read more...
printer friendly version