Trefoil Cable Clamp

Trefoil clamps are used for high voltage single core cables where the current rating is high and 3 core cables are not available. Sumip Trefoil clamps are used for laying single core cables in Trefoil touching formation which helps to maintain magnetic symmetry thereby avoiding electromagnetic heating and loss of current. Sumip Trefoil clamps have been moulded from glass fibre filled material.

Short Circuits and Short Circuit Testing 

The forces experienced by a cleat during a short circuit are a function of short circuit current, cleat spacing and the distance between the cable centers (in the case of trefoil arrangements, this is the cable diameter). 

The Sumip cable cleat has undergone extensive, rigorous short circuit testing and has been approved and certified to withstand 'Short-Time and Peak Withstand Test Current of up to 50 KA RMS, 125KA peak at 1000 mm spacing for 1 second, tested at Electrical Research and Development Association (ERDA). Such results make the Sumip 's cleats as one of the strongest cleats in the market. 

• Sumip can also provide clamps which are tested at 50 KA RMS, 125KA peak at 1000 mm spacing for 3 seconds. 
• Sumip can also provide specialized clamps required in POWERGRID, WBETCL etc. with Non Magnetic Hardware & Neoprene Rubber Lining as per IS 11149-1987