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Molded Trefoil Clamps
Trefoil clamps are used for high voltage single core or higher sizes cables where the current rating is high & 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 molded from virgin glassfiber filled material. Sumip Type TRE 28 Trefoil clamp has been tested satisfactorily at CPRI to withstand 50 KA short circuit fault current with spacing between Trefoil clamps kept at one meter distance.
- High mechanical strength
- Center distance between Trefoil clamps can be increased for lower fault level than 50 KA & hence total requirements of clamps can be reduced thereby reduction in cost.
- Long service life as practically not affected by all chemicals, acids and alkalis.
- Design of clamp & good flexural strength gives good grip on cable & accommodates slight deviation in diameter of cable.
- Sumip Trefoil Clamps are supplied with bolts, nuts & washers which are generally MS Zinc passivated but galvanized, SS hardware can be supplied against specific requirement.
- Flame retardency feature can be provided against specific requirement.
- Aluminum Trefoil clamps can also be supplied if required.
| Model No. | Min | Max | CC of Mounting Holes in mm |
| TRE 03 | 16.0 | 19.0 | 110 |
| TRE 04 | 20.0 | 23.0 | 110 |
| TRE 05 | 23.5 | 26.5 | 110 |
| TRE 06 | 34.5 | 37.5 | 110 |
| TRE 08 | 30.0 | 34.0 | 110 |
| TRE 10 | 38.0 | 41.0 | 110 |
| TRE 14 | 42.0 | 44.0 | 110 |
| TRE 16 | 44.0 | 47.5 | 110 |
| TRE 21 | 47.5 | 50.0 | 140 |
| TRE 24 | 50.9 | 54.0 | 140 |
| TRE 28 | 54.1 | 57.2 | 140 |
| TRE 30 | 57.3 | 60.3 | 140 |
| TRE 35 | 60.4 | 63.5 | 180 |
| TRE 37 | 63.6 | 66.5 | 180 |
| TRE 39 | 67.0 | 69.0 | 180 |
| TRE 43 | 69.0 | 73.0 | 180 |
| TRE 50 | 76.0 | 80.0 | 180 |
Sc Series :-
Sizes available from 42mm to 120mm fion cable Diameter
Hardware :-
MS zinc paslivated with optional Hardward available in hot dip galvanized or SS 304 / 316