CADWELD® High Voltage Cable Conductor Connections
ERICO has provided the CADWELD range of exothermic welding solutions to numerous cable manufacturers and installers around the world over many decades.
CADWELD high voltage cable conductor connections uses a specially developed aluminum alloy that makes it perfect for high voltage use. Tested and certified as meeting the requirements of IEC1238 by such companies as Electricity de France.
- Permanent molecular bond that does not loosen or deteriorate, providing a continual optimal electrical path
- Connections on large cross-section aluminum cables are more cost-effective and result in better electrical joints than other methods
- CADWELD range uses a specially developed aluminum alloy that makes it perfect for high voltage use
- Tested and certified as meeting the requirements of IEC1238 by such companies as Electricity de France
- Also available for copper-copper connections
- For both aluminum HV cables and large cross-section copper cables
- Can be used for underground high-voltage cables not under tensile load
The CADWELD process is a method of making welded electrical connections in which no outside source of heat or power is required. For aluminum cable connections, powdered metals (tin oxide and aluminum) are dumped into a lid crucible section of a graphite mold and ignited by using a flint ignitor. The exothermic reaction that takes place is the reduction of tin oxide by aluminum. This reaction produces a superheated mixture of aluminum and tin that flows onto the conductors and causes them to be melted and then fused into a solid homogenous mass. After re-insulating the cable, the resulting connection will have a current-carrying capacity equal to or greater than the conductors being joined and the connection will not loosen, corrode or increase in resistance.