3M QS1000 Joint & 3M QTIII Termination – 11kV Triplex Cold Shrink Joints & Terminations
Published 26 Mar 2021
Images Courtesy of: Danny Williamson (LV HV Cable Jointer).
Danny is pictured below, jointing and terminating 11kV Triplex cables into medium voltage Schneider Ringmaster RN2c (RMU).
Schneider Ringmaster is a compact highly reliable solution for both indoor and outdoor MV distribution networks up to 13.8kV.
The 11kV joints and terminations were completed using Northern Power Grid (NPG) specification 3M QS1000 and 3M QTIII Cold Shrink kits – terminations include Sicame mechanical shearbolt cable lugs. 
Alroc cable strippers are pictured removing the red XLPE cable outer sheath which is the stage before the HV jointer must bend back the copper screen wires and remove the bonded semi-con layer.
Danny is also Pfisterer Connex size 1,2,3 3/S 3XL trained and authorised for live LV cable jointing on GTC networks and we look forward to featuring more examples of his work soon.
âž¡ Should you wish to feature and showcase your cable jointing skills on our Photoblog simply submit images with accompanying description to [email protected].
Good Housekeeping, Best Cable JointingÂ
“Some people tend to forget to treat all cables with same respect, whether they’re 11kV or 400kV. Any cable jointing area should be clean, neat and tidy – cable jointing tools handy and kept clean. Cables off the floor, away from dirt, dust etc. Danny Williamson has done that, he even has a tarpaulin over his head, sometimes you can only cook with what you’ve got, he has made an effort which is absolutely commendable,” commends Andrew Brezovszky.
3M QS1000 Cable Joint – 11kV. Cold Shrink tubes parked up the cable in the trench as the jointer uses connector holding tools to steady the mechanical connector as the shear-off bolts are installed. Copper wire screens secured with constant force springs are over-wrapped with 3M tape.
NPG specification Tapetile Cable Tile awaits roll-out to provide effective protection to the underground 11kV power cables.
Jointing Tools. Perfect 11kV cable preparation using appropriate cable jointing tools.
Cold Shrinking. The inner spiral from the 3M QTIII cable termination is unwound and the Cold Shrink tube with in-built stress control collapses onto the 11kV cable. Cold shrink jointing technology has virtually replaced heat-shrink material on UK DNO 11kV-33kV networks.
Connecting the 3M QTIII cable terminations onto the 11kV RMU bushings.
3M QTIII Cold Shrink Terminations Complete – 3M 92EE717 type universal bushing boots insulate the termination and protect against flashover. Copper wire screen entwined, identified with PVC insulation tape and bonded to earth stud. Heat shrink cable glands used to provide mechanical retention to the 11kV cables.
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