A Lesson in Transition Jointing Cables by A Competent Jointer

Published 20 Mar 2020

A Lesson in Transition Jointing Cables by A Competent Jointer

HEATSHRINK TRANSITION JOINT 6.35/11(12kV)

Featured Jointer: Stuart Duncan from BELAC

Shrink Polymer Systems heatshrink cable joints and terminations suit all types of standard and non-standard MV-HV Electrical Power Cables (single or multi-core) with or without armour or lead sheaths up to 33/36kV – zero halogen and fire resistant cable joints are also available.

➡ Thorne & Derrick provide competitive prices and fast delivery from stock for the complete range of Shrink Polymer Systems heat shrink cable joints and terminations.

Below shows the installation of a heatshrink transition joint by Stuart Duncan from Belac.

Stuart Duncan at Belac commented, “The cable joints were spot on. Quite enjoyed doing them to be honest. It’s a bit different from the normal so it was a nice change from the usual cold shrink. Jointing instructions were clear and well laid out. Some cable joint kits can get a bit confusing and with irrelevant info in them. I did notice that each separate component was clearly labelled with a name matching the instruction which was a nice touch and helped a lot in the trench. Some kits we use have just numbers and some kits are not labelled at all. Everything fitted well and I was happy with the way everything went together. Good joints, would definitely use them again.”

Picture 1: Stress relief mastic tape had been applied on the step down from lead to paper insulation to eliminate the air void and went on to fit the clear oil barrier sleeve (PILC side).

Picture 2: The semi conductive sleeve and stress control tube have been shrunk into place (PILC side) using a jointer gas torch kit.

Picture 3: Semi-conductive screen has been treated on the XLPE side as well as the application of the yellow stress relief mastic to assist with removing any potentially harmful amounts of electrical stresses. The cable MUST be thoroughly cleaned using a solvent, prior to applying the yellow stress relief mastic. Stress relief mastic should be applied under tension, to ensure void free application.

Picture 4: Connector is in place. Important to note that the connector insulation tubes and outer heatshrink sleeve have been parked down the core before connecting the two conductors together.

Picture 5: Stress relief mastic tape had been applied over the connector and onto the insulation at both sides to eliminate any air voids in the medium voltage cable joint.

Picture 6: CWS and earth braids connecting from the lead are joined. Copper mesh is then wrapped for the length of the cable joint.

Picture 7: Outer adhesive heat shrink sleeves are positioned and fitted to provide moisture and mechanical protection to the 11kV joint. 

Thorne & Derrick

Specialist Electrical Distributor

Established since 1985, Thorne & Derrick International based in the UK distribute the most extensive range of LV, MV & HV Cable Jointing, Terminating, Pulling & Installation Equipment – contact us today for a competitive quotation.

Key Products : MV Joints & Terminations, Access Chambers, Cable Cleats, Duct Seals, Cable Transits, Jointing Tools, Feeder Pillars, Cable Duct, Earthing & Lightning Protection, Electrical Safety, Cable Glands, Arc Flash Clothing Protection & Fusegear.

Distributors for : 3M, Pfisterer CONNEX, Nexans Euromold, Elastimold, Catu, Roxtec, Emtelle, Centriforce, Lucy Zodion, Alroc, Cembre, Prysmian, Ellis Patents, ABB & Furse.

LV, MV & HV JOINTING, EARTHING, SUBSTATION & ELECTRICAL EQPT

Thorne & Derrick International are specialist distributors of LV, MV & HV Cable Installation, Jointing, Duct Sealing, Substation & Electrical Equipment – servicing UK and global businesses involved in cable installations, cable jointing, substation, overhead line and electrical construction at LV, 11kV, 33kV and EHV.

Further Reading

• Heatshrink Transition Joint 6.35 11(12kV) – SPJ 12PX-1C Size: 473.85 KB