ABB Installation Products R2T28M2-N0270 Ranger2 Termination. Type - Outdoor, 28kV, Cable Type - Tape Shield/Wire Shield/…

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How to Install the R2T28M2 Shrink-Fit Silicone Rubber Termination for Tape Shielded Cables

This guide provides step-by-step instructions for installing the R2T28M2 28kV Ranger 2 Shrink-Fit Silicone Rubber Termination on tape shielded cables, including cable preparation, ground braid installation, lug connection, and termination placement. All apparatus must be de-energized during installation to prevent serious injury or fatality.

Estimated time: 1h 30m

1. De-energize and Prepare Cable

   De-energize all apparatus in the work area. Verify that the cable size fits within the insulation range specified in the Termination Selection Chart. Train the cable into position and cut it to the required length for installation. Prepare the cable by removing the jacket, semi-con, and insulation according to the dimensions provided in Table 1, allowing for the depth of the terminal lug and any growth allowance for aluminum lugs. To prevent the tape shield from unrolling, hold down its edge with a single wrap of the supplied copper foil tape.

2. Install Ground Braid

   Carefully wrap one band of mastic around the cable jacket, 1/4 inch (6mm) from the jacket end, using 50% stretch. Position the preformed ground braid with its short tail over the tape shield and the solder block centered over the mastic strip. Secure the ground braid to the cable jacket using vinyl tape and press the solder block firmly into the mastic. Apply a second mastic band over the solder block and the first mastic, maintaining the 1/4 inch (6mm) dimension, and cut it flush without overlap. Wrap two half-lapped layers of vinyl tape around the mastic seal. Wrap the ground braid around the cable tape shield one complete wrap, trim any excess to prevent overlap, and secure it in place with the constant force spring, wrapping the spring in the same direction as the ground braid. Cinch (tighten) the spring after the final winding and secure it with two wraps of vinyl tape. For cables with cloth or paper semi-conductive shields, overwrap the shield with one half-lapped layer of highly stretched semi-conductive rubber tape.

3. Install Terminal Lug or Connector

   Check to ensure the termination assembly will fit over the selected lug. If the lug will not fit through the termination core, clean the insulation and slide the termination onto the cable before installing the lug (do not remove the core at this time). Position the connector or lug and crimp it according to the manufacturer's directions, ensuring not to crimp the last 3/8 inch to 1/2 inch of the connector. After crimping, remove any excess oxide inhibitor and all sharp crimp flashings and edges.

4. Clean Cable Insulation and Lug Barrel

   Wipe the cable insulation with an approved solvent, taking care not to allow the solvent to touch the semi-con insulation shield. If abrasive cleaning is necessary, use only aluminum oxide abrasive (grit 120 or finer) on the insulation only, and do not use it on the semi-con insulation shield. Be careful not to reduce the cable insulation diameter below the limits allowed by the kit.

5. Install Termination Body and Complete Seals

   Create a track-resistant moisture seal between the termination insulator and the lug/connector using the gray silicone rubber electrical tape from the kit. Wrap a band of silicone tape around the base of the terminal lug; if the barrel diameter is equal to or greater than the cable primary insulation, do not exceed 2 layers. If the barrel diameter is smaller, use the tape strip to build up the band to equal the insulation diameter. Cover the edge of the semi-con insulation shield with a liberal coating of silicone grease to fill the step at the semi-con cut-off. For lower terminations with a fold-down skirt, pull the loose end of the removable core through the top of the termination until the core is flush with the bottom. Slide the termination body onto the cable, aligning it with the forward edge of the mastic seal. Carefully begin to remove the core by unwinding it counter-clockwise, starting with the loose end, ensuring the termination body, not the core, remains butted against the leading edge of the mastic seal. Continue to remove the core without pushing or pulling on the termination assembly. Apply a thin film of silicone lubricant to the skirt and mastic seal area, but do not lubricate the skirt tabs. Carefully fold down the skirt over the mastic seal. Complete the lug area moisture seal using the remaining gray silicone rubber electrical tape, overlapping the termination insulator by approximately 1 inch and extending the tape wrapping over a non-crimped region of the lug/connector barrel with a half-lap configuration. Connect the ground braid to the system ground. Finally, confirm that the High-K step does not exceed 1.5 inches.

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