THREE-PIECE JOINT 145KV

TE Connectivity’s (TE) Raychem EHVS high‑voltage three‑piece joints with heat‑shrink re‑jacketing (types EHVS‑145TWI and EHVS‑145TWS) are designed for polymeric‑insulated power cables operating at voltages up to 145 kV. The joint system is suitable for both in‑line and shield‑break applications and is compatible with a wide range of cable constructions independent of the cable manufacturer. Installation can be carried out by trained personnel using conventional tools, featuring short cut‑back dimensions and no requirement for parking on the cable semiconductive layer. The joints are type‑tested and routine‑tested in accordance with IEC 60840, including Annex G water‑immersion testing.

The joint consists of a prefabricated three‑piece silicone rubber body with integrated geometric stress control and interchangeable adaptors, allowing size transitions and adaptation to different conductor designs. Electrical connection is achieved using a mechanical shear‑off bolt connector suitable for aluminium and copper conductors. Environmental sealing and mechanical protection are provided by a heat‑shrinkable polymeric sleeve with oil‑resistant sealant and an aluminium‑lined wraparound layer.

Approximate joint length: 1950 mm

• Length of installed joint body: approx. 610 mm
• Approximate joint weight: 45 kg
• Applicable cable insulation diameter range: 43–112 mm
• Maximum conductor cross‑section (Cu/Al): approx. 2500 mm²
• Permissible dielectric stress: up to 4 kV/mm (at cable insulation screen)
• Rated short‑circuit current (sheath): 45 kA / 1 s
• Installation temperature range: 0 °C to +40 °C
• Storage temperature range: 0 °C to +40 °C