Pre moulded design of Joints for voltages upto 245 kV. Available in Single/One piece design upto 245 kV and Three piece design for 145 kV. The silicone rubber joint body with integrated geometrical stress control, provides proven electrical functions. Joint components combine electrical performance, stress control and moisture sealing to provide important functions required for high voltage equipment.
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Single Piece Joint 72/145 kV/245 kV
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Rated kV
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36/66 (72)
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76/132 (145)
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127/220 (245)
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Diameter over insulation
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37.86 - 75.20 mm
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37.86-96.80 mm
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60.70-128.25 mm
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Diameter over sheath
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≤120mm
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≤140 mm
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≤160 mm
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Cable screen type
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Cu-wires w/o laminated foil, lead sheath, corrugated metal sheath, Cu-tape (other types and combinations on request)
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Cu-wires w/o laminated foil, lead sheath, corrugated metal sheath, Cu-tape (other types and combinations on request)
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Corrugated aluminium sheath/Lead sheath/Cu wire. etc.
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Cable Cross section (Al/Cu)
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≤1200 mm²
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≤1600 mm²
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≤2500 mm²
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Conductor connection
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Mechanical (shear head bolts)
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Mechanical (shear head bolts)
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Mechanical (shear head bolts)
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Material of connection bolt
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Aluminium/Copper
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Aluminium/Copper
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Aluminium/Copper
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Max. permissible dielectric stress
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4 kV/mm (at insulation screen of cable)
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4 kV/mm (at insulation screen of cable)
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4 kV/mm (at insulation screen of cable)
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Outer protection
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Reinforced composite laminate wrap around with an integral moisture barrier/Copper Casing/FRP box with PU compound
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Reinforced composite laminate wrap around with an integral moisture barrier/Copper Casing/FRP box with PU compound
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Reinforced composite laminate wrap around with an integral moisture barrier/Copper Casing/FRP box with PU compound
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Method of stress control
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Geometric
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Geometric
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Geometric
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Material main body
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Silicone rubber
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Silicone rubber
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Silicone rubber
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Installation temperature
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0 °C - +40 °C
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0 °C - +40 °C
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0 °C - +40 °C
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Operation temperature
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-55 °C - +55 °C
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-55 °C - +55 °C
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-55 °C - +55 °C
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Storage temperature
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0 °C - +40 °C
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0 °C - +40 °C
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0 °C - +40 °C
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Three-Piece 145 kV Joint
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Diameter over insulation
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43 – 84 mm
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Diameter over sheath
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105 mm
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Cable screen type
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Cu-wires w/o laminated foil, lead sheath, corrugated metal sheath, Cu-tape (other types and combinations on request)
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Cable Cross section (Al/Cu)
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Approx. 3000 mm²
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Conductor connection
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Mechanical (shear head bolts)
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Mechanical (shear head bolts)
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Aluminium/Copper
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Max. permissible dielectric stress
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4 kV/mm (at insulation screen of cable)
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Outer protection
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Reinforced composite laminate wrap around with an integral moisture barrier/Copper Casing/FRP box with PU compound
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Method of stress control
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Geometric
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Material main body
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Silicone rubber
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Installation temperature
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0 °C - +40 °C
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Operation temperature
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-55 °C - +55 °C
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Storage temperature
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0 °C - +40 °C
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Single Piece Joint 72/145 kV/245 kV
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Relevant Standard
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IEC 60840
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IEC 60840
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IEC 62067
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Rated voltage Uo/U (Um)
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kV
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36/66 (72.5)
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76/132 (145)
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127/220 (245)
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Rated frequency
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Hz
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50
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50
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50
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Lightening impulse voltage 1.2/50µs
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kVp
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350
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650
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1050
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Power frequency voltage withstand dry (15/30 min)
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kV
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90
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190
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254/318
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Partial Discharge 1.5Uo (kV)
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pC
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≤5
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≤5
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≤5
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Rated Current
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kA
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as per cable
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as per cable
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as per cable
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Rated Short Circuit Current (conductor) 1s
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kA
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as per cable
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as per cable
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as per cable
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Rated Short Circuit Current (sheath) 1s
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kA
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as per cable
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as per cable
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as per cable
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Creepage distance (min.)
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mm
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2250
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4500
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7595
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Flash-over distance
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mm
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740
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1340
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2320
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Pollution level (IEC 60137; 1995, VDE 0674 Teil5)
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IV
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IV
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IV
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Withstand voltage of support insulators (AC/DC)
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kV
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10/20
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10/20
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10/20
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Three-Piece 145 kV Joint
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Relevant Standard
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IEC 60840
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Rated voltage Uo/U (Um)
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kV
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76/132 (145)
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Rated frequency
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Hz
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50
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Lightening impulse voltage 1.2/50µs
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kV
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650
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AC Voltage withstand test (15/30 min)
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kV
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190
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DC Voltage withstand (15 min)
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kV
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315
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Rated Current
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A
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as per cable
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Rated Short Circuit Current (conductor) 1s
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kA
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as per cable
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Rated Short Circuit Current (sheath) 1s
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kA
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50
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DC Voltage test between metallic sheath/screen and earthed exterior
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kV
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25
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