Pre Moulded EHV Joints

Category: Raychem RPG Tag: Pre Moulded EHV Joints

Specifications

Single Piece Joint 72/145 kV/245 kV
Rated kV	36/66 (72)	76/132 (145)	127/220 (245)
Diameter over insulation	37.86 – 75.20 mm	37.86-96.80 mm	60.70-128.25 mm
Diameter over sheath	≤ 120 mm	≤ 140 mm	≤ 160 mm
Cable screen types	Cu-wires w/o laminated foil, lead sheath, corrugated metal sheath, Cu-tape (other types and combinations on request)	Cu-wires w/o laminated foil, lead sheath, corrugated metal sheath, Cu-tape (other types and combinations on request)	Corrugated aluminium sheath/Lead sheath/Cu wire. etc.
Max. Cross section (Cu / Al)	≤ 1200 mm²	Approx. 1600 mm²	≤ 2500 mm²
Conductor connection	Mechanical (shear head bolts)	Mechanical (shear head bolts)	Mechanical (shear head bolts)
Material of connection bolt	Aluminum / Copper	Aluminum / Copper	Aluminum / Copper
Max. permissible dielectric stress	4 kV/mm (at insulation screen of cable)	4 kV/mm (at insulation screen of cable)	4 kV/mm (at insulation screen of cable)
Outer protection	Reinforced composite laminate wrap around with an integral moisture barrier/Copper Casing/FRP box with PU compound	Reinforced composite laminate wrap around with an integral moisture barrier/Copper Casing/FRP box with PU compound	Reinforced composite laminate wrap around with an integral moisture barrier/Copper Casing/FRP box with PU compound
Method of stress control	Geometric	Geometric	Geometric
Material main body	Silicone rubber	Silicone rubber	Silicone rubber
Installation temperature	0 °C – +40 °C	0 °C – +40 °C	0 °C – +40 °C
Operation temperature	-55 °C – +50 °C	-55 °C – +50 °C	-55 °C – +50 °C
Storage temperature	0 °C – +40 °C	0 °C – +40 °C	0 °C – +40 °C

Three-Piece 145 kV Joint
Diameter over insulation	43 – 84 mm
Diameter over sheath	105 mm
Cable screen types	Cu-wires w/o laminated foil, lead sheath, corrugated metal sheath, Cu-tape (other types and combinations on request)
Max. Cross section (Cu / Al)	Approx. 3000 mm²
Conductor connection	Mechanical (shear head bolts)
Material of connection bolt	Aluminium / copper
Max. permissible dielectric stress	4 kV/mm (at insulation screen of cable)
Outer protection	Reinforced composite laminate wrap around with an integral moisture barrier/Copper Casing/FRP box with PU compound
Method of stress control	Geometric
Material main body	Silicone rubber
Installation temperature	0 °C – +40 °C
Operation temperature	-55 °C – +50 °C
Storage temperature	0 °C – +40 °C

Technical Information

Single Piece Joint 72/145 kV/245 kV
Relevant standard		IEC 60840	IEC 60840	IEC 62067
Rated voltage U0/U (Um)	kV	36/66 (72)	76/132 (145)	127/220 (245)
Rated frequency	Hz	50	50	50
Lightening impulse voltage 1,2/50μs	kV	350	650	1050
AC Voltage withstand test (15/30 min)	kV	90	190	254/318
Partial discharge 1.5 Uo kV	pC	≤5	≤5	≤5
Rated current	A	as per cable	as per cable	as per cable
Rated short-circuit current (conductor) 1s	kA	as per cable	as per cable	as per cable
Rated short circuit current (sheath) 1s	kA	As per cable	As per cable	As per cable
DC Voltage test between metallic sheath/screen and earthed exterior	kV	25	25	25

Three-Piece 145 kV Joint
Relevant standard		IEC 60840
Rated Voltage Uo/U (Um)	kV	76/132 (145)
Rated frequency	Hz	50
Lightening impulse voltage 1,2/50µs	kV	650
AC Voltage withstand test (30 min)	kV	190
DC Voltage withstand (15 min)	kV	315
Rated current	kA	as per cable
Rated short-circuit current (conductor)	kA	as per cable
Rated short-circuit current (sheath) 1s	kA	50
DC Voltage test between metallic sheath/screen and earthed exterior	kV	25

Description
Reviews (0)

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.

Single Piece – Premoulded one-piece joint body upto 245 kV
Torque-controlled connector
Joint fits on all polymeric cable constructions
Proven shield continuity concept
Factory tested silicone rubber body
Special silicone rubber provides perfect compression force for optimized electrical performance
Simple assembly
Choice of outer sealing and protection system
No tension set of joint body
Moulded/Painted outer conductive screen
Geometrical electrical stress control by moulded conductive deflectors
Type tested according to IEC 60840, IEC 62067 standards
Three Piece – Premoulded three-piece joint design upto 145 kV
Torque-controlled connector
Joint fits on all polymeric cable constructions
Proven shield continuity concept
Factory tested silicone rubber body
Special silicone rubber provides perfect compression force for optimized electrical performance
Short cut-back dimensions, cable size transition possible
No special tools required for installation
No tension set of joint body
Moulded outer conductive screen
Geometrical electrical stress control by moulded conductive deflectors
Type Tested as per IEC: 60840