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Arkasil termination with composite type insulator is used for cable line joints with other elements of power-supply systems. Termination MKB 252 is used for outdoor and indoor installation, for XLPE cables 127/220 kV with the conductor cross section up to 2500 mm2.
Basic components
Insulator:
• composite type insulator with glass fiber reinforced epoxy resin tube and silicone rubber sheds
• sheds color–light gray
• top and bottom flanges glued and sealed to the composite insulator
Cable end:
• pre-moulded and factory-tested silicon stress cone
• cable end
• base plate
• branch pipe with flange
• support insulators
• seals and fixing materials
• unpressurised synthetic oil as an insulating compound
• optic fiber outlet
Area of application
Type МKB 252
Phase voltage kV 127
Line voltage kV 220
Maximum system voltage kV 252
Cable conductor cross
section range mm2 400÷2500
Maximum cable sheath
diameter mm 150
Maximum cable insulation
diameter mm 115
Technical data
Electrical parameters:
AC voltage withstand test 318 kV for 30 min
Partial discharges <5 pC at 190 kV
Impulse voltage
(10+/10- impulses) 1050 kV
Climatic characteristics:
Temperature -500C / +450C
Nominal operating current:
Rated operational current limited by cable specification
Short circuit current limited by cable specification
Creepage distance length mm 6190, 7636, 8058,8903, 9959, 10382
Pollution level in accordance
with IEC 60137; II,III, IV
GOST 9920-89
Stress cone routine tests for MKB 252:
AC voltage withstand test 318 kV for 30 min
Partial discharges <5pC at 190 kV
Cable sheath test voltage:
AC voltage 10 kV
DC voltage 20 kV
Mechanical characteristics:
Maximum allowed inclination
angle 30° (45°)
Approximate weight, kg 350
Maximum allowed force on
top connector, Н 5000
Type tests according to IEC 62067.