ZMS - High Voltage - 35KV-220KV Underground XLPE Insulated Power Cable
Like other power cables, High voltage XLPE cables typically consist of one or three conductors, insulation, and a sheath structure. High Voltage Underground Wire Cables differ from low voltage cables in that they also have an inner layer within the insulation sheath to control the electric field around the conductors. For circuits running at relatively high voltages between conductors, the conductor sheaths can surround each insulated conductor. In this way, the electrical stresses on the cable insulation can be balanced and unnecessary losses in the cable can be reduced.
IEC 60840, IEC 60287, IEC 62067, ICEA S-108-720 and AEIC CS9.
Voltage: 35kv-220kv
Conductor: Class 2 copper or aluminum conductor, compacted or segment strand Milliken to BS EN 60228 (previously BS 6360)
Conductor Screen: Extruded semi-conductive XLPE (Cross-Linked Polyethylene)
Cross-Section: 150-800mm2
Insulation: XLPE(Cross-Linked Polyethylene)
Insulation Screen: Semi-conductive XLPE (Cross-Linked Polyethylene)
Separator: Water swellable semi-conductive tape
Screen: Copper wire screen, with a counter helix of copper tape
Separator: Water swellable tape
Sheath: HDPE (High-Density Polyethylene)(To be specified at the time of order. Other options available)
Maximum Conductor Temperature In Service: (Operating temperature-continuous operation) +90 °C
Short Circuit Temperature: +250 °C
Operating Temperature: -30 °C to 90 °C
Major technical parameters (220kv and below cable)
Partial Discharge Test: No detectable discharge exceeding the declared sensitivity (5 pC or better) at 1.5 U0.
Power Frequency Voltage Test: No breakdown of the insulation or flashover at 2.5U0 for 30 min.
Non-metal Sheath DC Voltage Test: No breakdown at DC voltage 25kV for 1 min.
DC Resistance Measurement of Copper Wire Screen at 20?: The measured value shall comply with the specification of IEC 60228:2004.