Riyadh Cables Group High & Extra High Voltage Cables (HV & EHV)
Riyadh Cables Group offers a comprehensive range of High Voltage (HV) and Extra High Voltage (EHV) cables, engineered to meet the rigorous demands of modern power transmission systems. These cables are designed in accordance with international standards, ensuring optimal performance and reliability for both domestic and international markets.
Design and Construction
The HV & EHV cables are typically single-core and constructed with the following components:
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Conductor: Copper (with aluminum as an optional alternative)
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Conductor Screen: Semi-conducting thermosetting compound
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Insulation: Cross-linked polyethylene (XLPE)
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Insulation Screen: Semi-conducting thermosetting compound
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Bedding Tape: Semi-conducting water swellable tape
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Metallic Sheath: Copper wire screen and/or lead sheath
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Longitudinal Moisture Barrier: Water swellable tape
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Radial Moisture Barrier: Laminated aluminum tape
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Outer Sheath: Extruded HDPE with graphite coating
This robust construction ensures durability, moisture resistance, and long-term operational reliability.
Performance and Testing
Riyadh Cables’ HV & EHV cables have undergone extensive type testing, including long-term performance evaluations conducted at both Riyadh Cables Laboratories and King Saud University. These tests have demonstrated that cables designed with an electrical stress of 13 kV/mm can operate effectively for over 30 years. Consequently, the cables are designed with stress levels of 8 kV/mm for High Voltage and 12 kV/mm for Extra High Voltage applications, providing a substantial safety margin.
Engineering and Support
Riyadh Cables employs a skilled team of engineers who specialize in designing HV & EHV circuits tailored to regional operating conditions. They perform comprehensive calculations for current rating, induced voltage, and short circuit currents for both conductors and screens. Additionally, they compute positive, negative, and zero sequence impedances to meet specific customer requirements and ensure effective network protection.
Applications
The HV & EHV cables are suitable for a wide range of applications, including:
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Power transmission and distribution networks
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Industrial and commercial installations
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Infrastructure projects requiring high-capacity power delivery
