General Introduction of IEC60840 Standard High Voltage Cable

Today we are introducing the commonly used high-voltage cables under the IEC60840 standard.

The International Electrotechnical Commission’s standard IEC 60840 references the requirements for cables and cable accessories with a voltage rating of between 30kV (Um 36kV) and 150kV (Um 170kV). 

The cables are either single-core or individually screened three-core cables but, as with the lower voltage standard IEC 60502, it excludes lines for special applications such as submarine and mining.

These high-voltage cables are designed for fixed installations and are suitable for primary power distribution. These cables have an outer sheath of High-Density Polyethylene (HDPE), which balances abrasion resistance and flexibility.

To achieve compliance with this international standard, the cables are subject to regular type test sequences, simulated to represent a 30-year service life on a cable sample of at least 1 meter. Unlike in the IEC 60502 Part 2 testing, IEC 60840 sees voltage applied during the burner heating cycles. 

ZMS cable supplies a comprehensive range of British, European, and International standard High Voltage (HV) cables. We also provide customized HV cable solutions designed around the applications and project-specific requirements. 

This may require unusual quantities or lengths, short production lead times, and/or technically challenging constructions.

The standard high-voltage cables, which include 2XS(F)2Y, 2XS(FL)2Y, A2XS(F)2Y, and A2XS(FL)2Y are designed for the primary distribution of power on networks with a voltage rating of 123kV. HV cables are triple extruded to the latest IEC standards using proprietary materials on modern catenary line equipment. 

They are suitable for installations providing mechanical protection to the cable. Water-blocking tape options help ensure that should the high power wire be damaged, the repair lengths and associated works are kept to a minimum. A high-density polyethylene (HDPE) is used as standard and offers a compromise between abrasion resistance and flexibility, however, various other options are available on request.

High Voltage Cables Specifications 2XS(F)2Y A2XS(F)2Y 110kV

Application

The high-voltage power cables contained within this datasheet are suitable for the primary distribution of power up to a maximum network voltage of 110kV. Suitable for locations where mechanical protection is afforded by other means and where the additional protection of a moisture barrier has been determined not to be necessary, see 2XS(FL)2Y and A2XS(FL)2Y. 

The cables are triple extruded using proprietary materials on modern catenary line equipment to the latest IEC standards. Water-blocking tape options ensure that should the cable be damaged, repair lengths and associated works are kept to a minimum. The cables are provided as standard with a high-density polyethylene sheath, chosen to give the best compromise between abrasion resistance and flexibility to ensure installation confidence. The range can be customized to meet specific project demands should the need arise.

Construction

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)

Insulation: XLPE (Cross-Linked Polyethylene)

Insulation Screen: Extruded 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)

Characteristics

Voltage Rating: (Uo/U) (Um) 64/110kV (123kV)

Highest Network Voltage: (Um) 123kV

Maximum Conductor Temperature In Service

(Operating temperature-continuous operation): +90°C

Short Circuit Temperature: +250°C

Overload Temperature: +130°C (100h per year maximum)

Operating Temperature: -30°C to 90°C

Minimum Installation Temperature: -20°C

As a professional high voltage cable manufacturer, we have the following matters in our services: