The AKVVG cable is used for stationary connection to electrical devices and equipment with a nominal voltage of up to 660 V AC (up to 100 Hz) or up to 1000 V DC. It is suitable for installation in buildings, ducts, tunnels, and underground, including aggressive environments, ensuring reliable transmission of control and monitoring signals.
KVVG cables are used for the permanent connection of electrical equipment and devices operating on AC voltage up to 660 V (up to 100 Hz) or DC voltage up to 1000 V. They are suitable for installation in buildings, ducts, tunnels, and underground, including in aggressive environments, ensuring reliable transmission of control and monitoring signals.
The main requirements for cables of this group are established in GOST 26411-85
Cables with the letter “E” in their designation (AKVVGE, KVVGE) have a shield over the twisted conductors. The designation of AKVVG and KVVG cables with filling includes the index “z”. For AKPVG, KPVG, AKVVG, and KVVG cables in a flat design, the index “P” is added to the brand name with a hyphen.
Cables of the AKPVG, AKVVG, KPVG, and KVVG brands are designed for installation in dry and humid industrial premises, on special cable overpasses, in blocks, including under exposure to aggressive environments, but without significant mechanical stress. If mechanical stress is present but without substantial tensile forces, it is recommended to use AKPVBG, KPVBG, AKVVBG, KVVBG, AKVVBbG, and KVVBbG cables for the same applications. AKVVG-z and KVVGz cables are used for connections to devices requiring cable sealing at the entry point. KPVGE, AKVVGE, and KVVGE cables are used when it is necessary to protect electrical circuits from external electric fields.
AKPBbShv, KPVBbShv, AKVBbShv, and KVBbShv cables are intended for all the above-mentioned applications, as well as for underground installation, including in aggressive environments. If significant tensile forces affect the cable, the KVPbShv cable with wire armor is recommended.
In addition to using special polymer materials, fire-resistant cables may include structural elements such as additional belt insulation made of low-combustibility materials, extra barriers made of inorganic tapes, and so on.
The majority of cables are designed for stationary operation at ambient temperatures ranging from -50 to +50 °C. Cables with the “ng-LS” index are intended for stationary operation in enclosed spaces at ambient temperatures from -30 to +50 °C.
Flat-design cables contain 4 copper conductors with a cross-section of 0.75–6 mm² or 4 aluminum conductors with a cross-section of 2.5–6 mm². Cables with filling according to GOST 1508-78 are produced with 4 or 5 conductors across all cross-section ranges for copper and aluminum conductors, respectively. The copper and aluminum current-carrying conductors of the cables are single-wire (except for KGVV, KGVVE, and KGVV-ng cables).
Cables must withstand an AC voltage test of 2500 V at a frequency of 50 Hz for 5 minutes. The electrical insulation resistance of the cable conductors, recalculated per 1 km length at a temperature of 20 °C, must be at least: 300 MΩ for cables with polyethylene insulation; 10 MΩ for cables with polyvinyl chloride insulation for conductor cross-sections of 0.75–1.5 mm², 9 MΩ for cross-sections of 2.5 and 4 mm², and 6 MΩ for cross-sections of 6 and 10 mm². The electrical insulation resistance of halogen-free polymer compositions is at the level of values specified for polyvinyl chloride insulation. The maximum permissible long-term operating temperature on the conductor should not exceed 70 °C. The service life of cables is at least 15 years, and when installed in buildings, ducts, and tunnels—at least 25 years.
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