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Telephone cables with insulation and a sheath made of polymer materials, designed for operation in networks with a nominal remote power supply voltage of up to 225 and 145V AC at 50 Hz or a voltage of up to 315 and 200V DC, respectively.
The cables are classified into telephone cables GERDA-TP, special telephone cables GERDA-ST, and telephone exchange cables GERDA-TS.
GERDA-TP telephone cables and GERDA-ST special telephone cables are designed for use in local primary communication networks. GERDA-ST cables have enhanced protection against external electromagnetic interference. GERDA-TP and GERDA-ST comply with GOST 31943-2012.
GERDA-TS telephone exchange cables are designed for the installation of low-frequency exchange equipment in telephone stations.
The primary application area is shown in Table 7.
The nominal diameter of copper conductors (see Table 2): 0.32 mm; 0.4 mm; 0.5 mm; 0.64 mm; 0.7 mm.
In GERDA-TP telephone cables, the conductor insulation can be (optional, see Table 3):
The conductor insulation of GERDA-ST cables is made of polyethylene “P”.
The conductor insulation of GERDA-TS exchange cables is made of the following materials:
Insulated conductors, distinctly different in insulation color, are twisted into pairs (triples).
Cables with up to 100 pairs (triples) can be twisted using either a layer twist method or a bundle twist method.
In the layer twist method, all pairs (triples) may have:
In the bundle twist method, the cable core with up to 100 pairs (triples) consists of groups (elementary bundles of 5 or 10 pairs) with distinguishing colored binding threads (see Table 6). In cables with more than 100 pairs, the core is twisted from main bundles consisting of 50 or 100 pair bundles.
By agreement with the customer, the core center may contain 2 signal conductors (for cables with 10 to 100 pairs) or 4 signal conductors (for cables with 100 or more pairs). Cables designed for installation in high-humidity conditions are manufactured with water-blocking tapes “v” or a hydrophobic filler “Z”.
Cables with the “FR” index are fire-resistant, with conductor insulation made of silicone rubber. These cables maintain functionality for at least 180 minutes under open flame exposure and temperatures of +750°C (PO1 according to GOST 31565-2012). GERDA-TP and GERDA-TS cables have a common shield made of aluminum-polymer tape with a tinned drain wire. The sheath of cables labeled with the material “P” is made of polyethylene, while cables with the index “ng(A)-HF” are made of halogen-free polymer compositions.
Cables labeled with the material “V” have a sheath made of PVC compounds, with the index “ng(A)” indicating low flammability PVC, and “ng(A)-LS” indicating low fire hazard with reduced smoke and gas emission. Cables labeled with the material “T” have a sheath made of thermoplastic elastomers, offering an extended operating temperature range from -50°C to +125°C. Special GERDA-ST cables have an aluminum sheath “A” providing protection against increased electromagnetic interference. The sheath of cables designed for suspension on communication line supports is applied simultaneously to the cable core and the steel strand, which acts as a supporting element.
Cables may have armor made of galvanized steel wires or galvanized steel tapes, with external protective coverings compliant with GOST 7006.
Cables that are subject to increased requirements for external influencing factors can be manufactured in the following versions:
“T” — heat-resistant (up to +200°C, for material “T”);
“HL” — frost-resistant;
“EHL” — resistant to extremely cold conditions, cable installation down to -40°C;
“UV” — UV-resistant;
“H” — resistant to acids, alkalis, and environments with high hydrogen sulfide content;
“M” — oil and fuel-resistant;
“ZG” — sheath resistant to rodents, ants, and termites;
“DV60” — service life of at least 60 years.
| Type of product | |
| T | telephone |
| ST | special telephone |
| TS | telephone exchange |
| Conductor insulation material | |
| P | polyethylene (if the index ng(A)-HF is present – halogen-free polymer composition) |
| pp | foam-skin polyethylene |
| Ps | cross-linked polyolefin |
| V | PVC compound |
| T | thermoplastic elastomer |
| R | silicone rubber |
| Cable sheath material without armor or inner sheath for armored cable | |
| P | polyethylene (if the index “HF” is present – halogen-free polymer composition) |
| PP | anti-corrosion layer and polyethylene |
| V | PVC compound |
| T | thermoplastic elastomer |
| A | aluminum |
| Overall shield is present in all cables, but for some types, it does not need to be explicitly indicated – see Table 3 | |
| no shield designation | |
| ep | made of aluminum-polymer tape |
| Water penetration protection | |
| none | |
| Z | hydrophobic filling |
| v | water-blocking tape |
| Integrated cable messenger | |
| no messenger | |
| t | with integrated steel messenger |
| Armor | |
| no armor | |
| B | tape armor with outer protective covering |
| BG | tape armor without outer protective covering |
| BbG | tape armor, interlocked, without outer protective covering |
| Bb | armor with galvanized steel tapes |
| Kb | armor with galvanized steel wires |
| Protective hose for armored cable | |
| no protective hose | |
| ShP | UV-stabilized polyethylene |
| ShV | PVC compound |
| P | UV-stabilized polyethylene |
| Fire safety rating |
| – |
| ng(A) |
| ng(A)-LS |
| ng(A)-HF |
| ng(A)-FRLS |
| ng(A)-FRHF |
| Number of structural elements see Table 2 |
| Structural element | |
| 2 | pair |
| 3 | triple |
| Conductor diameter, mm |
| 0.32, 0.4, 0.5, 0.64, 0.7 |
| Special characteristics | |
| no special characteristic | |
| HL | enhanced frost resistance of cables |
| EHL | resistance to extreme cold conditions |
| UV | UV-resistant |
| M | oil and gasoline-resistant design |
| H | resistant to chemically aggressive environments |
| T | enhanced heat resistance |
| ZG | resistant to damage by rodents, ants, termites |
| DV60 | cable service life of at least 60 years |
| Operating voltage | |
| not specified for TS cable | |
| 200 | up to 200V DC |
| 315 | up to 315V DC |
x
x
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| Example of cable designation when ordering | Description |
| GERDA-TPsPepBbShpng(A)-HF 20x2x0.5 EHL–315 TU 27.32.13-040-76960731-2016 | Telephone cable for local primary communication networks with a nominal voltage of 315V, with 20 pairs of single-wire copper conductors with a diameter of 0.5 mm, insulated with cross-linked polyolefin, with a common screen made of aluminum-polymer tape, armored with steel tapes without a cushion, with a protective sheath made of a halogen-free polymer composition, resistant to extreme cold conditions |
| GERDA-TPPepT 100x2x0.32–200 TU 27.32.13-040-76960731-2016 | Telephone cable for local primary communication networks with a nominal voltage of 200V, with 100 pairs of single-wire copper conductors with a diameter of 0.32 mm, with polyethylene insulation, with a common screen made of aluminum-polymer tape, in a polyethylene sheath, with an integrated steel cable |
| GERDA-TSVng(A) 103x2x0.5 TU 27.32.13-040-76960731-2016 | Telephone exchange cable for mounting low-frequency exchange equipment, with 103 pairs of single-wire copper conductors with a diameter of 0.5 mm, insulated with PVC compound, with a common screen made of aluminum-polymer tape, in a low-flammability PVC sheath |
| Characteristics | Parameters |
| Operating temperature | from −70° to +200°C (see Table 4) |
| Minimum cable installation temperature | not below −40°C for cables with the “EHL” index not below −30°C for cables with the “HL” index not below −10°C for cables with a polyethylene sheath and hydrophobic filling not below −15°C for other cable types |
| Operating voltage | up to 145V and 225V AC at 50 Hz up to 200V and 315V DC |
| Electrical insulation resistance during operation, t = +20°C | at least 6500 MΩ·km for cables with polyethylene insulation without hydrophobic filler at least 5000 MΩ·km for cables with polyethylene insulation with hydrophobic filler at least 6500 MΩ·km for cables with cross-linked polyolefin insulation at least 100 MΩ·km for cables with silicone rubber insulation at least 50 MΩ·km for cables with halogen-free polymer composite insulation at least 50 MΩ·km for cables with thermoplastic elastomer insulation at least 10 MΩ·km for cables with PVC insulation |
| Electrical resistance of conductive cores during operation, t = +20°C | 216 (± 13) Ω for conductive cores with a diameter of 0.32 mm 139 (± 9) Ω for conductive cores with a diameter of 0.4 mm 90 (+ 5.9 ÷ −6.0) Ω for conductive cores with a diameter of 0.5 mm 55 (± 3) Ω for conductive cores with a diameter of 0.64 mm 45 (± 3) Ω for conductive cores with a diameter of 0.7 mm |
| Operating capacitance, recalculated per 1 km length at a frequency of 0.8 or 1.0 kHz | not more than 50 nF for cables with polyethylene insulation without hydrophobic filler not more than 55 nF for cables with polyethylene insulation with hydrophobic filler not more than 70 nF for cables with cross-linked polyolefin insulation not more than 85 nF for cables with silicone rubber insulation not more than 140 nF for cables with halogen-free polymer composite insulation not more than 140 nF for cables with thermoplastic elastomer insulation not more than 140 nF for cables with PVC insulation |
| Climatic performance | performance “UHL”, “TS”, “T” placement category 1, 2, 4 (according to GOST 15150-69). Cables can be used in all macroclimatic regions, including tropical areas. |
| Fire resistance (for “FR” cables) | at least 180 minutes under open flame exposure and a temperature of at least +750°C (PO1 according to GOST 31565-2012) |
| Resistance to longitudinal moisture spread in case of outer sheath damage | moisture is completely blocked in the design with a water-blocking element and hydrophobic filling |
| Mold resistance | cables are resistant to mold exposure, with a biological contamination rating of up to 2 points |
| Permissible bending radii for installation and operation | For non-armored cables: at least 10 diameters for plastic sheaths and 15 diameters for aluminum sheaths. For armored cables: at least 12 diameters for plastic sheaths and 20 diameters for aluminum sheaths. |
| Service life, at least | 60 years for “DV60” cables, 30 years for GERDA-ST cables, 20 years for cables with silicone rubber insulation, 25 years for other cables |
| Cable name | Construction element | Nominal conductor diameter, mm | Number of construction elements: pairs (“x2”), triples (“x3”) |
| GERDA-TP telephone cable | Pair (“x2”) | 0.32; 0.40; 0.50; 0.64; 0.7 | 2×2; 5×2; 10×2; 20×2; 30×2; 50×2; 100×2; 150×2; 200×2; 300×2; 400×2; 500×2; 600×2 |
| GERDA-ST special telephone cable | Pair (“x2”) | 0.50 | 10×2; 20×2; 30×2; 50×2; 100×2; 200×2 |
| GERDA-TS telephone exchange cable | Pair (“x2”) | 0.32; 0.40; 0.50 | 5×2; 10×2; 16×2; 20×2; 30×2; 41×2; 103×2 |
| Triple (“x3”) | 5×3; 10×3; 20×3 |
| Cable brand | Cable name | Design features |
| GERDA-TPPep | telephone cable with polyethylene insulation, in a polyethylene sheath, shielded | – |
| GERDA-TPPepZ | with hydrophobic filler | |
| GERDA-TPPepv | with water-blocking tape | |
| GERDA-TPPepBbShp | in tape armor, in a polyethylene protective hose | |
| GERDA-TPPepKbShp | in wire armor, in a polyethylene protective hose | |
| GERDA-TPPepZBbShp | with hydrophobic filler, in tape armor, in a polyethylene protective hose | |
| GERDA-TPPepvBbShp | with water-blocking tape, in tape armor, in a polyethylene protective hose | |
| GERDA-TPPepZKbShp | with hydrophobic filler, in wire armor, in a polyethylene protective hose | |
| GERDA-TPPepvKbShp | with water-blocking tape, in wire armor, in a polyethylene protective hose | |
| GERDA-TPPept | with built-in cable | |
| GERDA-TPppZP | telephone cable with foam-skin polyethylene insulation, in a polyethylene sheath, shielded | with hydrophobic filler |
| GERDA-TPppvP | with water-blocking tape | |
| GERDA-TPPepB | telephone cable with polyethylene insulation, in a polyethylene sheath, shielded | in tape armor, with an external protective covering |
| GERDA-TPPepZB | with hydrophobic filler, in tape armor, with an external protective covering | |
| GERDA-TPPepvB | with water-blocking tape, in tape armor, with an external protective covering | |
| GERDA-TPPepBG | in tape armor, without an external protective covering | |
| GERDA-TPPepBbG | in tape armor, applied in a “lock”, without an external protective covering | |
| GERDA-TPPepvBG | with water-blocking tape, in tape armor, without an external protective covering | |
| GERDA-TPsPep | telephone cable with cross-linked polyolefin insulation, in a polyethylene sheath, shielded | – |
| GERDA-TPsPepZ | with hydrophobic filler | |
| GERDA-TPsPepv | with water-blocking tape | |
| GERDA-TPsPepBbShp | in tape armor, in a polyethylene protective hose | |
| GERDA-TPsPepKbShp | in wire armor, in a polyethylene protective hose | |
| GERDA-TPsPepZBbShp | with hydrophobic filler, in tape armor, in a polyethylene protective hose | |
| GERDA-TPsPepvBbShp | with a water-blocking tape, in wire armor, in a polyethylene protective hose | |
| GERDA-TPsPepZKbShp | with hydrophobic filler, in wire armor, in a polyethylene protective hose | |
| GERDA-TPsPepvKbShp | with a water-blocking tape, in tape armor, in a polyethylene protective hose | |
| GERDA-TPsPept | with an integrated cable | |
| GERDA-TPsPepng(A)-HF | telephone cable with cross-linked polyolefin insulation, in a halogen-free polymer composite sheath, shielded | – |
| GERDA-TPsPepvng(A)-HF | with a water-blocking tape | |
| GERDA-TPsPepBbShpng(A)-HF | in tape armor, in a polyethylene protective hose | |
| GERDA-TPsPepKbShpng(A)-HF | in wire armor, in a polyethylene protective hose | |
| GERDA-TPsPepvBbShpng(A)-HF | with a water-blocking tape, in tape armor, in a polyethylene protective hose | |
| GERDA-TPsPepvKbShpng(A)-HF | with a water-blocking tape, in wire armor, in a polyethylene protective hose | |
| GERDA-TPV | telephone cable with polyethylene insulation, in a PVC sheath, shielded | – |
| GERDA-TPVBG | in tape armor, without an external protective covering | |
| GERDA-TPVBbShv | in tape armor, in a PVC protective hose | |
| GERDA-TPVKbShv | in wire armor, in a PVC protective hose | |
| GERDA-TPVng(A) | telephone cable with polyethylene insulation, in a low-combustibility PVC sheath, shielded | – |
| GERDA-TPVBbShvng(A) | in tape armor, in a PVC protective hose | |
| GERDA-TPVKbShvng(A) | in wire armor, in a PVC protective hose | |
| GERDA-TPVng(A)-LS | telephone cable with polyethylene insulation, in a PVC sheath with reduced fire hazard and low smoke and gas emissions, shielded | – |
| GERDA-TPVBBShvng(A)-LS | in tape armor, in a protective PVC hose | |
| GERDA-TPVKBShvng(A)-LS | in wire armor, in a protective PVC hose | |
| GERDA-TRVng(A)-FRLS | telephone cable with silicone rubber insulation, in a low fire hazard PVC sheath with low smoke and gas emission, shielded, fire-resistant | – |
| GERDA-TRVBBShvng(A)-FRLS | in tape armor, in a protective PVC hose | |
| GERDA-TRVKBShvng(A)-FRLS | in wire armor, in a protective PVC hose | |
| GERDA-TRPng(A)-FRHF | telephone cable with silicone rubber insulation, in a halogen-free polymer composite sheath, shielded, fire-resistant | – |
| GERDA-TRPBBShpng(A)-FRHF | in tape armor, in a polyethylene protective hose | |
| GERDA-TRPKBShpng(A)-FRHF | in wire armor, in a polyethylene protective hose | |
| GERDA-STPAPP | special telephone cable with polyethylene insulation, in aluminum and polyethylene sheaths | – |
| GERDA-STPAPPB | in tape armor, with an outer protective cover | |
| GERDA-STPAPPBG | in tape armor, without an outer protective cover | |
| GERDA-STPAPBP | in tape armor, with an outer polyethylene protective hose | |
| GERDA-STPAV | special telephone cable with polyethylene insulation, in aluminum and PVC sheaths | |
| GERDA-TSV | station telephone cable with PVC plastic insulation and sheath, shielded | |
| GERDA-TSVng(A) | station telephone cable with PVC plastic insulation, with a low-flammability PVC plastic sheath, shielded | |
| GERDA-TSVng(A)-LS | station telephone cable with low fire hazard PVC plastic insulation and sheath, with low smoke and gas emission, shielded | |
| GERDA-TSPng(A)-HF | station telephone cable with insulation and sheath made of halogen-free polymer composites, shielded | |
| GERDA-TSPsng(A)-LS | station telephone cable with cross-linked polyolefin insulation, with low fire hazard PVC plastic sheath and low smoke and gas emission, shielded | |
| GERDA-TSPsng(A)-HF | station telephone cable with cross-linked polyolefin insulation, with a halogen-free polymer composite sheath, shielded | |
| GERDA-TSTng(A) | station telephone cable with thermoplastic elastomer insulation and sheath, shielded | |
| Sheath material | Fire safety rating | Sheath material description | Operating temperature of the cable, °C |
| P | (without index) | Polyethylene sheath (for cable without hydrophobic filler) | -50°…+60°C |
| Polyethylene sheath (for cable with hydrophobic filler) | -50°…+50°C | ||
| ng(A)-HF | Sheath made of polymer compositions that do not spread combustion in group installation and do not emit corrosive gaseous products during burning and smoldering | -50°…+70°C | |
| ng(A)-FRHF | Same, fire-resistant cable | -50°…+70°C | |
| ng(A)-HF HL | Sheath made of polymer compositions that do not spread combustion in group installation and do not emit corrosive gaseous products during burning and smoldering, cold-resistant version | -60°…+70°C | |
| ng(A)-HF EHL | Sheath made of polymer compositions that do not spread combustion in group installation and do not emit corrosive gaseous products during burning and smoldering, extreme cold-resistant version, installation down to -40°C | -70°…+70°C | |
| V | (without index) | Sheath made of PVC plastics | -50°…+70°C |
| ng(A) | Sheath made of low-combustibility PVC plastics | -50°…+70°C | |
| ng(A) HL | Sheath made of low-combustibility PVC plastics, cold-resistant version | -60°…+70°C | |
| ng(A)-LS | Cables that do not spread combustion in group installation, with reduced smoke and gas emission | -50°…+70°C | |
| ng(A)-FRLS | Same, fire-resistant cable | -50°…+70°C | |
| T | ng(A) | Insulation and sheath made of flame-retardant thermoplastic elastomers | -50°…+125°C (for T version) -50°…+200°C (for T-T version) |
| Pair (Triple) reference number in elementary bundle | Designation and color of conductor | ||
| a | b | c | |
| 1 2 3 4 5 | White | Blue Orange Green Brown Gray | Turquoise |
| 6 7 8 9 10 | Red | Blue Orange Green Brown Gray | |
| Nominal number in the elementary bundle | Color of binding elements | Nominal number in the elementary bundle | Color of binding elements |
| 1 | Blue | 6 | White |
| 2 | Orange | 7 | Red |
| 3 | Green | 8 | Black |
| 4 | Brown | 9 | Yellow |
| 5 | Gray | 10 | Purple |
| Cable brand | Cable name | Preferred application area |
| GERDA-TPPep | Telephone cable with solid polyethylene insulation, aluminum-polymer tape screen, in a polyethylene sheath | For installation in telephone ducts, collectors, shafts, along building walls, and for suspension on overhead communication lines |
| GERDA-TPPepZ | Same, with hydrophobic filling | Same, and in high humidity conditions |
| GERDA-TPPepv | Same, with a water-blocking tape instead of hydrophobic filling | |
| GERDA-TPppZP | Telephone cable with foam-skin polyethylene insulation, hydrophobic filling, in a polyethylene sheath, shielded | |
| GERDA-TPppvP | Same, with a water-blocking tape | |
| GERDA-TPPepB | Telephone cable with solid polyethylene insulation, aluminum-polymer tape screen, in a polyethylene sheath, armored with steel tapes, with an external protective covering | For installation in all types of soil that are not highly corrosive to steel armor and not subject to frost heaving |
| GERDA-TPPepZB | Same, with hydrophobic filling | Same, and in high humidity conditions |
| GERDA-TPPepBG | Telephone cable with solid polyethylene insulation, aluminum-polymer tape screen, in a polyethylene sheath, armored with galvanized steel tapes | For installation in collectors, tunnels, and shafts |
| GERDA-TPPepBbg | Same, with armor applied in a “lock” formation | |
| GERDA-TPPepBbpShp | Telephone cable with solid polyethylene insulation of conductors, with an aluminum-polymer tape screen, in a polyethylene sheath, armored with galvanized steel tapes, with an outer protective polyethylene hose | For laying in soils of all categories (except mechanized laying in rocky soils), not subject to permafrost deformations |
| GERDA-TPPepZBbpShp | Same, with hydrophobic filling | Same, and in high humidity conditions |
| GERDA-TPPepvBbpShp | Same, but instead of hydrophobic filling, a water-blocking tape is used | |
| GERDA-TPPepKbShp | Telephone cable with solid polyethylene insulation of conductors, with an aluminum-polymer tape screen, in a polyethylene sheath, armored with galvanized steel wires, with an outer protective polyethylene hose. Increased resistance to tensile forces | For laying in soils of all categories (except mechanized laying in rocky soils), not subject to permafrost deformations |
| GERDA-TPPepZKbShp | Same, with hydrophobic filling | Same, and in high humidity conditions |
| GERDA-TPPepvKbShp | Same, but instead of hydrophobic filling, a water-blocking tape is used | |
| GERDA-TPPept | Telephone cable with solid polyethylene insulation of conductors, with an aluminum-polymer tape screen, in a polyethylene sheath, with an integrated support wire | For suspension on poles |
| GERDA-TPV | Telephone cable with solid polyethylene insulation of conductors, with an aluminum-polymer tape screen, in a sheath made of polyvinyl chloride (PVC) plastic | For single installation along interior walls of buildings and inside premises |
| GERDA-TPVng(A)-LS | Same, in a sheath made of low-flammability PVC plastic with low smoke and gas emission | Same, and for bundle installation (group installation) |
| GERDA-TPsPepng(A)-HF | Telephone cable with cross-linked polyolefin insulation, in a halogen-free polymer composition sheath, shielded | |
| GERDA-TPVBbShvng(A)-LS | Telephone cable with solid polyethylene core insulation, with an aluminum-polymer tape screen, in a low-flammability PVC plastic sheath with low smoke and gas emission, armored with galvanized steel tapes, with an outer protective PVC hose | For single and group installation indoors, in dry tunnels |
| GERDA-TPsPepBbShpng(A)-HF | Telephone cable with cross-linked polyolefin core insulation, with an aluminum-polymer tape screen, in a halogen-free polymer composition sheath, armored with galvanized steel tapes, with an outer protective polyethylene hose | |
| GERDA-TPVKbShvng(A)-LS | Telephone cable with solid polyethylene core insulation, with an aluminum-polymer tape screen, in a low-flammability PVC plastic sheath with low smoke and gas emission, armored with galvanized steel wires, with an outer protective PVC hose. Increased resistance to tensile forces | Same, and when installing cable with a large slope or on vertical sections |
| GERDA-TPsPepKbShpng(A)-HF | Telephone cable with cross-linked polyolefin core insulation, with an aluminum-polymer tape screen, in a low-flammability PVC plastic sheath with low smoke and gas emission, armored with galvanized steel wires, with an outer protective polyethylene hose. Increased resistance to tensile forces | |
| GERDA-TPVBG | Telephone cable with solid polyethylene core insulation, with an aluminum-polymer tape or aluminum tape screen, in a PVC plastic sheath, armored with galvanized steel tapes | For indoor installation, in dry tunnels |
| GERDA-STPAPP | Special telephone cable with solid polyethylene core insulation, in aluminum and polyethylene sheaths | For installation in ducts, collectors, and soils of all categories (except mechanized – in rocky soils), not subject to frost heave, if the cable is not exposed to high tensile forces, in conditions characterized by increased electromagnetic influence |
| GERDA-STPAPPBG | Same, armored with two steel tapes, with anti-corrosion coating | For installation in collectors, tunnels, in conditions characterized by increased electromagnetic influence |
| GERDA-STPAPBP | Special telephone cable with solid polyethylene core insulation, in aluminum and polyethylene sheaths, armored with two steel tapes, with an outer protective polyethylene hose | For soils of all categories (except mechanized – in rocky soils), not subject to frost heave, in conditions characterized by increased electromagnetic influence |
| GERDA-STPAV | Special telephone cable with solid polyethylene core insulation, aluminum, and PVC sheaths | For installation in collectors, tunnels, in conditions characterized by increased electromagnetic influence, indoors, and along building walls |
| GERDA-TRV…ng(A)-FRLS | Telephone cable with silicone rubber insulation, in a low-hazard PVC plastic sheath with low smoke and gas emission, with an aluminum-polymer tape screen, fire-resistant | For installation in fire protection systems, as well as other systems that must remain operational in fire conditions |
| GERDA-TRP…ng(A)-FRHF | Telephone cable with silicone rubber insulation, in a halogen-free polymer composite sheath, with an aluminum-polymer tape screen, fire-resistant | |
| GERDA-TSV | Station telephone cable with PVC plastic insulation and sheath, shielded | For single installation in industrial premises |
| GERDA-TSVng(A)-LS | Station telephone cable with low-hazard PVC plastic insulation and sheath, with low smoke and gas emission, shielded | For installation (including group installation), considering the combustible load of cables, inside buildings and structures |
| GERDA-TSPsng(A)-LS | Station telephone cable with cross-linked polyolefin insulation, with a low-hazard PVC plastic sheath and low smoke and gas emission, shielded | |
| GERDA-TSPng(A)-HF | Station telephone cable with halogen-free polymer composite insulation and sheath, shielded | For installation (including group installation), considering the combustible load of cables, inside buildings and structures with a high concentration of people, including multifunctional high-rise buildings and building complexes |
| GERDA-TSPsng(A)-HF | Station telephone cable with cross-linked polyolefin insulation, with a halogen-free polymer composite sheath, shielded |
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