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Flexible power cable GERDA-TFL

Flexible power cable GERDA-TFL

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  • Affordable prices, no markups or overpayments;
  • Stability of production and rhythm of deliveries;
  • We comply with GOSTs and all technological standards.

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Delivery is carried out as soon as possible after the order is placed.

Flexible power cable GERDA-TFL for telecommunication equipment (TU 27.32.13-044-76960731-2020)

  • The flexible power cable GERDA-TFL is designed for use in telephone exchanges, mobile base stations, data centers, uninterruptible power supplies, and similar equipment where a cable with low inductance and high electromagnetic compatibility is required. The GERDA-TFL cable can serve as a replacement for the TFL 492 32 (Ericsson) cable.

    The cable is intended for the transmission and distribution of electrical power in stationary DC installations with a nominal voltage of 600V, a nominal AC voltage of U = 380V at a frequency of 50Hz, and a maximum AC voltage of Um = 600V.

    Fire-resistant “FR” cables are used for connecting devices that must remain operational in fire conditions.

  • GERDA-TFL ng(B)-HF 2x10 PEEl-UF
    Flexible power cable
    GERDA-TFL ng(B)-HF 2×10 PEEl-UF

Cable construction

  • Conductors

    GERDA-TFL is produced with multi-stranded tinned or copper “m” conductors of Class 5 according to GOST 22483-2012 (high flexibility). The conductors are flat-shaped, consisting of three parallel-laid strands of soft copper wires.

    The nominal cross-section of the copper conductors: 2.5; 4; 6; 10; 16; 25 mm². By agreement with the customer, cables with a different number of conductors and nominal cross-section can be manufactured.

    In fire-resistant “FR” cables, a wrapping of two mica-containing tapes is applied over the conductors, preventing them from short-circuiting in case of fire.

    The conductor insulation can be made of:

    • PVC compound “B” (maximum cable flexibility),
    • Halogen-free polymer composition “P” (maximum cable flexibility),
    • Cross-linked polyolefin “Ps”,
    • Thermoplastic elastomer “T” (less flexible cable).

    One conductor is insulated in gray, the other in black.

    Overall Shield

    An overall shield may be applied over the core of two flat conductors, available in the following types:

    • “E” — Wrapping with aluminum foil tape (Alumoflex) with a multi-stranded tinned copper drain wire,
    • “Em” — Copper wire braid,
    • “El” — Tinned copper wire braid,
    • “Emf” — Wrapping with copper foil tape with a multi-stranded tinned copper drain wire,
    • “EEl” — Copper wire braid over Alumoflex wrapping.

  • Armor

    Cables may have armor under the outer sheath:

    • “K” — Solid steel galvanized wire armor,
    • “Ko” — Braided galvanized wire armor.

    Outer Sheath

    The outer sheath can be made of (see Table 3):

    • Low fire hazard PVC compound,
    • Halogen-free polymer composition,
    • Thermoplastic elastomer.

    The color of the outer sheath is specified when ordering. If not specified, the sheath is produced in gray; for the “UF” version, the sheath is black.

    Special Cable Versions:

    • “EHL” — Resistant to extremely cold conditions, installation possible at temperatures as low as -40°C,
    • “UF” — Sheath resistant to solar radiation, rain exposure, dynamic abrasive dust impact, and frost formation,
    • “H” — Sheath resistant to acids, alkalis, and environments with high hydrogen sulfide content,
    • “M” — Sheath resistant to gasoline and industrial oil,
    • “ZG” — Sheath resistant to rodents, ants, and termites.

    Such cables have a fire hazard rating of “ng(C)-HF” or “ng(C)-FRHF” and are less flexible due to the rigid sheath.


Table 1. Technical specifications

Nominal voltage— 600 V DC — 380 V AC at a nominal frequency of 50 Hz, maximum voltage Um = 600 V
Insulation electrical resistance at +20°C, minimum— 500 MΩ/km for cross-linked polyolefin “Ps” insulation
— 100 MΩ/km for halogen-free polymer compositions “P” and thermoplastic elastomer “T”
— 10 MΩ/km for PVC insulation
Electrical resistance of conductive coresElectrical resistance of conductors complies with GOST 22483-2012
AC voltage test at 50 Hz / 5 min— Non-shielded cables: 2500 V
— Shielded cables: 2000 V
Operating temperature in stationary conditionfrom -60° to +90°C for cables with “P” index
from -60° to +80°C for cables with “Ps” index
from -70° to +70°C for cables with “P” index resistant to extreme cold conditions “EHL”
from -60° to +125°C for cables with material “T”
from -60° to +70°C for “V” cables
Minimum installation temperature, not lower than— minus 40°C for cables with “EHL” index
— minus 30°C for other cables
Impact resistance at low temperature— minus 60°C for “EHL” cables
— minus 40°C for other cables
Climatic performance according to GOST 15150“V” version, placement category 1-5, suitable for all macroclimatic regions
Fire resistance of cables with “FR” indexat least 180 minutes under flame exposure and temperatures of at least +750°C (PO1 as per GOST 31565)
Resistance to mold fungiCables are resistant to mold fungi, biological fouling level up to grade 2
Seismic and vibration resistanceMaintain functionality under seismic impact of at least 7 on the MSK-64 scale.
Minimum installation and operational bending radii inD (largest outer cable dimension), at least— 3D for non-armored cables
— 4D for wire-armored cables
Service life, minimumfor cables with insulation and sheath made of thermoplastic elastomers “T” — at least 25 years,
other cables — at least 30 years
Warranty period2 years from the date of cable commissioning

Table 2. Permissible conductor heating temperature

Conductor insulation materialPermissible conductor heating temperature, °C
ContinuousOverload modeMaximum in short circuitNon-ignition in short circuit
“B” — PVC compound7090160350
“P” — Halogen-free polymer composition90100170350
“Ps” — Cross-linked polyolefin90130250400
“T” — Thermoplastic elastomer125150200350

Table 3. Fire hazard rating depending on sheath and insulation material*

Insulation material designationFire hazard ratingDescription of sheath and insulation material, as well as cable design type according to fire hazard rating (as per GOST 31565-2012)
Vng(B)cables with PVC plastic insulation and low-flammability PVC plastic sheath, non-flammable in group installations category V
ng(B)-LScables with insulation and sheath made of low-fire-hazard PVC plastics, non-flammable in group installations category B, with reduced smoke and gas emission
ng(B)-LSLTxcables with insulation and sheath made of low-fire-hazard PVC plastics, non-flammable in group installations category B, with reduced smoke and gas emission, and low toxicity of combustion products
ng(B)-FRLSfire-resistant cables with insulation and sheath made of low-fire-hazard PVC plastics, non-flammable in group installations category B, with reduced smoke and gas emission
ng(B)-FRLSLTxfire-resistant cables with insulation and sheath made of low-fire-hazard PVC plastics, non-flammable in group installations category B, with reduced smoke and gas emission, and low toxicity of combustion products
Png(B)-HFcables with insulation and sheath made of halogen-free polymer compositions, non-flammable in group installations category B, and do not emit corrosive gaseous combustion products
ng(B)-FRHFfire-resistant cables with insulation and sheath made of halogen-free polymer compositions, non-flammable in group installations category B, and do not emit corrosive gaseous combustion products
Psng(B)-LScables with cross-linked polyolefin insulation and low-fire-hazard PVC plastic sheath, non-flammable in group installations category B, with reduced smoke and gas emission
ng(B)-FRLSfire-resistant cables with cross-linked polyolefin insulation and low-fire-hazard PVC plastic sheath, non-flammable in group installations category B, with reduced smoke and gas emission
ng(B)-HFcables with cross-linked polyolefin insulation and halogen-free polymer sheath, non-flammable in group installations category B, and do not emit corrosive gaseous combustion products
ng(B)-FRHFfire-resistant cables with cross-linked polyolefin insulation and halogen-free polymer sheath, non-flammable in group installations category B, and do not emit corrosive gaseous combustion products
Tng(B)cables with insulation and sheath made of thermoplastic elastomers, non-flammable in group installations category B
ng(B)-FRfire-resistant cables with insulation and sheath made of thermoplastic elastomers, non-flammable in group installations category B

* – “ZG” cable (rodent-protected) is made from “P” material with “ng(C)-HF” or “ng(C)-FRHF” rating


Replacement for TFL 492 32 cable (Ericsson)

  • The diagram schematically represents the construction of the TFL 492 32 (Ericsson) cable.

    1. Multi-stranded tinned copper conductor, Class 5. Three parallel-laid strands in a single plane form a flat conductor.
    2. Insulation made of halogen-free polymer composition, flame-retardant in group installations. One conductor is insulated in gray, the other in black.
    3. Shielding with aluminum foil tape (Alumoflex).
    4. Shielding in the form of a tinned copper wire braid.
    5. Sheath made of halogen-free polymer composition, flame-retardant in group installations. The gray sheath is designed for indoor use. The “UF” version has a black sheath, resistant to solar radiation, for outdoor applications.

    The GERDA-TFL cable is a full equivalent of the TFL 492 32 cable. Table 4 provides the corresponding GERDA-TFL designation for each version of the TFL 492 32 cable.

  • GERDA-TFL schematic

Order designation

Fire hazard rating
ng(В)
ng(В)-LS
ng(В)-LSLTx
ng(В)-HF
ng(C)-HF
ng(В)-FR
ng(В)-FRLS
ng(В)-FRLSLTx
ng(В)-FRHF
ng(C)-FRHF

Conductor cross-section, mm²
2,5; 4; 6; 10; 16; 25

Tinning of copper conductors
tinned conductors
mcopper conductors

Insulation material of conductive cores
VPVC compound
Phalogen-free polymer compositions
Pscross-linked polyolefin
Tthermoplastic elastomer

Overall shield over the core of all conductors (pairs, triples, quads)
no overall shield
Ealuminum foil tape (Alumoflex)
Embraid of copper wires
Elbraid of tinned copper wires
Emfcopper foil tape
EElbraid of tinned copper wires over Alumoflex

Armor under the outer sheath
no armor
Ksolid wire armor of galvanized wires under the outer sheath
Kobraid of galvanized wires under the outer sheath

Special execution
no special execution
UFresistant to solar radiation, rain, dynamic abrasive dust impact, and frost formation
EHLresistant to extremely cold conditions (only for insulation material “P”)
Moil and gasoline resistance
Hresistant to chemically aggressive environments
ZGsheath resistant to damage by rodents, ants, and termites

GERDA-TFL

ng(B)-HF

2 x

10

P

EEl

–

UF

TU 27.32.13-044-76960731-2020

Example of cable designation when orderingDescription
GERDA-TFL ng(B)-HF 2×10 PEEl-UF
TU 27.32.13-044-76960731-2020		Flexible power cable for telecommunications equipment, with two tinned copper conductors of 10 mm² nominal cross-section, insulation and sheath made of halogen-free polymer compositions, flame-retardant in group installations according to category B, not emitting corrosive gaseous products, with an overall screen of aluminum foil tape, over which a braid of tinned copper wires is applied. The sheath is resistant to solar radiation, black in color, operating temperature range -60°…+90°C.

Table 4. Selection of an equivalent cable for TFL 49232 (Ericsson)

TFL 49232 Part no.GERDA-TFL cable designationNumber of conductors x cross-section (AWG)Nominal cable size by sheath, W x H, mmConductor electrical resistance, Ohm/km, maxConductor insulation colorSheath colorWeight, kg/km
TFL 492 322GERDA-TFL ng(B)-HF 2×2.5 PEEl2×2.5 mm² (2×14 AWG)7.3×7.08.21black, graygray100
TFL 492 324GERDA-TFL ng(B)-HF 2×6 PEEl2×6 mm² (2×10 AWG)9.4×9.43.39black, graygray193
TFL 492 324/0GERDA-TFL ng(B)-HF 2×6 PEEl-UF2×6 mm² (2×10 AWG)9.4×9.43.39black, grayblack193
TFL 492 325GERDA-TFL ng(B)-HF 2×10 PEEl2×10 mm² (2×8 AWG)10.5×11.51.95black, graygray292
TFL 492 325/0GERDA-TFL ng(B)-HF 2×10 PEEl-UF2×10 mm² (2×8 AWG)10.5×11.51.95black, grayblack292
TFL 492 326/0GERDA-TFL ng(B)-HF 2×16 PEEl-UF2×16 mm² (2×6 AWG)11.8×13.61.24black, grayblack426

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