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Universal Optical Cables ГЕРДА-КОУ are designed for digital signals transmission at a lining in the main, local and intra-zone communication lines, as well as to connect electronic devices with the possibility of simultaneous use of digital and analog signals.
Application and design features of the cable are shown in Table 1.
For the cables are used different types of single-mode and multimode optical fibers, according to GOST R 52266-2004 (see. Table 2).
Tight buffer coating (tight buffer) of optical fiber provides a fiber strength, serves as a damping element (absorbs shock) and provides additional environmental protection for a fiber. The characteristics of the optical fibers in a tight buffer coating are presented in Table 3.
The cables are manufactured as of modular, tubular design and an optical cord.
The number of optical fibers in cables of modular design - from 2 to 144, in cables with a central tube and in optical cords - from 2 to 12.
The colouring while coating of optical fibers and optical modules allows unequivocal definition within the mounting process (see. Table 4).
ГЕРДА-КОУ cable may be manufactured in a combined design - when in one cable the electric energy (by the conductors) and optical signals (via optical fibers) are transmitted. Optical fibers may be combined with any cable of "Cable" Gerda system". The usage a combined design cable saves on cabling.
The fire safety index and working temperature of cables, depending on a insulation and jacketing material, are given in Table 5.
Table 1. Application and design features of the cable. |
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ГЕРДА-КОУ
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The cable is designed for hanging on supports of communication lines, for installation in special (protective plastic) pipes inside buildings and installations.
The number of optical fibers in the cable – up to 144.
Static stretching efforts resistance - at least 1,5kN.
Crushing load resistance - at least 3,0kN / 100cm.
On image:
- Central strength member
- String
- Optical module
- Water swelling tape
- Insulation
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 |
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ГЕРДА-КОУ-К
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The cable is designed for laying in grounds of 1-3 groups, cable ducts, tunnels, sewers, block, inside buildings and installations.
The number of optical fibers in the cable – up to 144.
Static stretching efforts resistance - at least 2,5kN.
Crushing load resistance - 4.0 kN / 100cm.
On image:
- Central strength member
- String
- Optical module
- Water swelling tape
- Separating layer
- Steel-wire armour
- Insulation
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 |
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ГЕРДА-КОУ-Б
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The cable is designed for laying in grounds of 1-3 groups, cable ducts, boxes, tunnels, sewers, inside buildings and installations.
The number of optical fibers in the cable – up to 144.
Static stretching efforts resistance - at least 2,5kN.
Crushing load resistance – at least 4,0kN / 100cm.
On image:
- Optical module
- String
- Central strength member
- Water swelling tape
- Separating insulation
- Steel corrugated tape
- Jacketing
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 |
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ГЕРДА-КОУ-Кв
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The cable is designed for hanging on the air lines supports, in special pipes, tunnels, sewers, while electric field exposure.
The number of optical fibers in the cable – up to 144.
Static stretching efforts resistance - at least 3kN.
Crushing load resistance – at least 3,0kN / 100cm.
On image:
- Central strength member
- String
- Optical module
- Water swelling tape
- Separating insulation
- Aramid threads
- Jacketing
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ГЕРДА-КОУ-Тр
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The cable is designed for hanging on supports of communication lines, public lighting lines, between buildings, at contact network of railways and on power lines supports at the points with the maximum value of potential of up to 12 kV, on bridges and overpasses.
The number of optical fibers in the cable – up to 144.
Static stretching efforts resistance - at least 3kN.
Crushing load resistance – at least 3,0kN / 100cm.
On image:
- Hanging element
- Insulation
- Water swelling tape
- Optical module
- String
- Central strength member
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 |
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ГЕРДА-КОУ-Т
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The cable is designed for installation inside buildings, to use in local area computer networks as a distribution fiber optic cable.
The number of optical fibers in the cable – up to 12.
Static stretching efforts resistance - at least 1,0kN.
Crushing load resistance – at least 2,0kN / 100cm.
On image:
- Central tube
- Optical fiber
- Insulation
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ГЕРДА-КОУ-ТК
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The cable is designed for laying in grounds of 1-3 groups, cable ducts, tunnels, sewers, blocks, inside buildings and installations.
The number of optical fibers in the cable - 12.
Static stretching efforts resistance - at least 2,5kN.
Crushing load resistance – at least 3,0kN / 100cm.
On image:
- Optical fiber
- Central tube
- Steel-wire armour
- Hydrofobic filling
- Insulation
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ГЕРДА-КОУ-ТБ
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The cable is designed for laying in grounds of 1-3 groups, cable ducts, blocks, tunnels, sewers, inside buildings and installations.
The number of optical fibers in the cable - 12.
Static stretching efforts resistance - at least 2,5kN.
Crushing load resistance – at least 4,0kN / 100cm.
On image:
- Central tube
- PET-E tape
- Separating isulation
- Corrugated steel tape
- Jacketing
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ГЕРДА-КОУ-ТКв
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The cable is designed for installation outdoors and inside buildings, at tunnels, sewers and as of electric field exposure.
Static stretching efforts resistance - at least 3kN.
Crushing load resistance – at least 3,0kN / 100cm.
On image:
- Optical fiber
- Central tube
- Aramid threads
- Jacketing
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 |
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ГЕРДА-КОУ-ТТр
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The cable is designed for hanging on supports of communication lines, at contact network of railways, public lighting poles, between buildings and installations, on power line supports in the points with the maximum value of potential of up to 12 kV, on bridges and overpasses.
The number of optical fibers in the cable - 12
Static stretching efforts resistance - at least 3,0kN.
Crushing load resistance – at least 3,0kN/100cm.
On image:
- Hanging element
- Jacketing
- Optical fiber
- Optical module
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Combined cable
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The cable is designed for the simultaneous transmission of electrical energy and optical signals.
Insulated strend can be maintained to all grades of modular cable design, except cables of ГЕРДА-КОУ-Кв (Кс, Кв2, Кс2).
Static stretching resistance and cracking stress resistance is set according to the cable brands.
On image:
- Optical module
- Insulated copper strend
- Central strength member
- String
- Water swelling tape
- Jacketing
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ГЕРДА-КОУ-Ш
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The cable is designed for the manufacture of lightweight cords, for installation inside buildings and equipment, in cable ducts wells, sewers, tunnels, on suspension.
Resistance to static stretching efforts - at least 1 kN.
Crushing load resistance - 0.2 kN / 100cm.
On image:
- Optical fiber
- Buffer coating
- Aramid threads
- Jacketing
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Table 2. Characteristics of the optical fibers. |
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Characteristic
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Optical fiber type.
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МГ1
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МГ2
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Е1
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Е2
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Е3
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Е4
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Е5
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1. Mode field diameter, microns:
λ = 1310 nm.
λ = 1550 nm.
|
-
-
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-
-
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8,6-9,5
-
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-
9,5-13,0
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-
8,6-9,5
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-
7,8-8,5
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-
8,0-11,0
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2. Cutoff wavelength, λcc,
nm.
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-
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-
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≤ 1260
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≤ 1530
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≤ 1260
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≤ 1260
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≤ 1480
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3. The attenuation coefficient at the reference wavelength, dB / km:
λ = 850 nm.
λ = 1300 nm.
λ = 1310 nm.
λ = 1550 nm.
λ = 1625 nm.
λ = 1383 nm.
λ = 1460 nm.
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2,4-3,5
≤ 0,7
-
-
-
-
-
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2,8-3,5
≤ 0,8
-
-
-
-
-
|
-
-
≤ 0,36
≤ 0,22
-
≤ 0,35
-
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-
-
-
≤ 0,20
-
-
-
|
-
-
-
≤ 0,22
≤ 0,25
-
≤ 0,40
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-
-
-
≤ 0,22
-
-
-
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-
-
-
≤ 0,22
≤ 0,25
-
-
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4. The numerical aperture
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0,200
± 0,015
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0,275
± 0,015
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-
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-
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-
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-
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-
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5. Spread spectrum factor
MHz ⋅ km
λ = 1300 nm.
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≥ 500
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≥ 500
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-
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-
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-
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-
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-
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6. Chromatic dispersion coefficient,
ps/nm ⋅ km:
λ = (1285-1330) nm.
λ = (1525-1575) nm.
λ = (1530-1565) nm.
|
-
-
-
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-
-
-
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≤ 3,5
≤ 18
-
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-
≤ 20
-
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-
-
1,0-14,0
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-
≤ 3,5
-
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-
-
±(0,1-10,0)
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7. Dispersion slope in
the zero dispersion
wavelength,
ps/nm2 ⋅ km:
λ = (1285-1330) nm.
λ = (1525-1575) nm.
|
-
-
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-
-
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≤ 0,093
-
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-
≤ 0,06
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-
-
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-
≤ 0,085
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-
-
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Table 3. Characteristics of the optical fibers in a tight buffer coating |
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The parameters of the optical fiber
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Optical fiber type
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МГ1
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МГ2
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Е1
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1. Mode field diameter, microns.:
λ = 1310 nm.
λ = 1550 nm.
|
-
-
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-
-
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9,2 ± 0,4
10,4
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2. Cutoff wavelength, λcc, nm.
|
-
|
-
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≤ 1260
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3. The damping coefficient on the reference wavelength, dB / km:
λ = 850 nm.
λ = 1300 nm.
λ = 1310 nm.
λ = 1550 nm.
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≤ 3,5
≤ 1,25
-
-
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≤ 3,5
≤ 1,25
-
-
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-
-
≤ 0,8
≤ 0,5
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4. The numerical aperture
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0,200
±0,015
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0,275
±0,015
|
-
|
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5. spread spectrum factor MHz⋅km
λ = 850 nm.
λ = 1300 nm.
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≥ 400
≥ 400
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≥ 160
≥ 500
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-
-
|
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6. Chromatic dispersion coefficient, ps/nm⋅km:
λ = (1285-1330) nm.
λ = (1525-1575) nm.
|
-
-
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-
-
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≤ 3,5
≤ 18
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7. Tilt dispersion characteristics
wavelength region of zero dispersion ps/(nm2⋅km), not more:
|
-
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-
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≤ 0,092
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| Table 4. The colors of optical fibers and optical modules |
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The sequence number of the optical fiber or optical module
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Color
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1
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Unpainted
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2
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Red
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3
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Yellow
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4
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Blue
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5
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Brown
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6
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Gray
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7
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Orange
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8
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Green
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9
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Black
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10
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Purple
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11
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Pink
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12
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Turquoise
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| Table 5. Fire safety index and working temperature depending on the jacketing material |
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Sign of insulation material
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Fire Safety Index
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Material of insulation (core insulation for all the cables – cross-linked polyolefin)
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Working Temperature, °С
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П
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-
(no index)
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polyethylene
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-40°...+60°С *
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В
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нг(A)
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PVC compounds of low flammability
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-50°...+70°С *
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нг(A)-LS
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PVC compounds of low flammability with low smoke and gas emission
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-50°...+70°С *
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нг(A)-FRLS
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PVC compounds with low smoke and gas emission, flame retardant cable
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-50°...+70°С *
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нг(A)-HF
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halogen-free polymeric compositions
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-50°...+70°С *
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нг(A)-FRHF
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halogen-free polymeric compositions, flame-retardant cable
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-50°...+70°С *
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Т
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нг(A)
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low flammability thermoplastic elastomers
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-60°...+125°С
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нг(A)-FR
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low flammability thermoplastic elastomers, flame-retardant cable
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-60°...+125°С
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* The cables may be made in cold-resistant performance of "ХЛ" with operating temperatures from -60 °C
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