Iec 60794 3 30 2008

Optical fibre cables – Part 3-30: Outdoor cables – Family specification for optical telecommunication cables for lakes, river crossings and coastal application Câbles à fibres optiques

Optical fibres

Single-mode dispersion unshifted (B1.1) optical fibre

(cabled fibres) 5.2 According DS IEC 60793-1-40 at 1 310 nm at 1 550 nm at 1 625 nm

≤ 0,40 dB/km 1 625 nm performance is optional depending on agreement between customer and supplier

Attenuation discontinuities at 1 310 and 1 550 nm

LICENSED TO MECON Limited - RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY, SUPPLIED BY BOOK SUPPLY BUREAU.

Cabled fibre cut-off wavelength

Fibre colouring 5.4 IEC 60304 Visual inspection

5.2 According DS IEC 60793-1-40 at 1 550 nm at 1 625 nm

Attenuation discontinuities at 1 310 and 1 550 nm

Cabled fibre cut-off wavelength 5.3 λ cc < λoperational IEC 60793-1-44

5.2 According DS IEC 60793-1-40 at 1 310 at 1 383 +/- 3 nm at 1 550 at 1 625 nm

Attenuation discontinuities at 1 310 and 1 550 nm 5.2.2 ≤ 0,10 dB IEC 60793-1-40

Single-mode dispersion shifted (B2) optical fibre

(cabled fibres) 5.2.1 According DS IEC 60793-1-40 at 1 550 nm 5.2.1 ≤ 0,30 dB/km

Single-mode non-zero dispersion (B4) optical fibre

5.2 According DS IEC 60793-1-40 at 1 550 nm at 1 625 nm

Single-mode non-zero dispersion shifted (B5) optical fibre

5.2.1 According DS IEC 60793-1-40 at 1 460 nm at 1 550 nm and at 1 625 nm

≤ 0,40 dB/km 1625 nm performance is optional depending on agreement between customer and supplier

Cable element

Compatibility 6 According DS Under consideration

Slotted core 6.3 According DS Visual inspection

Visual inspection IEC 60794-1-2 Methods E14 and E15 IEC 60811-1-1

Ribbon 6.5 According DS Visual inspection

Insulated copper conductor According DS

Central strength member According DS

Installation and operating conditions

8.1 Agreement between customer and supplier

Bend test 8.2.1.2 According DS IEC 60794-1-2

Tube kinking 8.2.2.1 According DS IEC 60794-1-2

- Separability of individual fibres from a ribbon

IEC 60794-1-2 Method G5 or according DS

- Ribbon stripping 8.2.3.2.2 According DS According DS

Mechanical and environmental tests )

Tests applicable

Tensile performance 9.1 See 4.4.2.1 and according DS

- Finished cable 9.6.2 Under consideration IEC 60794-1-2

Water penetration 9.7 Under consideration IEC 60794-1-2

Details on family requirements and test conditions for optical fibre

The term "no change in attenuation" indicates that any variation in measurement values, whether positive or negative, falling within the measurement uncertainty should be disregarded For this standard, the measurement uncertainty for attenuation must be less than 0.05 dB.

Under long-term tensile load (T L), the fiber strain must remain below 20% of the fiber proof strain, with no change in attenuation during testing For installation load (T M), the fiber strain should not exceed 60% of the fiber proof strain, and any changes in attenuation during the test must be measured and documented Additional criteria may be established through agreement between the customer and the supplier.

Under visual examination without magnification there shall be no damage to the sheath or to the cable elements b) Test conditions

Cable length under tension: not less than 50 m Taking into account the measurement accuracy and end effects, shorter lengths may be used by agreement between the customer and the supplier

Fibre length: finished cable length

Tensile load on cable: long term tensile load (T L ) and installation load (T M ) Other loads may be applied in accordance with particular user conditions

T L design water depth × weight of cable in water (N)

T M ≥ 2,5 × design water depth × weight of cable in water (N)

Diameter of test pulleys: 1 m but not less than the minimum loaded bending diameter specified for the cable

Under visual examination without magnification there shall be no damage to the sheath and to the cable elements b) Test conditions

Bending radius: 20 d to 30 d for general use

Load: sufficient to keep the cable in place during the test

There shall be no change in attenuation at 1 550 nm after the test For 1 625 nm applications, performance criteria shall be mutually agreed upon between the customer and supplier

Visual inspection without magnification should reveal no damage to the sheath or cable elements, and any imprint from the striking surface on the sheath is not classified as mechanical damage.

Striking face radius: 10 mm to 300 mm

Diameter of steel base: > 50 mm

Number of impacts: 3 in 3 different locations spaced not less than 500 mm apart

There shall be no change in attenuation at 1 550 nm after the test For 1 625 nm applications, performance criteria shall be mutually agreed upon between the customer and the supplier

The same acceptance criteria shall apply when the bend test is carried out at low temperature in accordance with particular user conditions b) Test conditions

Diameter of mandrel: minimum cable bending diameter

Number of cycles: 3 to 6 depending on user requirements

Under load there shall be no increase in attenuation in the 1 550 nm region For 1 625 nm applications, performance criteria shall be mutually agreed upon between the customer and supplier

Under visual examination there shall be no damage to the sheath or to the cable elements

The imprint of the plate or mandrel on the sheath is not considered mechanical damage

NOTE It is recommended that additional testing considerations, such as the number of positions that the load is applied to the test specimen are defined b) Test conditions

Load (plate/plate): > 10 kN and/or

For wavelengths from T A1 to T B1, the attenuation at 1,550 nm will remain unchanged For applications at 1,625 nm, the performance criteria must be agreed upon by both the customer and the supplier The ambient temperature serves as the reference temperature for testing.

For T A1 to T A2 and T B1 to T B2 , the change in attenuation coefficient shall be lower than

The attenuation measured is 0.15 dB/km at a wavelength of 1,550 nm, and upon completion of the test, there should be no change in attenuation For applications at 1,625 nm, the performance criteria will be established through mutual agreement between the customer and the supplier.

Sample length: finished cable length of at least 1 000 m

High temperature, T B2 : + 60 °C to + 70 °C depending on user requirements

High temperature, T B1 : + 30 °C to + 60 °C depending on user requirements

Low temperature, T A2 : – 10 °C to – 40 °C or – 45 °C, depending on user requirements

Rate of heating and cooling: sufficiently slow so that the effect of changing the temperature does not cause temperature shock t 1 : temperature cycling test dwell time

Number of cycles: 2, but additional cycles may be required in accordance with particular user requirements.

Under visual examination without magnification, there shall be no damage to the sheath or to the cable elements b) Test conditions

Length: to be agreed between the customer and the supplier

Pressure: 110 kPa × (maximum water depth, in m) / 10

The cable shall form a smooth circle and stay in contact with the ground all the way around the circumference b) Test conditions

Diameter: minimum specified coiling diameter

Temperature: 10 °C + 5 °C unless otherwise agreed between the customer and the supplier

4.4.2.10 Bending under tension 14H a) Family requirements

Under load, there shall be no change in attenuation at 1 550 nm after the test For

1 625 nm applications, performance criteria shall be mutually agreed upon between the customer and the supplier

Under visual examination without magnification there shall be no damage to the sheath or to the cable elements

NOTE The examination may be limited to the cable length in contact with the roller radius surface b) Test conditions

Roller radius: > than the minimum bending radius of the cable

Family specification for optical telecommunication cables to be used in lakes, river crossings and coastal application

(Blank detail specification and minimum requirements) –

(3) Available from: (4) Generic specification: IEC 60794-1-1; IEC 60794-1-2

- Central (strength) member – non metallic

- Core filling – regular water blocking

- Core filling – water swellable materials

Minimum bending radius for no load bending

Minimum bending radius for rated load bending

Lay-up 7.2 According DS Visual inspection

Method E14 or IEC 60811-5-1, Clause 4 IEC 60811-5-1, Clause 5 IEC 60811-5-1, Clause 8

- Overlap 5.3 of IEC 60708 or DS

Steel needle diameter d = 1,0 mm load: 4 N

Wool or rayon felt, weight

Sheath abrasion resistance 9.2.8 According DS IEC 60794-1-2, Method E2A

BDS for ISO/IEC 24702 applications (MICE)

C.1 Additional requirements for industrial premises

Cables designed for installation in accordance with ISO/IEC 24702 and related standards may necessitate additional testing to confirm their appropriateness for the specific environments outlined by Mechanical, Ingress, Climatic, and Chemical factors.

Electromagnetic (MICE) classification For supplemental guidance, see IEC 62363 Required tests may be selected from table below

C.2 Applicable additional specifications for industrial premises installations as defined in ISO/IEC 24702

Characteristics MICE Classification of ISO/IEC 24702 and related standards

Peak acceleration 40 ms -2 100 ms -2 250 ms -2 IEC 60721-3-3

1,5 mm 7,0 mm 15,0 mm IEC 60721 series

5 ms -2 20 ms -2 50 ms -2 IEC 60721 series

Tensile force (see a) As required As required As required IEC 60794-1-2

Crush Requirement above converted to requirement for IEC plate/plate test

Requirement above converted to requirement for IEC plate/plate test

Method E4 Bending (see a) As required As required As required IEC 60794-1-2

Method E6 Flexing (see a) As required As required As required IEC 60794-1-2

Method E8 Torsion (see a) As required As required As required IEC 60794-1-2

Characteristics MICE Classification of ISO/IEC 24702 and related standards

(ambient and rate of change)

Solar radiationc 700 Wm -2 1 120 Wm -2 1 120 Wm -2 IEC 60721-1

Sodium chloride (salt/sea water)c

(for oil types see Note 1)

Sodium stearate (soap)b None > 5 × 10 4 aqueous non-gelling

Gaseous pollution contaminantsd Mean/Peak

Mean/Peak Concentration × 10 -6 Hydrogen sulphideb < 0,003 / < 0,01 < 0,05 / < 0,5 < 10 / < 50 IEC 60654-4

Sulphur trioxideb (ffs) < 0,01 / < 0,03 < 0,1 / < 0,3 < 5 / < 15 IEC 60654 series

Chlorine dry (< 50 % humidity)c < 0,002 / < 0,01

Tiêu đề	Optical fibre cables – Part 3-30: Outdoor cables – Family specification for optical telecommunication cables for lakes, river crossings and coastal application
Chuyên ngành	Electrical and Electronic Technologies
Thể loại	standard
Năm xuất bản	2008

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Số trang	50
Dung lượng	1,03 MB