in case of printing, the print height shall be 15% of the specified overall diameter as a minimum. The number shall be printed in a colour which contrasts with the oversheath colour.
Compliance shall be checked by visual examination and measurement.
2.3 Additional test requirements
Sampling for sample tests
(a) Electrical resistance of the conductor
The electrical resistance of the conductor shall be checked on 20% of the finished lengths or on five lengths, whichever is greater. The measurement shall be made on each conductor up to a maximum of five of each length of cables selected for the test.
(Ы Insulation resistance on cable length
The insulation resistance shall be measured on 10% of the finished lengths or on 3 lengths, whichever is greater. The measurement shall be made on each core up to a maximum of two of each length of cable selected for the test.
Bending test
The bending test shall be performed on samples taken from the finished lengths on the following basis:
Cable length
Above Up to and including Number of samples (km) (km)
0 2 1
2 5 1
5 10 2
10 30 3
30 - 4
Note: 1. In calculating the above mentioned lengths it is permitted to assemble cables with different cross-sections.
2. If the total length in the contract does not exceed 2 km, it is permitted to omit the test provided the manufacturer can demonstrate to have successfully performed the test on at least one similar cable sample on the occasion of previous contracts.
Construction, marking and dimensions
The construction, marking and dimensional checks shall be performed on 5% of the finished lengths, rounded upwards.
Checks relevant to cores shall be limited to three cores of each length of cable selected for the test for cables with up to and including 10 cores, and to four cores for cables with more than 10 cores.
Physical tests, insulation resistance at high temperature, water absorption
Physical tests, insulation resistance at high temperature and water absorption test shall be performed on samples taken from the finished lengths on the following basis:
Cable length
Above Up to and including Number of samples
(km) (km)
0 2 1
2 10 1
10 - 2
Note: 1. In calculating the above mentioned lengths it is permitted to assemble cables with different cross-sections.
2. If the total length in the contract does not exceed 2 km, it is permitted to omit the test provided the manufacturer can demonstrate to have successfully performed the test on at least one similar cable sample on the occasion of previous contracts.
The purchaser may wholly or partly omit the tests even in case of delivered lengths greater than 2 km, when providing reliable results of tests carried out on the occasion of previous contracts.
The test pieces required for the physical tests on insulation shall be taken at random from different cores.TABLE 3: SCHEDULE OF TESTS
|
1 |
2 |
3 |
4 |
5 |
|
Ref. |
Test |
Category |
Test method |
Requirement given |
|
No. |
|
of Test |
described in |
in clause (3) |
|
1. |
Electrical Tests |
|
|
|
|
1.1 |
Conductor resistance |
S |
HD 383 |
3.3.1 |
|
1.2 |
Screen resistance (only for cable lengths higher than Б0 m) |
S |
HD 605 3.1.4.1 |
4.3.4 |
|
1.3 |
Voltage test on complete cable |
R |
HD 605 3.2.1 |
2.3.5 |
|
1.4 |
Insulation resistance tests: |
|
|
|
|
|
(a) Core |
S |
HD 605 3.3.1 |
2.3.6 |
|
|
(bl Complete cable |
S |
HD 605 3.3.3 |
2.3.6 |
|
2. |
Constructional and dimensional characteristics |
|
|
|
|
2.1 |
Conductor: |
|
|
|
|
|
- Material & construction |
S |
Visual examination |
3.3.1 & 4.3.1 |
|
2.2 |
Insulation: |
|
|
|
|
|
(a) Application |
S |
Visual examination |
Part 1, 5.2.2 |
|
|
|
|
HD 605, 2.1.1 |
3.3.2, 4.3.2 & |
|
|
(Ы Thickness |
S |
|
Part 1, 5.2.3 |
|
|
|
S |
Visual examination |
2.1 & Part 1,4 |
|
2.3 |
Core identification |
|
& measurement |
|
|
2.4 |
Screen |
|
|
|
|
|
- Application |
s |
HD 605, 2.1.6.2 |
2.3.2 |
|
2.Б |
Oversheath |
|
|
|
|
|
(a) Application |
s |
Visual examination |
3.3.4, 4.3.4 & Part 1, |
|
|
(b) Thickness |
s |
HD 605, 2.1.2 |
5.7.2 |
|
2.6 |
Cable markings |
s |
Visual examination & measurement |
2.2 & Part 1,3 |
|
2.7 |
Cable dimensions: |
|
|
|
|
|
(a) Overall dimension |
s |
HD 605, 2.1.3.1 |
2.3.3 |
|
|
(b) Ovality |
s |
HD 605, 2.1.3.2 |
2.3.3 |
|
3. |
Mechanical & physical tests |
|
|
|
|
3.1 |
Insulation: |
|
|
|
|
|
(a) Mechanical properties in the state as delivered |
s |
Table 1 |
3.3.2 & 4.3.2 |
TABLE 3: (concluded)
|
1 |
2 |
3 |
4 |
Б |
|
Ref. |
Test |
Category of |
Test method |
Requirement given in |
|
No. |
|
Test |
described in |
clause (*) |
|
|
(b) Mechanical properties after ageing in air oven |
S |
Table 1 |
3.3.2 & 4.3.2 |
|
|
(c) Heat shock test |
S |
Table 1 |
3.3.2 & 4.3.2 |
|
|
(d) Pressure at high temperature |
S |
Table 1 |
3.3.2 & 4.3.2 |
|
|
(e) Bending test at low temp. |
S |
Table 1 |
3.3.2 & 4.3.2 |
|
|
(fI Elongation test at low temp. |
s |
Tabei 1 |
3.3.2 & 4.3.2 |
|
|
(g) Water absorption |
|
|
|
|
|
- gravimetric (standard method) |
s |
Table 1 |
3.3.2 & 4.3.2 |
|
|
- electric (only on agreement between |
|
|
|
|
|
manufacturer and purchaser) |
s |
Table 1 |
3.3.2 & 4.3.2 |
|
3.2 |
Oversheath: |
|
|
|
|
|
(a) Mechanical properties in the state as |
|
|
|
|
|
delivered |
s |
Table 2 |
3.3.4 & 4.3.Б |
|
|
(b) Mechanical properties after ageing in air |
|
|
|
|
|
oven |
s |
Table 2 |
3.3.4 & 4.3.5 |
|
|
(c) Heat shock test |
s |
Table 2 |
3.3.4 & 4.3.5 |
|
|
(d) Pressure test at high temp. |
s |
Table 2 |
3.3.4 & 4.3.Б |
|
|
(e) Bending test at low temp. |
s |
Table 2 |
3.3.4 & 4.3.5 |
|
|
(f) Elongation test at low temp. |
s |
Table 2 |
3.3.4 & 4.3.5 |
|
|
(g) Impact test at low temp. |
s |
Table 2 |
3.3.4 & 4.3.5 |
|
4. |
Bend test on complete cable |
s |
HD 605, 2.4.1.1 |
2.3.4 |
|
5. |
Tests related to fire conditions on complete cable |
|
|
|
|
|
- Flame propagation on bunched cables in the state as delivered |
T |
HD 606, 4.1.3 |
2.3.7 |
SECTION D ! CABLES WITH COPPER OR ALUMINIUM ROUND OR
SECTOR-SHAPED CONDUCTORS AND A CONCENTRIC CONDUCTOR
Replace pages 3-D-5 and 3-D-11 by the following:'BLANK PAGE'
2.4.2.4 Voltage test on completed cable
When the cable is tested in accordance with HD 605, subclause 3.2.1, the test voltage shall be 3.5 kV AC and the duration five minutes. Alternatively the test voltage may be 15 kV DC and the duration one minute.
No breakdown shall occur.
Insulation resistance
When the cable cores are tested in accordance with sub-clause 3.3.1 of HD 605 at 70°C the volume resistivity shall not be less than 1010 Dem.
Tests related to fire conditions
This is a type test which shall be performed on the cable with the smallest conductor cross-section of the cable type to be covered by the test and, when appropriate, on the cable with the smallest number of cores. When testing cables in accordance with HD 405.3 separate tests shall be made for cables with conductor cross-sections up to and including 35mm2 and for cables with conductor cross-sections greater than 35mm2, if such cross-sections are to be covered by the type test. If materials or designs of the cable type to be tested varies with the conductor cross-section or with the number of cores or if there are other deviations within the type series, then the different designs have to be tested separately.
The complete cable shall meet the following fire propagation test requirements:
Single core cables with conductor cross-sections of all sizes and multi-core cables with conductor cross-sections up to and including 16mm2.
When tested according to HD 405.1 the requirements for the test method shall be met.
Multi-core cables with conductor cross-sections exceeding 16mm2.
When tested according to HD 405.3 the requirements for Category В shall be met.
Cables without metallic covering
Not applicable.
Cables with metallic covering
Code designation
(Under consideration by TC20.)
Rated voltage
0.6/1 kV.Construction
The range of allowed combinations of conductor cross-section, number of conductors, conductor shape and conductor material is shown in Table 5. Preferred combinations are shown in Table 3 for copper conductors and in Table 4 for aluminium conductors.
Conductor
All insulated conductors in the cable shall have the same resistance and be of the same construction. The cross-section, shape, material and number of conductors shall be within the limits given in Table 5.
Copper conductors shall be annealed, round or sector shaped and with resistance and construction in accordance with HD 383, class 1 or class 2 (see Tables 3 and 5}.
Aluminium conductors shall be annealed, round or sector shaped and with resistance and construction in accordance with HD 383, class 2 (see Table 4 and 5).
Insulation
The insulation shall be polyvinyl chloride compound Type DIV 11 complying with the requirements given in Table 1 and in sub-clause 2.4.3.
The nominal thickness of the insulation shall comply with the value specified in Table 6.
To prevent moisture penetration in joints, the insulation on the plain faces of a sector shaped conductor may not curve in.
Assembly of cores, inner covering and fillers
The cores in multi-core cables shall be cabled, helically or oscillating, with an average length of lay not more than 50 times the diameter over the cabled cores.
In multi-core cables with round conductors an extruded covering shall be applied over the laid-up cores and substantially fill the interstices between the cores. As an alternative a lapped inner covering is permitted when the interstices are substantially filled by separate filler strings.
In multi-core cables with sector shaped conductors a lapped inner covering shall be applied over the laid-up cores. As an alternative an extruded inner covering is permitted. In the latter case a helically applied tape, lapped or in open helix, may be applied over the laid-up cores.
The material used for inner coverings and fillers shall be suitable for the operating temperature of the cable and compatible with and not sticking to adjacent materials.
The nominal thickness of extruded inner coverings shall be in accordance with Table 7. The approximate thickness of lapped coverings shall be 0.4mm for diameters over the laid-up cores up to and including 40mm and 0.6mm for larger diameters. The thickness of extruded or lapped inner covering need not be checked by measurement
.Table 2 - Schedule of tests
|
1 |
2 |
3 |
4 |
5 |
|
Ref No |
Test |
Category of test |
Test method described in: |
Requirement given in clause * |
|
1 |
Electrical tests |
|
|
|
|
1.1 |
Resistance of conductors inc. concentric conductor |
S, T |
HD 605, 3.1.1 |
4.3.1 & 4.3.4 |
|
1.2 |
Voltage test on oversheath |
T |
HD 605, 3.2.3.1 |
2.4.2.1 |
|
1.3 |
Voltage test on cores |
T |
HD 605, 3.2.2.2 |
2.4.2.2 |
|
1.4 |
Spark test on sheath |
R |
HD 21.2, 2.6.1 |
2.4.2.3 |
|
1.5 |
Voltage test on completed cable |
R |
HD 605, 3.2.1 |
2.4.2.4 |
|
1.6 |
Insulation resistance test on cores at 70°C |
T |
HD 605, 3.3.1 |
2.4.3 |
|
2 |
Provisions covering constructional & dimensional characteristics |
|
|
|
|
2.1 |
Conductor material & construction |
S, T |
HD 605, 2,1.4 |
Part 1, 5.1 |
|
2.2 |
Insulation: a) application |
s, T |
Visual examination |
4.3.2 & Part 1, 5.2.2 |
|
|
b) thickness |
S. T |
HD 605, 2.1.1 |
4.3.2 & Part 1, 5.2.3 |
|
2.3 2.4 |
Core identification Laid up cores and concentric conductor |
s, T S, T |
Visual examination & measurement Visual examination & measurement |
2.1 & Part 1,4 4.3.3 & 4.3.4 |
|
2.Б |
Oversheath thickness |
S, T |
HD 605, 2.1.2 |
Part 1, 5.6.3 |
|
2.6 3 |
Cable markings Mechanical properties |
R |
Visual examination & measurement |
2.3.8 2.3 & Part 1, 3.1 |
|
3.1 |
Insulation |
T |
Table 1 |
4.3.2 |
|
3.2 |
Oversheath |
T |
Table 1 |
4.3,5 |
|
4 |
Compatibility test |
T |
Table 1 |
Table 1 |
|
5 |
Test related to fire conditions |
|
|
|
|
5.1 |
Complete cable |
T |
HD 405.1 & HD 405.3 |
2.4.4 |
