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eLibrary > 22/30451543 DC BS 7870-2. LV and MV polymeric insulated cables for use by distribution and generation utilities - Part 2. Methods of test (Implementation of HD 605 S3:2019) >

22/30451543 DC BS 7870-2. LV and MV polymeric insulated cables for use by distribution and generation utilities - Part 2. Methods of test (Implementation of HD 605 S3:2019), 2022

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22/30451543 DC BS 7870-2. LV and MV polymeric insulated cables for use by distribution and generation utilities - Part 2. Methods of test (Implementation of HD 605 S3:2019), 2022

30451543
30451543 -1 [Go to Page]
Introduction
1 Scope
2 Normative references
3 Terms and deﬁnitions
4 Sampling
5 Tests conditions [Go to Page]
5.1 Ambient temperature [Go to Page]
5.2 Tolerance on temperature values
5.3 Frequency and waveform of power-frequency test voltages
5.4 Pre-conditioning
6 Rounding of numbers
7 Non-electrical tests [Go to Page]
7.1 Dimensional measurements [Go to Page]
7.1.1 Measurement of insulation thickness [Go to Page]
7.1.1.1 Procedure
7.1.1.2 Evaluation of results
7.1.2 Measurement of non-metallic sheath thickness [Go to Page]
7.1.2.1 Procedure
7.1.2.2 Evaluation of results
7.1.3 Measurement of cable dimensions [Go to Page]
7.1.3.1 Measurement of overall dimensions
7.1.3.2 Measurement of ovality
7.1.4 Measurement of wires, strips and tapes [Go to Page]
7.1.4.1 Wires, strips and tapes for armour [Go to Page]
7.1.4.1.1 Round wires
7.1.4.1.2 Metallic tapes thickness
7.1.5 Measurement of thickness of metallic sheath [Go to Page]
7.1.5.1 Strip method
7.1.5.2 Ring method
7.1.6 Check of application of screen or armour tapes, or wires [Go to Page]
7.1.6.1 Method 1
7.1.6.2 Method 2
7.1.7 Method for inspection for protrusions, contaminants and discoloured particles in cross-linked polyethylene cable (XLPE) insulation [Go to Page]
7.1.7.1 Sample preparation
7.1.7.2 Test method to determine discontinuities
7.1.7.3 Test method to determine contaminants and discoloured particles
7.1.8 Thickness of semi-conducting layers
7.2 Mechanical tests on non-metallic components [Go to Page]
7.2.1 Determination of tear resistance of the protective sheath [Go to Page]
7.2.1.1 Principle [Go to Page]
7.2.1.1.1 Preparation of test pieces
7.2.1.1.2 Conditioning of test pieces
7.2.1.1.3 Procedure
7.2.1.1.4 Evaluation of results
7.2.2 Strippability test on extruded semi-conducting insulation screen
7.2.3 Insulation screen cutting test
7.2.4 Water immersion test on sheath [Go to Page]
7.2.4.1 Principle
7.2.4.2 Sampling and preparation of test pieces
7.2.4.3 Procedure
7.2.4.4 Evaluation of results
7.3 Non-electrical tests on samples of complete cable [Go to Page]
7.3.1 Bend tests for complete cable [Go to Page]
7.3.1.1 Standard bend test for complete cable
7.3.1.2 Cold bend test
7.3.2 Abrasion test
7.3.3 Water penetration test method [Go to Page]
7.3.3.1 Principle
7.3.3.2 Sample
7.3.3.3 Test
7.3.3.4 Inspection of tested cable samples
7.3.4 Special compatibility test
7.3.5 Determination of UV stability of MDPE sheath [Go to Page]
7.3.5.1 Principle
7.3.5.2 Method of exposure to UV
7.3.5.3 Test requirement
7.4 Physical and chemical tests [Go to Page]
7.4.1 Checking durability of colours and marking
7.4.2 Swell height of water blocking tape
7.4.3 Measurement of water content of insulation [Go to Page]
7.4.3.1 Equipment calibration
7.4.3.2 Test procedure
8 Electrical tests [Go to Page]
8.1 Electrical resistance [Go to Page]
8.1.1 Conductors
8.2 Voltage tests [Go to Page]
8.2.1 Tests on complete cable [Go to Page]
8.2.1.1 Single core cables
8.2.1.2 Multicore cables
8.2.2 Tests on oversheath
8.2.3 Impulse voltage test followed by a.c. voltage test
8.2.4 Special four-hour voltage test
8.3 Insulation resistance tests [Go to Page]
8.3.1 Insulation resistance test on insulated cores
8.3.2 Insulation resistance test on screened or armoured complete cable
8.3.3 Oversheath resistance test on screened or armoured complete cable
8.4 Spark tests
8.5 Heating cycle test
8.6 Measurement of the electrical resistivity of the semi-conducting screens
8.7 Partial discharge test
8.8 Tan δ measurement [Go to Page]
8.8.1 Tan δ test in relation to temperature
8.8.2 Tan δ test as a function of voltage
The corrected values shall be used as the result of this test.
8.9 Adherence of screens at short circuit temperature [Go to Page]
8.9.1 Requirement
8.9.2 Method
8.9.3 Resistivity test for water blocking tape
9 Long-term tests for resistance to water [Go to Page]
9.1 Principle
9.2 Approval
9.3 Test method [Go to Page]
9.3.1 Cable core length
9.3.2 Conditioning
9.3.3 Ageing procedure
9.3.4 Ageing assessment [Go to Page]
9.3.4.1 Sample preparation
9.3.4.2 Power-frequency voltage step test
9.3.4.3 Cable and termination failures [Go to Page]

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22/30451543 DC BS 7870-2. LV and MV polymeric insulated cables for use by distribution and generation utilities - Part 2. Methods of test (Implementation of HD 605 S3:2019), 2022

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please select your company type below: