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Routine Tests

The document outlines various routine and special tests that shall be carried out on manufactured cable lengths. Routine tests include partial discharge testing, voltage testing, and conductor resistance testing carried out on each length. Special tests include conductor examination, insulation thickness measurement, and capacitance measurement carried out on sample lengths representing batches. These special tests shall be done on 10% of lengths in a contract, rounded up. Type tests include electrical tests like bending, impulse and heating cycle tests, as well as mechanical property tests on insulation and sheaths before and after aging. Test are also specified to check cable components.

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Abdullah Al Asik
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75 views2 pages

Routine Tests

The document outlines various routine and special tests that shall be carried out on manufactured cable lengths. Routine tests include partial discharge testing, voltage testing, and conductor resistance testing carried out on each length. Special tests include conductor examination, insulation thickness measurement, and capacitance measurement carried out on sample lengths representing batches. These special tests shall be done on 10% of lengths in a contract, rounded up. Type tests include electrical tests like bending, impulse and heating cycle tests, as well as mechanical property tests on insulation and sheaths before and after aging. Test are also specified to check cable components.

Uploaded by

Abdullah Al Asik
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Routine Tests

The following routine tests shall be carried out on each manufactured length
a) Partial discharge test
b) Voltage test
c) DC voltage test on outer sheath
d) Conductor resistance test

Special (Acceptance) Tests


The following tests shall be made on samples which, for the tests in items (b) and (g), may be on
complete drum length of cable taken to represent batches
a) Conductor examination
b) Measurement of electrical resistance of conductor
c) Measurement of thickness of insulation and non-metallic sheath
d) Measurement of thickness of metallic sheath
e) Measurement of overall cable diameter
f) Hot set test for XLPE insulation
g) Measurement of capacitance

Frequency of Tests
The above special (acceptance) tests shall be made on one length from each manufacturing series of
the same type size of cable, but shall be limited to not more than 10% of the number of lengths in any
contract, rounded to upper unity.

Type Tests
At least the following tests shall be included in the type tests with results.
1. Electrical type test
a) Bending test
b) Partial discharge test
c) Heating cycle test
d) Partial discharge test
e) Impulse test
f) Voltage test for 4 h
g) Resistivity of semi-conducting screens.

2. Non Electrical type tests


a) Measurement of thickness of insulation
b) Measurement of thickness of non-metallic sheaths (including extruded separation sheaths, but
excluding inner coverings)
c) Tests for determining the mechanical properties of insulation before and after ageing
d) Tests for determining the mechanical properties of non-metallic sheaths before and after ageing
e) Additional ageing test on pieces of completed cable
f) Loss of mass test on PVC sheaths
g) Pressure test at high temperature on insulation and non-metallic sheaths
h) Test on PVC insulation and sheaths at low temperature
i) Test for resistance of PVC sheaths to cracking (heat shock test)
j) Hot set test for XLPE insulation
k) Water absorption test on insulation
l) Flame spread test on single cables
m) Shrinkage test for XLPE insulation
n) Strip ability test for insulation screen.
Test on cable components
a) Check for cable construction
b) Resistivity of semi conducting layers
c) Test for determining the mechanical properties of insulation before and after ageing
d) Test for determining the mechanical properties of non-metallic sheath before and after ageing.
e) Ageing tests on pieces of complete cable to check compatibility of materials
f) Pressure test at high temperature on sheath
g) Hot set test on XLPE insulation
h) Carbon black content of PE sheath
i) Shrinkage test on XLPE insulation

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