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Site Acceptance Tests On Cable Systems

AC HIGH VOLTAGE RESONANT TEST
 
AC resonant test systems of variable frequency have proven efficiency and reliability in on site testing of HV cable systems. For this, EMELEC is equipped with an AC high voltage unit for the on site testing of XLPE insulated cables, cable accessories and gas insulated switch gear transmission lines(GIS). Since the system is PD free, it can be combined with partial discharge measurement. The test set up has a capability of testing with rated voltage of 400kV. It is also possible to test short cables with capacitance magnitudes below 10 nF by using additional coupling capacitor.
 
 
Positive & Zero Sequence Impedance Measurement Test
 
Test set-up consist of 20 kVA current transformer and power analyser. Minimum 50 A applied to each phase of the HV cable by current transformer .During the test , K-factor value and line impedance calculatıons made and given as a written report by power analyser.
 
Conductivity Resistance Measurement Test
 
Test set‐up consist of 200A microohmmeter. Conductivity resistance of the cable is measured and calculated according to length of the cable per km.
 
Insulation Resistance Measurement Test
 
Test set‐up consist of 15kV megaohmmeter. Insulatıon resistance of the cable is measured and calculated according to length of the cable per km.
 
Outer Sheath Dc Test
 
Test set‐up consist of 25kV megaohmmeter. Voltage is applied to the screen wires of the cable and leakage current measured.
 
Phase Checking Test
 
Phases are short circuited from on side and sequences are checked from other side one by one with ampermeter.
 
Capacitance Measurement Test
 
Capacitance of the cable is measured and calculated according to length of the cable per km.

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