For testing at voltages ≥ 100 kV requires power cables to be prepared and terminated in a special manner in order to control the electrical field distribution along the cable ends. The Cable Test Termination (CTT) comprises of inner and outer tubes and electrodes at the high and low voltage ends to attain a linear voltage distribution along the tubes of the termination to avoid field enhancement and partial discharge on the surface. The Water Processing Unit (WPU) continuously regulates the conductivity of water to remain very low to avoid partial discharge and dissipates the heat generated during the testing.
Models are available that fulfill the following specifications:
AC testing up to 1000 kV
Lightning impulse testing up to 1600 kV
Switching impulse testing up to 1100 kV
PD levels ≤ 2 pC up to 600 kV and ≤ 5 pC up to 800 kV
Testing point for capacitance and tan delta
DATA SHEET:
CTTS Features
Shortest peeling length of the cable ends in the market, optimized for routine tests
Shortest peeling length of the cable ends in the market, optimized for routine tests
AC, Lightning Impulse (LI), and Switching Impulse (SI) guaranteed specifications
Longer interchangeable tubes available for LI & SI testing
Capacitance and tan delta testing point
Accurate conductivity setting
Different models available with rated voltage up to 1000 kV AC, 1600 kV LI, and 1100 kV SI
Partial discharge rating of ≤ 2 pC between 200 – 600 kV and ≤ 5 pC between 700 – 800 kV
Integrates all tests within one unique system: AC, LI, SI, PD, C/tan delta, Step Test
Small ownership cost due to reduce peeling lengths and optimal preparation time
Small footprint – more space available in the test room
Withstand voltage test possible at 20% higher than rated AC voltage
Unique deionization system, minimizes operation cost