SNAGS High Voltage & PD for Cables
Withstand voltage tests on XLPE cables can be performed using the AC test system with variable frequency once laid on-site. The test system operates in a frequency range from 20 Hz to 300 Hz and complies with the requirements according to IEC 60840 and IEC 62067. An individual test system is designed for tests of up to 260 kV and 83 A, which facilitates testing of high-voltage cables that can be several kilometers in length. Several test systems can be conveniently connected in series when higher test voltages are required or in parallel when testing cables of up to 100 kilometers in length. These systems can even be used to test ultra-long submarine cables that connect offshore wind farms. The test system has been mounted on a standard-sized trailer, which facilitates transport to the specific site. The test system can be set up on-site within an hour without cranes or similar equipment.
- HV & EHV Cable Testing up to 400kV
- Electrical test (Preliminary, Precommissioning ) of Cables up to 400kV
- DC High Voltage Testing
- VLF Testing
- Jointing and Termination Works for Cable up to 132kV.
- Cable Fault Locating Services
- Offline & Online PD Measurement
- Link box & SVL installation & Testing
- On-site testing of XLPE terrestrial and submarine cables
- Off-line Sequential & Simultaneous Tests for jointed and non-jointed cable systems
- On-line 24-hour Soak Test
- Other tests performed: Impedance Test, Sheath Current Test, Capacitance Test, Polarization Index, Tan-Delta, Insulation Resistance Test
- PD localization (Time Domain Reflectometry & Arrival Time Analysis)
Commissioning Test and Partial Discharge Measurements
Commissioning tests are the final check on the cable system, performed to pinpoint eventual damages caused during the installation process. SNAGS or with PD Associate personnel will provide an accurate measurement in order to verify absence of dangerous Partial discharge phenomena discriminating between possible noise or disturbances.
For the commissioning of cable systems, SNAGS offers different methodologies:
AC Hi-Pot or 24-hour Soak Test and Partial Discharge commissioning testing of new HV and EHV underground cable installations as per IEC 60840 and IEC 62067
Access to a range of small and large Resonant Test Systems, and can test cables up to 500kV at 1.7U0, both short and long circuits
Installation and commissioning of permanent Partial Discharge sensors for on-line and remote PD monitoring
