1. Insulation Test
To check the insulation level of every phases with respective
to earth and phase-to-phase before and after the high voltage pressure test.
2. Pressure Test (Bus bar)
To apply two-times-plus-two (2X + 2) KV DC of system voltage to phase under test with respective to earth for 15 minutes. Note: The actual DC high voltage to be applied is dependent on bus bars conditions.
3. Pressure Test (VCB)
Open Poles - To apply two-times-plus-two (2X + 2) KV DC of system voltage to phase under test with respective to earth and VCB open poles condition for 15 minutes. Note: The actual DC high voltage to be applied is dependent on cable conditions.
Closed Poles - To apply two-times-plus-two (2X + 2) KV DC of system voltage to phase under test with respective to earth and VCB closed poles condition for 15 minutes. Note: The actual DC high voltage to be applied is dependent on VCB conditions.
4. Contact Resistance Test
To ensure the bus bars joints are giving minimum reading.
To ensure the VCB contact is giving minimum reading.
Inject DC current through object (or joint(s)) under test.
Gradually increase the injected DC current to a specified current (e.g. 100A), then take the micro-ohms reading.
2. Pressure Test (Bus bar)
To apply two-times-plus-two (2X + 2) KV DC of system voltage to phase under test with respective to earth for 15 minutes. Note: The actual DC high voltage to be applied is dependent on bus bars conditions.
3. Pressure Test (VCB)
Open Poles - To apply two-times-plus-two (2X + 2) KV DC of system voltage to phase under test with respective to earth and VCB open poles condition for 15 minutes. Note: The actual DC high voltage to be applied is dependent on cable conditions.
Closed Poles - To apply two-times-plus-two (2X + 2) KV DC of system voltage to phase under test with respective to earth and VCB closed poles condition for 15 minutes. Note: The actual DC high voltage to be applied is dependent on VCB conditions.
4. Contact Resistance Test
To ensure the bus bars joints are giving minimum reading.
To ensure the VCB contact is giving minimum reading.
Inject DC current through object (or joint(s)) under test.
Gradually increase the injected DC current to a specified current (e.g. 100A), then take the micro-ohms reading.
No comments:
Post a Comment