Introducing Energized Medium & High Voltage Cable Testing

Introducing Energized Medium & High Voltage Cable Testing

Formerly, reliable results required de-energizing and grounding the system, then disconnecting primary feed cables, all of which takes time:

•  Traditional “Hi-Pot” testing could cause damage and extend an outage
•  VLF – Very Low Frequency is the alternative method but still requires an outage
and over-voltage could cause damage and extend an outage
•  Avoid the costs and risks of older technology by utilizing online PD-testing.

ONLINE NON-DESTRUCTIVE PARTIAL DISCHARGE TESTING

ONLINE NON-DESTRUCTIVE PARTIAL DISCHARGE TESTING

(shown in photos above)

• Data acquisition without shutdown at operating voltage
• Signal analyses & pattern recognition at high frequencies determine defect type
• Measures both pre-discharge and partial discharge
• Evaluate age* differences between sections of cable
* age is not chronological age but accounts for duty use

Results: Accurate CapEx planning by ranking sections from 1-5

1. A-OK, no worries …………………………………Retest every 3rd year

2. < 5% chance of failure within 2 years ……….Retest every 2nd year

3. 18% chance of failure within 2 years ……….Retest every 2nd year

4. 34% chance of failure within 2 years ……….Plan replacement soon

5. 89% chance of failure within 2 years ……….Plan replacement now

Energized Medium & High Voltage Cable Testing

Click the link below to download this in an easy to read pdf handout:

By |2019-08-26T11:04:14+00:00January 24th, 2019|Industry News|Comments Off on Introducing Energized Medium & High Voltage Cable Testing