Condition assessment on electrical machines
Condition assessment provides knowledge about the state of the various components in HV grids. This knowledge contributes to the right decisions regarding maintenance and replacement.
Condition based-maintenance improves the overall performance at a lower cost
Partial discharge (PD) is regarded as the best early warning indicator of insulation degredation in MV & HV assets.
The PD survey reveals and locates faults without service interruption. This is a complex PD survey which captures the PD pattern with it`s waveform and the frequency spectrum of every PD pulse that the fault generates. This provides the complete information regarding the activity so that appropriate measures can be taken
The survey is suitable for any electrical equipment from 3kV to 600kV.
Source: IEEE 493-1997 (GOLD BOOK)
A PD survey will:
• Reveal insulation weaknesses in MV & HV systems
• Increase reliability in MV & HV assets
• Increase asset longevity
• Increase safety
• Reduce Risk
• Reduce maintenance costs moving from preventive to condition based-maintenance
Online PD Survey
VLF with TD & PD Diagnose
High voltage testing of electrical machines is described in IEEE Std 433-2009.
The purpose of the test is to determine the integrity of the insulation in the transformer. If the insulation passes the test, the probability of a failure before the next service interval is lower.
Admittedly, an approved test cannot guarantee that an error may occur, but experience indicates that the test reveals errors that could otherwise have resulted in a failure.
The test includes:
- Stress test / Insulation test
- TanDelta test (Loss factor)
- PD measurement
Kontroll av høyspent motorer og generatorer
Kontroll av høyspent motorer og generatorer