Support for the GISmonitor partial discharge monitoring system
Service your product
Log in to register your product, book a repair or calibration.
Troubleshooting
Check that the power is on for the cabinet and make sure there is power to the plug-in board.
- Make sure the cabling is properly connected.
- Check that the plug-in board is indicating correct initialization by green LED
- Reset alarm in GISmonitor control software
Check the cabinet for damage or visual signs of any problems. Reactivate the MCB and reset the alarm in the GISmonitor control software.
You should:
- Bridge out the uninterrupted power supply (UPS) on the back of the cabinet.
- Measure the insulation resistance of the cabinet power supply.
- Disconnect all components from their terminals until the insulation resistance is acceptable. The criterion is R > 0.2 MΩ.
- If possible, reset the alarm in the GISmonitor control software (this depends on the component).
- Report the affected component to Power Diagnostix.
You should:
- Check that the power is on for all cabinets
- Check the switches on the hat rail of the cabinets to identify the open connection
- Ports 7 and 8 must show a green LED
- Check the FO cabling between the affected switches
- Repair the FO cable
- Check the system for normal operation
- Reset the alarm in the GISmonitor control software
The cabinet’s overvoltage (OV) protection module has activated, and it needs replacing.
You should:
- Check the cabinet for damage and adequate function
- Unplug the OV protection module
- Plug in a new module
- Reset the alarm in the GISmonitor control software
This means the uninterrupted power supply (UPS) is using the battery, due to a missing power supply.
You should:
- Check if MCB has tripped
- Measure power supply
- Check all cables for secure connection
- Reset the alarm in GISmonitor control software
You should:
- Check the back of the UPS and find the thermal fuse
- Reset the thermal fuse by pressing the red button
- Test if the system has returned to normal functionality
- Reset the alarm in the GISmonitor control software
This message indicates that you must replace the UPS battery.
You should:
Contact the UPS manufacturer or Power Diagnostix for a new battery and follow the manufacturer’s battery replacement instructions.
User guides and documents
FAQs
The commissioning of each PDMS includes a so-called ‘sensitivity verification’. This sensitivity verification proves that the PDMS can detect all PD defects above a certain amplitude (typically 5 %).The sensitivity verification can be based on, e.g., CIGRE TBA 654 recommendations.
The PDMS includes an extensive self-monitoring functionality that will detect most issues automatically. Any problem then raises a “Maintenance Request” or a “System Fault” indication to the operator. If the PDMS is integrated to any superordinate systems via one of the available interfaces, such notifications are forwarded automatically.
For the GISmonitor system to detect moisture within a switchgear, that moisture needs to have an impact on the electric field, leading to a local field increase and, after that, the inception of PD. Then, it can be detected. The system will not detect the presence of moisture alone because we are measuring an electrical signal.
The correct voltage depends on the type of GIS, the type of sensor, the measurement instrument, and the type of injector used. If we do not know that information for an asset, we can rely on experience with comparable assets. For example, if we know that info for one type of 400 kV GIS, we can use its resultant recommended impulse voltage for a similar GIS of another manufacturer. That will give a good indication even though it is impossible to prove it is 100 % correct. We do not, under all circumstances, have to perform a sensitivity check according to CIGRE. While this recommendation makes sense, applying a test that is not entirely covered by the CIGRE sensitivity definition still gives a good performance evaluation of our monitoring system, validating that it can pick up the signal. Whether that's a 5 % or 10 % signal cannot be stated explicitly. But we will have a rough estimation of the sensitivity of our system, and we will have verified that it is performing what it is supposed to do.
