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9 Routine Maintenance
Due to ambient temperature, humidity, dust, and vibration, the MV Station and the inner
components will age and wear. To ensure the system safety and maintain the efficiency of
the MV Station, it is necessary to carry out routine and periodic maintenance.
All measures, which can help the MV Station work in good conditions, are within the
maintenance scope.
9.1 Safety Instructions
Lethal voltage inside the MV Station!
Wait at least 10 minutes after MV Station stops before opening the cabinet door.
Make sure the device internal is completely voltage free before any work on the MV
Station.
Only qualified personnel can perform the work described in this chapter.
Do not leave any screws, washers or other metallic parts inside the MV Station to
avoid damages to the MV Station.
Sand and moisture penetration may affect the performance of electric devices
inside the MV Station!
• Do not perform electrical connection in sandy season or when the ambient
relative humidity is above 95%.
• Perform electrical connection at fine weather days.
Voltages may still be present on cable connection terminals inside the MV Station
even though the switches are disconnected. To avoid electric shock hazard,
perform the following operations before starting maintenance work,
• Disconnect all the switches of the MV Station;
• Disconnect the upstream and downstream switches of the MV Station.
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