System Manual
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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.
10.1.1 Five Safety Rules
Respect the following five rules in maintaining or servicing the MV Station to ensure the
safety of the maintainer.
Disconnect the MV Station from all the external connections and internal power
supplies.
Ensure that the MV Station will not be started accidentally.
Verify that the MV Station interior is discharged completely with a multimeter.
Perform necessary ground and short circuit connection.
Cover the adjacent electrical components with insulation cloth during operation.
10.2
Maintenance
10.2.1 Introduction
With IP54 protection degree, the MV Station can be installed outdoors. Harsh environment
condition or long-time operation, however, may cause aging and damage to the MV Station.
Check and maintain the MV Station periodically and replace the aged components, so as to
effectively extend the service life and increase the device performance inside the MV Station.
Unschedulded maintenance is also required, especially when the system
performance is poor.
10.2.2 Maintenance Interval
Maintain the MV Station and internal electric devices periodically to ensure the good
performance of the MV Station.
The maintenance interval described in this chapter is indicative only. The actual interval
depends on the on-site environment condition. If the MV Station is located in harsh
environment places, for example desert arrears, the maintenance interval shall be
shortened. Particularly, cleaning and anti-corrosion processing should be performed more
Summary of Contents for MVS6250
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