4 REGULAR MAINTENANCE
Etrel charging station does not require any periodic maintenance.
However, it is recommended to perform a visual check and test of the
protection elements once per year.
Detailed descriptions of security checks and their intervals are included
in the service manual.
RESET AND TEST THE PROTECTION ELEMENTS
OVERCURRENT PROTECTION
Check the overcurrent protection (if installed) once a year for any visible
damages on the surface. If the overcurrent protection is tripped and the
switches cannot return to the active position something is wrong with
the protection and needs to be changed by maintenance crew.
SURGE AND OVERVOLTAGE PROTECTION
Check the surge and overvoltage protection (if installed) once a year for
any visible damages on the surface. If the surge and overvoltage
protection is tripped it needs to be changed by maintenance crew.
RCD
The regulations require that residual current protective device (RCD) is
tested regularly, and an audit log should also be kept. The test button on
the RCD unit allows user to verify the correct operation of the device by
passing a small current through the RCD unit. This simulates a fault by
creating an imbalance in the sense coil. If the RCD does not trip when
this button is pressed, then the device must be replaced by licensed
electrician. The device must be changed also when the RCD was tripped
but the switch cannot be moved back into active position. RCD testing
must be completed every three months and documented.
Figure 5: RCD test button
