91
2. It may be the induction voltage caused by remote control box signal wire and power wire connected together.
Suggest rewiring the remote control box. It is better to use shielding wire and not strip the wire too long.
3. The 4~20mA current signal can cause AC induction voltage (below 10kV), connect one 275V/0.33uf between
current signal and ground.
8.4 Power Cell Replacement
8.5 Maintenance
8.5.1 Routine maintenance and inspection
●
Check the indoor temperature and ventilation regularly, keep the indoor temperature no more than 45（.
●
Maintain indoor sanitation.
●
Frequently check whether there is abnormal sound or smell, whether the cabinet is over heat, or whether there
is a smell at the exhaust outlet.
●
Frequently check the cooling blower, replace or clean the filters.
●
Within the first month of operation, it’s recommended to fasten all the in and out cable, power cell in and out
cables and control cables again, and repeat every six months. And clear the cabinet dust with a vacuum cleaner.
●
Regular record VFD operation (see table 8-2), when trip to a fault, record the failure, determine and clear the
fault before power up again.
The power cells within the cell cabinet have exactly the same electrical and mechanical properties. If a failure
caused by malfunction of power cell is identified, it can be cleared by replacing.
the fault power cell with a new one. After replacement, please contact with
Santerno
, to maintenance the fault
power cell.
Replace the power cell in accordance with the following steps.
●
Stop the VFD and withdraw it from running.
●
Switch off the MV supplier, pull out the MV switchgear dolly (when equipped with a bypass cabinet, the VFD
can be isolated by the isolation knife-switch in the bypass cabinet), lock-up the local or remote MV switch and
connect the cabinet’s grounding knife-switch.
●
Open the cabinet door, and wait for all the indicator lights to turn off.
●
Unplug the TX, RX fiber heads of the fault cell.
●
Unload the R, S, T input power cable and L1, L2 output connection copper row from the fault cell.
●
Remove the fixed screws connecting the fault cell and track.
●
Pull out the fault cell along the track, handle with care.
●
Remove the fiber stopper of the new standby cell, and place it on the fault cell.
●
Install the standby cell and wire it in accordance with the reverse order of the demolition.
●
Re-power the VFD to operate
