-.Step step
1.
7.
Disconnect the cables the HV-Board from
the thyristors and fans. Remove the six screws. the cables from the current transformers not
are marked, mark them with and 3. Disconnect the cables from terminals 1L1,
3L2, and 5L3 (main voltage). Remove the old HV-Board.
5.
4. Remove the five screws. Don’t lose the
connector between HV-Board and LV-
Board. Disconnect all cables from the terminals 1to
20, external keypad, “Analogue Out/PTC”
sensor and the Fieldbus plug.
Disconnect the cables the LV-Board from
the thermal switch and current transformers.
8.
3.
10.
2.
9. Before disconnecting the cables mark them.
6. Remove the front cover (four screws). the cables from the thyristors not are
marked, mark them with and 3.
If only the HV-Board will changed to
step 21. Discharge the tools and yourselfby touching
earth (if you are not earthed).
If the Softstarter shall upgrade Torque
Control step 9
