ABB Softstartéry - opravy, náhradní díly (EN)

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Vydal: ABB s.r.o, ELSYNN Autor: ABB ELSYnn

Strana 59 z 79







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Discharge the tools and yourselfby touching earth (if you are not earthed). Disconnect the cables from terminals 1L1, 3L2, and 5L3 (main voltage). 3. -. 4. 2. 5. Mark the cables from the current transformers with CT1, CT2 and CT3. Mark the cables from the thyristors with L1, and L3. 7. 9. Remove the old HV-Board. 10. Disconnect all cables from the terminals 1to 20, external keypad, PTC sensor and the Fieldbus plug. Disconnect the cables the HV-Board from the thyristors and fans. 8. Don’t lose the connector between HV-Board and LV- Board. Disconnect the cables the LV-Board from the thermal switch and current transformers. 6.Step step 1. Before disconnecting the cables mark them. Remove the front cover (four screws). Remove the six screws. Remove the five screws