ABB PSTB840 매뉴얼 - 페이지 3

{카테고리_이름} ABB PSTB840에 대한 매뉴얼을 온라인으로 검색하거나 PDF를 다운로드하세요. ABB PSTB840 10 페이지. Softstart upgrade to torque control

4. Step by step

1. Before disconnecting the cables mark them.

2. Disconnect the cables from terminals 1L1,

3L2, and 5L3 (main voltage).

3. Disconnect all cables from the terminals 1 to

20, external keypad, PTC sensor and the

Fieldbus plug.

4. Remove the front cover (four screws).

5. Discharge the tools and yourself by touching

earth (if you are not earthed).

6. Disconnect the cables on the HV-Board from

the thyristors and fans. Mark the cables from

the thyristors with L1, L2 and L3.

7. Remove the five screws.

8. Remove the old HV-Board. Don't lose the

connector between HV-Board and LV-

Board.

9. Disconnect the cables on the LV-Board from

the thermal switch and current transformers.

Mark the cables from the current transformers

with CT1, CT2 and CT3.

10. Remove the six screws.

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