50
Exchange thyristors size H7
3ADW000488R0101 DCS880 Service manual e a
Remove faulty thyristor
1. Replace all blown fuses and reconnect all fuses taken out during search for the faulty thyristor.
2. Remove the screws of the DC-busbar plates adjacent to the defective thyristors.
Note:
It depends on the location of the defective thyristor which DC-busbar plates have to be disconnected.
3. Write down the direction and location of the thyristors to be removed and mark their gate leads. In case of
BCTs add the position of the gates.
4. Remove the gate leads if possible.
5. Loosen the mounting clamp at the top of the thyristor stack.
To Next Page
Loading...
