64
Exchange thyristors size H8
3ADW000488R0101 DCS880 Service manual e a
Install new thyristor
1. Ensure that the new thyristor is of the correct type (see
of this manual). Keep the semiconductor
and its surroundings clean.
Note:
Do not touch the polished surfaces of the thyristor.
2. Clean all parts with tissue paper moistened with solvent, which have had or will have contact with the
thyristor or each other (lower/upper heat sink). Do not clean the surfaces of grease too thoroughly, because
the aluminum surfaces will oxidize in a few seconds. Dry all surfaces.
3. Clean the polished surfaces of the semiconductor with a piece of tissue paper moistened with solvent. Dry
all surfaces. Spread a
thin
layer of conducting paste on both sides of the thyristor, if necessary use a rubber
spatula.
4. Centre the thyristors by means of the spring pins.
Note:
Be sure that the thyristor is installed in the right direction. Do not pinch or cut the gate leads or any other
cable.
5. Turn the thyristor so that the gate leads point in the right direction.
6. Connect the gate leads if possible.
7. Tighten the nuts of the mounting clamp by hand so that the clamp is in parallel with the contact surface of
the heat sinks.
Note:
The indicating spring is a very sensitive instrument and must be handled with care.
Содержание DCS880 series
Страница 1: ... DCS880 DCS880 Service manual ...
Страница 46: ...46 Exchange thyristors size H6 3ADW000488R0101 DCS880 Service manual e a Location of branch fuses frame H6 ...
Страница 58: ...58 Exchange thyristors size H7 3ADW000488R0101 DCS880 Service manual e a Location of branch fuses frame H7 ...
Страница 127: ...127 Appendix Spare Parts List 3ADW000488R0101 DCS880 Service manual e a Appendix Spare Parts List ...