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Exchange thyristors size H8
3ADW000488R0101 DCS880 Service manual e a
Exchange thyristors size H8
Installation of thyristor modules in converters size H8 (2500 … 5200 A)
All DCS800 converters sizes H6/H7/H8 are equipped with disk type thyristors. The structure of the disc type
semiconductor component is such that it requires a certain compression force to operate. The prevention of
overheating of the component essentially depends on good heat dissipation between the semiconductor and the
conducted heat sink. It is thus important that all joints have good thermal and electrical conduction.
Required tools
Special tools or material needed in addition to standard tools for the exchange of thyristor modules:
−
Torx screwdrivers:
TX10, TX20, TX25.
−
Torque spanner for electrical connections:
13Nm (M8).
25 Nm (M10).
50 Nm (M12).
−
Screws are metric type; use appropriate nuts.
−
17 mm ring spanner for fuse and busbar
connections.
−
24 mm ring spanner for press clamp.
−
Tissue paper.
−
Solvent (e.g. ethanol).
−
Thermal joint compound (grease):
Type Berulub FZ1 E3.
Manufacturer:
Carl Bechem GmbH, 58089 Hagen.
ABB Service:
GHSN 390 011 P 0051.
−
Disassembly tool:
DCF 1066721 P1.
Note:
For more detailed information about the wiring of the power part, see
Therefore strict observance of the build in instructions given below is of utmost importance. Make sure that the
new component can replace the old one in accordance with the spare part list (see
All thyristors are always mounted in the same direction, independent of current, voltage, number of quadrants
(2-Q or 4-Q), left or right side connection.
Semiconductors and heat sinks are to be handled carefully to avoid scratches and other damage. Avoid
touching the contact surfaces. Do not lift the semiconductor with the gate wire. Do not lift the semiconductor by
touching the current contact surfaces. Do not damage the welding flange or the contact surface.
Before the work is started, disconnect the converter completely from the power supply,
then check the voltage free condition and make sure, everything is located in an electrical
and mechanical safe condition!
Содержание DCS880 series
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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 ...