ABB DCS880 - Drive Logic and Fieldbus Control; Drive Logic Control Words

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Exchange thyristors sizes H1 … H4
3ADW000488R0101 DCS880 Service manual e a
Exchange thyristors sizes H1 … H4
Installation of thyristor modules and SDCS-BAB-F0x in converters size
H1 … H4 (20 ... 1000 A)
All DCS880 size H1 … H4 are equipped with thyristor modules and a SDCS-BAB-F0x for excitation. In order to
keep the operating temperature of the semiconductor module low, the joint between the heat sink and the
module should have a good heat conducting ability. The electrical conductivity of the connectors must also be
good. For this reason the following instructions must be observed with particular care.
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:
Mounting torques for the the thyristor modules and
SDCS-BAB-F0x to heat sink and electrical connections
see table
Nominal mounting torque for thyristor modules
and SDCS-BAB-F0x.
− Torque spanner for electrical connections:
13Nm (M8)
25 Nm (M10)
50 Nm (M12)
− Screws are metric type; use appropriate nuts.
− 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
− or
− Thermal joint compound:
Type WLPF 20 (10 ml)
ABB Service: GHSN 390 011 P 10
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!
Find faulty thyristor modules
See Fault Tracing Thyristors of this publication.