ABB DCS880 Service Manual

43
Exchange thyristors size H6
3ADW000488R0101 DCS880 Service manual e a
Remove faulty thyristor
1. Remove the screws of the DC-busbars and branch fuses preventing the stack to be prized open.
Note:
It depends on the location of the defective thyristor which DC-busbar and fuses have to be disconnected.
2. Write down the direction and location of the thyristors to be removed and mark their gate leads.
3. Remove the gate leads if possible.
4. Loosen the mounting clamp at the top of the thyristor stack.
Attention:
While loosen the mounting clamp the indicating spring must be pulled out a little, otherwise the
spring will be damaged!
Do not remove the nuts totally, otherwise the treaded rods will fall down!
5. Attach the disassembly tool (3ADT 621 023 P1) at the faulty thyristor and prize open the upper and lower
heat sinks.
6. Remove the thyristors.
Attention:
To center the thyristors spring pins are used. The pins are inlayed into all lower heat sinks. Open
the gap wide enough that the thyristor and the pins are not damaged while removing the
thyristor!

ABB DCS880 Specifications

General

Control Type	Digital
Voltage Range	Up to 1200 V DC
Control Principle	Field-oriented control
Field Supply	Integrated
Communication Protocols	CANopen
Cooling	Air
Protection Class	IP00, IP20, IP21, IP54
Protection Features	Overvoltage, overtemperature, short circuit, earth fault
Rated Voltage	230 to 1200 V DC
Supply Voltage	380 ... 690 V AC
Input Voltage Range	230 to 690 V AC
Control Mode	Speed, Torque