ABB G771K227A Pulse Amplification Drive Board

Product Description

G771K227A is a pulse amplifier & driver board for ABB legacy thyristor DC drives, a spare part for old-generation DC speed converters, widely used in early DCS series DC cabinets. This board receives weak trigger signals from the main control board, amplifies the signals and outputs driving pulses for thyristors. It also integrates pulse monitoring and fault feedback circuits to realize synchronous trigger control for the armature thyristor bridge. It is obsolete from ABB production. Available supplies are new old stock or tested used units, commonly used for maintenance replacement of old DC drive systems in steel and paper mills.

Specifications

• Model: G771K227A
• Brand: ABB
• Type: Pulse amplifier driver board
• Compatible equipment: ABB legacy thyristor DC drive cabinets (old DCS series)
• Power supply: Auxiliary power from the DC drive unit
• Function: Pulse signal amplification, thyristor trigger driving, pulse status detection, fault feedback
• Mounting: Plug-in PCB board inside cabinet
• Interface: Hardwired terminals for pulse signal input and power pulse output
• HS Code: 85389099
• Lifecycle: Obsolete, no original new production; available as NOS / tested used spare
• Matching boards: DC drive main control board, synchronisation sampling board

Application

1. Fault maintenance and spare replacement for ABB legacy thyristor DC speed converters;
2. Existing old DC drive equipment for metal rolling mills, wire drawing, paper rewinders and extruders;
3. Thyristor rectifier bridge trigger pulse amplification & output, synchronous pulse driving, pulse loss fault detection;
4. Spare stocking, on-site maintenance and retrofitting for legacy DC drive production lines;
5. Spare replacement for old DC speed control systems in power plants, mines and chemical plants.

Same Series Models (G771K Pulse Board Series)

1. G771K227A Pulse Driver Board
2. G771K226A
3. G771K228A
4. G771K230A
5. G771K231A
6. G771K232A