Description

ABB DS951‑АС

1. Product Title

ABB DS951‑АС‑ Excitation System Control Interface Module

2. Product Overview

DS951‑АС is a plug‑in control interface board for ABB generator static excitation systems. It performs analogue measured‑value acquisition of generator field voltage and field current, executes signal conditioning and galvanic isolation between power‑stage circuits and the main excitation regulator CPU. The module transmits control commands to thyristor power stacks and feeds back real‑time operating data for system monitoring and protection logic. This legacy PCB is high‑value spare for power‑plant synchronous‑generator excitation control cabinets.

3. Technical Specifications

• Brand: ABB
• Model: DS951‑АС
• Warranty: One Year
• Condition: 100% New & Original
• Application: Generator static excitation control interface
• Function: Analog signal acquisition, signal conditioning, isolation, command transmission
• Power Supply: Powered via rack backplane
• Operating Temp: ‑25 °C ~ +70 °C
• Mounting: Excitation cabinet rack slot‑mount
• Protection Class: IP20
• 

4. Application Scenarios

• Power‑plant Generator Excitation Cabinet: Interface board spare for ABB static excitation regulator assemblies.
• Hydro‑generator Auxiliary Control System: Replacement signal‑processing PCB for legacy excitation control racks.
• Excitation‑system Retrofit Project: Drop‑in spare for existing DS951‑АС board installations.