Overview
The ABB 720091-1 is a specialized frequency droop F/O (frequency/output) controller card engineered for precision frequency and output control in turbine-driven generator systems. Manufactured by ABB (ASEA BROWN BOVERI), this controller card operates as an add-on PC board module within larger turbine control and regulation systems. Though discontinued by the manufacturer, the 720091-1 remains a critical replacement component for legacy installations requiring exact interchangeability and proven performance.
Key Features
- Frequency droop control function for stable turbine-generator operation
- F/O (Frequency/Output) monitoring and regulation capability
- Compact PC board form factor for standard slot mounting
- Proven reliability in long-running industrial turbine systems
- New in box, factory-sealed condition
Technical Specifications
- Part Number: 720091-1 (also listed as 7200911)
- Manufacturer: ABB / ASEA BROWN BOVERI
- Product Type: PC Board / Add-On Card
- Function: Frequency Droop Controller
- Weight: 0.20 lbs (0.09 kg)
- Status: Discontinued by Manufacturer
- Condition: New in Box (NSMP – New Surplus Manufacturer Package)
Typical Applications
The ABB 720091-1 is commonly used in:
- Turbine speed and frequency regulation systems
- Generator output frequency stabilization
- Hydroelectric and thermal power generation controls
- Industrial steam turbine governors
- Legacy automated power plant control systems requiring frequency droop feedback
Compatibility & Replacements
The 720091-1 is a legacy component for which exact modern replacements may not be available. Direct interchangeability should be verified with original system documentation before ordering. This card is typically found in ABB STAL turbine control systems. For maintenance and troubleshooting of legacy turbine generators, new surplus stock of the 720091-1 provides drop-in compatibility with original equipment installations. When replacing or upgrading control systems, consult ABB technical documentation or a qualified systems integrator to confirm pin-out, voltage, and signal requirements match your installed base.
