Overview
The ABB 720091-1 frequency droop card is a specialized circuit board manufactured by ABB (ASEA Brown Boveri) for industrial turbine and generator control systems. This PC board module provides droop frequency and output control regulation, essential for maintaining stable frequency response in power generation and motor drive applications. Though discontinued by the manufacturer, new and refurbished units remain available through industrial surplus channels for system upgrades and replacement installations.
Key Features
- Frequency droop control functionality for turbine and generator applications
- Legacy design compatible with ABB STAL control systems
- Compact, reliable circuit board construction
- Suitable for new installations or retrofit of existing control cabinets
- New in box condition available with manufacturer’s original packaging
Technical Specifications
- Part Number: 720091-1 / 7200911
- Manufacturer: ABB (ASEA Brown Boveri)
- Product Type: PC Board / Add-On Module
- Function: Frequency Droop Control Card
- Weight: 0.20 lbs (90.7 g)
- Application Series: ABB STAL Controllers
- Condition: New in Box
- Manufacturer Status: Discontinued
Typical Applications
The ABB 720091-1 droop frequency card is commonly used in:
- Turbine generator control systems and load-sharing applications
- Industrial motor drive frequency regulation
- Power plant automation and protection circuits
- Facility upgrades where legacy ABB STAL systems are being maintained or restored
- Original equipment manufacturer (OEM) replacement for aged or failed droop modules
Compatibility & Replacements
The 720091-1 is a legacy ABB board with direct compatibility in ABB STAL turbine and motor control systems that originally specified this droop frequency module. As a discontinued product, replacement availability is limited to industrial surplus and refurbished channels. Engineers should verify slot type and pin configuration against the host controller documentation prior to installation. Modern frequency droop functionality may be provided by contemporary ABB drives and motion control products; consult ABB technical support or your automation reseller for modern alternatives if new board stock is unavailable.
