ABB SPHSS13 S+ Turbine Hydraulic Servo Module

The ABB SPHSS13 is a high-reliability hardware component engineered for closed-loop valve positioning and loop regulation within Symphony Plus systems. This unit regulates fluid flow or pressure variables to drive main steam valves, intercept valves, or governing actuators based on immediate turbine speed and load reference demands. By executing dedicated servo-loop control algorithms independently, the module maintains tight dynamic response loops and reduces critical processor bus constraints across the backplane architecture during sudden load rejections or transient grid fluctuations. This module serves as the direct current-generation replacement for the legacy ABB SPHSS03 module, providing identical mechanical form-factor drop-in compatibility alongside upgraded signal reliability tolerances.

Features

• Redundant Coil Architecture: Equipped to interface with redundant servo coils to maintain live actuation lines if a primary channel faults.
• Versatile LVDT Feedback Processing: Natively accepts feedback signals from either redundant AC or redundant DC Linear Variable Differential Transducers.
• Symmetry Plus Integration: Fully compatible with standard S+ Turbine backplanes and Distributed Control Unit frameworks.

Applications

• Managing redundant servo loop control on main steam or reheat control valves within power generation facilities.
• Upgrading older control topologies utilizing legacy cards to modern, fault-tolerant standards.
• Critical positioning of hydraulic governor systems in heavy industrial turbine applications.

Technical Specifications

Installation Guidelines