Product Introduction

The ABB SPHSS13 is a high-performance hydraulic servo module for ABB Symphony Plus / Bailey INFI90 Harmony Rack DCS system, widely used in turbine DEH valve control. It executes local closed-loop position control, receives valve command from multifunction processor and dual redundant LVDT position feedback, outputs ±300mA drive current for electro-hydraulic servo valves. It supports P and PI control algorithms, built-in hardware diagnostics, open/short circuit detection and fault alarm. This single-slot rack module is designed for steam turbine governor valves, main steam valves, gas turbine fuel valves and hydro turbine wicket gate control in power plants.

Content Details

SPHSS13 acts as the core servo control card of turbine DEH system. It communicates with MFP controller via backplane bus, compares setpoint and real valve position from redundant LVDT sensors, calculates control output and drives servo valve torque motor. Redundant LVDT inputs and dual servo outputs improve system reliability for critical power generation equipment. Built-in self-diagnosis continuously monitors signal circuit, sensor status and internal hardware, reporting faults to DCS for alarm. Standard Harmony rack plug-in design facilitates installation and on-site replacement. Robust industrial circuit design allows stable continuous operation under strong vibration and high electromagnetic interference in power station control cabinets. SPHSS13 is used as spare replacement and system retrofit for ABB Symphony Plus / INFI90 DCS turbine control system. Before shipment, each unit undergoes full functional test and thermal aging inspection to eliminate hidden defects and guarantee reliable long-term continuous operation.

Tags: SPHSS13 ABB hydraulic servo module Symphony Plus DEH valve control card

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