Description
Technical Specifications
| Parameter | Specification |
|---|---|
| Product model | SPHSS13 |
| Manufacturer | ABB |
| Product category | Intelligent I/O module |
| Intended system | Symphony Plus HR Series / Harmony Rack |
| LVDT feedback inputs | 4 analog secondary inputs for 2 LVDTs, with 2 secondaries per LVDT |
| LVDT input rating | 24 V peak-to-peak; ±7 V DC common mode |
| Differential input impedance | 10 kΩ |
| LVDT excitation outputs | 2 analog outputs |
| Excitation frequency | 400 Hz–15 kHz |
| Servo-valve outputs | 2 protected analog outputs |
| Servo mode output | Up to ±300 mA |
| I/H converter output | 4–20 mA or 20–160 mA, depending on configuration |
| Digital inputs | 3 optically isolated contact inputs: raise, lower, and trip bias |
| Digital output | 1 optically isolated open-collector output for hard-manual function |
| Typical supply rails | +5 V DC, +15 V DC, −15 V DC, and +24 V DC from the termination unit |
| Ambient temperature | 0–70°C, per ABB catalog |
| Dimensions | Approximately 35.56 × 177.80 × 298.45 mm |
| Net weight | Approximately 0.272 kg |
Specifications are taken from ABB’s Symphony Plus product catalog and product data. Verify the exact termination unit, wiring, and configuration before installation.
Product Overview
The ABB SPHSS13 is designed for turbine-control applications where hydraulic actuators position steam or gas turbine valves. The module interfaces with the control system’s commands, drives the appropriate servo-valve coil or I/H converter, and receives actuator position feedback from linear variable differential transformers (LVDTs).
In a typical application, the actuator positions a steam throttle valve, steam control valve, gas turbine fuel valve, or inlet guide vane. The resulting valve position affects steam or fuel flow and therefore contributes to turbine operating control. The module’s role is to manage the position-control interface; the overall turbine governing function also depends on the controller, feedback devices, hydraulic equipment, and application configuration.
SPHSS13
The SPHSS13 supports PI and P-only control modes and provides redundant servo-coil outputs and redundant AC or DC LVDT feedback. These features support applications requiring continuous actuator positioning and feedback supervision. It can also be used with open-close valves to report position without performing active modulating control, depending on the system configuration.
Major Features and Advantages
1. Hydraulic actuator position control
The SPHSS13 provides the interface between the control system and hydraulic servo equipment. It regulates the appropriate output to position an actuator through a compatible servo valve or I/H converter. Correct operation depends on matching the output mode to the connected field device.
2. Redundant position feedback
The module supports two LVDTs, each with two secondary feedback signals. This arrangement enables the control system to receive multiple position-feedback signals, supporting the intended monitoring and control strategy. Actual redundancy behavior depends on the wiring and application configuration.
3. Redundant servo outputs
Two protected servo outputs support the specified actuator-control arrangement. ABB’s catalog describes output protection so that an open or short condition on one output does not affect the other output. This feature does not eliminate the need to investigate field wiring faults or verify actuator behavior during maintenance.
4. Multiple control and output modes
The module supports PI and P-only control and can interface with servo valves or I/H converters. The correct operating mode and output range must be selected for the installed hardware and hydraulic control design.
5. Turbine-control integration
The SPHSS13 is part of ABB’s Harmony Rack turbine-control module family. In many applications it operates with a speed-detection module such as SPTPS13, while other system components provide turbine speed regulation, protection, and supervisory logic.
Typical Applications
- Steam turbine throttle and control-valve positioning
- Gas turbine fuel-valve control
- Inlet guide vane and nozzle-angle positioning
- Hydraulic actuator control in turbine-governing systems
- Valve-position feedback for open-close applications
- Maintenance and replacement of compatible ABB Harmony Rack turbine-control modules
Installation and Maintenance
- Verify the module identity. Confirm the label reads SPHSS13 and check the installed hardware and revision details.
- Check the termination unit. Verify compatibility with the installed rack and field-wiring arrangement.
- Inspect LVDT wiring. Confirm primary excitation, secondary feedback connections, signal polarity, and the applicable AC or DC LVDT type.
- Verify servo output mode. Check whether the field device requires servo-current output or an I/H converter signal.
- Review the control configuration. Confirm PI or P-only mode, scaling, feedback selection, and relevant alarm or trip logic.
- Perform controlled commissioning. Test feedback validity, output response, valve travel, and fault handling under the plant’s approved turbine-maintenance procedure.
Because the module participates in turbine valve control, installation and testing should be performed by qualified personnel using the applicable ABB documentation and site safety requirements.
Product Assurance and Procurement Notes
When sourcing an ABB , confirm the full module designation and compatibility with the installed Harmony Rack or Symphony Plus HR Series system. Check the associated termination unit, LVDT type, servo-valve or I/H converter requirements, and control configuration before approving a replacement.
For used or refurbished units, request photographs of the actual hardware and confirmation of the inspection or functional testing performed. A visual check alone does not establish correct feedback acquisition or servo-output operation.
Procurement note: ABB identifies as a hydraulic servo module for turbine control. The related SPHSS03 appears in ABB-related listings as an earlier module for which is the current replacement designation; however, any substitution should still be checked against the installed system’s hardware, wiring, and application requirements.
