Overview
The ABB SPTPS13 is a turbine speed detection and protection module for the Symphony Plus control platform. It monitors turbine speed, supports overspeed protection, and checks for power load imbalance. In addition, it provides speed probe diagnostics, online testing, and triple-redundant input processing with 2-out-of-3 voting logic.
Operating Modes
The SPTPS13 supports three operating modes: TPS, FCS, and TSA. Each mode serves a different control function, so the correct adapter board and configuration must match the application.
- TPS mode: Supports turbine overspeed protection, turbine trip, EHC protection, and power load imbalance monitoring.
- FCS mode: Calculates turbine speed and sends the result to the main controller through the Expander Bus. In this mode, the module does not perform local protection functions.
- TSA mode: Supports speed detection, acceleration calculation, overspeed protection, speed probe diagnostics, and setpoint selection through the Auto, Manual, and Test digital inputs.
Protection and Diagnostic Functions
The module supports several turbine protection functions. The overspeed protection function responds to excessive turbine speed, while the turbine trip function uses a setpoint of 110% of rated turbine speed in the described configuration. The EHC protection setpoint matches the TRIP setpoint.
Power load imbalance monitoring compares mechanical load input with electrical load output. When the configured imbalance threshold is exceeded, the module can issue a digital output for a specified period to support turbine valve control.
The SPTPS13 also monitors speed probe signals for open- and short-circuit conditions. These diagnostics help identify input faults, while online testing allows technicians to check protection functions within the configured system.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | SPTPS13 |
| Brand | ABB |
| Product Type | Turbine Speed Detection and Protection Module |
| System Platform | Symphony Plus Harmony Rack |
| Operating Modes | TPS, FCS, TSA |
| Input Logic | Triple-redundant inputs with 2-out-of-3 logic |
| Turbine Trip Setpoint | Typically 110% of rated turbine speed |
| EHC Protection Setpoint | Same as TRIP setpoint |
| Speed Probe Diagnostics | Detects most open- and short-circuit conditions |
| Relay Outputs | 4 relay outputs for hydraulic manifold control, as described in the supplied data |
| Speed Data Transmission | Expander Bus to the main controller in FCS mode |
| Online Testing | Supported |
| Termination Units | TPTU02, NTDI01, NTDI02; verify the required configuration |
Input Logic and Online Testing
In TPS mode, the module uses triple-redundant inputs and 2-out-of-3 voting logic for protective functions. In other words, at least two of the three input channels must agree to satisfy the associated voting condition.
Meanwhile, the onboard processor calculates speed, processes input data, and manages module functions. In TSA mode, the module also supports acceleration calculation and speed probe diagnostics. The exact functions available depend on the selected mode and system configuration.
System Configuration and Replacement
The SPTPS13 is described as a replacement for the earlier SPTPS02, SPFCS01, and SPTSA01 modules. It supports different function-code configurations and uses TPS, FCS, or TSA adapter boards to select the required operating mode and I/O mapping.
Before replacing an existing module, check the adapter board, termination unit, function codes, signal mapping, and protection logic. Although the SPTPS13 consolidates functions associated with the earlier models, verify the complete configuration before installation.
Frequently Asked Questions
Q: Can the SPTPS13 replace the SPTPS02, SPFCS01, and SPTSA01?
A: The SPTPS13 is described as a replacement for these three earlier module types. However, the adapter board, function codes, termination unit, and I/O mapping must match the original application.
Q: Does the SPTPS13 provide local overspeed protection in every operating mode?
A: No. In FCS mode, the module calculates speed and sends the result to the main controller without performing local protection functions. TPS and TSA modes support different protection functions, so confirm the selected mode before use.
Q: What should I check when selecting a replacement module?
A: Confirm the existing model, operating mode, adapter board, termination unit, function codes, and required protection functions. Matching the module number alone does not confirm that the complete replacement configuration is suitable.
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