ABB TPS02 Turbine Protection Module

Product Details

TPS02 Product Description

The ABB TPS02 is a dedicated Turbine Protection Slave module engineered for seamless integration within ABB's UNITROL excitation control architecture. Designed to operate as a subordinate protection layer within multi-module excitation systems, the TPS02 delivers precise overvoltage, overcurrent, and loss-of-excitation protection functions that are fully synchronized with the master excitation controller. Its architecture-native design ensures that protection logic, signal conditioning, and fault response are tightly coupled with the broader UNITROL platform, eliminating the latency and compatibility risks associated with third-party protection relays. In power generation facilities, turbine protection is not a standalone function — it is a system-level discipline. The TPS02 addresses this by embedding protection intelligence directly into the excitation control loop, enabling coordinated fault isolation, automatic restart sequencing, and real-time diagnostic feedback across the entire generator protection chain.

Within a complete UNITROL-based excitation system, the TPS02 operates alongside the UNITROL 1000, UNITROL 5000, or UNITROL 6000 automatic voltage regulators (AVRs), sharing a common backplane communication bus that ensures sub-millisecond protection response times. The module interfaces directly with the UNITROL Power Interface (UPI) board for field current measurement and with the UNITROL Digital Interface (UDI) for setpoint synchronization. In redundant excitation architectures, the TPS02 supports hot-standby configurations where the protection slave mirrors the active channel's state, enabling bumpless transfer during channel switchover. This redundancy capability is critical in base-load power plants, combined-cycle facilities, and industrial co-generation systems where unplanned generator trips carry significant operational and financial consequences.

The TPS02's signal processing architecture is built around high-resolution analog input channels that accept standard CT and VT secondary signals, with configurable scaling to accommodate a wide range of generator ratings. Protection functions include definite-time and inverse-time overcurrent elements, instantaneous overvoltage and undervoltage protection, loss-of-excitation detection via impedance-based algorithms, and stator earth fault protection using third-harmonic voltage methods. All protection elements are parameterized through ABB's UNITROL configuration software, allowing engineers to align protection settings with generator capability curves, system impedance data, and grid code requirements without requiring hardware modifications. The module's non-volatile memory retains all configuration data through power cycling, ensuring protection integrity during commissioning and maintenance windows.

From a system integration perspective, the TPS02 connects to the plant-level DCS or SCADA infrastructure via the UNITROL communication gateway, supporting PROFIBUS DP, Modbus RTU, and IEC 61850 GOOSE messaging for protection status reporting and remote trip command reception. This communication capability allows the TPS02's protection events to be logged in the plant historian, correlated with turbine governor data, and used for post-fault analysis without requiring dedicated protection relay engineering tools. In facilities using ABB's System 800xA distributed control system, the TPS02 integrates natively through the AC800M controller platform, enabling unified alarm management, protection coordination, and maintenance scheduling from a single operator interface.

Installation of the TPS02 follows standard UNITROL rack mounting procedures, with the module occupying a single slot in the UNITROL 19-inch subrack. Power is supplied from the UNITROL internal DC bus, eliminating the need for separate auxiliary power wiring. Signal connections are made via the module's rear-panel terminal block, which accepts standard 2.5 mm² control cables. The module's front panel provides LED status indicators for power, communication, protection active, and fault conditions, supporting rapid visual inspection during commissioning and routine maintenance rounds. Thermal management is handled by the subrack's forced-air cooling system, with the TPS02 rated for continuous operation in ambient temperatures from 0°C to 55°C, suitable for installation in generator excitation cubicles and motor control centers.

Long-term maintainability is a core design principle of the TPS02. The module supports online firmware updates through the UNITROL service interface, allowing protection algorithm improvements and grid code compliance updates to be applied without system shutdown. Diagnostic data, including protection element pickup counts, fault waveform captures, and communication error logs, are stored in the module's internal flash memory and accessible via the UNITROL configuration software. This data supports predictive maintenance programs by identifying trends in protection element activity that may indicate developing generator or excitation system faults before they result in unplanned outages. All units supplied by NANKMOS are tested against ABB factory acceptance criteria prior to shipment and are covered by a 12-Month Warranty from the date of delivery.

The TPS02 achieves its full operational potential when deployed as part of a coordinated UNITROL excitation and protection architecture. At the excitation control layer, the UNITROL 5000 or UNITROL 6000 AVR serves as the master controller, providing voltage regulation setpoints and excitation current references that the TPS02 monitors for protection boundary compliance. The UNITROL Power Interface (UPI) board supplies field current feedback signals to the TPS02, enabling loss-of-excitation detection with the accuracy required for large synchronous generators. For facilities requiring redundant excitation, the UNITROL Redundancy Switch Module (RSM) coordinates channel transfer operations with the TPS02's protection state, ensuring that protection coverage is maintained continuously during switchover events.

At the I/O and signal conditioning layer, the UNITROL Digital Interface (UDI) module provides the digital I/O expansion required for external trip command reception and protection status output to the generator circuit breaker control system. In installations where the generator protection scheme includes a dedicated numerical protection relay such as the ABB REG670 generator protection IED, the TPS02 communicates protection status via IEC 61850 GOOSE messages, enabling coordinated tripping between the excitation protection and the main protection relay without hardwired intertripping cables. The ABB AC800M controller, when used as the plant DCS front-end, receives TPS02 protection events via the UNITROL communication gateway and integrates them into the plant-wide alarm and event management system.

For power supply integrity, the UNITROL subrack's internal DC power distribution ensures that the TPS02 and all co-located modules share a common, filtered power bus, reducing the risk of protection maloperation due to power supply transients. In critical applications, an external UPS system connected to the excitation cubicle's AC input provides ride-through capability during grid disturbances. The ABB UNO-PS series or equivalent DIN-rail power supply units are commonly used in the auxiliary power circuit of UNITROL excitation cubicles to support the control and protection electronics during generator startup and shutdown sequences.

The ABB TPS02 is deployed across a broad spectrum of power generation and industrial drive applications where synchronous generator protection is a critical system requirement. In combined-cycle power plants, the TPS02 provides excitation protection for gas turbine generators operating in both island and grid-connected modes, with protection settings coordinated with the plant's unit protection scheme to prevent generator damage during grid fault ride-through events. In hydroelectric facilities, the TPS02's loss-of-excitation protection is configured to detect the transition from generator to motor operation that can occur during load rejection events, initiating controlled shutdown sequences that protect both the generator and the hydraulic turbine.

In industrial co-generation facilities within the petrochemical, cement, and steel sectors, the TPS02 supports excitation protection for synchronous generators operating in parallel with the utility grid, where reactive power control and power factor correction are managed through the UNITROL AVR. The module's stator earth fault protection is particularly valuable in high-resistance grounded generator systems common in industrial power plants, where conventional zero-sequence current methods have limited sensitivity. In offshore oil and gas platform power systems, the TPS02's compact form factor and wide operating temperature range make it suitable for installation in the space-constrained and thermally challenging environments of platform electrical rooms. Mining and mineral processing facilities operating large synchronous motors in variable-speed drive applications also utilize the TPS02's protection functions to safeguard the excitation systems of wound-rotor synchronous motors used in grinding mill and conveyor drive applications.

Q1: Is the ABB TPS02 compatible with both UNITROL 5000 and UNITROL 6000 excitation platforms?Yes. The TPS02 is designed for use within the UNITROL modular excitation architecture and is compatible with UNITROL 5000 and UNITROL 6000 systems. Compatibility with UNITROL 1000 should be verified against the specific system configuration and firmware version. NANKMOS can provide compatibility verification support based on your system's hardware and software revision data prior to order placement.

Q2: Can the TPS02 be replaced online without shutting down the excitation system?Hot-swap capability depends on the specific UNITROL system configuration and whether redundant excitation channels are installed. In dual-channel redundant configurations, the standby channel can maintain excitation control while the TPS02 in the active channel is replaced. For single-channel systems, a planned outage is required for module replacement. NANKMOS recommends maintaining a spare TPS02 module on-site to minimize mean time to repair (MTTR) in the event of a module fault.

Q3: What does the 12-Month Warranty cover for the ABB TPS02 supplied by NANKMOS?All ABB TPS02 modules supplied by NANKMOS are covered by a 12-Month Warranty from the date of delivery. The warranty covers manufacturing defects, component failures under normal operating conditions, and firmware integrity. Each unit undergoes pre-shipment functional testing against ABB factory acceptance criteria. In the event of a warranty claim, NANKMOS provides advance replacement service to minimize system downtime. Contact [email protected] or +86 18359268345 for warranty registration and claim processing.