SPECIFICATIONS
Part No.: IS200TREAH1ADC
Manufacturer: General Electric
Country of Manufacture: United States of America (USA)
Size: 15.9 cm high x 10.2 cm wide
Temperature: -30 to +65oC
Technology: Surface mount
Product Type: turbine emergency trip terminal board
Availability: In Stock
Series: Mark VIe
Functional Description
IS200TREAH1ADC is a turbine emergency trip terminal board developed by GE. It is part of the Mark VIe series. The turbine emergency trip terminal board, TREAH1A, serves as a vital component within the PPRO turbine I/O packs, forming an integral part of the Mark VIe system. This board is responsible for managing inputs and outputs critical to the emergency trip functionality of the turbine system. The integration of various inputs and outputs within the board highlights its critical role in the emergency trip functionality of the turbine system. Its ability to handle customer inputs, monitor turbine speed, trigger emergency trips, and facilitate expandability through daughterboard connectors showcases its importance in ensuring system safety, reliability, and adaptability within the Mark VIe system.
Features
- Customer Input Terminals: The board offers customer input terminals through two 24-point pluggable barrier terminal blocks. These terminals facilitate external connections and inputs, allowing customization and integration of additional signals or control inputs based on specific customer requirements.
- Passive Pulse Rate Devices: Nine passive pulse rate devices are integrated into the board. These devices, distributed across three each for the X, Y, and Z sections, are used to sense a toothed wheel, effectively measuring the turbine speed. This information is crucial for speed monitoring and control within the turbine system.
- Jumper Blocks for Speed Inputs: Jumper blocks are included on the board to enable the fanning (duplication) of one set of three speed inputs across all three PPRO I/O packs. This configuration ensures consistency and redundancy in speed signal inputs, enhancing reliability and safety in speed monitoring.
- 24 V DC TMR Voted Output Contacts: The board features two 24 V DC Triple Modular Redundant (TMR) voted output contacts designed to trip the system in emergency situations. These contacts serve as critical safety measures for swiftly triggering the emergency trip functionality.
- Voltage Detection Circuits: Four circuits dedicated to monitoring trip strings are incorporated into the board. Operating within the voltage range of 24-125 V DC, these circuits facilitate continuous monitoring of the trip string, ensuring its integrity and functionality.
- Daughterboard Connectors for Expansion: The board includes daughterboard connectors, providing options for optional feature expansion. These connectors allow for additional modules or functionalities to be added to the board, enhancing its capabilities as needed for specific system requirements or upgrades.
Installation
- I/O Terminal Blocks TB1 and TB2: TB1 is designated for connecting voltage detection and the breaker relay, while TB2 is reserved for passive pulse rate pick-ups.
Each terminal block (TB1 and TB2) is secured with two screws, ensuring stability and proper connection of the wiring.
These terminal blocks are equipped with 24 terminals designed to accommodate wires up to 12 AWG (American Wire Gauge). This provides flexibility in the size and type of wires used for connections.
- Wire Connection Process: Wires for voltage detection, breaker relay, and passive pulse rate pick-ups are connected to the respective terminals on TB1 and TB2.
The terminal blocks allow for the secure attachment of the wires, ensuring reliable connections essential for proper functioning of the system.
Adequate care is taken during the wiring process to ensure that the wires are correctly inserted and secured within the terminal blocks.
- Shield Termination Strip and Chassis Ground: Adjacent to each terminal block (TB1 and TB2), a shield termination strip is positioned. This strip is attached to chassis ground, providing a designated point for grounding shielded cables or wires.
- Proper grounding is essential for minimizing electrical interference and maintaining signal integrity in the system. Connecting shielded cables to the shield termination strip ensures effective grounding, preventing potential issues arising from electromagnetic interference.
- Chassis Grounding Procedure: The attachment of the shield termination strip to chassis ground is crucial for establishing a solid grounding connection. This helps in dissipating electrical noise and ensuring system safety and stability.
Contact outputs
- Polarity Sensitivity: Polarity sensitivity in contact outputs implies that the direction or polarity of the electrical current passing through the contacts matters. Applying the wrong polarity or incorrect wiring can potentially damage the relays or their associated contacts.
- Wiring Precautions: Careful attention must be paid while wiring the circuits connected to these contact outputs to prevent any issues related to polarity. Ensuring the correct wiring configuration based on the system's specifications and guidelines is essential to prevent damage.
- External Solenoid Suppression: It's important to note that there is no built-in contact or solenoid suppression within the contact outputs. As a result, users must take responsibility for incorporating external solenoid suppression mechanisms in the circuit.
- Purpose of Solenoid Suppression: Solenoid suppression is used to manage or reduce voltage spikes or transients that can occur when a solenoid or relay coil is switched off. These spikes can potentially harm the contacts within the relays, leading to damage or reduced operational lifespan.
- Adding External Suppression: Users are advised to add external solenoid suppression devices or components to the circuits connected to these contact outputs. These suppression mechanisms could include diodes, transient voltage suppressors, or other appropriate devices that help mitigate the effects of voltage spikes and protect the relays and their contacts.
- Careful Handling and Compliance: To ensure the longevity and proper functioning of the relays and contact outputs, following the manufacturer's guidelines, wiring instructions, and recommended suppression techniques is crucial. Careful handling, proper installation, and compliance with safety standards are essential to prevent damage and maintain system reliability.
The WOC team is always available to help you with your Mark VIe requirements. For more information, please contact WOC.
Frequently Asked Questions
What is IS200TREAH1ADC?
It is a turbine emergency trip terminal board developed by GE under the Mark VIe series.
What is the role of jumpers JP1 and JP2 on the terminal board?
Jumpers JP1 and JP2 serve the purpose of selecting the fanning configuration for the X section passive speed pickups to the S and T section PPROs within the system.
How do jumpers JP1 and JP2 affect the fanning of speed inputs?
Placing the jumper over the pin pairs of JP1 and JP2 facilitates the fanning of the 3 X section passive speed pickups to the other sections, specifically to the S and T sections of the TMR system.
How does the placement of the jumper affect the fanning of speed inputs?
By placing the jumper over the pin pairs, it establishes a connection that allows the speed inputs from the 3 R section to be fanned out or duplicated to the other two TMR sections (S and T sections). This configuration ensures uniformity in speed input across the multiple sections of the system.
Why is the fanning of speed inputs important?
Fanning the speed inputs helps maintain consistency and redundancy in speed monitoring across various sections of the system. This redundancy is crucial for system reliability and safety, ensuring that multiple sections receive the same speed input signals for effective monitoring and control.
