24765-01-00 Bently Nevada Case Expansion Transducer Assembly

Overview

The Bently Nevada 24765-01-00 Case Expansion Transducer Assembly is designed for precise measurement of turbine casing thermal growth, a critical parameter in Turbine Supervisory Instrumentation (TSI). This assembly monitors the thermal expansion of the machine case relative to its foundation during startup and operation. Typically installed on the opposite end of the turbine casing, the system provides essential data that ensures the machine’s safety and optimal performance.

Key Features

• Dual Transducer Arrangement: Provides reliable measurement of case expansion and alerts when machine feet or casing are misaligned.
• High Temperature Compatibility: Works seamlessly with the Bently Nevada 3500/45 Position Monitor for high-temperature applications.
• Weatherproof Enclosure: Ensures durability and functionality in harsh environments.
• Thermal Growth Measurement: Accurately tracks the machine casing’s expansion during startup and online operations.
• Position Feedback: Dual configuration enables feedback on the machine’s thermal growth rate and potential risks like foot obstruction.

Technical Specifications

• Manufacturer: Bently Nevada
• Product Number: 24765-01-00
• Type: Case Expansion Transducer Assembly (DC)
• Linear Range: 0 – 25.4 mm (1.00 in)
• Spring Option: Without spring return
• Scale Factor: 0.346 V/mm (8.79 V/in)
• -3 dB Frequency: 20 Hz
• Linearity: ±0.5% full range
• Stability: 0.125% full scale
• Dimensions: 88.9 mm (Height) x 117 mm (Width) x 241 mm (Length)
• Weight: 2.3 kg (5.0 lbs)
• Environmental Protection: TYPE 4 weatherproof enclosure
• Application: Ideal for turbine case expansion monitoring in TSI systems.

Applications

• Turbine Supervisory Instrumentation (TSI): Ensures thermal growth alignment between turbine casing and rotor during startup and operation.
• Foundation Monitoring: Measures case expansion against the foundation, alerting when potential obstructions occur.
• Machine Performance Safety: Prevents damage from uneven thermal growth rates between the rotating and stationary parts.

Frequently Asked Questions (FAQ)

1. What is case expansion measurement used for?
   • Case expansion measures the thermal growth of the turbine casing to ensure smooth operations during startup and monitor the machine’s safety.
2. Is the 24765-01-00 transducer compatible with all Bently Nevada monitors?
   • The transducer works with the 3300 or 3500 series monitors, providing vital information and alarms when used in dual transducer configurations.
3. Can the Case Expansion Transducer handle high-temperature environments?
   • Yes, the transducer is designed for high-temperature conditions and is compatible with the 3500/45 Position Monitor in such environments.
4. How does the case expansion transducer work?
   • The LVDT (Linear Variable Differential Transformer) inside the transducer measures thermal growth, providing output for monitoring and alarms.
5. What is the significance of dual transducer configurations?
   • The dual configuration helps detect potential machine foot misalignment and prevents mechanical damage by providing real-time case expansion data.

Check official datasheet for more detailed information: Case Expansion Transducer Systems