Bentley Nevada 3300/47 Diferential Expansion Monitor Module

The Bentley Nevada 156997‑11 is a differential expansion monitoring module used in steam turbine protection systems. It measures the thermal growth difference between the rotor and casing, providing essential protection against turbine rubs, contact damage, and overshoot conditions. This module belongs to the 3300‑series infrastructure and is installed in a compatible 3300 rack system. Technical Specifications Model: 3300/47 Function: Differential expansion measurement for steam turbines (Ramp‑type DE monitor) System Compatibility: Bently Nevada 3300 rack system (with matching I/O module) Measurement Type: Axial differential expansion (rotor vs. casing growth) Inputs: Proximity‑type transducer signals (eddy current probes) Display: Front‑panel analog bargraph with status indicators (OK / Bypass / Alarm) Alarms: Configurable Alert and Danger alarm setpoints (per 3300/46 documentation) Calibration: Front‑panel test jacks & DIP‑switch adjustable gain/meter calibration Operating Temperature: As defined by 3300‑series monitor specs (typical industrial range) Applications: Steam turbines, compressors, high‑value rotating equipment; protects against thermal expansion hazards Installation: Slides into 3300 rack; uses matching rear I/O connector module Manufacturer: Bently Nevada / Baker Hughes Country of Manufacture: USA Please review pictures carefully and let us know if you have any questions!