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The 3300/45-02-02-03-00 is a high-integrity dual-channel differential expansion monitor for the Bently Nevada 3300 series rack system. It is specifically engineered to measure axial displacement between a turbine rotor and its casing, providing...
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The 3300/45-02-02-03-00 is a high-integrity dual-channel differential expansion monitor for the Bently Nevada 3300 series rack system. It is specifically engineered to measure axial displacement between a turbine rotor and its casing, providing critical protection during thermal expansion and load transients. By continuously tracking relative movement, the module prevents internal contact between rotating blades and stationary components, ensuring operational safety and machinery longevity.
This configuration supports redundant or multi-point measurements, with field-programmable voting logic and high-reliability relay outputs for interfacing with emergency shutdown systems (ESD).
| Specification | Description |
|---|---|
| Model Number | 3300/45 |
| Full Part Number | 3300/45-02-02-03-00 |
| Primary Function | Differential expansion monitoring (rotor vs. stator) |
| Transducer Compatibility | 8 mm, 11 mm, and 25 mm Proximitor systems |
| Input Channels | 2 independent channels (dual-channel monitoring) |
| Full-Scale Range | Selectable: ±2.0 mm to ±10 mm (custom configurations possible) |
| Accuracy | ±1% of full-scale range at room temperature |
| Relay Outputs | High-reliability hermetically or epoxy-sealed relays (Configuration -03) |
| Power Consumption | 3.5 W nominal |
| Operating Temperature | -20°C to +65°C (-4°F to +149°F) |
Axial displacement monitoring in steam turbines (HP & LP sections)
Ensuring rotor blades do not contact stationary diaphragms during startup or thermal ramps
Industrial compressors or other rotating machinery with significant thermal growth
Redundant monitoring setups where safety and early warning are critical
Why use dual-channel monitoring instead of single-channel?
Dual channels provide redundant or complementary data, enabling 2-out-of-2 voting logic to prevent nuisance trips caused by a single sensor failure.
Offers a complete picture of rotor axial movement for enhanced turbine protection.
Can the full-scale range be adjusted after installation?
Yes, the module supports adjustable full-scale ranges.
Adjusting the range requires recalibration of Proximitor sensors and verification of the voltage-to-displacement slope to maintain measurement accuracy.
