Description
Product Overview
176449-06 (3500/46M) is a 4-channel hydro dedicated monitor module within Bently Nevada 3500 TSI machinery protection system. It is specially optimized for hydroelectric turbine monitoring, accepting signals from proximity probes, seismic vibration sensors, air gap sensors and 350300 dynamic pressure transducers. The module processes vibration, shaft position, air gap and hydraulic pulsation data, compares measured values with configurable alert/danger thresholds, provides protection alarm and trip outputs, and transmits real-time data to System 1 condition monitoring software for hydraulic anomaly diagnostics such as cavitation, vortex rope and load zone instability.
Technical Specifications
| Item | Parameter |
|---|---|
| Manufacturer | Bently Nevada (Baker Hughes) |
| Part Number | 176449-06, Model 3500/46M Hydro Monitor |
| Product Type | 4-Channel Hydro Turbine Monitoring Module |
| Channel Count | 4 independent configurable input channels |
| Supported Sensors | Proximity probe, seismic transducer, air gap sensor, dynamic pressure transducer |
| Signal Types | Shaft vibration, radial position, air gap, static & dynamic pressure pulsation |
| Filter Range | User programmable frequency filters, 0.104Hz ~ 500Hz |
| Alarm Setting | Independent Alert and Danger threshold per channel |
| Power Source | Powered by 3500 rack backplane |
| Power Consumption | 7.7 W typical |
| Mounting | Hot-pluggable slot installation inside 3500 series rack |
| Operating Temperature | -30 °C ~ +65 °C |
| Humidity | 5%–95% RH, non-condensing |
| Net Weight | Approx. 0.91 kg |
| Certifications | CE, UL, CSA, API 670 compliant |
| System Compatibility | Bently Nevada 3500 rack, System 1 software |
Key Features
- Hydro Turbine Optimized Measurement: Dedicated algorithm for hydropower units, detects draft tube vortex, cavitation, pressure pulsation and air gap fluctuation, which standard vibration monitors cannot fully support.
- Multi-sensor Universal Input: One module can mix different sensor types, reducing the number of spare module types in hydro plant spare inventory.
- Configurable Alarm & Trip Logic: Each channel has independent Alert (warning) and Danger (protection trip) setpoints; relay interlock output for machinery protection.
- High Resolution Dynamic Signal Processing: Captures low-frequency hydraulic pulsation signals to analyze rotor-stator interaction and hydraulic instability.
- Built-in Sensor Diagnostics: Continuously detects probe cable break, short circuit and signal out-of-range faults, reports diagnostic codes to 3500 rack interface.
- Hot Swap Support: Can be replaced online in a running 3500 rack with proper operational permission, without shutting down the whole TSI system.
- Seamless System 1 Integration: Transmits waveform and trend data to System1 software for offline spectrum analysis and unit condition diagnosis.
Applications
- Hydroelectric turbine shaft vibration and air gap monitoring
- Draft tube dynamic pressure pulsation & cavitation monitoring
- Pump-turbine reversible unit condition and protection system
- Large water turbine generator TSI protection cabinets
- Centrifugal pump dynamic pressure monitoring in petrochemical industry
Installation & Maintenance Notes
- ESD anti-static protection must be used during module removal and installation.
- Install in designated slot of 3500 rack, ensure backplane connector fully seated.
- Separate low-level sensor signal wiring from high-current power cables to reduce EMI interference.
- Configure channel sensor type, filter parameters and alarm thresholds via 3500 configuration software during commissioning.
- Perform sensor loop test and alarm simulation during unit overhaul.
- Regularly check module LED status and fault logs in System1 software.
- Verify firmware version consistency before replacing 3500/46M spare module.
FAQ
Q: What is the difference between 3500/46M (176449-06) and standard 3500/42M vibration monitor? A: 3500/42M is for gas/steam turbine high-frequency vibration monitoring. 3500/46M is hydro dedicated, optimized for low-frequency hydraulic pulsation and air gap measurement for hydro turbines.
Q: What sensor is commonly paired with 3500/46M for dynamic pressure measurement? A: Bently Nevada 350300 dynamic pressure transducer, used to capture draft tube pressure fluctuation and cavitation signals.
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