Description
Bently Nevada 3300/45-03-02-00-00
Technical Specifications:
- Product Series: 3300 Series Machinery Protection System
- Module Type: Axial Position Monitor
- Input Compatibility: 3300 XL 8mm or 11mm proximity transducer systems
- Channel Configuration: Dual-channel for redundant axial position measurement
- Output: 4-20mA analog output, relay alarm outputs
Functional Features:
- Continuous monitoring of shaft axial position relative to thrust bearing
- Dual-channel configuration for redundant measurement and voting logic
- Programmable Alert and Danger alarm setpoints with latch options
- Compatible with 3300 and 3500 monitoring system platforms
- Supports gap voltage verification for installation validation
- Front panel indicators for OK, Bypass, and alarm status
Application Scenarios:
- Steam turbine thrust bearing position monitoring
- Centrifugal and axial compressor axial displacement monitoring
- Gas turbine rotor position monitoring
- Large motor thrust bearing wear detection
- Pump axial position monitoring in refineries and chemical plants
Performance Parameters:
- Input Signal Range: Proportional to proximity transducer output voltage
- Alarm Accuracy: Within ±0.13% of setpoint value
- Response Time: Fast response for real-time position tracking
- Operating Temperature: -30°C to +65°C
- Storage Temperature: -40°C to +85°C
Material Composition:
- Enclosure: Industrial-grade metal frame construction
- Internal Circuitry: Multi-layer PCB with precision analog-to-digital conversion and signal processing
- Connectors: Gold-plated contacts for reliable signal transmission
Structural Features:
- Full-height module for 3300/3500 series rack mounting
- Front panel with status LED indicators
- Rear I/O terminal block for field wiring
- Hot-swappable design for online replacement
Working Principle: The 3300/45 receives voltage signals from proximity probes mounted axially to measure the distance between the probe tip and the shaft thrust collar. The probe generates a high-frequency electromagnetic field, and as the conductive shaft surface moves axially, eddy currents are induced in the shaft material, changing the probe coil impedance. The proximitor converts this impedance change into a DC voltage signal proportional to the gap distance. The monitor processes this signal to determine the shaft axial position and compares it against programmed alarm thresholds. When axial displacement exceeds the Alert or Danger limits, relay outputs are activated to initiate protective actions.
Installation Requirements:
- Mount in a compatible 3300/3500 series equipment rack slot
- Use 3300 XL proximity transducer systems with proper system length matching
- Shielded three-conductor cable from proximitor to monitor, shield grounded at one end only
- Probes must be mounted with rigid mechanical support to prevent measurement error
- Gap setting must be verified using micrometer or dial indicator during commissioning
Usage Notes:
- Confirm sensor type and system length match the monitor configuration
- Verify gap voltage is within the specified range (typically -9VDC at 1.27mm gap for 8mm probes)
- Regularly check front panel LED indicators for normal operation
- Module supports hot-swap replacement without affecting other system modules
- Alarm thresholds must be set based on thrust bearing clearance specifications
- Signal cables must be routed away from power cables to avoid electromagnetic interference
