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3300-45-08-03-01-00
3300-45-08-03-01-00
3300-45-08-03-01-00

Bently Nevada 3300-45-08-03-01-00 3300/45 Differential Expansion Monitor

  • Model: 3300-45-08-03-01-00
  • Brand: Bently Nevada
  • Series: 3300 Monitoring System
  • Core Function: Differential expansion measurement
  • Product Type: Dual Differential Expansion Monitor
  • Key Specs: Accepts proximity transducer inputs, alarm relays
  • Condition: New Original / New Surplus
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Description

3. Key Technical Specifications

  • Channels: Dual (two independent channels)
  • Input Type: Proximity transducers for differential expansion
  • Measurements: Differential expansion (DE) between rotor and casing
  • Alarm Outputs: Alert and Danger setpoints per channel
  • Recorder Outputs: 4-20 mA proportional signals
  • Display: LCD for local indication
  • Power: Supplied via 3300 rack
  • Mounting: 3300 series rack slot
  • Applications: Steam turbines and large rotating machinery

4. Product Introduction

The Bently Nevada 3300-45-08-03-01-00 is a Dual Differential Expansion Monitor for the 3300 series. It continuously measures the relative growth between the rotor and stator (casing) using proximity transducer inputs.

This monitor is critical for large turbines where thermal expansion differences can cause rubbing or misalignment if not properly tracked. It provides both local display and relay outputs for protection. Configure setpoints carefully based on OEM clearance data and verify transducer installation for accurate readings.

3300-45-08-03-01-00
3300-45-08-03-01-00
3300-45-08-03-01-00
3300-45-08-03-01-00

5. Troubleshooting Quick Reference

Symptom Possible Cause Relevance to this Part Quick Check Method Recommendation
No DE reading Transducer gap issue ✅ High Measure gap voltages on both channels Set to nominal operating gap
False alarms Incorrect setpoints ✅ High Compare live values to configured alarms Adjust per machine thermal profile
Erratic values Probe wiring or mounting ✅ Medium Inspect cables and probe attachment Secure mounting and check continuity
No relay action Logic or contact config ✅ Medium Test relay outputs manually Verify wiring to shutdown system
Module fault Rack power or slot ✅ Low Check power LEDs and reseat module Confirm rack supply voltage

Capture trend data, gap voltages, and alarm logs when contacting support.

6. Frequently Asked Questions (FAQ)

What is differential expansion and why monitor it? It measures the axial growth difference between the turbine rotor and casing. Excessive DE can lead to blade rubbing and serious damage.

How many channels does this monitor provide? Dual channels for redundant or multi-location monitoring on the same machine.

Is this compatible with 3500 systems? The 3300 series is legacy but still widely supported. Migration to 3500/45 Position Monitor is common for newer installations.

What transducers are used? Standard 3300 XL proximity probes mounted to measure casing versus rotor position.

Can alarms be set independently per channel? Yes. Alert and Danger setpoints are programmable per channel.

Is the unit hot-swappable? In 3300 racks, modules can often be replaced with the system online, but follow safe procedures to avoid unintended trips.

What warranty is offered? 1-year warranty on functional performance. New surplus stock with inspection and basic testing completed.

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