3300/45-02-01-03-00 | Bently Nevada Dual Channel Differential Expansion Monitor

Overview

The Bently Nevada 3300/45-02-01-03-00 Dual Differential Expansion Monitor is designed to measure the relative expansion between a machine’s rotor and casing, preventing thermal distortion and mechanical damage. By continuously tracking thermal growth or contraction, it safeguards turbines, compressors, and other rotating assets against excessive axial displacement. The module provides high-precision measurement and integrates easily with control or protection systems, ensuring stable operation and reduced downtime.

Technical Specifications

• Model Number: 3300/45-02-01-03-00

• Product Type: Dual Channel Differential Expansion Monitor

• Manufacturer: Bently Nevada (GE Energy)

• Measurement Function: Rotor-to-casing differential expansion

• Input Channels: Two independent channels

• Compatible Sensors: 3300 Series 5 mm or 3300XL 8 mm proximity probes and extension cables

• Signal Accuracy: ±1% of full-scale output

• Output Signal: 4–20 mA for integration with PLC/DCS or monitoring systems

• Alarm Configuration: Adjustable Alert and Danger setpoints (0–100% of full scale)

• Power Supply: 24 VDC nominal

• Input Voltage Range: -17.5 VDC to -26 VDC (non-incendive circuit)

• Current Consumption: ≤12 mA

• Frequency Response: 10 Hz to 1 kHz

• Operating Temperature: -40 °C to +70 °C (-40 °F to +158 °F)

• Construction: Industrial-grade design with EMI/RFI shielding

• Compliance: API 670 and ISO 10816

• Country of Origin: USA

Key Features

• Precise Expansion Measurement: Accurately monitors rotor and casing displacement to prevent thermal damage.

• Dual-Channel Configuration: Provides independent monitoring for redundant or cross-axis applications.

• Flexible Integration: 4–20 mA analog output simplifies connection with protection and control systems.

• Wide Voltage Range: Operates reliably in non-incendive and hazardous-rated environments.

• High Reliability: Built for continuous duty with low power consumption and strong electromagnetic immunity.

• Configurable Alarms: Digital adjustment enables precise fault threshold tuning.

Application Scenarios

The Bently Nevada 3300/45-02-01-03-00 module is widely used in:

• Steam and gas turbines

• Compressors and expanders

• Large generators and pumps

• Equipment requiring precise axial displacement measurement

It plays a key role in machinery protection systems where rotor thermal expansion must be closely controlled to maintain alignment and efficiency.

FAQ

Q1: What is the function of a differential expansion monitor?
It measures the relative movement between the rotor and casing due to temperature changes, preventing contact or misalignment.

Q2: Can this module operate with older Bently Nevada 3300 systems?
Yes, it is fully compatible with standard 3300 racks and existing proximity probe configurations.

Q3: What sensors are recommended?
Use Bently Nevada 3300 Series 5 mm or 3300XL 8 mm proximity probes and matching extension cables for optimal accuracy.