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

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

Product Description

The 3300/45-02-01-03-00 is a high-precision dual-channel differential expansion monitor from the Bently Nevada 3300 series. It measures the relative axial displacement between a turbine rotor and its stationary casing, ensuring that thermal...

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SKU: 3300/45-02-01-03-00
Vendor: Bently Nevada
Category: Dual Differential Expansion
Related Series:

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Product Description

The 3300/45-02-01-03-00 is a high-precision dual-channel differential expansion monitor from the Bently Nevada 3300 series. It measures the relative axial displacement between a turbine rotor and its stationary casing, ensuring that thermal expansion does not compromise internal clearances. This module is critical for turbine supervisory instrumentation (TSI), preventing mechanical contact and structural damage during startup and operation.

It converts analog signals from proximity transducers into precise digital data and 4–20 mA outputs for integration with PLCs or DCS systems. Designed for continuous industrial operation, the module includes robust diagnostics and configurable alarm setpoints.

Technical Specifications

Specification Description
Model 3300/45
Full Order Code 3300/45-02-01-03-00
Module Function Dual-Channel Differential Expansion Monitoring
Signal Accuracy Typical: 0.33% FS / Max: ±1.0% FS
Output Signal 4–20 mA DC proportional output
Alarm Configuration Digitally adjustable setpoints (0–100% FS)
Power Requirement 24 VDC (via 3300 system rack)
Operating Temperature -40°C to +70°C 

Application Scenarios

  • Monitoring axial clearances in HP and IP turbine sections

  • Real-time supervision during turbine startup and thermal ramp-up

  • Integration into Turbine Supervisory Instrumentation (TSI) for critical assets

  • Preventing rotor-to-stator contact and reducing unplanned downtime

Differential Expansion FAQ

How does it assist during turbine startup?

  • The rotor expands faster than the casing during heat-up. The module monitors the gap in real-time and triggers alarms or trip outputs if limits are exceeded.

What does the "-03" designation indicate?

  • Specifies the relay configuration, often including hermetically or epoxy-sealed high-reliability relays for alarm and trip outputs.