Description

The Bently Nevada 3300/20-13-03-01-00-00 serves as the primary 3300/20 Dual Thrust Position Monitor utilized to execute shaft axial position tracking across 3300 Machinery Protection System platforms. It continuously monitors two independent channels of shaft axial movement relative to internal thrust bearing clearances, processing analog transducer inputs to protect against thrust bearing breakdown.

Hardware Specifications

Machinery Monitoring and TSI Integration

The 3300/20-13-03-01-00-00 monitor module measures raw high-frequency sensor signals without causing data distortion across neighboring Turbomachinery Instrumentation (TSI) slots. Specifically, the processing card enforces precise eddy-current probe scaling and maintains strict gap voltage validation (-10 VDC targets) across both proximity loops. Consequently, this method stabilizes the reference baseline and protects the circuit from sudden signal drift.

Furthermore, the underlying electrical architecture provides total channel-to-channel isolation to reinforce cross-talk suppression between probe pairs. As a result, rapid shifts in rotor dynamics do not generate induction anomalies inside the measurement circuits. The system executes an internal AND voting logic pattern configuration. Subsequently, it updates the safety relay coils only when both proximity probes simultaneously register a verified thrust clearance violation.

Frequently Asked Questions

Q: Why does Bently Nevada mandate the use of dual-probe AND voting for this thrust monitor?

A: Single proximity probes can interpret an out-of-range gap voltage failure as actual physical shaft movement. Therefore, configuring the module for dual-probe AND voting prevents a solitary transducer error from triggering an unwanted, false machine shutdown.

Q: What action does the module execute if an internal circuit fault occurs on a single channel?

A: The monitor illuminates the front panel Not OK LED indicator instantly. Simultaneously, it clamps the affected channel’s recorder output to a low fault level and inhibits that specific channel’s relay contribution to protect system automation tracking.

Field Installation Guidelines

1. Slide the 3300/20-13-03-01-00-00 module directly into the assigned slot of the powered-down 3300 system rack framework.
2. Press the card faceplate forward until the rear pin assemblies completely connect into the system backplane bus interface.
3. Tighten the hardware retaining screws to 0.7 N-m. Thereafter, check that the faceplate makes solid grounding contact with the metal rack enclosure.
4. Separate all low-voltage proximity transducer cabling from high-power AC power cables. In doing so, maintain a minimum 30 cm spatial separation to prevent electromagnetic noise induction.
5. Terminate the shield drain wires of the field cable to the main instrument panel ground strip. Finally, apply system power to perform zero-point position calibration adjustments.