The Bently Nevada 330930-040-00-00, also cataloged as the 3300 XL Standard Extension Cable, operates as a dedicated hardware component for high-frequency signal transmission between proximity probes and Proximitor sensors within 3300 XL Transducer System networks.
Suffix Breakdown & Model Matrix
The part number structure defines the physical length, protective armoring, and agency approval options for the extension cable assembly:
- 330930: Base Model for 3300 XL Standard Extension Cable
- 040: Cable Length Option - 4.0 meters (13.1 feet)
- 00: Connector and Cable Option - Without stainless steel armor
- 00: Agency Approval Option - Not required
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 330930-040-00-00 |
| Brand | Bently Nevada |
| Origin | USA |
| Weight | 2.0 kg |
| Dimensions | 4.0 meters (13.1 feet) length |
| Operating Temp | -51 to 177 deg C (-60 to 350 deg F) |
| Power Consumption | Passive physical conductor (zero power dissipation) |
| Cable Type | Standard coaxial extension cable |
| Connector Type | ClickLoc miniature coaxial connectors |
| Stainless Steel Armor | Option 00 (Without stainless steel armor) |
| Agency Approval | Option 00 (Not required) |
Rotor Dynamics & Gap Voltage Validation
The 3300 XL extension cable transmits raw radio-frequency signals between the proximity probe and the Proximitor sensor, maintaining matched impedance across the transducer circuit. Correct total system length (combining probe cable and extension cable to match 5-meter or 9-meter sensor tuning) is critical for precise eddy-current probe scaling and rotor dynamics monitoring. Field commissioning requires verifying the physical probe clearance via gap voltage validation, ensuring the Proximitor output delivers a nominal -10 VDC baseline target under static shaft conditions before dynamic signal logging.
Frequently Asked Questions
Q: How does total cable length impact signal calibration in the 3300 XL proximity system?
A: The Proximitor sensor is factory-calibrated to a specific total circuit length (5.0 m or 9.0 m). Deviating from the specified extension cable length shifts system capacitance and compromises linear sensitivity calibration.
Q: What connector maintenance is required for ClickLoc coaxial fittings during field installation?
A: Connectors must remain free of oil, moisture, and conductive debris. Hand-tighten until the ClickLoc mechanism fully latches, and apply silicone sealing tape or protective boots where liquid exposure is present.
Field Installation Guidelines
- Routing Path: Route the 4.0-meter extension cable through dedicated instrument conduit or cable trays away from high-voltage motor power leads to avoid electrical noise coupling.
- Minimum Bend Radius: Observe a strict minimum bend radius during installation to prevent deformation of the inner coaxial dielectric layer.
- Connector Mating: Inspect the ClickLoc miniature coaxial connectors for contamination before joining. Push and twist until positive mechanical latching is achieved.
- Shield Grounding: Ensure proper isolation of cable shields along the run, grounding the overall shield solely at the monitor panel terminal block to eliminate ground loop interference.
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