Bently Nevada 330730-040-03-00 Extension Cable

Bently Nevada 330730-040-03-00 3300 XL 11 mm Extension Cable

The Bently Nevada 330730-040-03-00, also cataloged as the 330730 Extension Cable, operates as a dedicated hardware component for high-frequency signal transmission within 3500 Machinery Protection Systems.

Suffix Breakdown & Model Matrix

• Base Part Number: 330730 (3300 XL 11 mm Extension Cable Assembly)
• Cable Length Option (-040): 040 = 4.0 meters (13.1 feet) cable length
• Connector & Cable Option (-03): 03 = Standard cable with connector protectors
• Agency Approval Option (-00): 00 = Not required / Standard non-approved variant

Hardware Specifications

Eddy-Current Probe Scaling and Rotor Dynamics

The Bently Nevada 330730-040-03-00 extension cable transmits high-frequency radio frequency signal responses between 11 mm proximity probes and remote 3300 XL Proximitor Sensors. The precise 75-ohm characteristic impedance and controlled capacitance ensure accurate eddy-current probe scaling (3.94 V/mm / 100 mV/mil scale factor) across dynamic rotor excursions. Integrated triaxial shielding provides high cross-talk suppression and maintains precise gap voltage validation (-10 VDC baseline settings) in high-EMI turbomachinery enclosures.

Frequently Asked Questions

Q: What total system length is achieved when pairing the 4.0-meter 330730-040 extension cable with a 1.0-meter 3300 XL 11 mm probe?

A: Pairing a 4.0-meter extension cable with a 1.0-meter probe forms a standard 5.0-meter proximity transducer system, matching the calibration curve of a 5.0-meter 3300 XL Proximitor Sensor.

Q: How do the installed connector protectors (-03 option) safeguard the ClickLoc coax joiners?

A: The connector protectors encapsulate the miniature coaxial ClickLoc interfaces in a flexible, moisture-resistant sleeve, preventing environmental contamination and ground loops caused by contact with metal conduit or bearing housings.

Field Installation Guidelines

• Inspect the coaxial ClickLoc connectors and protective rubber sleeves for cleanliness prior to mating.
• Align the extension cable male ClickLoc connector with the probe lead connector and push firmly until the internal detent mechanism latches with a tactile click.
• Slide the connector protector boot over the joined coaxial connection to seal the interface against moisture and oil penetration.
• Route the triaxial cable through dedicated metal conduit or cable trays, ensuring bend radii remain greater than 25.4 mm (1.0 in) to prevent coaxial shield deformation.
• Ensure the outer cable braid connects to system ground exclusively at the Proximitor Sensor terminal location to prevent earth current loops.