Configured for high-frequency signal transmission in 3300 XL NSv system networks, the Bently Nevada 330930-040-00-00 (330930 Extension Cable) provides direct physical/electrical execution.

Suffix Nomenclature and Model Options

• 330930: Base catalog code designation for the 3300 NSv series extension cable component.
• 040: Specifies a total physical cable length parameter of 4.0 meters (13.1 feet).
• 00: Denotes construction executed without secondary stainless steel outer armor.
• 00: Indicates that no specialized hazard agency approval options are included.

Hardware Specifications

Eddy-Current Probe Scaling and Rotor Dynamics Tracking

The 75 Ohm coaxial extension cable preserves high-frequency analog signals between the NSv probe and the Proximitor sensor, sustaining the 7.87 V/mm (200 mV/mil) average scale factor. This maintains strict gap voltage validation (-10 VDC targets) during low-amplitude rotor dynamics monitoring, ensuring reliable cross-talk suppression and accurate displacement measurements across small mechanical targets.

Supply Package Inventory

• 1 x 330930-040-00-00 3300 NSv 4.0 Meter Extension Cable
• 1 x Terminal Protection Cap Set

Field Installation Guidelines

• Coaxial Routing and Bending Limits
  • Route the unarmored 4.0-meter cable through dedicated instrument trays, keeping it completely separated from high-voltage motor power lines.
  • Maintain a safe mechanical bend radius along all installation corners to prevent internal conductor deformation or impedance shifts.
• Connector Terminal Security
  • Thread the coaxial connectors manually until firmly seated to protect the internal signal pins from loosening under continuous machine vibration.
  • Verify that connector sleeves remain dry and free of particulate contamination during terminal attachment to prevent signal ground faults.

Engineering Technical FAQ

• What nominal impedance characteristic does the 330930-040-00-00 extension line maintain?

  The signal line utilizes a strict 75 Ohm coaxial architecture to match the characteristic impedance of the 3300 NSv monitoring loop.

• How does the absence of stainless steel armor affect the physical routing requirements?

  Without outer metal shielding, the cable requires installation inside protective conduits or trays to prevent mechanical abrasion in harsh areas.

• Can this 4.0-meter extension cable be paired interchangeably with standard 8 mm 3300 XL Proximitor modules?

  No, NSv cables require dedicated NSv series Proximitor components and probes to maintain proper electrical calibration and scale factors.

• What dielectric material encases the internal conductor of this specific extension cable model?

  The internal core is insulated using high-grade fluoroethylenepropylene (FEP) to withstand extreme thermal operating ranges.

• What operating temperature range is certified for this fluoroethylenepropylene-insulated cable?

  The assembly supports a continuous operating temperature range spanning from -52 deg C up to +177 deg C (-62 deg F to +351 deg F).

• What electrical symptom develops if moisture enters the miniature coaxial connection interface?

  Fluid contamination alters line impedance, degrading eddy-current probe scaling accuracy and generating erratic voltage fluctuations in the TSI panel.

• Does this extension cable draw active electrical power from the monitoring rack backplane?

  No, it functions as a passive transmission medium, carrying radio frequency excitation voltage and return signals without consuming power.

• How does total loop length affect the system calibration when using a 4.0-meter extension cable?

  The system is calibrated for a specific total electrical length (such as 5 or 9 meters total combination), requiring matched probe and cable lengths.