The Bently Nevada 330930-045-00-CN serves as the primary 330930 Extension Cable utilized to execute non-contacting displacement and vibration signal transmission across 3300 NSv Proximity Transducer System platforms. This coaxial cable acts as the electrical link matching the proximity probe to the Proximitor Sensor unit, maintaining electrical impedance parameters required for high-frequency RF transmission. It delivers low-attenuation pathing for raw analog signals without introducing phase errors or calibration distortions into the measurement circuit.

Model Options Selection Matrix

The alphanumeric suffix codes define the specific cable length, mechanical protection options, and regional compliance certifications for the assembly:

• 330930: Base model registration for the 3300 NSv Extension Cable (75 Ohm coaxial architecture).

• 045: Cable Length option. Specifies a nominal length of 4.5 meters (14.8 feet).

• 00: Connector and Cable Protection option. Standard coaxial cable configuration without stainless steel armor mesh.

• CN: Agency Approval option. Formally designated for localized hazardous area standards and GB/T compliance infrastructure in China.

Core Physical and Electrical Parameters

Proximity Loop Impedance and Scaling Stability

The 3300 NSv extension cable maintains the high-frequency matching necessary for eddy-current probe scaling when linking the 3.2 mm tip transducer to the Proximitor. System tuning relies on total physical length stability; mismatching cable lengths alters the resonant parameters and disrupts gap voltage validation target zones, which are calibrated around -10 VDC. Furthermore, the high-density shielding layer provides cross-talk suppression and blocks electro-magnetic noise fields generated by nearby running machinery, ensuring clean replication of rotor dynamics at the monitoring rack.

Package Shipping List

• 1 Bently Nevada 330930-045-00-CN Coaxial Extension Cable (4.5 meter length).

• 1 Silicone protection sleeve for ClickLoc connector links.

• 1 Installation sheet with technical schematic references.

Field Layout and Installation Constraints

Structural Routing Parameters

• Enforce a minimum physical bend radius threshold of 25.4 mm (1.0 inch) to prevent internal dielectric deformation.

• Do not rout the coaxial cable path alongside or inside the same conduit as high-voltage AC lines.

• Ensure the ClickLoc connection joints are securely clicked together and covered with the connector sleeve.

Grounding and Shielding Guidelines

• Keep the extension cable shield isolated from the machine housing or structural conduit tracking.

• Terminate the cable shield network to the instrumentation earth ground at the Proximitor panel only.

• House any middle connection nodes inside weatherproof terminal boxes to eliminate liquid ingress risks.

Technical Performance FAQ

• Can a 4.5 meter extension cable be swapped with a 4.0 meter version in a live 3300 NSv loop?

  No. The Proximitor sensor is calibrated to a specific total loop length; changing cable length alters electrical parameters and ruins the system's eddy-current probe scaling.

• What happens if the coaxial cable is bent past its minimum 25.4 mm bend radius limit?

  Bending past the limit compresses the internal insulation layer, changing local impedance and introducing voltage reflections that manifest as artificial vibration signals.

• Does this passive extension cable require external power or a dedicated backplane current supply?

  No. The cable is a fully passive transmission medium that carries the high-frequency RF signal provided directly by the connected Proximitor driver.

• What is the primary function of the shield layer within this high-frequency transducer network?

  The shield provides cross-talk suppression and blocks external radio frequency noise from distorting the gap voltage validation metrics.

• Can the cable connections be uncoupled and reattached while the main monitoring rack is energized?

  Yes. This component supports hot-swapping or disconnects at the field junction because it handles low-voltage analog signals with zero risk to the central rack.

• How does the CN suffix code affect the physical or electrical build of the cable material?

  The CN designation certifies that the product matches localized hazardous area installation standards without changing the base electrical architecture or physical dimensions.

• Will direct exposure to hot synthetic lubricating oils break down the outer cable jacket?

  No. The FEP fluoropolymer outer jacket resists degradation when exposed to industrial turbine oils, chemicals, and moisture up to +177 deg C.

• How do you verify if a ClickLoc connection has been completely and correctly locked during assembly?

  A proper physical connection gives a distinct tactile click and mechanical stop, preventing separation from normal cable weight or minor pulling forces.