Bently Nevada 330930-65-03-05 3300 NSv Extension Cable

Description

The 330930-65-03-05 functions as a low-loss, constant-impedance coaxial transmission line designed to link a 3300 NSv eddy-current proximity probe to a 3300 XL NSv Proximitor Sensor. This physical electrical link is a core component within the 3300 XL NSv Proximity Transducer System, optimized for critical rotating machinery protection paths where severe mechanical envelope restrictions or narrow target profiles rule out larger proximity sensor systems. The cable bridges the gap between the internal sensing coil located at the bearing hub and the external driver electronics, transmitting high-frequency radio frequency (RF) signals and analog displacement measurements with negligible signal attenuation or phase distortion.

This specific product configuration features an integrated interlocking stainless steel armor sleeve wrapped over a standard fluoroethylene propylene (FEP) insulated core, shielding the internal electrical path from direct crushing forces, sharp surface shearing, and persistent contact with warm industrial lubricating oils. The 330930-65-03-05 configuration provides an electrical and mechanical link optimized for high-speed centrifugal air compressors, industrial refrigeration compressors, and turbo-expanders. Configured with a total physical length of 6.5 meters and featuring standard miniature coaxial hardware terminal connections, it ensures complete electrical compatibility and system loop calibration tracking under general-purpose industrial deployments.

Features

• High-stability 75 ohm coaxial core insulated with premium fluoroethylene propylene (FEP) to maintain consistent loop capacitance.
• Rugged interlocking stainless steel armor sleeve delivering structural crush protection and severe mechanical abrasion resistance.
• Precision-machined, gold-plated brass ClickLoc coaxial connectors ensuring an oil-tight, vibration-proof mechanical joint lock.
• Factory-installed clear fluoroethylene propylene (FEP) outer jacket covering the steel armor layer to prevent fluid ingress and structural corrosion.
• Direct drop-in system compatibility with legacy 3300 RAM transducer loops and 190 series monitor processing panels.

Applications

• High-vibration extension links routing from internal fluid-film bearings out to external junction boxes on centrifugal compressors.
• Structural protection loops running through oil-saturated gear housings on compact process gas machinery and industrial expanders.
• Dynamic radial shaft vibration and axial position measurement interconnects on machinery with severe spatial access restrictions.

Mechanical Profile & Exact Weight Formulas

In predictive maintenance documentation, estimated mass figures are insufficient for rigorous conduit fill or support design. Following the physical constants specified in the official Bently Nevada 147385 datasheet, the physical geometry and cumulative dry mass metrics for this specific 6.5-meter armored extension cable are calculated below:

• Total Cable Physical Length (Option AAA): Exactly 6.5 meters (21.3 feet) measured end-to-end between terminal connector reference planes.
• Linear Mass Density of Armored Cable Core: Nominal 64 grams per meter (0.70 oz/foot) driven by the cumulative mass of the internal coaxial cable and the interlocking stainless steel armor wrap.
• Net Cable Body Mass: Calculated as Linear Mass Density multiplied by Total Length (64 g/m x 6.5 m) = 416 grams (14.67 oz).
• Connector Hardware Contribution: Approximately 20 grams (0.71 oz) total for the pair of premium gold-plated brass ClickLoc coaxial terminal fittings and localized strain-relief crimp assemblies.
• Total Net Component Weight: Calculated as 416 g (cable body) + 20 g (connectors) = 436 grams (15.38 oz) absolute dry weight per unit (excluding heavy cardboard and plastic external field shipping materials).

Ordering Information

Technical Specifications

Connections/Interfaces

Installation Guidelines

• Total Loop Matching Rule: This 6.5-meter extension cable must be combined with a 0.5-meter physical length proximity probe to construct a 7.0-meter total system loop. The total combined length must match the factory calibration marking specified on the host 3300 XL NSv Proximitor Sensor to avoid scale factor drift.
• Bend Radius Constraints: Do not bend the armored cable assembly tighter than the absolute minimum bend radius of 25.4 mm (1.0 inch). Forcing structural creases or tighter turns can permanently distort the inner dielectric spacing, resulting in calibration drift.
• Electrical Ground Isolation: Ensure that the miniature coaxial ClickLoc connection unions do not contact metallic junction box bodies or surrounding conduit lines. Protect the mated connector joint using self-fusing silicone tape insulation.
• Conduit Pulling Precautions: When routing the cable assembly through physical field conduits or bulkheads, pull the cable by the armored sleeve profile only. Do not apply tensile pull force directly to the gold-plated ClickLoc connector heads or crimped termination points.