Bently Nevada 330930-065-00-05 3300 XL NSv Extension Cable

Product Overview

The 330930-065-00-05 (3300 NSv) is a high-performance extension cable specifically engineered for the Bently Nevada 3300 XL NSv (Narrow Side View) Proximity Transducer System. This system is the industry standard for monitoring centrifugal air compressors, refrigeration compressors, and other rotating machinery with extremely tight installation constraints. As a critical link between the NSv probe and the Proximitor Sensor, the 330930-065-00-05 ensures the transmission of high-fidelity displacement signals without impedance mismatch. Its 6.5-meter length is precisely tuned to provide the 200 mV/mil (7.87 V/mm) scale factor required for accurate radial vibration and axial position measurements on small-diameter shafts or targets.

Suffix Configuration Breakdown

According to the official Datasheet 147385, the model 330930-065-00-05 is defined by the following specific engineering options:

• 065 (Cable Length): 6.5 meters (21.3 feet). This length is typically combined with a 0.5-meter probe to create a 7.0-meter total electrical system.

• 00 (Connector Protector and Cable): Standard coaxial cable without stainless steel armor and without connector protectors. This version offers maximum flexibility for routing through dedicated conduit or internal machine housings.

• 05 (Agency Approval): Multiple Approvals (ATEX, IECEx, CSA). This certification allows the cable to be used in intrinsically safe (I.S.) applications within hazardous areas globally.

Technical Specifications

Engineering FAQs

Why is the NSv extension cable different from standard 3300 XL cables?

The NSv series is specifically designed for small targets and tight spaces. The electrical characteristics (inductance and capacitance) of the 330930 cable are tuned to match the NSv probe's smaller coil. Mixing NSv cables with standard 8mm probes will result in incorrect vibration readings.

What is the purpose of the ClickLoc connector?

The ClickLoc connector is a patented design that prevents the connection between the probe and extension cable from loosening due to machinery vibration. The gold-plating ensures a low-resistance contact that is essential for maintaining the system's precision scale factor.

Can I install this cable in an environment with turbine oil?

Yes, the FEP jacket is highly resistant to turbine oil and most process chemicals. However, since this specific variant (-00) does not have a connector protector, you must ensure the connection point is either sealed with the provided silicone tape or located in a dry area to prevent oil from entering the connector.

Field Installation and Maintenance Directives

• Connection Integrity: Before connecting the ClickLoc connectors, verify they are clean and dry. Use a lint-free cloth. Do not use pliers to tighten the connectors; they are designed to be finger-tightened until they "click" into a locked state.

• Bend Radius Constraints: Maintain a minimum bend radius of 25.4 mm (1 inch). Sharp bends can damage the internal coaxial shielding and dielectric, leading to "signal spiking" or a "Not OK" status on the 3500 monitor.

• Proper Cable Support: Use high-quality cable ties or clamps to secure the cable every 1 to 2 feet. Ensure that the cable is not under tension at the connector ends. Vibration-induced stress on unsupported cables is a leading cause of premature failure in proximity systems.

• System Matching: Always verify that the total length of the probe plus the extension cable matches the configuration of the Proximitor Sensor (e.g., a 7m Proximitor requires a total cable length of 7m). The 330930-065 is part of a 7.0-meter system when used with a 0.5-meter probe.