Bently Nevada 330930-045-01-CN 3300 NSv Armored Extension Cable

Product Overview

The 330930-045-01-CN is a high-performance extension cable specifically engineered for the Bently Nevada 3300 NSv (Narrow Side view) proximity transducer system. The NSv series is the industry standard for vibration and position monitoring in confined spaces or on small-diameter shafts where standard probes would suffer from side-viewing interference. This cable provides the critical electrical link between the NSv probe and the Proximitor sensor, maintaining the precision impedance required for accurate eddy-current measurements. Ideal for aero-derivative gas turbines, centrifugal compressors, and small steam turbines, the 330930-045-01-CN features ruggedized armoring and chemical protection, ensuring maximum signal integrity and machine uptime in the most volatile industrial environments.

Suffix Breakdown

The model 330930-045-01-CN is configured with specific mechanical and regional protection layers:

• 330930: 3300 NSv Extension Cable series.
• 045: Cable Length Option – 4.5 meters (14.8 feet).
• 01: Connector and Cable Option – Equipped with stainless steel armor for mechanical protection, plus an external FEP (Fluoroethylenepropylene) jacket for superior chemical and moisture resistance.
• CN: Agency Approval Option – Country-specific approvals for the China market, ensuring compliance with local hazardous area and industrial safety regulations.

Technical Specifications

Technical FAQs

How does the FEP jacket (Option 01) differ from the standard armored cable?
While the stainless steel armor provides mechanical protection against crushing, the FEP jacket provides an additional layer of protection against environmental contaminants. It prevents corrosive fluids, moisture, and oils from penetrating the armor braids and reaching the internal coaxial cable, significantly extending the cable's lifespan in harsh chemical environments.

Can I use this 330930 cable with a 3300 XL 8 mm probe?
No. The 3300 NSv system is electrically distinct from the 3300 XL series. The NSv cable is tuned to the specific inductance and capacitance requirements of the NSv probe and Proximitor. Interchanging them will lead to incorrect vibration readings and potential "Not OK" status at the monitoring rack.

What is the importance of the total system length?
Bently Nevada proximity systems are calibrated as a complete loop (Probe + Extension Cable). A 4.5-meter cable is typically paired with a 0.5-meter probe to achieve a 5.0-meter system length. Using a cable length that does not match the Proximitor sensor's calibration will cause a significant scale factor error.

Engineering & Installation Guide

• Chemical Protection: The FEP jacket is highly resistant to most industrial solvents and fuels. Ensure the jacket is inspected for tears during installation. Any breach in the FEP layer can allow fluids to wick into the armor, potentially leading to signal degradation or ground faults.
• Connector Integrity: Always use the ClickLoc connector system properly. When mating the probe lead to the extension cable, you should feel a distinct "click" indicating the gold-plated pins are fully seated. Failure to secure the connection can lead to intermittent signal loss, especially in high-vibration machinery.
• Grounding Protocols: The stainless steel armor should be electrically isolated from the machine casing and only grounded at the Proximitor sensor end. This prevents ground loops, which are a common source of electrical noise in vibration signals.
• Mechanical Routing: Avoid routing the armored cable across sharp metal edges or in areas where it may be pinched by moving machinery components. Despite the armor, the internal coaxial dielectric can be crushed, which changes the cable's impedance and invalidates the sensor calibration.