Product Overview

The Bently Nevada 330930-060-00-05 is a high-performance 3300 NSv Extension Cable engineered for critical proximity transducer systems. The 3300 NSv (Near Surface void) platform is specifically optimized for machinery configurations where tight mounting clearances, small target sizes (less than 9.5 mm), or narrow linear ranges restrict the deployment of standard 8mm sensors. It serves as the vital RF impedance-matched link between the 3300 NSv proximity probe and the 3300 NSv Proximitor Sensor.

This model features a total physical length of 6.0 meters (19.7 feet), standard unarmored coaxial construction, and a patented miniature coaxial ClickLoc connector assembly. Reinforced with the 05 Multiple Approvals protocol, it complies with international intrinsic safety regulations for deployment in hazardous industrial processing locations. It ensures clean signal propagation for radial vibration, axial position, and high-frequency tachometer measurements without introducing electrical noise or impedance mismatches.

Technical Specifications

Model Configuration Explanation

The model identifier 330930-060-00-05 breaks down into factory-defined engineering parameters:

• 330930: Core platform series designation for the 3300 NSv Proximity Extension Cable.
• 060: Cable Length Option. Evaluates to exactly 6.0 meters of physical cable. This length is critical for reaching remote hazardous area field junction boxes from the machine casing.
• 00: Connector and Armor Option. Configured without structural stainless steel armor. Provides maximum routing flexibility within protective structural field conduits or enclosed terminal trunks.
• 05: Agency Approval Option. Multiple Approvals package. Combines ATEX, IECEx, and North American CSA certifications for globally harmonized intrinsic safety compliance.

Typical Applications

• Centrifugal Compressors: Monitoring internal small-diameter thrust collars and radial shaft profiles where tight spaces prohibit standard 8mm probe placement.
• Hydroelectric Turbines: Tracking shaft runout and phase-reference angles in tight packing glands or wet operational zones.
• Aeroderivative Gas Turbines: High-accuracy rotor dynamics and speed telemetry tracking inside compact, high-temperature casing envelopes.
• Industrial Gearboxes: Measuring high-speed input and output shaft vibrations next to gear teeth where spatial constraints are severe.

System Compatibility

The 330930-060-00-05 extension cable is a matched component within a tuned radio frequency (RF) tank circuit. It is not interchangeable with other Bently Nevada platform components.

• Proximity Probes: Connects exclusively to 3300 NSv Proximity Probes (such as the 330901 or 330902 series). It requires a 1.0-meter integrated probe cable to establish a calibrated 7.0-meter system loop, or a 0.5-meter probe for a 6.5-meter system loop.
• Proximitor Sensors: Must interface directly with a 3300 NSv Proximitor Sensor (Model 330980). Connecting this cable to a standard 3300 XL 5m/9m Proximitor will cause severe scale factor errors.
• Machinery Protection Racks: Routes conditioned voltage signals directly to the input channels of the Bently Nevada 3500/42M Proximitor Seismic Monitor module or structural 3701D Trendmaster platforms.

Critical Routing Guidelines

• Enclosed Conduit Protection: Because this model is unarmored (00 option), always route the cable inside dedicated, grounded metal conduits to shield the signal from external electromagnetic interference (EMI).
• Enforce Bend Radii Limits: Maintain a strict minimum bend radius of 25.4 mm (1.0 inch) during structural routing. Kinking changes the internal spacing of the coaxial layers, creating impedance shifts.
• Connector Insulation Isolation: Use standard connector silicone boots or clear heat-shrink tubing to fully insulate the ClickLoc union inside junction boxes. Do not let the metal connector body touch the grounded enclosure wall.
• Cable Tie Tensioning: Secure the FEP jacketed cable with nylon zip ties at regular intervals. Tighten ties snugly to prevent structural chafing, but avoid crushing or pinching the cable outer diameter.
• Distance Tracking: Never splice, cut, or shorten this extension cable. The 6.0-meter length is electrically tuned to the Proximitor oscillator; length changes will destroy measurement calibration.

Product Advantages

• Optimized for Tight Spaces: The unarmored FEP jacket profile allows for tight routing through internal bracket ports and small machine cavities.
• Audible ClickLoc Locking: Gold-plated brass terminations snap together firmly, preventing field disconnects caused by continuous industrial vibration.
• Stable Thermal Performance: Maintains constant characteristic capacitance and resistance from -51°C to +177°C, minimizing signal drift across wide ambient shifts.
• True Drop-In Interchangeability: Manufactured to exact tolerances so that individual field units can be swapped out without requiring total loop recalibration.

Ordering Information

Logistics and Shipping

Professional Packaging Protocol:

Every Bently Nevada 330930 extension cable is packed within an anti-static industrial packaging shield to fully isolate the internal dielectric layers from electrostatic discharge hazards. The cable coil is fixed flat to eliminate twisting or kinking forces, placed inside custom shock-absorption foam chambers, and shipped in a rugged corrugated structural exterior box to ensure safe international transit.

Frequently Asked Questions

• Can this 3300 NSv extension cable be paired with a standard 3300 XL 8mm proximity probe?

  No. The 3300 NSv series operates on distinct electrical parameters and tuning frequencies optimized for small-target applications. Interfacing this cable with an 8mm probe disrupts the calibrated system impedance, rendering the output data completely inaccurate.

• What happens if the physical length of this extension cable is altered in the field?

  Cutting or splicing the cable modifies its total nominal capacitance and characteristic impedance. This shifts the tuned RF circuit loop away from the Proximitor factory specification, corrupting the 200 mV/mil scale factor and causing major tracking errors on protection monitors.

• Does the lack of stainless steel armor on the 00 option affect signal quality?

  No, the electrical shielding remains high. The unarmored designation simply means it lacks an exterior physical metal mesh wrapper. The coaxial core contains a full shield layer. External metallic conduit routing is required to supply mechanical impact defense.

• How do you confirm the electrical health of a 330930 cable using a multimeter?

  Disconnect both ends. Measure the resistance of the center conductor from pin to socket; it should read near 0 Ω. Then measure resistance from the center pin to the outer shell; it must show an infinite open circuit, confirming no internal insulation failure.

• What is the purpose of the gold plating on the ClickLoc coaxial connectors?

  Gold plating prevents oxidation and surface corrosion in high-humidity or chemically active environments. It ensures low contact resistance across years of field service, preventing signal attenuation or thermal noise generation.

• Is a specialized tool needed to link or unlock the ClickLoc connector interfaces?

  No. ClickLoc connectors engage via a manual push-and-twist mechanism that locks into place with an audible snap. They are designed for quick field connection and removal without requiring specialty wrenches or crimping pliers.

• What specific hazard protection mechanisms are included in the "05" certification?

  The "05" multi-approval framework certifies the hardware for Intrinsic Safety (IS) and Non-Incendive installations when deployed through matching galvanic barriers or Proximitor isolators. It satisfies global ATEX, IECEx, and CSA requirements for Zone 0, 1, and 2 deployment.

• Why does the 3300 NSv system use a 95-ohm coaxial design rather than standard 50-ohm hardware?

  The 95 Ω characteristic impedance is specifically engineered by Bently Nevada to optimize the RF energy transmission envelope for the NSv probe tip profile, maximizing sensitivity over narrow target diameters and small linear gaps.