330877-080-36-CN Bently Nevada 3300 XL 50 mm Extension Cable

Product Overview

The 330877-080-36-CN (330877-080-36-CN) is a high-performance 3300 XL 50 mm extension cable manufactured by Bently Nevada, specifically engineered for critical machinery protection and proximity sensor systems. As a vital component of the 3300 XL 50 mm Proximitor sensor system, this cable maintains signal integrity between the probe and the Proximitor sensor in large-scale rotating equipment. Featuring the specialized FluidLoc technology and PFA insulation, the 330877-080-36-CN is designed to prevent hazardous fluids from wicking through the cable, making it an essential solution for oil-filled environments such as turbines, compressors, and large industrial pumps in the oil and gas or power generation sectors.

Technical Configuration

The 330877-080-36-CN utilizes a 75 ohm triaxial architecture, insulated with perfluoroalkoxyethylene (PFA) to ensure extreme temperature resilience and chemical resistance. This specific configuration features a cable length of 8.0 meters (26.2 feet) and utilizes the "36" FluidLoc option, which provides an additional layer of protection against fluid migration—a common cause of sensor failure in pressurized machinery. The "CN" agency approval indicates country-specific compliance, ensuring the hardware meets rigorous safety and technical standards for localized industrial deployments. With a typical capacitance of 69.9 pF/m, the cable is tuned to maintain the precise electrical characteristics required for accurate vibration and position measurements.

Technical Specifications

Technical FAQs

What is the primary benefit of the FluidLoc (Option 36) cable?

The FluidLoc extension cable is specifically designed with a proprietary internal seal that prevents oil, moisture, or other process fluids from leaking through the inside of the cable. This protects the Proximitor sensor electronics from contamination if a probe seal fails in an oil-filled machine housing.

Is the 330877-080-36-CN compatible with standard 3300 XL 8 mm probes?

No. This extension cable is specifically designed for the 3300 XL 50 mm system. The electrical characteristics (capacitance and impedance) of 50 mm cables differ from 8 mm or 11 mm systems. Using mismatched cables will result in significant calibration errors and inaccurate machinery vibration data.

Can this cable withstand extreme high-temperature environments?

Yes. Thanks to the PFA (perfluoroalkoxyethylene) insulation, the cable is rated for continuous operation in temperatures ranging from -51 Celsius to +200 Celsius, making it suitable for mounting inside hot turbine enclosures or near steam lines.

Engineering & Installation Guide

• Connector Protection: During installation, ensure the miniature coaxial connectors remain clean and dry. Use a silicone lubricant only on the connector threads if required by the manual, but never on the signal-carrying pins. It is highly recommended to use connector protectors or heat-shrink tubing to seal the connection point between the probe and the extension cable.

• Minimum Bend Radius: To avoid damaging the triaxial shielding and the FluidLoc seal, observe the minimum bend radius during routing. Avoid sharp 90-degree bends; instead, use sweeping curves to maintain the 75 ohm impedance and prevent signal attenuation.

• Routing and Interference: Route the 330877-080-36-CN through grounded metal conduit wherever possible. Avoid running the extension cable parallel to high-voltage AC motor leads or VFD cables, as electromagnetic interference (EMI) can introduce noise into the low-voltage proximity signal.