Bently Nevada 330877-080-37-00 3300 XL 50 mm Extension Cable

Description

The 330877-080-37-00 is an 8.0-meter 3300 XL 50 mm extension cable configuration designed with flexible stainless steel armor and no hazardous area approvals. This industrial cable serves as a critical connection bridge within the 3300 XL 50 mm Proximity Transducer System, linking a 330876 50 mm probe to a 330878 Proximitor sensor. Constructed with a 75-ohm triaxial design and perfluoroalkoxyethylene (PFA) insulation, the cable integrates proprietary FluidLoc technology to prevent oil, water, and other process fluids from migrating through the cable interior.

Compared to unarmored variants, this armored cable offers high-level physical protection in exposed routing pathways where mechanical wear or abrasion is likely. The 8.0-meter length is specifically calibrated to pair with a 1.0-meter proximity probe to achieve a 9.0-meter total system length, allowing accurate differential expansion (DE) or rotor expansion (RX) measurements on oversized shafts and turbines over a broad 27.9 mm (1100 mils) linear range.

Features

• Option 080 specifies an 8.0-meter (26.2 feet) cable length, ideal for completing a calibrated 9.0-meter proximity transducer loop.
• Option 37 incorporates flexible stainless steel armor covered by a protective PFA jacket for high mechanical and fluid resistance.
• FluidLoc internal construction prevents moisture and turbine lubricants from traveling through the cable.
• Gold-plated brass and gold-plated beryllium copper miniature ClickLoc connectors ensure optimal electrical signal transmission.
• Tough PFA insulation supports continuous operation in harsh steam turbine conditions up to 200 degC.
• Option 00 designates a standard non-approved electrical configuration suitable for general industrial locations.

Applications

This cable is optimized for heavy-industry machinery protection and shaft monitoring systems. Typical installation areas include:

• Utility steam turbine generators in power plants.
• Oversized industrial gas turbines.
• Differential expansion (DE) and rotor axial position monitoring setups.
• Pulp and paper, mining, and petrochemical rotating machinery.

Ordering Information

Technical Specifications

Connections and Interfaces

Installation Guidelines

Adhere to the following engineering guidelines to maintain system calibration and avoid measurement errors:

• Always combine this 8.0-meter extension cable with a 1.0-meter probe to meet the exact 9.0-meter matching length of the Proximitor sensor.
• Inspect all coaxial connections to ensure they are clean, dry, and free of oil before mating. Do not use tools to over-tighten ClickLoc connectors beyond 0.565 Nm (5 in-lb).
• Do not bend the armored cable beyond its minimum bend limit of 25.4 mm (1.0 in) during routing.
• Protect intermediate field connections from ambient contaminants using high-temperature silicone self-fusing tape, keeping the tape outside the machine casing.