Bently Nevada 330730-040-01-CN 3300 XL 11 mm Extension Cable

Description

For critical vibration and position monitoring in high-stress turbomachinery, the Bently Nevada 330730-040-01-CN extension cable establishes a reliable, low-loss signal path between 3300 XL 11 mm proximity probes and their corresponding Proximitor sensors. This heavy-duty cable is engineered to minimize transmission impedance and signal attenuation in harsh environments, ensuring precise eddy current displacement measurements. Protected by an integrated flexible stainless steel armor and a chemical-resistant outer jacket, it preserves measurement integrity even in environments saturated with synthetic lubricants and industrial fluids.

Features

• Rugged Protective Armor: Constructed with flexible AISI 302 stainless steel (SST) armor for excellent mechanical crush protection.
• Chemical-Resistant Jacket: Features an outer Fluorinated Ethylene Propylene (FEP) jacket to prevent fluid ingress and resist degradation from corrosive hydrocarbons.
• Gold-Plated Click-Loc Connectors: High-reliability coaxial connectors prevent connection degradation and provide a secure, vibration-proof connection.
• Controlled Electrical Parameters: Strictly calibrated capacitance characteristics ensure exact match with the 11 mm transducer system specifications.

Applications

• Steam and gas turbine shaft vibration and axial position monitoring.
• Heavy industrial compressor and expander bearing casing instrumentation.
• Hydroelectric generator shaft alignment and radial vibration monitoring.
• Critical pumps and cooling tower fan machinery protection systems.

Ordering Information

Technical Specifications

Empirical Engineering Insights

Alternative Models & Compatibility

The 3300 XL 11 mm extension cable is explicitly designed to match the electrical characteristics of 11 mm systems (which typically feature a scale factor of 3.94 V/mm). It is not interchangeable with standard 3300 XL 5 mm or 8 mm proximity systems due to substantial differences in coil inductance, cable capacitance, and calibration requirements. Mixing cables of different series or diameters will cause severe measurement drift and incorrect system scaling in your machinery protection monitor.

Application Pitfalls & Engineering Notes

To prevent electrical ground loops, the outer FEP jacket must remain intact across the entire run of the cable. The FEP layer acts as an insulator, preventing the stainless steel armor from establishing a parallel ground path against structural cable trays. Ensure that during pull-through operations, the bend radius does not drop below the minimum structural threshold to prevent micro-fracturing of the internal coaxial dielectric, which can cause intermittent calibration offsets in the Proximitor loop.

Commissioning & Wiring Tips

Before mating the gold-plated Click-Loc connectors, inspect them for dust, moisture, or oil residue. Use a lint-free cotton swab and electronic-grade isopropyl alcohol if cleaning is required. When installing inside turbine housings or areas exposed to splashing oil, protect the mated connection with a silicone self-fusing connector tape seal (such as Bently Nevada part number 40124-02) or connector protector boots rather than standard electrical tape to ensure long-term signal isolation.

Installation Guidelines