Product Overview

• Brand: Bently Nevada (a GE Measurement & Control brand)
• Model: 330876-03-50-00-00
• Series: 3300 XL
• Type: Proximity Probe Extension Cable Assembly
• Industry: Oil & gas, power generation, petrochemicals, industrial manufacturing.
• Function: Extends the connection between Bently Nevada 3300 XL proximity probes and their signal conditioners (proximitors). Transmits low-level eddy-current signals (for shaft vibration, position, or speed measurements) with minimal interference, ensuring accurate data for machinery condition monitoring and predictive maintenance.

Model Configuration Breakdown

1. Base Model (330876): Identifies the cable as a 3300 XL series proximity probe extension cable.
2. Cable Length (03): Indicates a 3-meter (9.84-foot) length (common length code for Bently’s 3300 XL cables).
3. Connector Type (50): Specifies a miniature coaxial “click-loc” connector (compatible with 3300 XL probes and proximitors, ensuring secure, tool-free mating).
4. Jacket Material (00): Standard FEP (Fluorinated Ethylene Propylene) jacket (default for general industrial use).
5. Special Approvals (00): No special hazardous area or agency approvals (e.g., ATEX, IECEx) — standard industrial grade.

Key Specifications

1. Electrical & Signal Parameters
   • Cable Type: Shielded coaxial cable, optimized for eddy-current proximity probe signals.
   • Impedance: 50 ohms (matches 3300 XL probe and proximitor impedance to maintain signal integrity and minimize reflection).
   • Signal Compatibility: Designed exclusively for Bently Nevada 3300 XL 8 mm proximity probe systems (e.g., probes 330103-XXX, 330104-XXX).
   • Capacitance: ~110 pF/m (low capacitance to reduce signal attenuation over the 3-meter length).
2. Physical & Mechanical Attributes
   • Length: 3 meters (9.84 feet) — fixed length per the “03” code in the part number.
   • Conductors:
     • Center conductor: Stranded copper (24 AWG) for flexibility during installation in tight machinery enclosures.
     • Shielding: Dual shielding (foil + braided copper, ≥90% coverage) to block electromagnetic interference (EMI) and radio frequency interference (RFI).
   • Jacket Material: FEP (Fluorinated Ethylene Propylene) — chemically resistant, lightweight, and flexible.
   • Connectors:
     • Probe-end: Miniature click-loc coaxial connector (mates with 3300 XL probe’s male connector).
     • Proximitor-end: Matching miniature click-loc connector (compatible with 3300 XL proximitors, e.g., 330180-XXX).
3. Environmental Ratings
   • Operating Temperature: -34°C to +177°C (-30°F to +350°F) — suitable for high-heat environments (e.g., turbine enclosures) and cold outdoor installations.
   • Ingress Protection (IP): IP65-rated when mated with sealed connectors (dust-tight and protected against water jets).
   • Chemical Resistance: Resistant to industrial oils, fuels, hydraulic fluids, and most solvents (critical for petrochemical and offshore applications).
   • Vibration/Shock Resistance: Compliant with IEC 60068-2-6 (vibration) and IEC 60068-2-27 (shock) — durable for rotating machinery environments.

Applications

• Rotating Machinery Condition Monitoring:
  • Connects 3300 XL proximity probes to proximitors in gas/steam turbines, hydro turbines (power generation), and compressors (oil & gas).
  • Transmits shaft vibration (radial/axial), rotor position, and speed data for early fault detection (e.g., unbalance, misalignment, bearing wear).
• Industrial Asset Protection:
  • Integrates with Bently Nevada 3300 XL monitoring systems (e.g., 3300/35, 3500 Frame) to trigger alarms or emergency shutdowns if machinery conditions exceed safe thresholds.

Availability and Support

• Condition: Available as new OEM (through GE Bently Nevada) or genuine refurbished (via authorized distributors like AES Industrial, Hitech Control Systems).
• Warranty: 12-month warranty for new units (covers defects in materials/workmanship); refurbished units typically include a 6-month warranty.
• Documentation:
  • Datasheets and installation guides are accessible to GE Bently Nevada customers via their customer portal.
  • Third-party distributors may provide compatibility notes for pairing with specific 3300 XL probes/proximitors.

Compatibility and Similar Products

• Compatible Systems:
  • Bently Nevada 3300 XL 8 mm Proximity Probes (e.g., 330103-00-04-10-02-00, 330104-XXX).
  • Bently Nevada 3300 XL Proximitors (e.g., 330180-50-00, 330185-XXX).
  • Bently Nevada Monitoring Frames (e.g., 3300/35, 3500 System).
• Similar Bently Nevada Models:
  • 330876-05-50-00-00: 5-meter length variant of the same 3300 XL extension cable.
  • 330876-03-60-00-00: 3-meter cable with a different connector type (e.g., threaded instead of click-loc).

Installation and Maintenance Notes

1. Setup Requirements:
   • Ensure the cable length (3 meters) matches the system’s signal loss limits — longer cables may require signal boosters for 3300 XL systems.
   • Ground the cable shield only at the proximitor end (not the probe end) to avoid ground loops, which can distort signals.
2. Safety Guidelines:
   • Follow lockout-tagout (LOTO) procedures when installing near rotating machinery (e.g., turbines, motors).
   • Avoid bending the cable beyond its minimum bend radius (15 mm for FEP jacket) to prevent conductor or shield damage.
3. Troubleshooting:
   • If signal quality degrades, inspect connectors for corrosion or loose mating (common in humid or chemical-exposed environments).
   • Use a capacitance meter to verify the cable’s capacitance (should remain ~110 pF/m) — abnormal values indicate internal damage.

Critical Notes

1. Model Exclusivity: This cable is designed only for 3300 XL 8 mm systems. Do not use with older Bently series (e.g., 3300 Non-XL) or non-Bently probes, as impedance mismatches will cause signal loss.
2. Genuine Parts Recommendation: For critical applications (e.g., turbine control), use genuine Bently Nevada cables. Aftermarket cables may not meet EMI/RFI shielding or temperature resistance standards.
3. Length Confirmation: The “03” code denotes 3 meters, but always cross-verify with the supplier — some distributors may list alternative length codes for custom orders.