Bently Nevada 330730-080-00-05 Extension Cable – 3300 XL Series

Bently Nevada 330730-080-00-05: 8-Meter Coaxial Extension Cable for 3300 XL Proximity Probe Systems

The Bently Nevada 330730-080-00-05 is an 8.0-meter coaxial extension cable engineered as the signal-transmission backbone between an 8mm proximity probe and its associated proximitor/driver module. Within a machinery protection loop, this cable carries a high-frequency eddy-current signal at a nominal system sensitivity of −7.87 V/mm (−200 mV/mil). Any deviation in cable impedance, shielding continuity, or connector integrity directly corrupts the displacement measurement at the monitor input card — making the selection of a factory-matched, OEM-calibrated cable a non-negotiable engineering requirement for API 670-compliant installations.

The 330730-080-00-05 is factory-paired to the Bently Nevada 3300 XL 8mm Proximity Probe System, which includes the 330900/330905/330910 probe series and the 330180/330181 Proximitor Sensor. The combined probe-cable-proximitor system is calibrated as a matched set; substituting a cable of a different length or impedance tolerance without re-calibrating the proximitor will introduce a static offset error and compress or expand the linear measurement range.

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Technical Parameters

Hardware Logical Analysis

The 330730-080-00-05 operates within a passive eddy-current signal chain. The proximity probe generates an oscillating magnetic field at approximately 1 MHz; the target’s conductive surface induces eddy currents that load the probe’s LC tank circuit, modulating the oscillator amplitude. This amplitude-modulated signal travels through the extension cable to the proximitor, which demodulates it and outputs a DC voltage proportional to the gap distance.

Three hardware design factors govern signal integrity across the 8-meter run:

• Impedance continuity: The 50 Ω coaxial geometry is maintained from probe connector to proximitor input. Any impedance discontinuity — caused by a damaged connector, kinked cable, or moisture ingress — creates a reflection that superimposes on the gap signal, manifesting as a false vibration component at the monitor.
• EMC shielding architecture: The cable’s braided outer shield is terminated at both ends to chassis ground through the MIL-C-17 connector shells. This single-point or double-point grounding (depending on installation practice) attenuates common-mode interference from variable-frequency drives, high-current bus bars, and RF sources common in turbomachinery environments. The shield coverage factor exceeds 95%, providing effective attenuation of interference above 100 kHz.
• Dielectric stability: The PTFE or polyethylene dielectric used in the 3300 XL cable series maintains a stable dielectric constant across the operating temperature range (−35 °C to +85 °C), preventing thermally induced velocity-of-propagation shifts that would alter the effective electrical length of the cable and detune the proximitor’s internal compensation network.

The -05 suffix designates the standard (non-armored) jacket construction, appropriate for installations where the cable is routed through conduit or cable trays with mechanical protection. For direct-burial or high-abrasion routing, the -CN suffix armored variant is specified instead.

System Integration Benefits

• Factory-matched calibration traceability: The 330730-080-00-05 is calibrated as part of a complete probe/extension/proximitor set, ensuring the system’s linear range (typically 0.25 mm to 2.25 mm gap) and sensitivity are within ±0.5% of the nominal −7.87 V/mm specification without field adjustment.
• API 670 compliance out of the box: The complete 3300 XL system meets API 670 (5th Edition) requirements for radial vibration, axial position, and differential expansion monitoring on critical rotating machinery, eliminating the need for additional compliance engineering.
• Deterministic signal latency: The fixed electrical length of the 8-meter cable introduces a propagation delay of approximately 40 ns — negligible relative to the 1 MHz carrier frequency — ensuring that the proximitor’s demodulated output tracks shaft displacement in real time without phase distortion at vibration frequencies up to 20 kHz.
• Plug-and-play replacement: The MIL-C-17 connector interface is standardized across the 330730 series, allowing field replacement without re-termination or re-calibration, provided the replacement cable carries the same part number and suffix.
• Broad environmental tolerance: The −35 °C to +85 °C operating range covers the full ambient envelope of outdoor turbine enclosures, underground compressor vaults, and high-temperature process areas without derating.
• Diagnostic transparency: The 3500 Series monitor can perform cable continuity and shield integrity checks via its built-in transducer health diagnostics, providing early warning of cable degradation before measurement accuracy is compromised.
• Hazardous area system compatibility: When the complete probe/extension/proximitor set carries ATEX/IECEx or NEC Class I Division 1 certification, the 330730-080-00-05 participates in the certified system boundary, maintaining the intrinsic safety or explosion-proof classification of the installation.
• Long-term OEM parts availability: Bently Nevada (Baker Hughes) maintains an active installed-base support program for the 3300 XL series, ensuring continued availability of matched replacement cables for the operational life of the machinery protection system.

Quality Assurance & Global Logistics

Every Bently Nevada 330730-080-00-05 unit supplied through siemensplc.com is sourced from verified industrial automation supply channels with full OEM traceability. Prior to dispatch, each cable undergoes visual inspection of the connector shells, jacket integrity, and labeling authenticity. Original OEM packaging, certificate of conformance, and datasheet are available upon request.

Shipments originate from our warehouse in Xiamen, China, a major logistics hub with direct access to international freight carriers including DHL Express, FedEx International Priority, and UPS Worldwide Expedited. In-stock units are dispatched within 1–3 business days. For project-volume orders or expedited requirements, contact our team directly to confirm lead time and freight options. We serve customers across Southeast Asia, the Middle East, Europe, and the Americas, with export documentation (commercial invoice, packing list, certificate of origin) prepared to meet customs requirements in the destination country.

A 12-month warranty covers manufacturing defects under normal operating conditions. Warranty claims are processed with replacement or credit, subject to inspection of the returned unit. We supply only genuine OEM parts — no misrepresented substitutes or unlabeled third-party alternatives.

Contact Information

📧 Email: [email protected]
📱 WhatsApp: +86 18359268345
🌐 Web: siemensplc.com
📍 Location: Xiamen, China
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