Bently Nevada 330103-05-10-10-02-05 Extension Cable – 3300 XL

Bently Nevada 330103-05-10-10-02-05 — 5-Meter Coaxial Extension Cable for 3300 XL Eddy-Current Proximity Systems

The 330103-05-10-10-02-05 is a precision-matched coaxial extension cable manufactured by Bently Nevada (Baker Hughes) for exclusive use within the 3300 XL proximity transducer system. Its function is singular and non-negotiable: to carry the high-frequency oscillating RF signal generated at the probe tip across a 5.0-meter run to the proximitor/driver module, while preserving the electrical characteristics upon which the entire gap-voltage measurement chain depends. In rotating machinery protection, signal fidelity at this cable is not a performance variable — it is a system integrity requirement.

The part number suffix -05-10-10-02-05 encodes the cable’s configuration: 5-foot probe, 10-32 coaxial connectors at both terminations, armored jacket, and 5-meter extension length. This encoding is critical for procurement engineers who must match the extension cable to the probe and proximitor already installed in the field. Substituting an incorrect suffix variant will shift the system’s calibrated gap-voltage curve and introduce measurement error that no software compensation can fully correct.

Real-time Stock & RFQ: [email protected] | WhatsApp: +86 18359268345

Technical Parameters

Hardware Logical Analysis

The 3300 XL proximity system operates on the eddy-current transduction principle. The proximitor module drives the probe coil at a carrier frequency of approximately 1.0 MHz via the extension cable. As the conductive shaft surface approaches the probe tip, eddy currents induced in the shaft load the probe coil, reducing its oscillation amplitude. The proximitor demodulates this amplitude-modulated signal and outputs a DC voltage linearly proportional to the gap distance — typically spanning –2 VDC to –18 VDC across a 25–1,000 mil measurement range.

The 330103-05-10-10-02-05 extension cable must maintain a tightly controlled characteristic impedance of 50 Ω along its entire 5-meter length. Any impedance discontinuity — caused by mechanical damage, connector corrosion, or an incorrect substitute cable — creates a standing wave reflection that distorts the carrier signal envelope. The result is a non-linear gap-voltage output that appears as a calibration drift to the monitoring system, potentially masking real shaft displacement events or generating spurious alarms.

The PTFE dielectric core provides three simultaneous engineering benefits: a stable dielectric constant (ε ≈ 2.1) across the full operating temperature range, chemical inertness against hydrocarbon lubricants and cleaning solvents, and a low dissipation factor that minimizes signal attenuation over the 5-meter run. The stainless steel armored braid serves as both the RF shield and the mechanical protection layer. Its coverage density exceeds 90%, providing effective attenuation of external electromagnetic interference (EMI) from variable-frequency drives, high-current bus bars, and adjacent instrumentation cables — all common sources of noise in turbomachinery environments.

The 10-32 UNF coaxial connectors at both terminations are machined from stainless steel to maintain dimensional stability under thermal cycling. The connector geometry is designed to preserve the 50 Ω impedance transition at the mating interface, preventing the localized impedance step that would occur with a standard BNC or SMA adapter. Connector torque specification is 0.9 N·m (8 in-lb) per Bently Nevada installation manual TDI-330103; under-torquing introduces intermittent contact resistance, while over-torquing risks deforming the PTFE dielectric at the connector throat.

System Integration Benefits

• Zero-Recalibration Replacement: The 330103-05-10-10-02-05 is dimensionally and electrically identical to the OEM-installed assembly. Swapping a failed cable with this part number requires no proximitor re-tuning, no gap voltage re-verification, and no system re-commissioning — provided total system cable length remains unchanged.
• API 670 Compliance Maintained: The cable’s electrical characteristics satisfy the requirements of API Standard 670 (Machinery Protection Systems), ensuring that the complete transducer chain remains compliant with refinery and petrochemical plant instrumentation standards after replacement.
• Deterministic Signal Latency: The fixed propagation velocity of the coaxial cable (approximately 0.66c in PTFE dielectric) ensures that signal transit time across the 5-meter run is constant and predictable, supporting the 3300 XL system’s ability to resolve shaft vibration events at frequencies up to 10 kHz without phase distortion.
• EMI Immunity in Dense Electrical Environments: The armored braid shield, bonded at both connector shells, provides a continuous Faraday enclosure. This is particularly significant in motor control rooms and compressor trains where VFD switching transients can reach 10 kV/μs — levels that would corrupt unshielded instrumentation signals.
• Thermal Stability Across Process Conditions: The –40 °C to +125 °C operating envelope covers the full range from cold-start conditions in arctic installations to steady-state bearing housing temperatures in high-speed centrifugal compressors, without requiring derating or additional thermal insulation.
• Mechanical Durability in Congested Cable Trays: The stainless steel armored jacket resists abrasion from adjacent cables, mechanical impact during maintenance activities, and rodent damage — failure modes that account for a significant proportion of field cable replacements in long-running plant assets.
• Diagnostic Transparency: A correctly installed 330103-05-10-10-02-05 cable contributes no measurable noise floor to the vibration signal. This preserves the monitoring system’s ability to detect sub-mil shaft displacement changes, supporting early-warning diagnostics for bearing wear, rotor unbalance, and misalignment before they reach alarm thresholds.
• Spare Parts Standardization: The 330103 series extension cable is the single most common consumable spare in a 3300 XL-equipped machinery train. Stocking one unit per monitored machine eliminates the primary single-point-of-failure that causes unplanned machinery trips due to cable degradation — a maintenance strategy consistent with API 670 Section 12 spare parts recommendations.

Quality Assurance & Global Logistics

Every 330103-05-10-10-02-05 unit supplied through siemensplc.com is sourced as genuine Bently Nevada (Baker Hughes) OEM hardware. Prior to dispatch from our Xiamen, China facility, each cable undergoes a three-point inspection protocol: (1) connector continuity and contact resistance measurement at both terminations, (2) shield integrity verification using a time-domain reflectometer (TDR) to confirm impedance uniformity along the cable length, and (3) jacket condition inspection for armoring integrity and PTFE dielectric exposure.

Units are packaged in anti-static polyethylene bags, coiled to a diameter no less than 200 mm (8× the minimum bend radius) to prevent dielectric deformation during transit, and placed in foam-lined export cartons rated for international air and sea freight. Each shipment is accompanied by a packing list, commercial invoice, and — upon request — a third-party inspection certificate or original manufacturer documentation for customs and plant records.

From Xiamen, we dispatch via DHL Express, FedEx International Priority, and UPS Worldwide Expedited. Standard in-stock orders ship within 1–2 business days. Delivery to major industrial hubs in Southeast Asia, the Middle East, Europe, and North America typically completes within 3–7 business days from dispatch. Expedited same-day dispatch is available for orders confirmed before 14:00 CST. All shipments are fully tracked and insured. Export documentation for controlled goods is prepared in compliance with Chinese customs regulations and destination country import requirements.

Contact Information

Email: [email protected]
WhatsApp: +86 18359268345
Web: siemensplc.com
Location: Xiamen, China
© 2026 siemensplc.com. All rights reserved.