Product Overview

This extension cable assembly directly connects Bently Nevada proximity probes to 3300/3500 monitoring racks. The 330930-065-00-00 model delivers low-loss coaxial transmission for vibration, position, and axial displacement signals. You deploy it to route signals safely through machinery frames, junction boxes, or conduit without degrading sensitivity or phase fidelity. The construction withstands continuous operation in high-vibration zones and thermal cycling environments typical of steam and gas turbines. Shielded routing prevents EMI pickup from motor drives and power distribution. Factory-terminated ends guarantee precise impedance matching and consistent gap voltage calibration. Engineers specify this assembly to reduce signal path losses, eliminate field splices, and accelerate commissioning cycles across critical rotating equipment.

Suffix Logic & Core Technology

The 330930-065-00-00 part number encodes physical and electrical attributes for rapid identification. The leading segment 330930 designates the Bently Nevada 3300 NSv series cable family. The 065 suffix indicates an extended jacketed coaxial run optimized for longer routing spans within standard plant conduit limits. The 00-00 sequence specifies standard high-density polyethylene insulation and unarmored jacket configuration for typical turbine hall installations. This assembly preserves the 1 kHz to 10 kHz bandwidth required for eddy current probe operation and maintains a nominal 50 ohm characteristic impedance. Terminated connectors feature locking collars that match the probe and transducer receptacles. The internal center conductor uses a stranded copper alloy for fatigue resistance while the outer braid provides 95% minimum RF shielding coverage.

Technical Specifications

Installation Practices

Route the cable away from high-current power lines to maintain signal purity. Maintain a minimum 150 mm separation from AC motor leads and VFD output cables. Verify connector alignment before tightening the locking collar to avoid cross-threading. Route the assembly through flexible conduit or cable trays with a continuous bend radius no smaller than 38 mm. Ground the shield at the monitor chassis side only to prevent ground loops. Perform insulation resistance checks above 100 MΩ at 250 VDC before energizing the transducer. Calibrate gap voltage at 180 mV/mil after installation to confirm linear operating range. Torque connector rings to 0.6 N·m using a calibrated spanner. Label both ends clearly with asset tags and loop identifiers. Document cable routing paths in the plant wiring schematics for future audits.

System Integration & Environmental Resilience

The cable withstands continuous vibration levels exceeding 5 g and thermal shock cycles from -20°C to +70°C without signal drift. Shielding effectiveness remains stable in high-humidity turbine basements and near steam piping. You integrate this assembly directly into existing TSI architectures without requiring signal conditioning changes. The extension preserves phase relationships critical for multi-channel orbit plots and shaft vector analysis. Bently Nevada 3300/3500 monitors read the probe signal without attenuation adjustments. The assembly complies with industrial EMC requirements and survives exposure to hydrocarbon vapors and cleaning solvents. Field engineers report stable trend data during hot startups and load swings. The design eliminates splice points that typically introduce capacitance errors and noise pickup. You achieve faster fault diagnosis and reduced false trips across large-scale turbine trains.

Ordering Info

(1) One factory-sealed 330930-065-00-00 extension cable assembly in anti-static polyethylene bag. (2) Printed calibration certificate and traceability documentation with serial batch codes. (3) Installation hardware including cable ties, connector backshells, and torque wrench adapter. (4) Optional junction box adapter kit available for multi-probe daisy-chain routing (ordered separately).

Shipping Details

We dispatch orders within 2 to 7 business days after payment clears. DHL, FedEx, or UPS handles global express transit with real-time tracking. Every unit ships in ESD-safe packaging layered inside a rigid cardboard crate. The crate includes moisture barrier liners and vibration-dampening foam inserts. Custom crating for oversized bulk orders arrives ready for forklift unloading. Import documentation, commercial invoices, and packing lists travel in the outer pouch for rapid customs clearance.

Technical Inquiries

Q1: Does the 330930-065-00-00 change the calibration constant of the original probe? A1: No. The extension preserves the 200 mV/mil sensitivity and linear gap range. You verify gap voltage at the monitor input to confirm nominal 10 VDC supply performance.

Q2: Can I route this cable alongside power supply conductors in the same tray? A2: No. Maintain at least 150 mm physical separation and cross power cables at 90-degree angles only. The shield prevents most EMI, but proximity to high-current lines risks low-frequency noise injection.

Q3: Is this cable compatible with older 3300 non-XL transducers? A3: Yes. The locking collar and pinout match standard 3300 series connectors. You must confirm transducer firmware revision supports the extended cable capacitance, though most racks compensate automatically.

Q4: How do I terminate the cable if I need a field splice? A4: Factory guidelines prohibit field splices. Use the full-length extension cable from end to end. If you must modify routing, install a Bently-approved junction module with matched impedance to avoid signal reflection.