Description
Product Overview
The 1044500780C is a high-quality extension cable designed for Bently Nevada 3300 XL 8mm eddy current probe vibration monitoring system. It serves as the signal transmission link between the proximity probe and the 3300 XL transducer preamplifier, delivering real-time shaft vibration, position and thrust measurement signals. The suffix “C” denotes cable revision C. It adopts double-shielded, low-capacitance construction, minimizing signal attenuation and electromagnetic interference. Widely used in steam turbines, gas turbines, compressors, pumps and other rotating machinery in power plants, oil & gas, refinery and petrochemical plants, paired with 330103 /330104 series probes and 330180 preamplifiers for Bently Nevada 3500 rack online vibration monitoring.
Technical Specifications
| Item | Parameter |
|---|---|
| Part Number | 1044500780C |
| Manufacturer | Bently Nevada (GE Vernova) |
| Series | 3300 XL 8mm Eddy Current Vibration Monitoring System |
| Product Type | Probe Extension Cable |
| Cable Construction | Double shielded, low capacitance coaxial cable |
| Capacitance | Matched for 3300XL 8mm probe system |
| Connector Type | BNC / 4-pin mini DIN (compatible with 3300XL preamp) |
| Insulation Material | FEP fluoropolymer insulation |
| Outer Jacket | Flame retardant, chemical resistant thermoplastic jacket |
| Cable Length | Custom factory calibrated length (fixed length variant for 1044500780C) |
| Frequency Response | 0 ~ 10 kHz |
| Signal Accuracy | Maintains system calibration for vibration and axial position measurement |
| Operating Temp | -50°C ~ +125°C |
| Storage Temp | -55°C ~ +140°C |
| Humidity | 5–95% non-condensing |
| Certification | CE, meets API 670 machinery protection standard |
| Compatible Monitor Rack | Bently Nevada 3500/40, 3500/42M, 3500/45 |
| Hot Swap | Not applicable (fixed field wiring cable assembly) |
Key Features
- Precision low-capacitance coaxial extension cable, factory calibrated to match 3300XL 8mm proximity probe, ensures the eddy current system maintains original linearity and measurement accuracy.
- Double shielded design, effectively suppresses EMI interference from high-current motor and power wiring, critical for low-level vibration signal transmission.
- FEP insulation and robust outer jacket, excellent resistance to high temperature, oil, moisture and chemical vapors inside turbine enclosures.
- Pre-terminated factory connectors, eliminates field soldering error and capacitance mismatch risk.
- Revision C upgraded mechanical construction, improved resistance to vibration fatigue and cable flexing in rotating machinery cabinets.
- Fully compliant with API 670 machinery protection specification, suitable for safety-critical turbomachinery protection loops.
- Matches with 330103 / 330104 probes and 330180 preamplifiers, feeds signal to Bently Nevada 3500 series monitoring rack.
- Used as spare replacement part for routine maintenance of existing Bently Nevada vibration monitoring installations.
Installation Notes
- Route 1044500780C extension cable separately from high voltage power cables and motor wiring to reduce electromagnetic noise coupling.
- Avoid sharp bends, crushing, pulling or abrasion damage; minimum bend radius must follow Bently Nevada specifications.
- Confirm connector pin assignment before connection; keep connectors clean and protected from oil, dust and moisture.
- Follow lockout/tagout procedures before disconnecting vibration probe cable on running turbomachinery.
- After cable replacement, perform system gap calibration and linearity check for the eddy current probe assembly.
- Do not splice or cut the extension cable; cutting will alter capacitance and invalidate factory calibration.
- Keep cable connectors properly sealed to prevent contamination in high humidity or oily cabinet environments.
Testing Procedure
- Visual inspection: Check cable jacket for cracks, cuts, oil degradation; inspect connector pins for corrosion, bent pins or loose crimp.
- Continuity and insulation resistance test on cable conductors and shields, verify no short circuit between core and shield.
- Measure cable capacitance and confirm it matches factory specification for 3300XL 8mm system.
- Assemble full probe + 1044500780C cable + preamplifier set, perform gap calibration test using target metal shim.
- Verify vibration signal output and linearity across probe working range, confirm readings on 3500 monitoring module.
- Check noise floor of signal to confirm shielding integrity after installation.
- Record continuity, capacitance and calibration test data and tag spare cable for inventory.
FAQ
Q: What is Bently Nevada 1044500780C used for? A: It is a factory-calibrated extension coaxial cable for 3300XL 8mm eddy current proximity probe, transmitting shaft vibration and axial position signals from probe to preamplifier for turbomachinery protection.
Q: What system is 1044500780C compatible with? A: Bently Nevada 3300 XL 8mm probe system, working with 330103/330104 probes, 330180 preamps and 3500 series vibration monitor rack.
Q: Can I cut or shorten this extension cable on site? A: No. The cable capacitance is factory calibrated. Cutting or splicing will change capacitance and break the system linearity calibration.
Q: What standard does this cable comply with? A: API 670 Machinery Protection Standard for critical rotating equipment.
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