The Bently Nevada 330930-045-00-CN, also cataloged as the 3300 NSv Extension Cable, operates as a dedicated hardware component for high-frequency signal transmission between proximity probes and Proximitor sensors within 3300 NSv Proximity Transducer System networks.
Suffix Breakdown & Model Matrix
The catalog options for the 330930-045-00-CN breakdown as follows:
- 330930: Base Model for 3300 NSv Extension Cable
- 045: Cable Length Option - 4.5 meters (14.8 feet)
- 00: Connector and Cable Option - Without stainless steel armor
- CN: Agency Approval Option - Country-specific approval (China)
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 330930-045-00-CN |
| Brand | Bently Nevada |
| Origin | USA |
| Weight | 1.5 kg (Shipping weight) |
| Dimensions | 4.5 meters (14.8 feet) length |
| Operating Temp | -51 to 177 deg C (-60 to 350 deg F) |
| Power Consumption | Passive physical conductor (zero power dissipation) |
| Cable Material | 75 ohm coaxial, fluoroethylene propylene (FEP) insulated |
| Center Conductor Resistance | 0.220 ohm/m (0.067 ohm/ft) |
| Shield Resistance | 0.066 ohm/m (0.020 ohm/ft) |
| Extension Cable Capacitance | 69.9 pF/m (21.3 pF/ft) typical |
| Armor Option | Option 00 (Without stainless steel armor) |
| Agency Approval | Option CN (China specific approval) |
Eddy-Current Probe Scaling & Gap Voltage Validation
The 3300 NSv extension cable transfers high-frequency excitation signals between the eddy-current probe and the Proximitor sensor while maintaining strict resistance and capacitance matching (69.9 pF/m typical). Maintaining correct physical cable length is required to preserve linear eddy-current probe scaling across tight side-clearance target zones. During commissioning, gap voltage validation requires setting the static mechanical probe position until a baseline target of -10 VDC is observed across the Proximitor output terminals, establishing linear voltage response for dynamic shaft measurements.
Frequently Asked Questions
Q: How does the electrical capacitance of the extension cable affect system performance?
A: The 3300 NSv Proximitor sensor is calibrated to the total capacitance of a specific loop length. Using an unapproved cable length alters circuit capacitance (69.9 pF/m nominal) and shifts probe sensitivity scaling.
Q: What insulation material is used on the 330930 extension cable?
A: The coaxial cable uses fluoroethylene propylene (FEP) insulation, which rates for continuous thermal stability across an operating range of -51 to 177 deg C.
Field Installation Guidelines
- Cable Routing: Lay the unarmored FEP coaxial cable through protective electrical conduit or dedicated instrument trays to isolate it from heavy mechanical abrasion.
- Separation Distance: Maintain strict physical separation from high-voltage AC power wiring and variable frequency drive output cables to prevent electromagnetic noise induction.
- Connector Alignment: Clean miniature coaxial connectors prior to mating. Push and twist ClickLoc fittings until fully latched without applying excessive axial tension.
- Shield Ground Continuity: Maintain total shield coverage along the run, ensuring single-point panel termination to prevent ground loop currents across the 4.5-meter span.
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