Overview
Configured for eddy-current signal transmission in the 3300 XL proximity monitoring system, the Bently Nevada 330730-040-00-CN (330730 3300 XL 11 mm Extension Cable) provides direct physical signal connection between proximity probes and system interface components.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 330730-040-00-CN |
| Brand | Bently Nevada |
| Product Type | 3300 XL 11 mm Extension Cable |
| Origin | USA |
| Weight | 0.14 kg |
| Dimensions | 20.5 x 22.4 x 3.3 cm shipping size |
| Operating Temp | Not specified |
| Power Consumption | Passive cable component, no external power consumption |
| Total Length | 4.0 meters (13.1 feet) |
| Cable Type | 75 Ohm triaxial cable |
| Cable Insulation Material | Fluoroethylenepropylene (FEP) insulated |
| Cable Weight | 45 g/m (0.5 oz/ft) |
| Agency Approval Option | 00 Standard cable |
| Series Compatibility | 3300 XL 11 mm Proximity Measurement System |
| Signal Function | Transmits proximity probe eddy-current measurement signals |
Eddy-Current Signal Transmission and Rotor Dynamics Interface
The 330730-040-00-CN extension cable maintains the electrical characteristics required by the 3300 XL 11 mm proximity probe system. It uses a 75 Ohm triaxial construction to transfer probe signals with controlled impedance between the sensor and monitoring electronics.
Additionally, the cable design supports Bently Nevada eddy-current probe scaling requirements by preserving the signal relationship between probe output, gap voltage, and displacement measurement. Proper cable installation helps maintain gap voltage validation accuracy, including standard -10 VDC target conditions used during proximity system verification.
The FEP insulated structure provides electrical separation between conductors and supports installation in industrial machinery monitoring environments. Therefore, the cable assembly contributes to accurate rotor dynamics analysis by maintaining consistent probe signal transmission.
Frequently Asked Questions (FAQ)
Q: What is the function of the Bently Nevada 330730-040-00-CN cable?
A: The cable extends the connection distance between a 3300 XL 11 mm proximity probe and associated monitoring electronics while maintaining the required triaxial signal characteristics.
Q: Does the 330730-040-00-CN require external power?
A: No. The extension cable is a passive component and does not consume electrical power.
Q: What installation practice should be followed for this extension cable?
A: Install the cable away from high-current power conductors and maintain proper shielding and grounding practices to reduce electrical interference.
Field Installation Guidelines
- Verify the cable model before installation to confirm compatibility with the 3300 XL 11 mm proximity probe configuration.
- Route the triaxial cable separately from AC motor power lines, variable frequency drive cables, and high-voltage switching circuits.
- Avoid sharp bends, mechanical stress, and excessive pulling force during installation.
- Maintain the cable shield and grounding arrangement according to the monitoring system installation requirements.
- Confirm probe, extension cable, and signal conditioner connections before system commissioning.
- Check gap voltage readings after installation to verify correct proximity probe operation.
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