Configured for signal transmission between proximity probes and Proximitor sensors in 3300 XL monitoring systems, the Bently Nevada 330130-070-01-05 (330130 Extension Cable) provides direct electrical connectivity. This component maintains the required system impedance to ensure accurate non-contacting vibration and position data acquisition across the measurement loop.

Catalog Configuration Breakdown

The specified model follows the standard Bently Nevada 3300 XL series configuration:

• 330130: 3300 XL Extension Cable

• 070: Cable Length (7.0 meters)

• 01: Connector Type (Standard connector with connector protector)

• 05: Agency Approval (Multiple approvals)

Hardware Specifications

Signal Integrity & Rotor Dynamics

System accuracy in 3300 XL installations relies on precise impedance matching between the probe, extension cable, and Proximitor sensor. The 75 ohm characteristic impedance of this cable is fundamental to the 1 MHz radio frequency signal path. Cross-talk suppression is achieved through the triple-shielded construction of the cable, which prevents electromagnetic interference from neighboring high-voltage lines or variable frequency drives. During installation, maintaining the integrity of the coaxial shield is required to prevent ground loops that could introduce noise into the -10 VDC gap voltage signal, directly impacting the fidelity of rotor vibration data.

Ordering Information

• 1 x 330130-070-01-05 Extension Cable

• 2 x Connector protectors (pre-installed)

• Technical installation sheet

Cable Routing & Field Installation

• Avoid bending the cable to a radius smaller than 38 mm to prevent damage to the inner conductor or dielectric.

• Ensure all cable connections are made using the provided ClickLoc mechanism to guarantee a secure, vibration-resistant connection.

• Route the extension cable through metallic conduit, separated from AC power lines, to maintain signal isolation.

• Use provided connector protectors to prevent the ingress of moisture or conductive debris at the coupling points.

• Verify that the total system length (Probe + Extension Cable) matches the Proximitor sensor calibration (typically 5 or 9 meters).

Technical Support FAQs

• Q: Can this cable be shortened in the field?

  A: No, shortening the cable alters the system impedance and resonant frequency, which will cause measurement errors. Use the factory-specified length.

• Q: Is the outer jacket resistant to synthetic turbine oil?

  A: Yes, the FEP jacket provides high chemical resistance to common industrial lubricants and hydraulic fluids used in rotating equipment.

• Q: Does the connector need to be grounded?

  A: The connector shell is grounded via the conduit or mounting bracket; the signal path remains isolated to avoid ground loops.

• Q: What is the maximum pull force allowed during installation?

  A: Do not exceed 275 N of pull force to avoid stretching the center conductor and changing its impedance.

• Q: How to check for cable continuity?

  A: Use a digital multimeter to measure resistance between the center pin and outer shell; verify against nominal values (typically near 0 ohm center to center).

• Q: Can this cable be used with 3300 series (non-XL) probes?

  A: No, 3300 XL cables are designed specifically for the 3300 XL system frequency and are not compatible with standard 3300 series components.

• Q: What if the connector protector is missing?

  A: Use an approved sealant tape or secondary enclosure to protect the connection from moisture, as the connector is not intrinsically sealed.

• Q: How does cable length affect Proximitor output?

  A: The system is calibrated for a fixed total length; adding or removing length introduces signal attenuation and phase shifts in the vibration output.