330730-080-01-00 | Bently Nevada | 3300 XL 11 mm Extension Cable

Configured for signal transmission in TSI platforms, the Bently Nevada 330730-080-01-00 (330730 Extension Cable) provides direct physical/electrical execution.

Suffix Breakdown & Model Matrix

• 330730: 3300 XL 11 mm Extension Cable base model.
• 080: 8.0 meters (26.2 feet) total length.
• 01: Armored cable configuration (Flexible AISI 302 SST with FEP jacket).
• 00: No agency approval required.

Hardware Specifications

Mechanical Monitoring and TSI Characteristics

The 330730 extension cable acts as a segment of the 3300 XL transducer loop, which relies on eddy-current probe scaling to convert shaft motion into a proportional voltage signal. Achieving correct gap voltage validation, targeting -10 VDC at the Proximitor output, requires the preservation of the electrical impedance characteristic of this cable. Installers must prioritize cross-talk suppression by maintaining spatial separation between this extension cable and high-energy power lines. Any degradation in the cable shield or mechanical armor will introduce electromagnetic noise, resulting in errors in rotor dynamics data collection.

Frequently Asked Questions

Q: Can the 8.0 meter cable length be field-trimmed if the installation path is shorter than expected?

A: No. The transducer system is calibrated as a matched set including the probe, extension cable, and Proximitor. Altering the cable length changes the system impedance, which degrades frequency response and measurement linearity.

Q: Does the AISI 302 SST armor impact the electrical performance of the cable?

A: No. The stainless steel armor provides mechanical protection against abrasion and physical stress without altering the electrical characteristics, such as the 69.9 pF/m nominal capacitance.

Field Installation Guidelines

• Connector Mating: Ensure ClickLoc connectors are fully engaged. Do not use tools to apply torque; tighten by hand until the locking mechanism seats.
• Cable Handling: Observe a minimum bend radius of 25.4 mm (1.0 in) to protect the internal coaxial structure and the integrity of the flexible armor.
• Shield Grounding: The cable shield must remain continuous to the Proximitor mounting base. Ensure a low-impedance connection to the machine chassis to reject common-mode noise.
• Installation Environment: While the cable is rated for -51 deg C to +177 deg C, ensure the connector junctions are protected from fluid ingress or corrosive chemicals that could permeate the FEP jacket.
• Mechanical Securing: Use non-metallic cable clamps to secure the armored extension cable at regular intervals to prevent wear from machine vibration.