Bently Nevada 330730-080-11-05 8m Extension Cable

3300 XL 11 mm Armored FluidLoc Cable – Bently Nevada 330730-080-11-05

Product Introduction

The Bently Nevada 330730-080-11-05 is a high‑performance extension cable designed specifically for the 3300 XL 11 mm proximity probe system. This 8.0‑meter cable combines armored protection with FluidLoc technology, which effectively prevents oil and other liquids from migrating through the cable interior. As a result, it significantly reduces the risk of machine contamination and signal degradation.

This model carries the 080 length option, meaning 8.0 metres (26.2 feet), and includes the 11 connector and cable option, which specifies armored FluidLoc construction. Furthermore, the 05 agency approval option confirms multiple global certifications, making it suitable for international installations. The cable’s triaxial FEP insulation delivers a typical capacitance of 69.9 pF/m, ensuring stable performance across a wide frequency range.

Users often choose this 3300 XL extension cable for steam turbines, compressors, and large rotating equipment. Its robust AISI 302 SST armor with an FEP outer jacket withstands severe mechanical stress, while the operating temperature range of ‑51°C to +177°C guarantees reliable operation in extreme conditions. Additionally, the gold‑plated ClickLoc connectors lock firmly into place, preventing accidental disconnection during machine operation.

Technical Specifications

Electrical Characteristics – The Bently Nevada 330730-080-11-05 offers a center‑conductor resistance of 2.0 ± 0.5 ohms and a coaxial‑conductor resistance of 0.6 ± 0.2 ohms for its 8.0‑m length. Its typical capacitance is 69.9 pF/m (21.3 pF/ft), which aligns perfectly with the 3300 XL proximity system requirements. For field wiring, we recommend using three‑conductor shielded triad cable with a cross‑section of 0.2 to 1.5 mm² (16 to 24 AWG). The maximum allowable field wiring length between the Proximitor Sensor and the monitor is 305 metres (1,000 feet), though you should consult the frequency response graph for signal rolloff at extended distances.

Mechanical Construction – The probe tip uses polyphenylene sulfide (PPS), while the probe case is manufactured from AISI 304 stainless steel. The cable itself is a 75‑ohm triaxial type with fluoroethylene propylene (FEP) insulation. For added durability, the optional armor consists of flexible AISI 302 stainless steel with an FEP outer jacket. This armored version weighs 140 g/m (1.5 oz/ft), compared to 45 g/m (0.5 oz/ft) for the unarmored cable.

Environmental Ratings – Both operating and storage temperatures range from ‑51°C to +177°C (‑60°F to +351°F). This wide tolerance allows the 3300 XL 11 mm extension cable to perform reliably in high‑heat turbine compartments as well as cold outdoor installations. Moreover, the FluidLoc option ensures that oil or moisture cannot escape through the cable’s interior, which is a common failure point in conventional designs.

Probe System Compatibility

The 330730-080-11-05 works seamlessly with all 3300 XL 11 mm probes, including armored and unarmored versions with ½‑20, 5⁄8‑18, M14 x 1.5, or M16 x 1.5 threads. Reverse‑mount probes with 3⁄8‑24 or M10 x 1 threads are also fully compatible. Every component in this transducer system uses gold‑plated brass ClickLoc connectors, which provide a positive locking action. Meanwhile, the patented TipLoc molding method creates a robust bond between the probe tip and body, while CableLoc technology ensures a pull strength of 330 N (75 lb) at the probe‑cable attachment point.

For installations in humid or moist environments, we strongly recommend using connector protectors (supplied with each extension cable). Alternatively, silicone tape is included and can serve as a temporary seal, but please note that tape is not suitable for applications where the connection will be exposed to turbine oil. Additionally, each probe comes standard with a locknut featuring pre‑drilled safety wire holes, which adds an extra layer of vibration resistance.

Linear Range and Gap Setting

The 3300 XL 11 mm system provides a linear range of 4.0 mm (160 mils), starting from approximately 0.5 mm (20 mils) off the target and extending to 4.5 mm (180 mils). This corresponds to an output voltage of roughly –1 to –17 Vdc. For applications that require extended deviation from straight line (DSL) capability, the range expands to 0.5 – 5.0 mm (20 – 200 mils), or –1 to –19 Vdc. However, this extended DSL range does not apply when zener barriers are used. The recommended gap setting for most installations is 2.5 mm (100 mils), which provides optimal linearity and sensitivity.

Installation Guidelines

Proper installation of the Bently Nevada 330730-080-11-05 ensures maximum performance and longevity. First, always handle the cable with care to avoid sharp bends or kinks, especially near the connectors. Next, connect the extension cable to the probe and the Proximitor Sensor by aligning the ClickLoc connectors and pushing firmly until they lock with an audible click. Then, secure the cable along its path using appropriate clamps or ties, keeping it away from hot surfaces or moving parts.

For armored cables, ensure that the armor does not come into contact with sharp edges that could compromise the FEP outer jacket. Furthermore, when routing the cable through conduit or bulkheads, use grommets or bushings to prevent abrasion. Finally, if you choose to install connector protectors, slide them over the mating points before locking the connectors; this step is especially critical in environments with high humidity or oil mist.

Packaging List

• 1 x 330730-080-11-05 3300 XL 11 mm Armored Extension Cable (8.0 m)

• 1 x Set of connector protectors (recommended for humid environments)

• 1 x Silicone tape roll (for alternative sealing)

• 1 x Installation instruction leaflet

• 1 x Anti‑static packaging bag

Shipping method: FedEx, UPS, or DHL (depending on destination and urgency).

Frequently Asked Questions (FAQ)

1. Can I use this 330730-080-11-05 cable with a 5‑meter probe?
Yes, the 3300 XL system allows combination of different probe and extension cable lengths as long as the total length does not exceed 10 metres (standard limit). Always verify the total capacitance and resistance to stay within Proximitor Sensor specifications.

2. Is the FluidLoc option mandatory for oil‑filled machines?
While not mandatory, we highly recommend the FluidLoc option for any machine where oil or process liquid could leak through the cable interior. This feature is specifically designed to prevent such leaks and is included in the 11 option code of this model.

3. What is the difference between armored and unarmored versions?
The armored version, like 330730-080-11-05, includes a flexible stainless‑steel sheath that protects against crushing, abrasion, and impact. Unarmored cables are lighter and more flexible but offer less mechanical protection. Choose based on your environment’s physical demands.

4. How do I clean the connectors before installation?
Use a lint‑free cloth lightly moistened with isopropyl alcohol to wipe the gold‑plated pins and sockets. Allow them to dry completely before mating. Avoid using abrasive materials that could damage the plating.

5. Can I extend the field wiring beyond 305 metres?
Extending beyond 305 metres (1,000 feet) may cause signal rolloff at high frequencies. Please consult the frequency response graph in the manual. For longer runs, consider using a signal conditioner or moving the Proximitor Sensor closer to the probe.