Bently Nevada 330730-040-13-CN 3300 XL Extension Cable

Bently Nevada 330730-040-13-CN 3300 XL Extension Cable

Product Introduction

The Bently Nevada 330730-040-13-CN is a high-performance 11 mm extension cable specifically engineered for the 3300 XL proximity probe system. This 4.0-meter cable is a critical component for connecting the probe to the Proximitor Sensor, ensuring accurate data acquisition for machinery protection. Furthermore, it comes with the FluidLoc option, which effectively prevents oil and other process liquids from migrating through the cable's interior. This feature is vital for maintaining the integrity of the machine’s lubrication system and preventing leaks. The connector protector option is also included, providing enhanced defense against moisture and humid conditions.

Technical Specifications

The 3300 XL 11 mm Extension Cable offers precise electrical characteristics for reliable operation. Its electrical design ensures minimal signal degradation over its length. For instance, the extension cable capacitance is typically 69.9 pF/m (21.3 pF/ft). Additionally, the DC resistance from the center conductor to center conductor (RCORE) is 1.0 ± 0.25 ohms, while the resistance from the coaxial conductor to coaxial conductor (RJACKET) is 0.3 ± 0.1 ohms.

The cable is constructed with a 75 Ω triaxial, fluoroethylene propylene (FEP) insulated material. This provides excellent dielectric strength and resistance to harsh chemicals. Moreover, the cable features gold-plated brass connectors, which ensure a corrosion-resistant and highly conductive connection point. This design minimizes signal loss and ensures long-term reliability in demanding applications. The total system length, including the probe and extension cable, can be configured as 5 or 9 meters.

For field wiring, the 330730-040-13-CN supports wire sizes from 0.2 to 1.5 mm² (16 to 24 AWG), or 0.25 to 0.75 mm² (18 to 23 AWG) when using ferrules. Bently Nevada recommends using a three-conductor shielded triad cable for optimal performance. The maximum length between the 3300 XL Proximitor Sensor and the monitor is 305 meters (1,000 feet).

Mechanical and Environmental Parameters

This model features the Armored FluidLoc cable option, which includes a flexible AISI 302 SST armor with an FEP outer jacket. This armor provides superior protection against physical damage and abrasion during installation and operation. Meanwhile, the connector protector offers additional safeguarding against moisture and humidity, making it an excellent choice for installations in wet or corrosive environments. Bently Nevada recommends connector protectors for all installations to maximize environmental protection.

The operating and storage temperature range for this extension cable is -51°C to +177°C (-60°F to +351°F). This wide range makes the 330730-040-13-CN suitable for use in extreme thermal conditions commonly found in turbine and compressor trains. Furthermore, the tensile strength is rated at 330 N (75 pounds) from probe case to probe lead and 270 N (60 pounds) at the probe lead to extension cable connectors, ensuring robust mechanical durability.

The unarmored cable weighs approximately 45 g/m (0.5 oz/ft) or 0.18 kg total, while the armored version weighs 140 g/m (1.5 oz/ft) or 0.56 kg total. This weight difference is important to consider for cable management and support during installation.

Linear Range and System Performance

The 3300 XL system, when used with this extension cable, delivers a linear range of 4.0 mm (160 mils). This range begins at approximately 0.5 mm (20 mils) from the target and extends from 0.5 to 4.5 mm (20 to 180 mils), corresponding to -1 to -17 Vdc. Moreover, an extended Deviation from Straight Line (DSL) range is available from approximately 0.5 to 5.0 mm (20 to 200 mils), covering -1 to -19 Vdc. However, this extended DSL range is not applicable when using zener barriers.

The recommended gap setting is 2.5 mm (100 mils). The Incremental Scale Factor (ISF) is 3.94 V/mm (100 mV/mil) with a ±10% tolerance, including interchangeability error when measured in 0.5 mm (20 mil) increments over the full 4.0 mm linear range. This high level of precision ensures consistent and reliable vibration monitoring across different installations.

Installation Guidelines

Proper installation of the 330730-040-13-CN is essential for optimal system performance. First, ensure that the connector between the probe and extension cable is clean and dry before mating. Second, the connector protector should be installed over the joint to prevent moisture ingress. Bently Nevada also supplies silicone tape with each extension cable as an alternative to the connector protector. Nevertheless, silicone tape is not recommended in applications where the probe-to-extension cable connection will be exposed to turbine oil, as the oil can degrade the tape's effectiveness.

Additionally, care should be taken to avoid sharp bends or kinks in the cable, especially with the armored version. The flexible AISI 302 SST armor provides excellent protection, but excessive bending may compromise its integrity. The cable should be routed securely to prevent movement or vibration-induced stress at the connection points. Finally, all connections should be torqued to the manufacturer's specifications to ensure reliable electrical contact.

Packaging List

• Bently Nevada 330730-040-13-CN 3300 XL 11 mm Extension Cable (4.0 meters, Armored FluidLoc with connector protector)

• Silicone tape (for optional use)

• Installation instruction sheet

• Anti-static packaging bag

Shipping Information

All orders are shipped via FedEx, UPS, or DHL with full tracking capabilities. Standard packaging ensures the product arrives in perfect condition, ready for immediate installation.

Frequently Asked Questions

1. What is the difference between the armored and unarmored version of the 330730-040-13-CN?
The armored version includes a flexible AISI 302 SST outer jacket with FEP coating, providing enhanced mechanical protection against abrasion and physical damage. The unarmored version is lighter and more flexible, suitable for less demanding environments.

2. Can I use this extension cable with other Bently Nevada probes?
This 3300 XL 11 mm extension cable is specifically designed for the 3300 XL 11 mm probe system. While it may physically connect to other probes, using it outside the designated 3300 XL system may affect performance and accuracy.

3. Is the connector protector mandatory for installation?
Bently Nevada recommends connector protectors for all installations to ensure maximum environmental protection. However, silicone tape is provided as an alternative, except in applications exposed to turbine oil.

4. What is the maximum field wiring length between the Proximitor Sensor and the monitor?
The maximum recommended length is 305 meters (1,000 feet). Longer lengths may result in signal rolloff at high frequencies, so consult the frequency response graph for specific applications.

5. How do I verify the correct gap setting for my application?
The recommended gap setting is 2.5 mm (100 mils). This setting positions the probe within the linear range of 0.5 to 4.5 mm, ensuring optimal output voltage between -1 and -17 Vdc for accurate measurements.