Introduction
The Bently Nevada 330130-040-00-RU is a 3300 XL Standard Extension Cable designed to extend the electrical connection between a compatible 3300 XL proximity probe and Proximitor Sensor. As part of the 3300 XL 8 mm Proximity Transducer System, it supports the signal path used for shaft vibration, position, speed, and related rotating-machinery measurements.
The 040 configuration specifies a 4.0 meter (13.1 ft) cable length, while 00 identifies the standard cable configuration. The final RU represents a country-specific agency approval option. This makes the model particularly relevant when a project requires the corresponding regional approval configuration rather than the standard non-approved version.
The standard cable uses a 75 Ω triaxial construction with FEP insulation and has a typical capacitance of 69.9 pF/m (21.3 pF/ft). These characteristics are part of the overall electrical design of the 3300 XL proximity measurement system and should be considered together with the probe and Proximitor Sensor configuration.
For maintenance departments and system integrators, the 330130-040-00-RU provides a practical 4-meter solution when a standard extension cable with the RU-specific approval configuration is required. It is a strong replacement choice for compatible existing 3300 XL installations where matching the original system specification is a priority.
Technical Specifications
| Specification | Details |
|---|
| Manufacturer | Bently Nevada |
| Model Number | 330130-040-00-RU |
| Product Series | 3300 XL |
| Product Type | Standard Extension Cable |
| Cable Length | 4.0 m (13.1 ft) |
| Length Code | 040 |
| Cable Configuration | Standard Cable |
| Cable Option | 00 |
| Agency Approval Option | RU — Country-Specific Approval |
| Cable Construction | 75 Ω Triaxial |
| Insulation | FEP |
| Typical Capacitance | 69.9 pF/m (21.3 pF/ft) |
| Nominal Linear Weight | Approximately 34 g/m |
| Approximate Cable Weight | 0.14 kg |
| Minimum Bend Radius | Approximately 25.4 mm (1.0 in) |
| Primary Function | Probe-to-Proximitor signal connection |
| System Application | 3300 XL 8 mm Proximity Transducer System |
| Typical Measurements | Shaft vibration, position, speed and phase reference |
Applications
Turbine Shaft Monitoring
The 330130-040-00-RU can be incorporated into proximity monitoring systems used on steam and gas turbines. The 4-meter length allows practical routing between shaft-mounted sensing locations and remotely positioned Proximitor Sensors.
Compressor Monitoring
In compressor trains, proximity probes are often installed near bearings while signal-conditioning electronics are located at a more accessible point. This extension cable provides the connection needed between those components.
Generator Condition Monitoring
Generators and other large rotating electrical machines can use proximity systems to monitor shaft movement and vibration. The 4.0-meter configuration offers useful installation flexibility for these applications.
Pump and Motor Protection
Industrial pumps, motors, and motor-driven machinery can use compatible 3300 XL proximity systems as part of continuous condition monitoring and machinery protection strategies.
Fluid-Film Bearing Machinery
The 3300 XL 8 mm proximity system is well suited to machinery using fluid-film bearings. The extension cable forms part of the complete measurement circuit used to observe shaft position and dynamic movement.
Speed and Phase Reference
When used within a properly configured 3300 XL system, compatible proximity sensors can support speed and Keyphasor-related measurements. The extension cable maintains the electrical path between the field sensor and monitoring electronics.
Regional Compliance Projects
The RU approval configuration is useful for projects where the corresponding country-specific regulatory option is specified. For hazardous-area applications, the exact certification marking should always be checked against the project documentation and equipment nameplate.
Replacement and Retrofit Applications
The model is particularly valuable when an existing 3300 XL system requires a like-for-like replacement with a 4-meter standard cable and RU approval configuration.
Advantages
Purposeful 4 Meter Length
The 4.0-meter length provides a practical amount of routing freedom for many machinery installations without introducing excessive cable slack.
Standard Cable Configuration
The 00 cable option keeps the design straightforward and is appropriate where a standard cable is specified rather than an armored or connector-protected alternative.
RU Approval Configuration
The final RU designation provides a country-specific agency approval configuration, making this version distinct from the standard -00-00 model and other regional variants.
75 Ω Triaxial Construction
The 75 Ω triaxial construction is designed around the electrical requirements of the 3300 XL proximity system, helping maintain the intended signal characteristics.
FEP Insulation
FEP insulation provides a durable insulating material for industrial instrumentation applications and supports reliable performance across a broad operating-temperature range.
Consistent Electrical Characteristics
The typical 69.9 pF/m capacitance is an important parameter when matching the extension cable to the rest of the proximity transducer system.
Manageable Weight
At approximately 34 g/m, the cable is relatively light and can be routed and secured without adding significant mechanical load to an installation.
Controlled Cable Routing
A minimum bend radius of approximately 25.4 mm gives installers a clear practical guideline for routing the cable while avoiding excessively tight bends.
Maintenance-Friendly Replacement
The clearly defined 4-meter length and RU approval option make the model convenient to identify when replacing an existing component with the same configuration.
Suitable for Critical Machinery
The cable supports the signal path used in monitoring systems for high-value rotating equipment, helping maintain a reliable connection between sensing and signal-conditioning components.
Technical FAQs
1. What is the Bently Nevada 330130-040-00-RU?
It is a 3300 XL Standard Extension Cable used to connect a compatible proximity probe with a Proximitor Sensor in a 3300 XL 8 mm proximity transducer system.
2. What is the cable length?
The cable is 4.0 meters (13.1 feet) long. The 040 code identifies this length option.
3. What does the first “00” mean?
The first 00 identifies the standard cable configuration.
4. What does “RU” represent?
The RU suffix identifies a country-specific agency approval configuration. The exact regulatory scope should be confirmed against the applicable project and certification requirements.
5. What is the cable capacitance?
The typical capacitance is approximately 69.9 pF/m (21.3 pF/ft).
6. What cable construction is used?
The standard cable is specified as a 75 Ω triaxial cable with FEP insulation.
7. What is the approximate weight?
The cable weighs approximately 0.14 kg, with a nominal linear cable weight of about 34 g/m.
8. What is the minimum bend radius?
The stated minimum bend radius is approximately 25.4 mm (1.0 inch). Keeping the cable above this minimum during installation helps reduce mechanical stress.
9. Where can this cable be used?
It can be used in compatible 3300 XL proximity monitoring arrangements for turbines, compressors, generators, pumps, motors, fluid-film bearing machinery, and other rotating equipment.
10. What should be checked before ordering a replacement?
Verify the cable length, cable option, RU approval configuration, connected probe, Proximitor Sensor, and total electrical system length. The probe and extension cable form one complete electrical measurement system, so the cable should not be selected based solely on physical distance.
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