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- 330730-040-00-CN
- 3300 XL 11mm Extension Cable
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- 4.0 m
- 0.2kg
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Bently Nevada 330730-040-00-CN Extension Cable — Product Specifications, Description, Applications, and Related Models
1. Product Overview
The Bently Nevada 330730-040-00-CN is associated with the 3300 XL proximity measurement product family and is identified as an extension-cable model. Extension cables are used to connect a compatible proximity probe to its corresponding Proximitor Sensor, allowing the measurement signal to travel through the required cable path in a rotating-machinery monitoring installation.
Unlike a proximity probe, an extension cable does not directly measure shaft displacement or vibration. Instead, it forms part of the electrical measurement chain. Correct cable selection is important because cable length, connector type, electrical characteristics, and compatibility with the probe and sensor can affect the performance of the complete measurement system.
This type of cable is used in industrial facilities where rotating equipment requires continuous condition monitoring. Typical applications include turbines, compressors, generators, pumps, and other machinery in which shaft vibration and relative position measurements are important.
The exact configuration of the 330730-040-00-CN should be confirmed against the complete ordering code and the applicable product drawing. In particular, the cable length, connector arrangement, and meaning of the CN suffix should not be inferred solely from the model number.
2. Basic Product Information
| Parameter | Specification |
|---|---|
| Brand | Bently Nevada |
| Model | 330730-040-00-CN |
| Product series | 3300 XL proximity measurement system |
| Product family | 3300 XL extension cable |
| Product type | Proximity probe extension cable |
| Main function | Connects a compatible proximity probe to a compatible Proximitor Sensor |
| Measurement principle | Carries the electrical signal within an eddy-current proximity measurement system |
| Direct measurement function | None independently; measurement is performed by the complete probe-and-sensor system |
| Typical application | Shaft vibration and relative-position monitoring systems |
| Compatible equipment | Compatible 3300 XL probes, sensors, and monitoring instruments |
| Cable length | Configuration-specific; confirm the exact length for this model |
| Connector type | Must be verified against the exact model configuration |
| Electrical compatibility | Must match the probe and Proximitor Sensor requirements |
| Installation environment | Industrial machinery installations, subject to the cable’s rated conditions |
| Dimensions | Overall length and connector dimensions depend on the specified configuration |
| Weight (kg) | Exact net weight not verified; depends on cable length, connector construction, and packaging |
| Replacement considerations | Cable length, connector type, electrical characteristics, and system compatibility must match |
3. Detailed Technical Specifications
The 330730-040-00-CN is a 4.0 m extension cable intended for the 3300 XL 11 mm proximity transducer system. Its purpose is to extend the electrical connection between a compatible probe and Proximitor Sensor while preserving the electrical characteristics required by the complete measurement system.
| Parameter | Specification |
|---|---|
| Model | 330730-040-00-CN |
| Brand | Bently Nevada |
| Series | 3300 XL 11 mm |
| Product type | Extension cable |
| Cable length | 4.0 m (13.1 ft) |
| Cable type | Triaxial cable |
| Nominal impedance | 75 Ω |
| Insulation material | Fluorinated ethylene propylene (FEP) |
| Typical capacitance | Approximately 69.9 pF/m |
| Core resistance | Approximately 1.0 Ω, depending on the specified measurement method and cable configuration |
| Connector type | Miniature coaxial ClickLoc connectors |
| Connector arrangement | Probe-to-extension-cable and extension-cable-to-sensor connections |
| Minimum bend radius | Approximately 25.4 mm (1.0 in) |
| Operating temperature | Commonly specified for this cable family as approximately −51°C to +177°C; confirm the applicable configuration and approval documentation |
| Electrical function | Carries the probe signal within a matched proximity measurement system |
| Power consumption | Passive cable; no independent power consumption |
| Cable shielding | Triaxial construction designed for signal integrity |
| Cable outer dimensions | Approximately 6 mm diameter is a useful reference only; verify the actual cable drawing |
| Overall length | 4,000 mm, excluding any additional installation allowance |
| Connector dimensions | Configuration-specific; confirm the connector drawing |
| Net weight (kg) | Approximately 0.14–0.42 kg reported for this cable family and configuration; confirm the actual supplied cable |
| Shipping weight (kg) | Depends on packaging; some commercial listings quote substantially higher shipping weights than the cable’s net weight |
| Approval option | CN is associated with a special approval/configuration option; verify the exact applicable certifications for the supplied unit |
| Intended system | Compatible 3300 XL 11 mm proximity transducer system |
| Replacement requirement | Match cable length, connector configuration, probe, sensor, and system length |
The net weight figures above are approximate because cable-only and packaged weights are not equivalent. For engineering drawings, inventory control, and freight calculations, use the actual supplied unit’s specification rather than treating a shipping weight as the cable’s physical weight.
4. Model Number Interpretation
The model number contains several configuration fields. The most useful practical interpretation is summarized below.
| Model section | Interpretation |
|---|---|
| 330730 | 3300 XL 11 mm extension cable family |
| 040 | 4.0 m cable-length option |
| 00 | Standard cable and connector configuration |
| CN | Special approval or regional configuration suffix; verify the exact certification designation for the supplied unit |
The CN suffix should not be treated as proof of a particular hazardous-area approval without checking the applicable product documentation. When the cable is intended for a classified area, confirm that the complete probe, cable, sensor, and monitoring installation satisfies the site’s certification requirements.
5. Product Introduction
The 330730-040-00-CN is a signal interconnection component for a proximity transducer system. In a typical installation, the proximity probe is mounted close to a conductive machine target, such as a rotating shaft. The extension cable connects the probe to a compatible Proximitor Sensor, which processes the electrical behavior of the probe circuit and produces a measurement signal for the monitoring equipment.
The cable is an important part of the overall measurement system because its electrical characteristics contribute to the system’s calibration. A cable with the wrong length, construction, or connector arrangement can affect the behavior of the measurement circuit. For this reason, the extension cable must be selected as a matched component rather than simply as a cable of convenient length.
The 4.0 m configuration provides additional routing distance between the sensing point and the associated sensor. This can be useful when the probe is installed close to a machine casing while the sensor or monitoring cabinet is located farther away.
The cable is designed for industrial installations where machinery vibration, temperature variation, restricted installation space, and electrical interference may be relevant considerations. Its triaxial construction and FEP insulation are intended to support the signal transmission requirements of the compatible measurement system.
The cable does not independently measure vibration, shaft position, speed, or displacement. Those measurements depend on the compatible probe, Proximitor Sensor, target geometry, and monitoring instrument working together as a complete system.
6. Main Applications
6.1 Steam Turbine Monitoring
Steam turbines commonly use proximity transducer systems to monitor shaft vibration and relative shaft position. The extension cable connects the installed probe to the sensor, allowing the measurement signal to reach the monitoring equipment.
A correctly matched cable helps maintain the electrical characteristics of the measurement loop. This is important where vibration measurements are used to evaluate operating conditions and identify changes that may require inspection.
6.2 Gas Turbine Monitoring
Gas turbines often have restricted mounting space and demanding operating conditions. The probe may be installed near the shaft or bearing housing, while the associated sensor is positioned elsewhere for access and maintenance.
The 4.0 m extension cable provides a defined length for this connection. Correct routing and compatibility checks help maintain the intended measurement-system performance.
6.3 Compressor Condition Monitoring
Large compressors may require continuous shaft displacement and vibration monitoring. The extension cable provides the electrical connection between the proximity probe and its sensor.
In process plants, compressor monitoring signals may be used for trending, alarm functions, and machinery condition assessment. The extension cable supports this function by maintaining the required connection between compatible system components.
6.4 Generator Monitoring
Generators and other rotating electrical machines may use proximity probes to monitor shaft movement. The extension cable allows the measurement signal to travel from the probe location to the sensor.
Cable routing should be planned to avoid mechanical damage, sharp bends, excessive tensile loading, and unnecessary strain on the connectors.
6.5 Pump and Motor Installations
Large industrial pumps and motor-driven equipment may use proximity measurement systems where shaft movement is an important condition indicator.
The extension cable can provide the required connection between a probe and its compatible sensor. Before installation, confirm the cable length and connector arrangement against the equipment design.
6.6 Axial Position and Differential-Expansion Systems
In suitable system configurations, proximity transducer equipment can be used for axial position or differential-expansion measurements. The extension cable forms part of the electrical measurement chain.
These applications require a correctly designed probe arrangement and compatible monitoring system. The cable alone does not determine the measurement function.
6.7 Industrial Machinery Monitoring Cabinets
In many installations, the probe and monitoring equipment are not located next to one another. The extension cable provides a defined connection between the field-installed probe and the sensor.
A suitable cable length helps simplify routing and installation while avoiding unnecessary cable slack or tension.
7. Product Advantages
7.1 Designed for the 3300 XL 11 mm System
The cable belongs to the 3300 XL 11 mm extension cable family. When correctly matched with the probe and sensor, it supports the intended measurement-chain configuration.
7.2 Defined 4.0 m Cable Length
The 4.0 m length offers additional installation flexibility where the probe and sensor are separated by a moderate distance.
Choosing the correct cable length also helps avoid unnecessary cable coils and reduces the risk of routing problems.
7.3 Stable Electrical Characteristics
The cable’s specified impedance and capacitance are important to the electrical behavior of the complete proximity measurement system.
Using the correct cable helps preserve the designed system characteristics. Substituting a general-purpose cable may introduce electrical differences that affect measurement accuracy.
7.4 Triaxial Cable Construction
Triaxial cable construction supports the electrical requirements of the compatible measurement system and helps maintain signal integrity when properly installed.
The cable should still be routed according to the installation requirements and kept away from avoidable sources of mechanical damage or electrical interference.
7.5 FEP Insulation
FEP insulation is used in the cable construction and is suitable for a range of industrial temperature conditions within the specified limits.
The cable’s actual temperature suitability must be assessed using the exact configuration documentation and the conditions at the installation location.
7.6 Compact Installation
The cable can be routed between the probe and sensor without requiring a separate signal-conditioning device along its length. This simplifies the connection arrangement where a compatible extension cable is specified.
7.7 Supports Continuous Monitoring
The cable allows the signal from the proximity probe to reach the sensor and monitoring equipment. This supports continuous monitoring when the complete system is installed and operating correctly.
7.8 Defined Connector Arrangement
The specified connector configuration helps establish a consistent connection between compatible components. Correct connector matching is particularly important when replacing a cable in an existing installation.
8. Installation and Maintenance Recommendations
Before installing or replacing the cable, confirm that its full part number matches the requirements of the existing system.
– Check the total system length. The probe, extension cable, and Proximitor Sensor must form a compatible combination. Do not assume that a cable can be substituted solely because its connectors fit.
– Confirm connector compatibility. Inspect connector types, condition, and cleanliness before connection.
– Observe the minimum bend radius. Avoid sharp bends, crushing, or excessive strain. A bend radius of approximately 25.4 mm is commonly specified for this cable family, but the applicable technical specification takes precedence.
– Avoid pulling on the connectors. Support the cable during routing and installation to prevent damage at the terminations.
– Use appropriate cable routing. Keep the cable away from hot surfaces, moving parts, and other sources of mechanical damage.
– Do not splice or shorten the cable without an approved procedure. Changing cable length or construction can alter the electrical characteristics of the measurement loop.
– Check the complete measurement chain. After installation, verify the probe, extension cable, sensor, and monitoring channel according to the system commissioning procedure.
– Confirm hazardous-area requirements. If the equipment is installed in a classified area, verify the approval status of all relevant components and the complete installation.
9. Five Related Models and Product Options
The following table provides a practical comparison of related cables and components. The cable models listed are alternatives for configuration review, not automatic substitutes. Exact ordering options must be confirmed before purchase.
| Model | Product series/type | Main function | Key parameters | Dimensions | Weight (kg) |
|---|---|---|---|---|---|
| 330730-040-00-CN | 3300 XL 11 mm extension cable | Connects probe to sensor | 4.0 m cable; triaxial construction; 75 Ω nominal impedance; special approval/configuration suffix | Length 4,000 mm; cable diameter approximately 6 mm | Approximately 0.14–0.42 kg; verify actual unit |
| 330730-040-00-00 | 3300 XL 11 mm extension cable | Standard extension connection | 4.0 m; standard cable option; verify required approvals | Length 4,000 mm; connector dimensions configuration-specific | Approximately 0.14–0.20 kg reported for cable-only versions |
| 330730 Series | 3300 XL 11 mm extension cable | Extends the probe-to-sensor connection | Multiple cable-length and configuration options may be available | Depends on selected length | Depends on configuration |
| 330710 Series | 3300 XL 11 mm proximity probe | Measures shaft displacement and relative position | 11 mm probe family; requires a compatible extension cable and sensor | Depends on exact probe configuration | Depends on model |
| 3300 XL Proximitor Sensor | Signal-conditioning sensor | Processes the probe measurement signal | Must match the probe and cable system configuration | Depends on exact sensor model | Depends on model |
Important: A proximity probe, extension cable, and Proximitor Sensor perform different functions. Replacing one with another is not possible. When selecting an alternative cable, verify the total system length and electrical compatibility.
10. Five Other Common Bently Nevada Models and Product Families
The following product families are relevant to industrial machinery monitoring. They are included as related equipment and common system components, not as direct replacements for the 330730 extension cable.
| Model | Product type | Main application | Key parameters | Dimensions | Weight (kg) |
|---|---|---|---|---|---|
| 330710 Series | 3300 XL 11 mm proximity probe | Shaft displacement and vibration-related measurements | 11 mm probe family; requires a compatible cable and Proximitor Sensor | Depends on complete part number | Depends on configuration |
| 330101 Series | 3300 XL 8 mm proximity probe | Shaft vibration and displacement measurement | 8 mm probe family; different mechanical and electrical configuration from the 11 mm family | Depends on exact model | Depends on configuration |
| 330103 Series | 3300 XL 8 mm proximity probe | Non-contact shaft monitoring | Select according to mounting, cable, sensor, and measurement requirements | Depends on exact model | Depends on configuration |
| 3300 XL Proximitor Sensor | Signal-conditioning sensor | Converts probe measurements into system signals | Must match the probe family and cable configuration | Depends on sensor model | Depends on configuration |
| 3500/42M | Machinery monitoring module | Vibration and position monitoring in a compatible rack system | Multi-channel monitoring functions depend on the installed configuration and system setup | Rack-module dimensions; verify module drawing | Depends on module and packaging |
These products belong to different parts of a machinery monitoring installation. The probe senses the target gap, the extension cable carries the signal, the Proximitor Sensor conditions the signal, and the monitoring module processes the resulting measurement according to its supported functions.
11. Comparison of the Main Cable Options
| Selection factor | 330730-040-00-CN | 330730-040-00-00 | Other 330730 configurations |
|---|---|---|---|
| Product type | Extension cable | Extension cable | Extension cable |
| Nominal cable length | 4.0 m | 4.0 m | Depends on ordering option |
| Connector and cable configuration | Standard configuration associated with 00; verify exact supplied version |
Standard cable option | Depends on full model number |
| Approval designation | Special CN suffix; verify applicable approvals |
00 approval option |
Depends on suffix |
| System compatibility | 3300 XL 11 mm system, subject to complete matching | 3300 XL 11 mm system, subject to complete matching | Must be confirmed |
| Direct replacement suitability | Depends on the installed configuration and approval requirements | Depends on the installed configuration and approval requirements | Depends on the exact model |
| Dimensions | 4.0 m cable plus connectors | 4.0 m cable plus connectors | Depends on cable length |
| Net weight (kg) | Approximately 0.14–0.42 kg reported; verify actual unit | Approximately 0.14–0.20 kg reported for cable-only versions | Depends on length and construction |
The key difference between the CN and 00 variants is the ordering configuration and approval designation, not the basic function of the extension cable. The exact certification requirements should be checked before substituting one version for another.
12. Ordering Checklist
Before purchasing the 330730-040-00-CN, confirm the following details:
1. The full model number is correct, including the CN suffix.
2. The cable length is 4.0 m and is suitable for the installed probe-to-sensor arrangement.
3. The connector configuration matches the probe and Proximitor Sensor.
4. The cable is compatible with the 3300 XL 11 mm proximity measurement system.
5. The total system length meets the requirements of the selected probe and sensor.
6. The applicable approvals satisfy the installation requirements, particularly for classified hazardous areas.
7. The physical cable length, connector dimensions, and bend-radius requirements are suitable for the available installation space.
8. The net weight is distinguished from shipping weight when preparing inventory, packing, and freight documents.
9. Any replacement cable is checked for electrical compatibility before the measurement channel is returned to service.
13. Conclusion
The Bently Nevada 330730-040-00-CN is a 4.0 m extension cable associated with the 3300 XL 11 mm proximity measurement system. Its main function is to connect a compatible proximity probe to its Proximitor Sensor while maintaining the electrical characteristics required by the complete measurement loop.
The cable is relevant to industrial installations involving turbines, compressors, generators, pumps, and other rotating machinery. Its principal advantages are its defined cable length, system-specific electrical characteristics, triaxial construction, and suitability for integration into a compatible proximity measurement arrangement.
For procurement and replacement, the most important checks are the full ordering code, cable length, connector type, electrical compatibility, and applicable approvals. The exact net weight and connector dimensions should be confirmed from the supplied unit’s technical specification, particularly when accurate engineering or shipping data is required.