Bently Nevada 330930 Series Modules

Technical Dossier

Product Details And Specifications

Bently Nevada 330930 Series: Comprehensive Module Range and Technical Overview

The Bently Nevada 330930 series comprises the NSv (Non-contacting Velocity) Extension Cable assemblies used in conjunction with 3300 XL and 3500 series proximity transducer systems. These cables are deployed across critical rotating machinery monitoring installations in chemical processing plants, nuclear power stations, petroleum refineries, LNG terminals, and offshore platforms. The 330930 series serves as the signal transmission backbone between proximity probes and monitoring system rack modules, operating in environments where signal integrity, EMI shielding, and mechanical durability are non-negotiable engineering requirements. Global installed base spans OEM turbomachinery from GE, Siemens, MAN Energy Solutions, and Mitsubishi Heavy Industries, making long-term parts availability a maintenance-critical concern for asset operators worldwide.

The Evolution of 330930 Architecture

The 330930 extension cable series was introduced as part of Bently Nevada's transition from the legacy 3300 series transducer ecosystem toward the 3300 XL platform in the mid-1990s. Early-generation cables used a standard coaxial construction with RG-type inner conductors and basic polyurethane jacketing, suitable for ambient-temperature installations. As industrial environments demanded higher thermal tolerance and chemical resistance, the cable jacket material evolved to incorporate armored and high-temperature variants, reflected in the suffix coding system (e.g., -00 for standard, -01 for armored).

The introduction of the NSv (Non-contacting Velocity) measurement standard required tighter impedance tolerances across the cable assembly, driving a redesign of the connector termination and shielding architecture. By the 2000s, the 330930 series had standardized on a triaxial cable geometry with a defined characteristic impedance of 95 Ω, compatible with the 3300 XL 8mm and 11mm probe systems as well as the 3500/42M velocity monitor modules.

As of 2020, Bently Nevada (now a Baker Hughes company) has transitioned primary product focus to the System 1 and Orbit 60 platforms. The 330930 series remains in active catalog status for spare parts but is no longer positioned as a new-installation product line. Facilities running legacy 3300 XL or early 3500 racks are advised to maintain buffer stock of 330930 cables, as lead times from the OEM have extended significantly.

330930 Full Catalog & Functionalities (SKU List)

The following SKUs represent the verified active and recently-obsoleted part numbers within the Bently Nevada 330930 NSv Extension Cable series. Classification follows cable length, jacket type, and connector configuration.

Standard Extension Cables (Non-Armored)

• 330930-060-04-00: NSv extension cable, 5 ft (1.5 m), standard polyurethane jacket, standard connectors
• 330930-060-05-00: NSv extension cable, 9 ft (2.7 m), standard polyurethane jacket, standard connectors
• 330930-060-06-00: NSv extension cable, 15 ft (4.6 m), standard polyurethane jacket, standard connectors
• 330930-060-07-00: NSv extension cable, 25 ft (7.6 m), standard polyurethane jacket, standard connectors
• 330930-060-08-00: NSv extension cable, 50 ft (15.2 m), standard polyurethane jacket, standard connectors
• 330930-060-09-00: NSv extension cable, 100 ft (30.5 m), standard polyurethane jacket, standard connectors
• 330930-060-10-00: NSv extension cable, 150 ft (45.7 m), standard polyurethane jacket, standard connectors
• 330930-060-11-00: NSv extension cable, 200 ft (61.0 m), standard polyurethane jacket, standard connectors

Armored Extension Cables

• 330930-060-04-01: NSv extension cable, 5 ft, stainless steel armored jacket, high-vibration environments
• 330930-060-05-01: NSv extension cable, 9 ft, stainless steel armored jacket, high-vibration environments
• 330930-060-06-01: NSv extension cable, 15 ft, armored jacket, chemical plant routing
• 330930-060-07-01: NSv extension cable, 25 ft, armored jacket, offshore platform rated
• 330930-060-08-01: NSv extension cable, 50 ft, armored jacket, refinery tray routing

High-Temperature Variants

• 330930-060-06-02: NSv extension cable, 15 ft, high-temp PTFE jacket, rated to +200°C ambient
• 330930-060-07-02: NSv extension cable, 25 ft, high-temp PTFE jacket, steam turbine proximity
• 330930-060-08-02: NSv extension cable, 50 ft, high-temp PTFE jacket, hot section compressor trains

Compatible Probe & Driver References

• 330180-91-05: 3300 XL 8mm probe, standard, used with 330930 cables in radial vibration loops
• 330780-91-05: 3300 XL 11mm probe, standard, paired with 330930 long-run cables
• 330104-00-06-10-02-00: 3300 XL driver, compatible termination for 330930 triaxial assemblies

Sourcing Hard-to-Find & Obsolete 330930 Parts

DriveKNMS maintains a dedicated inventory program for Bently Nevada 330930 series cables, including variants that have been discontinued from the Baker Hughes active catalog. The primary sourcing challenge for end-users is the combination of long OEM lead times (typically 16–26 weeks for non-standard lengths) and the absence of approved third-party manufacturers for safety-critical vibration monitoring cables.

DriveKNMS addresses this through three supply channels: (1) verified surplus stock acquired from decommissioned plant inventories and OEM overstock programs, (2) direct procurement from authorized Bently Nevada distributors in North America, Europe, and Asia-Pacific, and (3) a cross-reference database that maps legacy 330930 part numbers to current 3500-series compatible alternatives where applicable.

For facilities operating under API 670 compliance requirements, DriveKNMS provides full traceability documentation including certificate of conformance, country of origin, and batch records. Armored variants (suffix -01) and PTFE high-temperature variants (suffix -02) are stocked in limited quantities and subject to prior availability confirmation. Customers requiring cables for nuclear-qualified installations (IEEE Class 1E) are advised to contact our technical team directly for qualification documentation review.

Quality Control for the 330930 Range

The 330930 series presents specific quality verification challenges due to its triaxial cable geometry and precision-impedance connector terminations. Standard coaxial cable testers are insufficient for validating these assemblies. DriveKNMS applies the following test protocol to all 330930 units prior to dispatch:

• Characteristic Impedance Verification: TDR (Time Domain Reflectometry) measurement across the full cable length to confirm 95 Ω ± 2 Ω tolerance, detecting any impedance discontinuities from connector damage or cable kinking.
• Insulation Resistance Test: 500 VDC megohmmeter test between inner conductor, shield, and outer jacket to confirm IR > 1,000 MΩ, ruling out moisture ingress or jacket degradation.
• Continuity and Shield Integrity: Four-point continuity check on inner conductor, inner shield, and outer shield independently, verifying no open circuits or cross-connections.
• Connector Torque and Retention: Physical inspection and pull-test on both male and female connector ends to confirm proper crimp retention and thread engagement.
• Visual and Dimensional Inspection: Jacket OD measurement, armor condition check (for -01 variants), and end-to-end visual inspection for cuts, abrasions, or connector corrosion.
• Functional Loop Simulation: Where test bench availability permits, cables are inserted into a 3300 XL or 3500 series test loop with a calibrated proximity probe driver to verify signal transmission within Bently Nevada-specified parameters.

All test records are retained for a minimum of 7 years and are available to customers upon request as part of the quality documentation package.