Bently Nevada 330930-040-00-05 3300 XL NSv Extension Cable
The Bently Nevada 330930-040-00-05, also cataloged as the 330930 extension cable, operates as a dedicated coaxial transmission element for NSv‑type eddy‑current proximity measurement loops within 3300 XL systems. The cable maintains controlled impedance and stable gap‑voltage propagation between probe and proximitor modules.
Suffix Breakdown & Model Matrix
330930 = 3300 XL NSv extension cable
040 = Cable length 4.0 m (13.1 ft)
00 = No stainless‑steel armor
05 = Multiple hazardous‑area approvals
Hardware Specifications
Parameter
Specification
Model
330930-040-00-05
Brand
Bently Nevada
Origin
U.S.A
Weight
Not specified (shipping weight typically 2 kg class)
Dimensions
Cable length 4.0 m
Operating Temp
-52 deg C to +100 deg C
Power Consumption
Passive coaxial link
Connector Type
Gold‑plated brass connectors with protectors
Cable Type
Non‑armored coaxial
Product Type
Extension cables
Eddy‑Current Signal Transmission and Gap‑Voltage Stability
The extension cable preserves calibrated impedance required for NSv eddy‑current measurement chains. When paired with matched probes and proximitor modules, the cable supports stable −10 VDC gap‑voltage behavior and linear displacement scaling. Gold‑plated connector interfaces reduce contact resistance and maintain shielding continuity, suppressing cross‑talk in multi‑channel installations.
Frequently Asked Questions
Q: Can the cable be installed while the proximitor remains energized? A: No. Hot‑swap actions may cause transient gap‑voltage disturbances and should be avoided.
Q: Does changing cable length affect NSv calibration? A: Yes. Probe, extension cable, and proximitor lengths are factory‑matched. Any deviation alters impedance and displacement scaling.
Q: Should shielding be bonded at both ends? A: No. Shielding must be bonded at the proximitor end only to prevent ground‑loop formation.
Field Installation Guidelines
Route the coaxial cable with gentle bend radii to maintain impedance stability. Maintain separation from high‑current conductors or variable‑frequency drive outputs to reduce electromagnetic interference. Ensure full seating of gold‑plated connectors and apply strain relief to minimize vibration‑induced motion. Avoid sharp bends or compression that may deform the coaxial geometry.
