330879-02-01 Bently Nevada 3300 XL 50mm Extension Cable

330879-02-01 | 3300 XL 50 mm Extension Cable

Brand: Bently Nevada™ | Type: 3300 XL 50 mm Extension Cable | Part No.: 330879-02-01 (Right Exit, Single DE Bracket)

Application: Differential expansion (DE) and rotor expansion (RX) measurement for large steam turbine generators. Compatible with 3300 XL 50 mm Proximitor Sensor.

Oiltech Controls’s Insight

• This cable is part of the 3300 XL 50 mm transducer system – the longest linear range (27.9 mm) in the eddy current line.
• Designed for harsh turbine environments: probe rated -35°C to +120°C, Proximitor and cable -35°C to +65°C.
• Linear range starts at 1.3 mm (50 mils) from target, extends to 29.2 mm (1150 mils) – ideal for large casings.
• Average scale factor 394 mV/mm (10 mV/mil) – consistent, repeatable measurements.
• Field wiring: 0.2–1.5 mm² (16–24 AWG) shielded triad cable recommended.

Key Technical Specifications

• Linear Range: 27.9 mm (1100 mils) – from 1.3 mm to 29.2 mm (approx. –1.5 to –12.5 Vdc).
• Average Scale Factor (ASF): 394 mV/mm (10 mV/mil) nominal.
• Deviation from Best Fit Straight Line (DSL): Less than ±0.74 mm (±29 mils).
• Output Resistance: 50 Ω.
• Extension Cable Capacitance: 69.9 pF/m (21.3 pF/ft) typical.
• Power Requirement: -17.5 Vdc to -26 Vdc (without barriers), -23 Vdc to -26 Vdc (with barriers).
• Recommended Minimum Target Size: 102 mm (4.0 in) diameter (flat target).
• Cable Material: 75 Ω triaxial, PFA insulated, FluidLoccable.

Compatibility & Ordering Details

• Probe Clamp Style: 02 = Right Exit.
• DE Mounting Bracket: 01 = Single DE Mounting Bracket.
• Note: B01 bracket only available with A01 or A02 probe clamp styles.
• System components: 50 mm probe + extension cable + 3300 XL 50 mm Proximitor Sensor.
• Made in U.S.A.

Installation & Maintenance

• Mounting: Standard 3300 XL probe mounting brackets – plug‑and‑play.
• Field wiring: Use three‑conductor shielded triad cable (16–24 AWG).
• Maintenance: No routine calibration; inspect cable for damage.
• Environmental tolerance: Probe –35°C to +120°C; Proximitor & cable –35°C to +65°C.

Typical Equipment Suitability

• Large steam turbine generators (differential expansion / rotor expansion).
• Compressors, pumps, and fans with large casing growth.
• Any rotating machinery requiring long‑range position monitoring.

Professional FAQ – Experience & Selection Guide

• What is the practical linear range in real turbine applications?
  The linear range is 27.9 mm (1100 mils). In field use, the target should be within 1.3 mm to 29.2 mm for best accuracy. Ensure target surface is flat and at least 102 mm diameter.
• Can I use this cable with older Bently probes?
  This cable is designed specifically for 3300 XL 50 mm probes. For older 3300 series, check connector compatibility – the 3300 XL uses a different triaxial interface.
• What is the effect of temperature on measurement?
  Over the probe’s -35°C to +120°C range (with Proximitor 0‑45°C), DSL stays within ±2.03 mm. For high‑temperature turbine casings, position the Proximitor sensor in a cooler area.
• How do I select the right bracket option?
  Choose 02 (right exit) for vertical or horizontal mounting where cable exits to the right. If you need left exit or different bracket, refer to 330879‑01‑xx or 330879‑03‑xx options.
• What is the recommended field wiring practice?
  Use 0.2‑1.5 mm² (16‑24 AWG) shielded triad cable. Keep cable runs under 305 m (1000 ft) to avoid signal degradation. Ground the shield at the monitor end only.

Why Buy From Oiltech Controls?

• Over 15 years supplying industrial automation spare parts.
• Global shipping via FedEx, UPS, DHL – 24‑28 hour dispatch.
• Tested surplus and refurbished options available.
• 12‑month warranty with technical verification before shipment.
• Expert support for obsolete control systems.

Contact: info@oiltechcontrols.com  |  +86 158 8020 0923

Original Source: https://www.oiltechcontrols.com/
Copyright © 2026 Oiltech Controls Limited. All rights reserved.