Description
Product Overview
The Bently Nevada 16925-30 is a 30-foot shielded interconnect cable for proximity probe sensors, used in Bently Nevada 3500 series Turbine Supervisory Instrumentation (TSI) machinery protection systems. It connects eddy current proximity probes to extension cables or monitor rack I/O modules, transmitting low-level gap measurement signals for shaft vibration, shaft position and thrust monitoring. The cable features one end with a 3-pin plug connector and the other end with bare terminal lugs, designed for precise machinery condition monitoring in rotating equipment.
Technical Specifications
| Parameter | Details |
|---|---|
| Manufacturer | Bently Nevada (Baker Hughes) |
| Part Number | 16925-30 |
| Product Type | Proximity Probe Interconnect Cable |
| Cable Length | 30 ft (9.14 m) |
| Conductor | 18 AWG copper, 3 conductors |
| Shielding | Foil plus braided shield for EMI/RFI suppression |
| Voltage Rating | 300 V |
| Operating Temperature | -40°C ~ +85°C |
| Jacket Material | Industrial PVC |
| Minimum Bend Radius | 50 mm |
| Construction | Non-armored |
| Termination | 3-socket connector at one end, bare lugs at opposite end |
| Net Weight | Approx. 1.13 kg |
Key Features
- Purpose-built low-impedance signal cable for eddy current proximity probe systems
- Double shielding (foil + braid) rejects electromagnetic noise from power cabinets and variable speed drives
- Matched capacitance characteristics to preserve probe gap signal accuracy
- Robust molded connector for reliable field connection to Bently standard proximity probes
- Resistant to oil, moisture and common industrial contaminants in turbine compartments
- Available in multiple length variants within the 16925 family, the suffix -30 represents 30 feet
- Critical for accurate vibration and thrust position readings in machinery protection loops
Installation & Test Notes
- Route cable separately from high-voltage power cables to avoid induced electrical noise.
- Maintain minimum bend radius during installation; sharp bends alter cable capacitance and cause measurement drift.
- Ground the cable shield at one end only following TSI system wiring specifications to prevent ground loops.
- Inspect connector pins and lugs for damage, corrosion or dirt before wiring.
- Secure cable with cable ties, avoid crushing the outer jacket.
- After installation, perform gap calibration test with proximity probe to verify signal integrity.
- Check for signal noise and cable faults using 3500 rack diagnostic functions.
- Periodically inspect jacket for cracking or abrasion in high-temperature machine enclosures.
Application
Used in steam turbines, gas turbines, centrifugal compressors, large pumps and generators in power plants, oil & gas refineries and petrochemical plants. It delivers shaft vibration, axial thrust and rotor position signals to the Bently Nevada 3500 TSI machinery protection rack for online monitoring and protection trip logic.
FAQ
Q: What does -30 stand for in 16925-30? A: The suffix -30 means cable length of 30 feet. Other available options include different foot lengths in the same 16925 cable series.
Q: Is this cable armored? A: No, 16925-30 is non-armored. Use armored variant if routing through mechanical hazard areas.
Q: Why single-point shield grounding? A: Single end grounding eliminates ground loop currents, which create noise and error in the low-voltage eddy current probe measurement signal.
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