Description
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | 3300/55-01-03-13-13-00-01-00 |
| Manufacturer | Bently Nevada |
| Product Type | Dual Velocity Monitor |
| Monitoring Channels | 2 |
| Transducer Input | Bell & Howell CEC 4-126 velocity transducers |
| Transducer Sensitivity | 145 mV/in/s |
| Channel A Full Scale | 0–50 mm/s peak velocity |
| Channel B Full Scale | 0–50 mm/s peak velocity |
| Measurement Units | Peak velocity |
| Agency Approval | Not required |
| Barriers | None |
| Alarm Relay | Epoxy-sealed dual relays |
| Trip Multiply | None |
| Mounting | 3300 rack plug-in module |
| Application | Continuous online machinery vibration monitoring |
The option code 03 identifies the Bell & Howell CEC 4-126 transducer type, while full-scale option 13 corresponds to 0–50 mm/s peak velocity for both channels. The documented ordering structure also identifies 00 for no agency approval and 00 for no barriers; the remaining suffix positions specify relay and trip-multiply options.
Product Introduction
The Bently Nevada 3300/55-01-03-13-13-00-01-00 is a two-channel Dual Velocity Monitor for continuous vibration measurement on rotating machinery. The 3300/55 accepts velocity-transducer signals and provides monitoring, alarm, relay, recorder, and buffered-transducer functions within the 3300 rack architecture. This particular configuration is specified for CEC 4-126 velocity transducers with 0–50 mm/s peak ranges on both channels.
The practical advantage is straightforward: it preserves an existing 3300 monitoring installation without requiring a wholesale machinery-protection architecture change. But this is a legacy instrument. The exact transducer type, scaling, relay arrangement, and field jumper configuration must be checked before substitution. The manufacturer maintenance documentation specifically warns that changing full-scale range requires recalibration.
3300/55-01-03-13-13-00-01-00
Application Scenarios & Field Pitfalls
Engineering Pain Point
A vibration monitor failure on an operating turbine, compressor, or large motor is rarely just an instrumentation inconvenience. If the monitor participates in machinery alarm or shutdown logic, removing it can leave the machine without the intended protection function. The 3300/55 maintenance documentation explicitly notes that the machine is not protected when the monitor is removed from the rack. For a replacement, the engineer needs the complete part number, not merely “3300/55.”
Typical Applications
- Power Generation — Bearing and casing vibration monitoring on turbine-generator auxiliary machinery.
- Petrochemical — Continuous vibration monitoring on pumps, compressors, and other rotating process equipment.
- Oil & Gas — Machinery protection where velocity measurements are used for bearing or housing vibration surveillance.
- Industrial Manufacturing — Monitoring motors, fans, pumps, and rotating equipment within an existing 3300 rack.
Technical Pitfalls to Avoid
- Do not substitute by family number alone.
A 3300/55 can be ordered with different transducer types, measurement units, full-scale ranges, relay arrangements, barriers, and trip-multiply options. Two modules marked 3300/55 may therefore have materially different configurations. - Verify the transducer before installation.
This part number specifies the CEC 4-126 transducer type. The 3300/55 also supports other transducer configurations, including Bently Nevada 9200/74712, 47633/86205, Velomitor, and HTVS options. The input characteristics are not interchangeable simply because the monitor family is the same. - Do not change the 50 mm/s range without recalibration.
The documentation states that changing a full-scale range requires monitor recalibration. A field jumper change is not equivalent to a validated calibration change. - Check the relay configuration and shutdown logic.
This configuration uses epoxy-sealed dual relays. Confirm whether the existing plant logic expects normally energized or normally de-energized behavior and verify the actual jumper configuration against the machine-protection drawings before returning the equipment to service.
Related Products
- Bently Nevada 3300/55 — Same Dual Velocity Monitor family. The base family supports two continuous vibration channels, but the actual configuration depends on the option code. It is useful when identifying compatible legacy monitor positions.
- Bently Nevada 3300/16 — XY/GAP Dual Vibration Monitor. Designed for proximity-probe-based shaft vibration and position measurements rather than the velocity-transducer input used by this 3300/55 configuration.
- Bently Nevada 3300/15 — Dual Vibration Monitor for another 3300-series vibration-monitoring application. It should not be treated as a functional replacement for a velocity-input 3300/55 without checking the complete measurement architecture.
- Bently Nevada 3300/20 — Dual Thrust Position Monitor. Intended for axial shaft-position monitoring, making it complementary to radial vibration monitoring on machinery where both parameters are required.
- Bently Nevada 3300/25 — Dual Acceleration Monitor. Used where acceleration measurements are required rather than the velocity measurement provided by the 3300/55.
- Bently Nevada 3300/26 — Dual Acceleration RMS Monitor. Provides RMS acceleration monitoring within the same broader 3300 machinery-monitoring platform.
- Bently Nevada 3300/40 — Eccentricity Monitor. Intended for shaft eccentricity measurements and therefore addresses a different machine condition from the 3300/55 velocity channels.
- Bently Nevada 3300/61 — Dual Vector Monitor. Provides vector-related machinery measurements and belongs to the same 3300 system family, but its measurement function differs from the dual velocity configuration.
- Bently Nevada 3300/65 — Dual Probe Monitor. Used for dual-probe monitoring applications and should be evaluated separately from velocity-transducer-based monitoring.
- Bently Nevada 3300/05 — 3300 system rack. It houses the individual 3300 monitoring modules, making rack compatibility and slot configuration relevant when replacing a 3300/55.
