Description
Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | 3300/50-01-01-00-00 |
| Manufacturer | Bently Nevada (Baker Hughes) |
| Product Type | Tachometer Monitor / Speed and Acceleration Monitor |
| Series / Platform | Bently Nevada 3300 Series Machinery Protection System |
| Configuration | Dual Setpoint Tachometer (Option A = 01) |
| Measurement Parameters | Shaft rotative speed, rotative acceleration, zero-speed indication |
| Input Channels | Single channel monitor accepting inputs from two transducers with internal voting logic |
| Compatible Transducers | 3300, 7200 and 3000 Series Proximitor probes, magnetic pickups, TTL sources, eddy-current proximity probes |
| Input Signal Range | 0.5 V to 50 V peak-to-peak; manual threshold user-selectable 0 to -18 V DC |
| Auto Threshold Range | 10 Hz (600 rpm at 1 event per revolution) to 10 kHz |
| Frequency Range | 0 to 10 kHz |
| Hysteresis | User-selectable from 0.2 to 2.0 V |
| Alarm Setpoints | Two (dual setpoint), user configurable for overspeed, underspeed or acceleration |
| Relay Output | Epoxy-sealed, hermetically sealed Alert relay contacts (Option B = 01); 5 A contact capacity |
| Analog Output | Proportional voltage or current output on rear terminal strip, proportional to full-scale range |
| Agency Approval | None (Option C = 00) |
| Safety Barrier | None (Option D = 00) |
| Front Panel Indication | OK, Alert and Bypass LED indicators |
| Transducer Voting | Internal voting logic between two transducers to minimise false indications on single transducer failure |
| Power Consumption | 2.5 W nominal, powered from the 3300 rack |
| Power Supply | Powered by the 3300 rack system (typical -24 V DC transducer supply environment) |
| Operating Temperature | -30 °C to +65 °C (typical 3300 Series module rating) |
| Storage Temperature | -40 °C to +85 °C |
| Relative Humidity | Up to 95%, non-condensing |
| Dimensions (H × W × D) | Approximately 5.1 cm × 20.3 cm × 33.0 cm (module form factor for 3300 rack) |
| Weight | Approximately 1.5 kg |
| Mounting | Plug-in module for Bently Nevada 3300 Series rack |
| Certifications | CE, UL (as applicable to the 3300 Series platform) |
Main Features and Advantages
Dual setpoint speed and acceleration supervision: The defining capability of the 3300/50-01-01-00-00 is its dual setpoint architecture, which allows two independent alarm thresholds to be configured from a single speed channel. In practice this means an overspeed trip setpoint and an underspeed or zero-speed alarm can be supervised simultaneously, or an acceleration setpoint can be added to detect a run-up that is too fast for the machine’s thermal or mechanical limits. Because the module also measures rotative acceleration continuously, it can flag abnormal start-up and coast-down behaviour that a pure speed threshold would miss entirely, giving operators warning of problems during the transient conditions when machinery is most vulnerable.
Dual transducer input with internal voting logic: Although the 3300/50-01-01-00-00 is a single-channel monitor, it accepts signals from two transducers and resolves them through internal voting logic. This is a meaningful reliability feature rather than a specification curiosity: if one proximity probe, its extension cable or its Proximitor fails, the monitor continues to provide a valid speed reading from the surviving transducer instead of generating a false trip or a dangerous loss of indication. For machinery protection, where a spurious trip costs production and a missed trip costs the machine, this voting architecture directly addresses both failure directions.
Hermetically sealed alert relay for harsh service: Option B “01” on the 3300/50-01-01-00-00 specifies an epoxy-sealed, hermetically sealed alert relay. Sealed relays resist the moisture ingress, chemical attack and contact oxidation that cause conventional relays to fail intermittently in humid, coastal, chemically aggressive or dusty environments. Since the relay contacts are what actually drive the annunciator or shutdown circuit, relay reliability is the difference between a protection system that works when called upon and one that fails silently, which is why sealed relays are specified on critical machinery.
Flexible transducer compatibility and simple integration: The 3300/50-01-01-00-00 works with 3300, 7200 and 3000 Series Proximitor probes, magnetic pickups and TTL sources, with an auto threshold range extending from 10 Hz up to 10 kHz and user-selectable hysteresis between 0.2 and 2.0 V. This means one module serves everything from slow-turning gear and kiln drives to high-speed turbine and compressor shafts, and it can be retrofitted into existing installations without replacing the installed transducer hardware. The proportional voltage or current output on the rear terminal strip feeds speed directly to a DCS, PLC, recorder or vibration analyser, while OK, Alert and Bypass LEDs give local technicians immediate status without a laptop.
