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      3300/50-02-02-00-00

      Zero Speed Tachometer
      Ships by Friday, November 6
      Product image is representative; revision or series may vary. Contact us to request a specific version.

      Product Describe：

      Bently Nevada 3300/50-02-02-00-00 is a 3300 zero-speed tachometer with two transducer inputs and hermetically sealed alarm relays for speed annunciation.
      • Manufacturer part number
        3300/50-02-02-00-00
      • Shipping
        Swift global dispatch
      • Condition
        New, original product
      • Shipping size (est.)
        5.1cm x 32cm x 20.4cm
      • Country of Origin
        USA

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      What happens after you enquire

      • 0

        Review your reference

        Send the complete 3300/50-02-02-00-00 marking, quantity and label photos so the application configuration can be checked.

      • 1

        Confirm the offer

        Review the quoted condition, included items and expected dispatch date. Confirm the rear zero-speed relay/input module, terminal accessories and any transducer systems separately in the quotation.

      • 2

        Arrange dispatch

        Confirm delivery details and receive the tracking reference when the shipment is arranged.

      • Match the complete marking

        Include 3300/50-02-02-00-00 and any revision or assembly number visible on the item. Keep the exact reference on your enquiry and quotation.

      • Check the offered item before ordering

        Request available label and connector photos. Have your maintenance team compare the offered 3300/50-02-02-00-00 with the installed equipment and applicable Bently Nevada documentation.

      Technical specifications for 3300/50-02-02-00-00

      • Manufacturer:
        Bently Nevada
      • Product Category:
        Machinery Monitoring Systems
      • Spare Part Number:
        3300/50-02-02-00-00
      • Weight:
        1.08 kg
      • Tariff Code:
        8537101190
      • Tachometer type:
        02 — Zero speed
      • Alert relay option:
        02 — Hermetically sealed
      • Agency approval option:
        00 — Not required
      • Safety barrier option:
        00 — None
      • Transducer inputs:
        Two proximity or magnetic-pickup signals; magnetic pickups not recommended for zero speed
      • Zero-speed alert range:
        Selectable below 100 rpm
      • Signal input impedance:
        10 kilohms
      • Nominal power consumption:
        2.5 W
      • Manual trigger threshold:
        0 to -18 Vdc
      • Trigger hysteresis:
        Selectable 0.2–2.0 V
      • Recorder formats:
        4–20 mA; 1–5 Vdc; 0 to -10 Vdc
      • Operating temperature:
        0 to +65°C
      • Application limitation:
        Not for speed control or overspeed protection
      View as PDF Ask for Quote

      Information

      Overview Downloads Applications / Compatibility Product Precautions
      • Bently Nevada 3300/50-02-02-00-00 adds low-speed and stopped-shaft annunciation to an existing 3300 rack, using validated transducer pulses to determine the measured speed.
      Tachometer configuration: Zero-speed option 02
      Relay construction: Hermetically sealed
      Input architecture: Two transducer signals with internal voting
      Use boundary: Annunciation and recording
      Although it produces a single speed measurement, the monitor accepts two transducer signals and applies internal voting to reduce false indications when one transducer fails. Supported input families include Bently Nevada 3300, 7200 and 3000 proximity systems and magnetic pickups; magnetic pickups are specifically not recommended for zero-speed monitoring.

      Zero Speed Alert can be selected at a speed below 100 rpm. Detection uses three valid input triggers; when these are absent at standstill, up to one minute is required to declare the alarm. One valid pulse after power-up is required to enable alarm detection. These timing conditions must be included in the annunciator commissioning test.

      Manual trigger threshold is adjustable from 0 to -18 Vdc and hysteresis from 0.2 to 2.0 V. Recorder format can be selected as 4–20 mA, 1–5 Vdc or 0 to -10 Vdc. The hermetically sealed relay option does not change the application boundary: the tachometer must not be used independently or as part of a speed-control or overspeed-protection system.
      Controller platform reference: Bently Nevada 3300 zero-speed monitoring.
      Technical downloads for Bently Nevada 3300/50-02-02-00-00: an Apter Power technical reference and an installation and commissioning guide.
      Both guides are compiled by Apter Power from applicable manufacturer material for preparation and review. Use the complete manufacturer and machine instructions during installation and commissioning.
      Rack and signal context: 3300/50-02-02-00-00 uses two transducer inputs in a single-measurement 3300 tachometer arrangement. Match the zero-speed rear module and hermetically sealed relay option to the installed circuit.

      Application boundary: Use the outputs for low-speed annunciation and recording. Provide a separate suitable system for speed control or machine overspeed protection.
      Commission 3300/50-02-02-00-00 as a zero-speed annunciation instrument; it does not provide overspeed protection.
      Preserve the zero-speed type

      Retain option 02 and the matching zero-speed rear module.

      Choose suitable transducers

      Magnetic pickups are not recommended for zero-speed monitoring.

      Include power-up qualification

      Alarm detection requires one valid input pulse after power-up.

      Allow the specified delay

      At standstill, absence of three valid triggers can require up to one minute to declare an alarm.

      Set the trigger correctly

      Match manual threshold, hysteresis and events per revolution to the actual signal.

      Keep protection independent

      Do not use this tachometer for speed control or overspeed protection.

      Alternative Names

      3300/50-02-02-00-00 3300-50-02-02-00-00 Bently Nevada 3300/50-02-02-00-00 Bently Nevada 3300-50-02-02-00-00

      Technical notes

      Zero-speed relationship: Magnetic pickups are not recommended for zero-speed monitoring. The zero-speed alert is adjustable below 100 rpm and requires one valid input pulse after power-up before alarm detection is enabled.

      Application limitation: This tachometer is not a speed-control or overspeed-protection device. Speed alerts are for annunciation and proportional outputs are for data logging or chart recording.

      Technical reference: Bently Nevada 3300/50 Tachometer Specifications and Ordering Information, 141512-01 Rev. H. The complete 02/02/00/00 option string identifies the zero-speed and relay configuration.

      FAQ View All FAQ

      • What does option 02 specify in 3300/50-02-02-00-00?
        The first 02 selects the Zero Speed Tachometer type. The second 02 specifies hermetically sealed alert relays; the following 00/00 options mean no requested agency approval and no safety barriers.
      • At what speed can the zero-speed alert on 3300/50-02-02-00-00 be set?
        The zero-speed alert can be selected and changed at a speed below 100 rpm. Use the intended threshold and verify it with controlled pulses representing the installed transducer and events-per-revolution configuration.
      • Why are magnetic pickups discouraged for 3300/50-02-02-00-00 zero-speed monitoring?
        The manufacturer does not recommend magnetic pickups for the zero-speed function. Select an appropriate supported proximity-transducer arrangement for this application and prove valid triggering at the required low speed.
      • How long can 3300/50-02-02-00-00 take to declare a standstill alarm?
        Zero-speed detection uses three valid input triggers. If three triggers are not detected with the rotor stopped, up to one minute is required to declare an alarm. One valid pulse after power-up is necessary to enable alarm detection.
      • Can 3300/50-02-02-00-00 act as an overspeed trip device?
        No. It lacks the protective redundancy and response speed required for speed control or overspeed protection. Speed alerts are for annunciation; its proportional output is for data logging or chart recording.
      • How are the two transducer inputs used by 3300/50-02-02-00-00?
        Two input signals feed a single speed measurement. Internal voting between the transducers reduces false indications when one transducer fails; this does not provide overspeed-protection redundancy.
      • Which trigger settings can be adjusted on 3300/50-02-02-00-00?
        Manual threshold is selectable from 0 to -18 Vdc and triggering hysteresis from 0.2 to 2.0 V. Auto threshold applies above 10 Hz up to 10 kHz, so the low-speed signal must be evaluated against the appropriate trigger configuration.
      • How should the recorder load be selected for 3300/50-02-02-00-00?
        The 4–20 mA output supports 0–600 ohms with 0 to +12 Vdc compliance. A voltage recorder requires at least 10 kilohms; its output impedance is 100 ohms. Match the input type and scaling to the configured recorder signal.
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