Description

The Bently Nevada 3300/12-02-20-00, also cataloged as the 3300/12 AC Power Supply Module, operates as a dedicated hardware component for direct physical/electrical execution within 3300 Monitoring System platforms.

Suffix Breakdown & Model Matrix

• 02: 220 VAC nominal input voltage configuration option
• 20: Expanded output capacity power supply configuration option
• 00: Factory standard agency approval option

Hardware Specifications

Machinery Monitoring and TSI Characteristics

The internal conversion loops provide highly regulated DC output lines to drive the eddy-current probe scaling functions executed across all installed monitor cards. By maintaining linear supply rails, the hardware prevents fluctuations that could compromise field gap voltage validation (-10 VDC targets), ensuring the integrity of the proximity transducer calibration. This regulation keeps signal paths clear during severe supply voltage transients. Additionally, the unit incorporates heavy internal cross-talk suppression filters that isolate the primary switching noise from the backplane instrumentation bus, which maintains the clean data environments necessary to analyze high-frequency rotor dynamics.

Frequently Asked Questions

Q: Can this power supply module be paired with another 3300/12 card in the same rack for full power redundancy?

A: No. The standard 3300/05 system rack framework accommodates only a single power supply module slot located on the left side of the chassis, meaning the rack relies on a single power supply configuration.

Q: What indicates that the internal fuse has blown or that input power has dropped below the threshold?

A: The front panel OK LED will extinguish immediately. Concurrently, the internal power monitor circuit drops the common backplane OK line, which alerts all installed monitoring modules to inhibit their respective Danger relay outputs and prevent false machinery trips.

Field Installation Guidelines

• Disconnect the primary AC mains supply before terminating inputs at the rear terminal strip to prevent hazardous physical contact.
• Route all AC mains power feeds through a separate conduit away from low-level sensor and recorder output wires to eliminate 50/60 Hz electromagnetic induction.
• Terminate the dedicated AC earth ground conductor directly to the chassis ground stud on the backplane assembly to maintain safety grounding compliance.