Product Details:

Bently Nevada 72995-01 is a zero speed monitor card designed for Bently Nevada 3300 series turbine supervisory instrumentation system, which is a rack-mounted rotor stop detection module dedicated to monitoring low-speed and zero-speed conditions of rotating machinery. This speed monitor card receives pulse signals from keyphasor or magnetic pickup sensors installed on the rotating shaft, continuously tracks the rotational speed of steam turbines, compressors and generators. It is specially optimized for low speed measurement, and can accurately judge whether the rotor has completely stopped rotating, which is a critical safety parameter for equipment maintenance, lube oil system control and turning gear interlock protection. Users can set configurable zero-speed alarm thresholds. When the rotor speed drops below the preset threshold, the module will trigger relay alarm output and analog recording signals to external DCS and PLC interlock systems. This function prevents maintenance personnel from opening equipment casings or executing unsafe operations while the rotor is still rotating. The 72995-01 adopts industrial signal processing circuit design, with built-in noise filtering function to filter out electromagnetic interference and false pulse signals generated by mechanical vibration in power plant and petrochemical sites. Installed inside the 3300 instrument rack, it communicates with rear terminal modules to receive sensor pulse signals and output alarm contact signals. It operates stably within a specified working temperature range and supports long-term continuous monitoring. Widely used in power generation, petrochemical, metallurgy and chemical industries, this machinery speed monitor provides reliable rotor stop judgment for large rotating equipment. It helps plant operators confirm rotor stationary status before overhaul work, avoid accidental rotation related safety accidents, ensure the safety of maintenance operations, and support the interlock protection strategy of steam turbines, centrifugal compressors and generators.

Core Attributes:

Brand: Bently Nevada

Model: 72995-01

Product Type: Zero Speed Monitor Card

Compatible System: Bently Nevada 3300 series monitoring rack

Input Sensor: Keyphasor sensor, magnetic pickup sensor

Function: Low speed measurement, rotor zero-speed detection, configurable alarm threshold, relay contact output, analog recording output

Mounting: Rack slot installation

Feature: Precision low speed pulse processing, built-in signal noise filtering, safety interlock support, configurable zero speed alarm