Bently Nevada 133388-02

Product Overview

133388-02 is a 3500/50 tachometer module launched by Bently Nevada, a subsidiary of Baker Hughes. 133388-02 is a key component in the 3500 condition monitoring and mechanical protection system, specifically designed for high-precision speed measurement, overspeed protection, zero speed detection, reverse alarm, and rotor acceleration monitoring of rotating equipment.

This module adopts a single-width design and can be directly inserted into a standard 3500 rack. The tachometer module can receive signals from up to two independent channels of tachometer sensors. Through advanced digital signal processing technology, it calculates the precise speed value and, based on the alarm logic set by the user, drives the relay output to trigger the protection interlock. Meanwhile, the tachometer module also provides a 4-20mA analog output, seamlessly integrating real-time rotational speed data into the factory's DCS or SCADA system to achieve centralized monitoring. 133388-02 is the cornerstone for ensuring the safe, reliable and efficient operation of critical rotating assets.

Product functional features

Multi-dimensional machine state perception

Basic speed monitoring provides high-precision and wide-range real-time speed readings.

Overspeed Protection can be set with two independent levels of alarms for early warning and dangerous shutdown. The time delay is programmable to prevent accidental tripping.

Zero-speed detection can accurately determine whether the machine has completely stopped, which is crucial for turning the wheel and start-stop logic.

Reverse detection can identify and alarm the reverse rotation of the shaft, protecting the equipment from damage caused by abnormal working conditions.

Rotor Acceleration alarm monitors the rate of change in rotational speed and can be used to detect transient faults such as surge and stall.

Flexible signal processing and adaptability

Double-threshold trigger mode

Under the automatic threshold, the 133388-02 module automatically adjusts the trigger level, making it suitable for applications where the signal amplitude is stable.

Under the Manual Threshold, users can precisely set the trigger level within the range of + 9.5Vdc to -23.5Vdc, and can also set the hysteresis from 0.2 to 2.5V, effectively suppressing false triggering caused by signal jitter. It is particularly suitable for old units with poor signal quality.

The extensive sensor compatibility simultaneously supports eddy current probes that require external power supply and self-powered magnetoelectric pickups, adapting to various application scenarios.

Strong system integration and diagnostic capabilities

The 4-20mA standard output outputs key parameters such as rotational speed and acceleration as industrial standard signals, facilitating integration with upper-level systems.

The front panel buffer output provides high-quality raw sensor signals, facilitating on-site engineers to use portable data collectors for fault diagnosis and spectrum analysis.

The three front panel leds of 133388-02 provide maintenance personnel with intuitive information on the health status, communication status and operation mode of the modules, greatly simplifying daily inspections and troubleshooting.

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