Bently Nevada 79482-01 Position Monitor

Quick Overview

The 79482-01 is a high-reliability Dual Thrust Position Monitor belonging to the legacy Bently Nevada 3300 Series machinery protection system. This module is specifically designed to monitor the axial position of a rotating shaft, providing an essential safety layer that prevents catastrophic internal contact between the rotor and stationary components. By utilizing two independent channels, the 79482-01 offers redundant protection logic for high-speed turbines, compressors, and large pumps. 

Technical Data

• Model Number: 79482-01

• Product Type: Dual Thrust Position Monitor

• Series: 3300 System

• Transducer Power: -24 VDC (Standard for Proximitor sensors)

• Input Signal Range: +10.0 V to -24.0 V

• Frequency Response: 0 Hz (DC) to 10 kHz

• Output Resistance (Recorder): 50 $\Omega$

• Output Impedance (Voltage): 100 $\Omega$

• Weight: 2.8 kg

• Dimensions: 33.0 x 20.3 x 5.7 cm

• Operating Temp: 0°C to +65°C

Key Features

• Critical Axial Protection: Continuously tracks the position of the thrust collar to ensure the rotor remains within its designed float zone, preventing metal-to-metal contact during operational surges.

• Dual-Channel Redundancy: Two independent monitoring channels allow for "voting" logic (e.g., 2-out-of-2), which significantly reduces the risk of nuisance trips while maintaining high system availability.

• Proactive Diagnostics: Beyond simple protection, the module provides analog outputs for trending, helping maintenance teams identify gradual thrust bearing wear or misalignment over time.

• High-Fidelity Signal Processing: Supports a frequency response up to 10 kHz, ensuring that even rapid axial transients are captured and processed for immediate alarm generation.

• Legacy System Compatibility: Designed for seamless integration into existing 3300 series racks, providing a straightforward path for maintaining and repairing established machinery protection installations.

• Robust Output Options: Features dedicated voltage and recorder outputs, allowing for simultaneous connection to local displays, DCS (Distributed Control Systems), and long-term data loggers.