Introduction to the 3500/32-01-00 125720-01
The Bently Nevada 3500/32-01-00 125720-01 is a Radial Vibration Monitor module for the 3500 Machinery Monitoring and Protection System. This module is specifically engineered to monitor the relative shaft vibration of rotating machinery using non-contact proximity probe systems. It processes the signals from two proximity probes (typically mounted 90 degrees apart on a bearing) to provide precise measurement of shaft vibration amplitude and phase. This data is crucial for detecting machinery faults such as imbalance, misalignment, and oil whirl, allowing for both early warning (Alert) and immediate protective action (Danger/Trip) to prevent catastrophic damage.
Technical Parameters
The key technical specifications for the 3500/32-01-00 Radial Vibration Monitor are as follows:
| Parameter | Specification |
|---|---|
| Part Number | 3500/32-01-00 125720-01 |
| Description | Radial Vibration Monitor (Dual Channel) |
| Channels | 2 independent monitoring channels (for X and Y probes) |
| Input Type | Accepts signals from two proximity probes (typically -24 VDC powered). |
| Measured Parameter | Relative Shaft Vibration (amplitude and phase) |
| Dynamic Signals | Provides buffered output of Raw Vibration, Gap Voltage, and 1X Filtered Vibration for each channel. |
| Keyphasor® Input | 1 dedicated Keyphasor input per module for phase reference. |
| Alarm Settings | User-configurable Alert and Danger (Trip) setpoints for amplitude. |
| Power Supply | Powered by the 3500 rack backplane. |
| Dimensions (H x W x D) | Approx. 70 mm x 213 mm x 200 mm (Occupies one slot in a standard 3500 rack frame) |
| Weight | Approx. 1.5 kg (3.3 lbs) |
| Mounting | Installs in any compatible slot (except the two left-most power supply slots) of a 3500 rack frame. |
| Communication | Configures and communicates via the 3500 rack framework. |
| Operating Temperature | 0°C to +65°C (32°F to +149°F) |
| Compatibility | Fully compatible with other 3500 series modules and supported by System 1® software. |
Application Scenarios
The 3500/32 monitor is a cornerstone for protecting high-speed rotating equipment where precise measurement of shaft motion relative to the bearings is essential.
Turbo-machinery Protection:
Gas & Steam Turbines: Continuously monitoring radial vibration to protect against imbalance, misalignment, shaft bow, and other rotor dynamic instabilities. The ability to measure phase is critical for field balancing.
Centrifugal & Axial Compressors: Protecting critical compressors in LNG plants, refineries, and pipeline stations by detecting early signs of rotor instability, such as oil whirl/whip.
Power Generation:
Monitoring large generators and hydrogen coolers for vibration issues that could lead to stator-rub or other damage.
High-Speed Pumps and Motors:
Protecting high-energy multi-stage pumps and large motors by monitoring shaft vibration to detect bearing wear, imbalance, and other mechanical faults.
Turbo-expanders:
Safeguarding high-speed turbo-expanders used in process industries for efficiency and power recovery.
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7×24 hours technical consultation, from selection guidance to installation and commissioning to provide full life cycle service (paid)
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