Introduction to the 3500/40 176449-01
The Bently Nevada 3500/40 176449-01 is a Vibration Monitor module for the 3500 Machinery Monitoring and Protection System. This module is a fundamental component designed to protect critical rotating machinery by continuously monitoring radial vibration. It accepts input from two proximity transducers to measure the relative displacement of a shaft relative to its bearing. The module processes this data to provide real-time vibration levels, which are used for both machinery protection (by initiating alarms and trips through relay modules) and condition monitoring. This specific part number represents a standard, dual-channel vibration monitor within the 3500 series.
Technical Parameters
The key technical specifications for the 3500/40 176449-01 Vibration Monitor are as follows:
| Parameter | Specification |
|---|---|
| Part Number | 3500/40 176449-01 |
| Description | Vibration Monitor (Dual Channel) |
| Channels | 2 independent monitoring channels |
| Input Type | Accepts signals from two proximity probes (typically -24 VDC powered). |
| Measured Parameter | Relative Shaft Vibration (peak-to-peak, in mils or microns) |
| Dynamic Signals | Provides buffered output of Raw Vibration and Gap Voltage for each channel. |
| Keyphasor® Input | 1 dedicated Keyphasor input per module for timing reference. |
| Alarm Settings | User-configurable Alert and Danger (Trip) setpoints for each channel. |
| 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 3500/40 monitor is universally applied in industries where protecting high-value rotating equipment from vibration-related failures is critical.
Turbo-machinery Protection:
Gas & Steam Turbines: Monitoring radial shaft vibration to protect against imbalance, misalignment, shaft bow, and other rotor dynamic issues.
Centrifugal & Axial Compressors: Monitoring vibration on critical compressors in LNG plants, refineries, and pipeline stations to prevent catastrophic rotor failures.
Power Generation:
Protecting large generators and their exciters by monitoring shaft vibration to detect issues like thermal imbalance and bearing problems.
Critical Pumps and Motors:
Monitoring high-energy pumps (e.g., boiler feed pumps) and large motors in various industrial plants to detect bearing wear, imbalance, and cavitation.
Hydroelectric Turbines:
Monitoring the shaft vibration of large hydro-turbine generator sets.
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