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Machinery Protection Against Overspeed Conditions
The Bently Nevada 3300/53-03-02-00-30-20-00-00-00 overspeed detection module provides critical protection for rotating machinery. This module accepts input signals from proximity probes or magnetic pickups for precise speed measurement. The system detects overspeed events and initiates protective actions to prevent catastrophic equipment failure. It meets the rigorous API 670 standard for machinery protection applications .
Complete Technical Specifications
| Parameter | Specification |
|---|---|
| Model Number | 3300/53-03-02-00-30-20-00-00-00 |
| Brand | Bently Nevada |
| Category | Overspeed Detection Module |
| Input Signal | Proximity probe or magnetic pickup |
| Input Range | +10.0 V to -24.0 V |
| Operating Speed Range | 100 RPM to 10,000 RPM |
| Measurement Accuracy | ±0.1% of full scale |
| Relay Output Rating | 4 Amps @ 24 Vdc resistive |
| Relay Configuration | 2-out-of-2 or 2-out-of-3 voting |
| Power Consumption | 8.0 W typical |
| Input Impedance | 20 kΩ maximum |
| Operating Temperature | -30°C to +65°C |
| Storage Temperature | -40°C to +85°C |
| Dimensions (HxWxD) | 241.3 x 24.4 x 241.9 mm |
| Weight | 0.82 kg |
| Agency Approvals | CSA, BASEEFA options available |
| Country of Origin | USA |
Advanced Overspeed Detection Capabilities
The module processes speed signals with exceptional precision and reliability. Its ±0.1% full-scale accuracy ensures you receive trustworthy speed data for critical decisions . The system supports 2-out-of-2 or 2-out-of-3 voting configurations, thereby enhancing overall fault tolerance . This voting logic significantly reduces the risk of nuisance trips while maintaining robust protection.
Input Signal Processing
The module accepts both proximity probe and magnetic pickup inputs without requiring additional conditioning. Its wide input range accommodates various sensor types commonly found in industrial installations. The input impedance of 20 kΩ ensures minimal loading on the sensor circuit. Consequently, this design maintains signal integrity over extended cable runs.
Relay Output and System Integration
The onboard relays provide dependable switching for alarm and trip circuits. Each relay handles 4 Amps at 24 Vdc for resistive loads. You can configure the outputs for both alarm annunciation and automatic shutdown functions . The module integrates seamlessly with 3300 series racks or operates as a standalone protection device . This versatility simplifies both new installations and retrofit projects.
Environmental Resilience
This module withstands harsh industrial conditions without performance degradation. Its wide operating temperature range from -30°C to +65°C suits most plant environments. The robust construction ensures reliable operation in areas with significant vibration and temperature fluctuations. Additionally, the compact 241.3 mm height and 24.4 mm width facilitate installation in crowded panels.
Application Suitability
This overspeed detection system suits steam turbines, gas turbines, compressors, and generators. Its API 670 compliance makes it the preferred choice for critical machinery protection . Operators in power generation, oil and gas, and manufacturing facilities rely on this module for continuous speed surveillance. The system’s proven reliability reduces unplanned downtime and extends equipment service life.