Description
BENTLY 85515-02 Turbine Overspeed Protection Module
1. Product Description
The BENTLY 85515-02 is a high-reliability overspeed protection module designed for critical rotating machinery, such as gas turbines and compressors. As part of the BENTLY 3500 modular monitoring system, it provides real-time speed measurement, alarm triggering, and shutdown capabilities to prevent catastrophic overspeed events. The module supports dual-channel inputs for redundancy, hot-swap functionality for maintenance flexibility, and integrates seamlessly with BENTLY’s System 1 software for advanced condition analysis. Its compact design and rugged construction make it suitable for harsh industrial environments, ensuring continuous operation in power generation, oil & gas, and manufacturing sectors.
The BENTLY 85515-02 is a high-reliability overspeed protection module designed for critical rotating machinery, such as gas turbines and compressors. As part of the BENTLY 3500 modular monitoring system, it provides real-time speed measurement, alarm triggering, and shutdown capabilities to prevent catastrophic overspeed events. The module supports dual-channel inputs for redundancy, hot-swap functionality for maintenance flexibility, and integrates seamlessly with BENTLY’s System 1 software for advanced condition analysis. Its compact design and rugged construction make it suitable for harsh industrial environments, ensuring continuous operation in power generation, oil & gas, and manufacturing sectors.
2. Technical Parameters
| Parameter | Specification |
|---|---|
| Input Voltage | 24 VDC ±10% (for module operation) |
| Power Supply | 20–34 VDC or 90–140 VDC (external input) |
| Channels | Dual-channel (A and B) for redundant protection |
| Speed Range | 0–100,000 RPM (configurable) |
| Alarm Outputs | 4 solid-state relays (2 per channel) |
| Communication | Modbus RTU (RS-485) for integration with PLC/DCS |
| Operating Temperature | -40°C to +70°C |
| Compatibility | BENTLY 3500 racks, System 1 software |
BENTLY 85515-02
3. Advantages and Features
- Dual-Channel Redundancy: Ensures fail-safe operation by comparing two independent speed signals.
- Hot-Swap Capability: Allows replacement without system downtime, reducing maintenance costs.
- Precision Speed Monitoring: Uses advanced algorithms to detect overspeed within milliseconds.
- Customizable Alarms: Configurable setpoints for pre-trip warnings and emergency shutdowns.
- Wide Voltage Range: Supports both low and high DC input voltages for versatile applications.
4. Application Fields and Case Studies
- Energy: Protecting gas turbines in power plants during load fluctuations.
- Oil & Gas: Monitoring compressor trains in offshore platforms.
- Manufacturing: Preventing overspeed in high-speed rotating equipment.
Case Study: A petrochemical plant avoided $2M in potential damages by deploying the 85515-02 to trigger emergency shutdowns during unexpected speed surges in their centrifugal compressors.
BENTLY 85515-02
5. Competitor Comparison
The 85515-02 outperforms alternatives with:
The 85515-02 outperforms alternatives with:
- Built-in redundancy for SIL 2 compliance, reducing the need for external safety modules.
- Faster response time (≤10 ms) compared to legacy overspeed systems.
- Compatibility with BENTLY’s comprehensive System 1 analytics suite for predictive maintenance.
6. Selection Recommendations
- System Integration: Pair with BENTLY 3500 racks for unified machinery health monitoring.
- Safety Requirements: Choose the dual-channel version for applications requiring SIL 2 certification.
- Expansion Needs: Ensure rack space for future additions like vibration or temperature modules.
7. Precautions
- Power Stability: Use a filtered power supply to avoid voltage spikes.
- Sensor Calibration: Verify proximity probe alignment and signal integrity before commissioning.
- Firmware Updates: Regularly update to access new features and security patches.
