Bently Nevada 330500-04-00 Overspeed Detection System

Bently Nevada 330500 Overspeed Detection System

Critical machinery protection system engineered to prevent catastrophic overspeed events in rotating equipment. The Bently Nevada 330500-04-00 provides independent, fail-safe overspeed monitoring with triple-redundant sensing and voting logic for turbines, compressors, and high-speed machinery.

🛡️ System Overview

Model Number: 330500-04-00
System Type: Overspeed Detection and Protection
Product Family: 330500 Series Safety Systems
Sensing Method: Magnetic pickup or proximity probe
Trip Logic: 2-out-of-3 voting (2oo3) architecture
Speed Range: Configurable from 100 to 20,000 RPM
Accuracy: ±0.5% of setpoint
Response Time: Less than 10 milliseconds
Relay Outputs: Triple redundant SPDT contacts
Power Supply: 24 VDC or 115/230 VAC options
Operating Temp: -40°C to +70°C
Certification: SIL 3, API 670, IEC 61508, TÜV approved

⚡ Triple Redundancy Architecture

Overspeed protection cannot fail. The 330500 system employs three independent speed sensors feeding three separate processing channels. Each channel continuously calculates shaft speed and compares it against the configured trip setpoint. When two of the three channels detect overspeed conditions (2oo3 voting logic), the system initiates emergency shutdown.

This architecture provides both reliability and availability—a single sensor or channel failure does not cause false trips, yet the system maintains full protection capability. Self-diagnostics continuously monitor channel health, alerting operators to degraded conditions while maintaining protective function.

🎯 Critical Protection Applications

Steam Turbine Overspeed: Prevents turbine destruction during governor failures or load rejection events. The 330500 provides the last line of defense, triggering emergency steam valve closure when speed exceeds 110% of rated RPM—typically within 10 milliseconds of detecting the overspeed condition.

Gas Turbine Protection: Monitors turbine speed independently of the control system. During fuel system malfunctions or control failures, the 330500 initiates fuel shutoff and starter motor engagement to prevent compressor surge and turbine blade failure.

Centrifugal Compressor Safety: Detects runaway conditions caused by process upsets or anti-surge system failures. Rapid trip response prevents bearing failures, seal damage, and catastrophic rotor disintegration that occur within seconds of overspeed onset.

🔧 Advanced Safety Features

✓ 2oo3 Voting Logic: Eliminates single-point failures and false trips
✓ Self-Diagnostics: Continuous channel health monitoring with alarm outputs
✓ Speed Tracking Display: Real-time RPM indication on front panel
✓ Test Capability: Verify system function without machine shutdown
✓ Adjustable Setpoints: Field-configurable trip speeds with password protection
✓ Event Recording: Captures trip events with timestamp and speed data

💼 Regulatory Compliance

The 330500 system meets stringent safety integrity requirements for machinery protection applications. SIL 3 certification per IEC 61508 ensures the system achieves probability of failure on demand (PFD) below 0.001—meaning less than one dangerous failure per 1,000 demands. This level of reliability is essential for protecting personnel, equipment, and facilities from overspeed hazards.

API 670 compliance ensures the system meets petroleum and chemical industry standards for machinery protection systems. TÜV certification provides independent verification of safety function performance and reliability calculations.

🔌 Installation and Integration

The 330500 accepts inputs from magnetic pickups, proximity probes, or active speed sensors. Three sensors must be installed around the shaft circumference at 120-degree spacing to ensure redundant measurement. The system's relay outputs connect directly to emergency shutdown valves, circuit breakers, or other final control elements.

Panel-mount or rack-mount configurations available. Front-panel controls allow authorized personnel to adjust setpoints, view current speed, and perform functional tests. Communication options enable integration with DCS and SCADA systems for remote monitoring and event logging.

📦 Complete Safety Package

One 330500-04-00 overspeed detection system, mounting hardware, terminal blocks, three speed sensor inputs (sensors sold separately), relay output connections, configuration software, installation manual, safety validation documentation, and SIL 3 certification package.

Product Status: Brand new, factory-sealed with full manufacturer warranty, global technical support, and access to Bently Nevada's safety system engineering team.