Bently Nevada 3300/50-02-02-00-00 Zero Speed Tachometer Dual-channel Tachometer Monitor

Product Overview
The Bently Nevada 3300/50-02-02-00-00 is a dual-channel tachometer monitor in the GE Bently Nevada 3300 series. Designed for critical rotating machinery such as steam turbines, compressors, pumps, and fans, it provides real-time monitoring of rotational speed, zero speed, and rotor acceleration, and provides reliable overspeed, underspeed, and reverse rotation protection. This model is based on the 3300/50. The suffix "02-02-00-00" designates a factory-installed dual-channel configuration with standard signal processing, no special coatings, and no additional certifications. This ensures high field spare parts compatibility and simplified maintenance.

Core Features
• Dual-channel redundancy: Supports eddy current sensors or magnetoelectric sensors, and 2×2 voting logic reduces false tripping
• Wide measurement range: 0–99,999 RPM, resolution 0.1 RPM, acceleration 0–100,000 RPM/s
• Zero-speed detection: Configurable zero-speed alarm and shaft lock protection
• Reverse rotation monitoring: Real-time identification of rotor reversal direction and number (requires direction probe)
• Analog output: Dual 4–20 mA (speed/acceleration), ≤600 Ω load
• Relay output: Independent alarm and hazard contacts, 30 V DC / 5 A
• Field configuration: Range, delay, and logic settings are completed via the front panel or System 1 software
• Self-diagnostics: Continuously detects sensor shorts/open circuits and module faults, with event logging

Technical Specifications
Input power: 24 V DC ±10%, power consumption ≤5 W
Operating temperature: –30°C to +65°C; storage temperature –40°C to +85°C
Protection Rating: IP20 (DIN rail or 19" rack mount)
Electromagnetic Compatibility: IEC 61000-6-2 / 61000-6-4 industrial-grade immunity
Case Dimensions: Approximately 241 mm × 24 mm × 99 mm (H × W × D)
Weight: ≈ 0.45 kg

Compatible Sensors
• 3300 XL 8 mm eddy-current probe + extension cable + proximitor sensor
• 3300 XL 11 mm wide-gap probe
• Magnetoelectric speed sensor (MPU)

Typical Applications
• Gas/steam turbine startup, shutdown, and critical speed monitoring
• Compressor anti-surge and overspeed protection
• API 670 critical pump unit monitoring
• Offshore platforms, refineries, and LNG For use in explosion-hazardous areas such as receiving stations (with safety barriers)

Ordering Information
Complete Model Number: 3300/50-02-02-00-00
Replacement Part Number: 83630-01 (PCB Assembly)

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