CONDITION : USED BUT TESTED AND WORKING FINE !

Key Features & Functions

1. Purpose:

   • Monitors engine RPM (revolutions per minute) in real time.

   • Triggers an emergency shutdown if RPM exceeds a preset limit (typically ~10-15% above rated speed).

2. Operation:

   • Uses magnetic or optical sensors to detect flywheel gear teeth or engine shaft rotation.

   • Often integrated with the engine safety system (ESS) or governor control.

3. Alarm & Shutdown:

   • Visual/Audible Alarm: Warns operators before shutdown.

   • Automatic Fuel Cut-off: Activates if overspeed persists (solenoid valve trips fuel rack).

4. Installation:

   • Typically mounted near the engine flywheel or camshaft.

   • Wired to the engine control panel and safety system.

Common Models & Compatibility

• MAN B&W OEM Models: Often labeled per engine type (e.g., S50MC overspeed trip device).

• Third-Party Alternatives: Brands like Woodward, Maretron, or Kongsberg may supply compatible systems.

Troubleshooting & Calibration

• False Tripping? Check sensor alignment, wiring, or electrical noise.

• No Response? Verify power supply, sensor gap, and relay functionality.

• Calibration: Must match engine’s rated RPM (set per MAN B&W specs).