Why use a Megger instead of a Multimeter for insulation?
To safeguard essential machinery (like steering gear) by automatically disconnecting non-essential services (like AC or galley power) during a partial overload.
Accept the alarm and isolate breakers one by one to locate the source. Common causes include damaged conductor insulation, dampness, or accumulated dirt. What tasks are performed? Meo Class 4 Electrical Oral Questions And Answers
Verify connections, check if the breaker has tripped (reset if so), ensure supply from the Main Switchboard (MSB), and check for single-phasing.
What safety measures are mandatory?
Ensure the coupling isn't misaligned and the pump isn't obstructed. Earth Fault Alarms: What is your immediate action?
What are the typical trip values? Under-voltage: 30–50% of load. Reverse Power: Approximately 10% of load. Over-current: 150% of Full Load Current (FLC). Maintenance & Troubleshooting Why use a Megger instead of a Multimeter for insulation
Synchroscope, Dark Lamp method, and Bright Lamp method.