Assessment OICEW-3-1D

Measure insulation resistance

Assessed in EN-4231 Sea Term IV: Marine Engineering

Condition

Aboard ship or in a workshop, given access to 3-phase electrical AC motor and controller, a Megger test meter, and other proper tools and safety equipment.

Performance Requirements

Behavior	Standard
The student will:	During assessment, the student shall, at a minimum:
Measure motor insulation resistance at motor controller	Use megger to perform insulation spot test: de-energize motor, lockout/tagout if necessary verify megger ground connection connect lead to field winding energize meter read meter
Correct insulation resistance measurement to standard temperature.	Correct reading to 40 °C using nomograph or correction chart.
Evaluate insulation resistance value	Compare corrected resistance to IEEE standard. State whether resistance value is within acceptable limits

Supports Table A-III/1 officers in charge of an engineering watch

Competence	Knowledge, Understanding & Proficiency	Task
Maintenance and repair of electrical and electronic equipment	B2.3 Detection of electric malfunction, location of faults and measures to prevent damage	Measure insulation resistance

Published: 2016-10-28-04:00