Assessment OICEW-3-1E
Determine phase rotation
Assessed in EN-4231 Sea Term IV: Marine Engineering
Condition
Aboard ship or in a workshop, given access to 3-phase electrical AC motor controller, a phase sequence indicator, and other proper tools and safety equipment.
Performance Requirements
| Behavior | Standard |
|---|---|
| The student will: | During assessment, the student shall, at a minimum: |
|
Check phase rotation using phase rotation meter prior starting an ac motor |
Use meter according to manufacturers instructions Identify phase sequence on meter Match phase sequence to motor rotation direction |
|
Determine if phase rotation is correct for desired direction of motor rotation |
Predict direction motor will rotate Verify motor rotates in predicted direction State how to reverse motor |
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 |
B2.4 Construction and operation of electrical testing and measuring equipment |
Determine phase rotation |
Published: 2016-10-28-04:00