MMA Assessment OICEW-3-1E

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 requirement

Behavior	Standard
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

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

Location

Assessed in EN‑4231 Sea Term IV: Marine Engineering.

References

STCW Knowledge, Understanding and Proficiency

OICEW-B2.4

NVIC Tasks

See the Assessment Guidelines for additional specifications of behavior and standards.