Substation Technician Certification Program

MODULE DETAILS

PER MODULE Training Hours: 150+ Sections: 10 Exams: 10 Tuition: $602 per module, per trainee Online Testing (optional): Online Testing fee of $50 per apprentice is waived through 2021. Training Videos: Included with tuition

See pages 24-29 for section descriptions.

Current transformer Minimum pick-up taps Magnetic flux

1 2 3 4 5 6 Disk

Lag coil

Relay showing the tap settings which are utilized to set the pickup value

The drag magnet is situated on the relay to allow the disk to rotate through its magnetic fi eld which controls the speed of the rotation.

For setting the time the relay will take to close, a time dial (sometimes referred to a time lever) is utilized. The time dial moves the back stop where the moving contact rests further away from the stationary contact, which increases the distance and time the moving contact must travel to contact the stationary contact. Similar to the pickup tap, the time dial is the primary setting mechanism and if refi nements are needed, the adjustments are made with the drag magnet.

The drag magnet is situated on the relay to allow the disk to rotate through its magnetic fi eld, which controls the speed of the rotation. Using the principals of induction, the disk rotation is retarded by decreasing the air gap, which increases the strength of the magnetic fi eld. Conversely, by increasing the air gap and decreasing the magnetic fi eld, the disk will rotate more rapidly. In this manner, the relay timing setting can be precisely set to the desired time. CHAPTER TWO | OVERCURRENT RELAYS

Northwest Lineman Colleg e

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module one

• Introduction to Power Delivery • Substation Safety 1 • Working in Elevated Positions • Knots, Splices, and Rope • Electrical Systems • First Aid • Applied Mathematics • Basic Electrical Theory • Introduction to Substations • OSHA 1

module two

• Substation Safety 2 • AC Fundamentals • Working on Lines and Stations • Rigging • Disconnects and Switches • Substation Conductors • Substation Construction • Substation OSHA 2 • Circuit Breakers Substation Transformers

module three

• Supply Station NESC 1 • Supply Station NESC 2 • Substation Safety 3 • Metering and Instrument Transformers • Substation Design 1 • Capacitors, Reactors, and Surge Arresters • Introduction to Substation DC Systems • Electronics • Substation Maps and Standards • Substation OSHA 3

module four

• Substation Communication Systems • Substation Safety 4 • Substation Design 2 • Substation Special Elements • Substation System Operation • System Automation • Substation System Protection • Circuit Breaker and Instrument Transformer Testing • Relays • Transformer Testing