This course is designed for electricians, technicians, supervisors, and others involved in the maintenance and operation of industrial plants.
Our teaching methods include heavy class participation, visual aids, texts. Our instructors have many years' experience and take a non-intimidating, no-nonsense approach in their presentation. Attendees should bring note taking material and a hand held calculator. This course is a minimum of 40 hours.
I. Review of AC Theory With Emphasis on
A. Inductance & Capacitance
B. Power Factor
C. Wye & Delta Systems
II. Transformer Connections
A. Delta/Delta
B. Delta/Wye
C. Wye/Delta
D. Wye/Wye
E. Open Delta
F. T Connections
G. Third Harmonics & Tertiary Windings
III. System Grounding
A. Ungrounded
B. High Resistance Grounded
C. Low Resistance Grounded
D. Impedance Grounded
E. Zig Zag Grounding Transformers
IV. Nature & Causes of System Overvoltages
A. Series Resonance to Ground
B. Arcing Ground Faults
C. Switching Surges
D. Forced Current Zero Interruption
E. Autotransformer Connections
V. Short Circuit Considerations
A. Symmetrical & Asymmetrical Current
B. Percent Impedance
C. Transient & Subtransient Reactance
D. Fault Contribution From Motors
E. Series Reactors
F. Current Limits Protectors (clips)
VI. Power Circuit Breakers
A. Air Blasts
B. Bulk Oil
C. Minimum Oil
D. Air (Magnetic)
E. Vacuum
F. SF6 (Sulphur Hexaflouride)
VII. Instrument Transformers
A. Current Transformers
1. Metering accuracy
2. Relaying accuracy
3. Behavior under fault conditions
4. Multi ratio
5. Zero sequence
B. Potential Transformers
1. Accuracy classes
2. Connections
3. Open Delta
4. Open corner delta
VIII. Protective Relays
A. Standard Number System
B. Inverse, Very Inverse, Etc.
C. Tap Settings & Time Dial
D. Time/Current Curves
E. Direct vs. Lockout Tripping
F. ICS (SI) Settings
G. Instantaneous & Time Overcurrent
H. Directional Overcurrent
I. Voltage Restrained Overcurrent
J. Differential
K. Reverse Power
L. Over/Under Voltage
M. Over/Under Frequency
N. Gas Pressure
O. Thermal
IX. Low Voltage (600 V) Fuses
A. Current Limiting
B. Non-Current Limiting
C. Standard C22.2 No. 106-M1985
D. Applications Regarding
1. Motors
2. Transformers
3. Capacitors
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