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Medium Voltage Power Systems

Course No.: MV101 and MV102
CEUs 1.6

Tickets

9 available
San Francisco$895.00February 12 - 13, 2018
40 available
Philadelphia, PA$895.00August 13 - 14, 2018
40 available
Chicago, IL$895.00November 8 - 9, 2018

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Medium Voltage Power Systems

The backbone of many electric power systems is the medium voltage distribution system. Typically operating at voltages ranging from 2,400 to 34,500 Volts, voltage stress, corona, surges and protection of equipment all create unique challenges in design, equipment selection, operation and engineering.

This 2 day class by Jim Phillips, P.E. takes you through the fundamentals of medium voltage power systems including the components, equipment, design and operation problems as well as overcurrent protection, surge protection, insulation coordination and many other important aspects of medium voltage power systems.

[See more about Jim Phillips]

One of the many topics that Jim discusses in this 2 day class is overcurrent relays and relay settings including determining the current transformer ratio, CT saturation calculations, determining overcurrent relay settings and calculating transformer differential relay settings.  This class also includes many other topics such as surge protection, insulation coordination and more.

Register 3 People and the 4th is FREE!


DAY ONE

INTRODUCTION
Medium Voltage Systems, Voltage Ranges, Special Considerations
Failure Modes, Voltage Stress, Thermal Stress

MEDIUM VOLTAGE SAFETY
Electrocution at Low vs. Medium Voltage, Arc Flash Issues, Qualified Person,
Approach Boundaries

TYPES OF MEDIUM VOLTAGE SYSTEMS
Utility and Industrial One lines, Reliability Requirements, Overhead and Underground
Systems, Regulated Systems

MEDIUM VOLTAGE CABLE
Copper vs. Aluminum Design, Voltage Ratings
Insulation Ratings, 100%, 133%, 173% Insulation Levels, Shielding Requirements,
Electric Fields, Terminating MV Conductors, Orientation of Overhead Lines

MEDIUM VOLTAGE SUBSTATION TRANSFORMERS
Core and Coil Design, Aluminum and Copper Windings, Transformer Characteristics, Tank Construction, Loss Evaluation, Loss Calculations, Efficiency Calculations, Regulation

SPOT NETWORKS
Spot Network Design, Network Protectors, Network Protector Relay Operation, Directional Protection Requirements, Large Network Fault Currents

PARTIAL DISCHARGE
Corona, Surface Tracking, Voltage Stress, Sensing Partial Discharge, Component Failure

GROUNDING MEDIUM VOLTAGE SYSTEMS
Resistance Grounding, Solid Grounding, Ungrounded Delta Charging Current, Coefficient of Grounding Calculations, Effect of Ground Faults on Delta Voltage, Sizing Grounding Resistors, High Resistance Grounding vs. Low Resistance Grounding

OVERVIEW OF SYMMETRICAL COMPONENTS
Positive, Negative and Zero Sequence Impedance, Per Unit
Line-to-Ground Short Circuit Calculations

SURGE PROTECTION
Lightning and Switching Surges, Classes of Surge Arresters, Insulation Basic Impulse Level BIL ,  Basic Impluse Switching Insulation Level (BSL) Front of Wave (FOW), MCOV Ratings – (Maximum Continuous Operating Voltage) TOV – (Maximum Temporary Over Voltage Capability), Protective Characteristics, Surge Arrester Selection, Energy Capability, Effect of Grounding on Arrester Selection, Insulation Coordination, Protective Ratio and Protective Margin Calculations.

DAY TWO

CURRENT TRANSFORMER APPLICATIONS
Ratings, Selection Process, Accuracy, Saturation, Excitation Curves, Burden,
Calculation, Momentary Ratings, CT Saturation Calculations for Performance

MEDIUM VOLTAGE CIRCUIT BREAKERS
Vacuum, Air, Oil, SF6 Designs, Symmetrical Interrupting Rating, K-Rated
Voltage Factor, Close and Latch Capability

OVERCURRENT RELAYS
Protective Relay Concepts, Selective Coordination Principles, ANSI Device Numbers i.e. 50, 51, 67, 32, 27, etc.  Amp Tap, Time Dial, Instantaneous Setting   Relay Setting Calculations, Digital Relays, Electromechanical Relays, Time Margins, Coordination Between Devices

RECLOSERS
Application on Feeder Circuits, Recloser Settings, Continuous Current and Interrupting Ratings

MEDIUM VOLTAGE FUSES
Medium Voltage Switches, Load Rating, Expulsion vs. Current Limiting Fuse Characteristics, E and R Rated Fuses, Fuse Cutouts, ANSI Time Current Points

MEDIUM VOLTAGE PROTECTION CONCEPTS
Medium Voltage Protection, Relays, Circuit Breakers, R and E rated Fuses,
Short Circuit vs. Overcurrent Protection

DISTRIBUTION FEEDER PROTECTION
Protection with Fuses – 300%, Overcurrent Protection with Relays – 600%,
Short Circuit Damage Characteristics, Relay “Reach” for End of Line Faults

ROTATING MACHINERY PROTECTION
Protection Requirements, Generator Decrement Curves, Thermal Damage Curves, Reactive,
Capability Curves, Differential Protection, Protection Example Calculations

MEDIUM VOLTAGE MOTOR CONTROLLERS
Protection Requirements, Motor Management Relays, Circuit Breaker Protection, Relaying, Class R Rated Fuses

TRANSFORMER PROTECTION
ANSI C57 Transformer Thru Fault Curves, Impact of Transformer Winding Configuration,
Overview of Differential Protection, Inrush and Harmonic Restraint, Hands On Differential Relay Setting Calculation Problems and Calculation Worksheets.


Questions?

Brain LogoFor questions, registration information or to discuss holding this class at your location as an on-site training program, contact our Program Director at 800.874.8883

Brainfiller, Inc. | P.O. Box 12024 | Scottsdale, AZ 85267