Description

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 takes you through the basics of medium voltage power systems including components, equipment, design, and operation problems as well as protection of medium voltage systems.

Outline

1. MEDIUM VOLTAGE SAFETY

• Electrocution at Low vs. Medium Voltage, Arc Flash,
• Qualified Person, Approach Boundaries

1. TYPES OF MEDIUM VOLTAGE SYSTEMS

• Utility and Industrial One lines, Reliability Requirements,
• Overhead and Underground Systems, Regulated Systems

1. 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

1. MEDIUM VOLTAGE SUBSTATION TRANSFORMERS

• Core and Coil Design, Aluminum and Copper Windings
• Tank Construction, Loss Evaluation, Efficiency, Regulation

1. SPOT NETWORKS

• Spot Network Design, Network Protectors, Network Protector
• Relay Operation, Directional Protection Requirements

1. PARTIAL DISCHARGE

• Corona, Surface Tracking, Voltage Stress, Sensing Partial
• Discharge, Component Failure

1. GROUNDING MEDIUM VOLTAGE SYSTEMS

• Resistance Grounding, Solid Grounding, Ungrounded Delta
• Charging Current, Effect of Ground Faults on Delta Voltage

1. SURGE PROTECTION

• Lightning and Switching Surges, Classes of Surge Arresters
• MCOV Ratings – (Maximum Continuous Operating Voltage)
• TOV – (Maximum Temporary Over Voltage Capability),
• Protective Characteristics, Surge Arrester Selection, Energy
• Capability, Effect of Grounding on Arrestor Selection,
• Insulation Coordination,

1. CURRENT TRANSFORMER APPLICATIONS

• Ratings, Selection Process, Accuracy, Saturation, Excitation
• Curves, Burden Calculation, Momentary Ratings

1. MEDIUM VOLTAGE CIRCUIT BREAKERS

• Vacuum, Air, Oil, SF6 Designs, Symmetrical Interrupting
• Rating, K-Rated Voltage Factor, Close, and Latch Capability

1. RECLOSERS

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

1. MEDIUM VOLTAGE FUSES

• Medium Voltage Switches, Load Rating, Close and Latch
• Rating, Short Time Rating, Expulsion vs. Current Limiting
• Fuse Characteristics, E and R Rated Fuses, Fuse Cutouts

1. MEDIUM VOLTAGE PROTECTION CONCEPTS

• Medium Voltage Protection, Relays, Circuit Breakers, R and
• E rated Fuses, Short Circuit vs. Overcurrent Protection

1. DISTRIBUTION FEEDER PROTECTION

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

1. ROTATING MACHINERY PROTECTION

• Requirements, Decrement Curves, Thermal Damage Curves,
• Reactive, Capability Curves, Differential Protection

1. MEDIUM VOLTAGE MOTOR CONTROLLERS

• Protection Requirements, Motor Management Relays, Circuit
• Breaker Protection, Relaying, Class R Rated Fuses

1. TRANSFORMER PROTECTION

• ANSI C57 Thru Fault Curves, Impact of Transformer Winding
• Configuration, Overview of Differential Protection, Inrush and
• Harmonic Restraint

Participants

• D3 atau SLTA yang berpengalaman kerja minimal 3 tahun, dan atau setara. 
• Teknisi, Operator dan Supervisor didalam bidang management kelistrikan dan atau non teknik.
• Mereka yang dalam tugasnya berhubungan dan atau terkait dengan materi kursus.

Metode   
Presentation, discuss the case study.

Instructur
Tugino, ST.,MT dan Tim

Having knowledge and experience as practician and trainer in Electricity Maintenance.