The mining industry uses a large amount of electric power. Their equipment is subject to extreme environmental conditions and mechanical shock. A significant number of electrical accidents are a result of improperly grounded electrical equipment.
Accident statistics compiled by MSHA’s Health Safety Analysis Center indicate that approximately 14% of all electrical fatalities occur from improper or inadequate grounding.
Once a reliable system ground has been established that connects all the metallic frames of electrical equipment together, then the grounding system must be placed at some reference potential.
Improper frame grounding is the cause of many electrical accidents in metal/nonmetal mines. It is therefore important that the frame grounding system be periodically tested to determine if the grounding conductor is continuous throughout the mine power system. This course will provide the information on how to conduct this test.
Grounding conductors in trailing cables, power cables, and cords, which supply power to portable electrical equipment require testing more frequently than the annual testing required of grounding conductors which are exposed or subjected to vibration, flexing, corrosive environments or frequent lightning hazards. This course will provide procedures and methods for these tests.
After Attending, You Will Learn:
Electrical Grounding and Bonding for Mining Applications
DAY ONE
SESSION 1: ELECTRICAL GROUNDING – SCOPE
SESSION 2: CLASSIFICATION OF VARIOUS GROUNDING STANDARDS. CODES AND RULES
SESSION 3: ELECTRICAL GROUNDING ELECTRODE SYSTEM
SESSION 4: SAFETY GROUNDING
SESSION 5: EQUIPMENT BONDING & GROUNDING
SESSION 6: EMERGENCY POWER SYSTEMS
DAY TWO
SESSION 7: GROUND CHECK MONITORS FOR UNDERGROUND POWER SYSTEMS
SESSION 8: GROUND RESISTANCE TESTING IN THE MINING INDUSTRY
SESSION 9: LIGHTNING PROTECTION
SESSION 10: SAFE MEASUREMENT OF GROUND RESISTANCE
SESSION 11: CONSTRUCTION OF DRIVEN ROD GROUND BEDS
SESSION 12: SUBSTATION GROUNDING & BONDING FOR MINE POWER SYSTEMS
Review of expectations
Questions and Answers
COURSE SCHEDULE:
Both days:
Start: 8:00 a.m.
Coffee break: 10:00 a.m.
Lunch: 12:00 noon
Finish: 4:30 p.m.
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