Theory: As electrical current flows through a conductor, heat is generated. Many electrical defects are accompanied by a rise in temperature for up to several weeks prior to failure. Some defects may be represented as cool components.
 Air Switch  on Bus Duct
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What Can Be Detected:
- Loose/deteriorated connections
- Overloads
- Imbalanced Loads
- Open Circuits
- Inductive Heating
- Harmonics
- Defective Equipment
Benefits:
- locate problems quickly, without interrupting service
- drastically reduce costly, unscheduled power outages
- minimize preventive maintenance time and maximize troubleshooting effectiveness
- prevent premature failure and extend equipment life
- identify potentially dangerous and hazardous equipment
- reduce insurance premiums and deductible payments
