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TestGuy
28 followers -
Electrical power systems maintenance, testing and troubleshooting.
Electrical power systems maintenance, testing and troubleshooting.

28 followers
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The racking mechanism #safety interlock prevents a #circuitbreaker from moving out of the connection position before the contacts are in the open position. https://testguy.net/content/260-Circuit-breaker-safety-interlock-systems-explained

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Improve your protective #relaying vocabulary with this page of 200+ terms and definitions https://testguy.net/content/263-Protective-Relaying-Terms-and-Definitions
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Keeping #electrical equipment clean is an important part of any preventive #maintenance program, but using the wrong cleaning methods could be costly. https://testguy.net/content/235-Cleaning-Methods-for-Electrical-Preventive-Maintenance

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It is critical that medium-voltage #circuitbreakers be tested and maintained to ensure reliable operation during #electrical faults. https://testguy.net/content/255-3-Basic-Electrical-Tests-for-Medium-Voltage-Circuit-Breakers
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You can easily test for #transformer polarity by applying a reduced voltage across H1- H2, and recording the voltage measured on the secondary. https://testguy.net/content/254-Transformer-Polarity-Test-Procedures

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