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How does sacrificial protection work?
Sacrificial protection is basically attaching a piece of metal that is more reactive that iron to the object made of iron. This more reactive metal, commonly magnesium or zinc, will corrode in the...
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How does ground-fault protection work?
GFI's (Ground Fault Interruptors) measure the difference between the hot conductor current and the neutral current.
In a normal (no fault) circuit, every single milliamp of current flowing out of...
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How does copy protection work?
Many copy protection systems rely on encryption and hardware-based key storage. Some of them take a simpler route, using code obfuscation or merely checking if the dongle has been inserted. The...
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What are the common testing in cathodic protection?
The primary method to verify a cathodic protection (CP) system is providing adequate corrosion protection is measuring the DC pipe-to-earth or DC structure-to-electrolyte potential with respect to a...
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What is directional protection relay and how is it works?
Directionalized relays are relays that use a polarizing circuit to determine which "direction" (in the zone of protection, or out of the zone protection) a fault is. There are many different types...