Learn the correct high voltage isolator (disconnector) switching sequence, three-phase interlocking logic, and IEC/IEEE standard references for safe substation switching operations.
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| Fig- A Fuse |
A circuit breaker is an electrical switching device that automatically interrupts the flow of electric current in a circuit when it detects an overcurrent or a fault condition. It is designed to protect electrical circuits and connected devices from damage due to excessive current or short circuits.
The primary purpose of a circuit breaker is to prevent electrical fires and equipment damage that could occur if an excessive current flows through a circuit for an extended period. By interrupting the current flow, the circuit breaker stops the current from reaching dangerous levels and thereby protects the circuit and connected appliances or devices.
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| Types of Circuit Breakers |
Circuit Breakers are mechanical switching devices that can make, break, or carry a circuit manually or automatically under normal and abnormal conditions.
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| Fig-Residual Current Device Connection Procedure |
