It features instant start and rugged operation while enduring high temperatures, high radiation, electromagnetic pulse, and repeated overvoltage and overcurrent events.
These are robust, purpose-built amplifiers with many application-specific design features such as overcurrent protection and aggressive high-pass filtering for flyback voltage protection.
Medium-voltage circuit breakers nearly always use separate current sensors and protective relays, instead of relying on built-in thermal or magnetic overcurrent sensors.
Fuses have different characteristics of operating time compared to current, characterized as, according to time required to respond to an overcurrent condition.
The connection between neutral and earth allows any phase to earth fault to develop enough current flow to trip the circuit overcurrent protection device.
