HIGHSET (High Impedance Differential Protection) is a type of protection used in electrical systems to detect and isolate faults or abnormalities in the system. It works by measuring the difference in current between two points in the system and triggering an alarm or disconnection if a fault is detected.
HIGHSET protection works by using current transformers to measure the current at both ends of a protected circuit. The currents are then compared and any difference is considered a fault. If a fault is detected, the protection system will trip the circuit breaker and isolate the fault from the rest of the system.
HIGHSET protection offers a number of advantages over other types of protection. It is fast and sensitive, able to detect faults quickly and accurately. It is also reliable and can be easily integrated into existing protection systems. Additionally, HIGHSET protection is able to detect both internal and external faults, providing comprehensive protection for the system.
HIGHSET protection is commonly used in high voltage systems, such as transmission and distribution networks, as well as in large industrial and commercial facilities. It is also used in power generation and renewable energy systems to protect against faults and ensure system stability.
There are several different types of differential protection, including low impedance, solidly grounded, and high impedance. HIGHSET protection is unique in that it uses high impedance, or high resistance, to detect faults. This allows for faster and more sensitive detection, making it well-suited for high voltage systems. It also offers better selectivity, meaning it can isolate faults more accurately and prevent unnecessary tripping of healthy parts of the system.