A current transformer is a power measurement device used to convert high current into low current for measurement and protection in low voltage circuits.
Current transformers are usually installed in the current circuit and are mainly used to monitor and detect the magnitude of the current. They can also be used to measure parameters such as frequency, phase, and power factor of the current.
In the power system, the role of current transformers is very important. They can be used to detect faults and abnormal situations in the power system, and trigger protection mechanisms by sending information to protection devices to avoid the spread of faults in the power system.
Current transformers can also be used for energy metering, such as in power plants, substations, industrial sites, etc. In addition, current transformers are often used in testing equipment such as power analyzers, power monitors, and power quality analyzers.
In summary, current transformers play a crucial role in the power system and are of great significance in ensuring the safe operation of the power system and the stability of power quality.