This series of current transformers is epoxy resin vacuum casting fully-enclosed support-type, they adopt advanced materials and technology, they are used for current, power measurement and relay protection indoors alternate power system with frequency 50-60Hz, rated voltage 10kV and below. This series of products has the newest series super precision, super bynamic and thermal stability, largecapacity, number of secondary winding is 2-4, can be arbitrarily composed by different needs.