relay:
1.miniature size,high sensitivity,high switching capacity,low power consumption,easy to install
2.be used in the circuit of 50HZ-60HZ,suitable for thermal protection in the circuit
3.high performance,single and double contact types
4.available in a wide variety of specification


current transformer:
1.Ac circuit,Rated voltage,Frequency:50HZ-60HZ
2.single-phase non-earthed voltage transformer
3.PC housing with UV protection,automatic protection against short  circuit
4.the principal measuring device for protection and metering schemes in any power system
5.be applied to test,control,display and record the running of electrial


manganin shunt:
1.work in all kinds of electrical meter as power measurer