... the electric fence,the meter can be applied in various control system,sourcemanagement system,power monitoring and ... rate power2.The meter can measure the voltage in power network,the harmonic obtained rate of 2 ... photo couple relay switch output,and alarm indicate in all environment so as to protect the output ... each current and voltage harmonic,YV,YI,UP,UN,IP,IN,20pieces SOE event record,2 loops energy ...