EIT30EIT300S is a rail-mounted intelligent power monitoring terminal. It adopts industrial-grade microprocessor and can perform high-precision measurement in complex electromagnetic situations. It has acquisition functions such as three-phase AC voltage, current, residual current, power, frequency, electric energy, temperature and humidity, etc. It can calculate important parameters such as demand, harmonics, phase angle, etc. Switch displacement events, etc., and can perform remote parameter setting, and can also perform local parameter setting through mobile phone Bluetooth.