DDSY6789 single phase prepayment electric meter, LCD display, long terminal block. Single phase electronic LCD prepaidenergy meterCurrent:1 ... for the rated frequency of 50/60HZ three phase AC active electric energy.2. Power-down, the table ... safe and reliable.6. Relay load capacity, electric shock current of current energy meter maximum current ... can withstand 8KV ESD attack. Single phase electric meter