... iron base,short terminal cover 3.IEC62053-21 DD862 single phase mechanical power meteris a kind of induction meter, ... glass, plastic, transparent PC which is anti-UV molded overall, or bakelite with glass window (optional); Meter base steel, bakelite ... standard or special one;♦Single component measures single-phase two-wire active energy consumption,Complying with standard IEC62053-11;TECHNICAL ...