Electricity meter type t31 is best suited for measuring active energy for direct connection and connection via measuring transformers in three-phase three- or four-wire networks at balanced or unbalanced load. The active meters connected via instrument transformers can be also class1. The measuring and technical characteristics of active meters include: en publication 60 521, iec publication 521, and other national standards, such as vde 0418, bs 5685.. The accuracy class is 2. Electrical data includes:low self consumption and starting current whole current / transformers operated three phase 3 wire / 4 wire. Voltage: 3 x240v, / 415v; overload capacity: 120%, 200%, 300%, 400%, 500% & 800%; accuracy: class 1.0 or class 2.0.
