... factor: class 2.5, accuracy of ANNAI 48-A.V: class 2.5 2. Operation conditions: working temperature-25C ... two types of construction, ANNAI series,ampere, voltage meters are electromagnetic series adopting repulsive construction. When meter in AC circuit, the ... 4 the reverse torque equality ANNAI series frequency active reactive power, power factor meter are adjustable current type. The construction ...