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§ 3 Terms and definitions

In the following, special terms will be used. For people far away from the power industry, their decoding is given below, and in the future I will not return to it.

Voltage transformer (VT) measuring - metrologically certified transformer for connection of low-voltage (up to 0.4 kV ) measuring instruments of electricity and power to the measuring point with high voltage.

Current transformer (TT) is a metrologically certified transformer for connection of low-current (up to 5 A) means of measuring electricity and power to a measuring point with a high current value.

Electric meter ( electricity meter, meter ) is a device for measuring the amount of electricity at one point of measurement (distinguish between DC and AC meters, the latter being divided into single and three phase ones, and also intended for measuring active and / or reactive energy in one and / or both directions of its transfer).

Induction counter - a counter with an electromechanical principle of measuring and displaying the values ​​of the measurement data.

Hybrid counter - a counter with an electromechanical or electronic measurement principle and the opposite principle of displaying measurement data.

Electronic counter - a counter for measuring the quantity and / or quality of electricity and power with an electronic circuit for measuring and displaying measurement data.

The meter measuring element is a part of the counter, which includes a series current circuit and a parallel voltage circuit for measuring the power and energy consumed at one point of the electrical circuit.

A two-element meter is a three-phase meter with two measuring elements connected to two phases of the network for measuring the power and energy consumption in 3-wire networks with symmetrical load.

The three-element meter is a three-phase meter with three measuring elements connected to three phases of the network for measuring the power and energy consumption in 3-wire networks with unbalanced load and in 4-wire networks with neutral.

Sales of energy (capacity) - the activities of energy companies to sell to consumers (consumers) of electricity (power) received from the wholesale or retail electricity market.

Subscriber direct ( subscriber ) is a consumer whose network and receivers are directly connected to the networks of the power supply organization, which has a border with the balance of the networks and the contract for the supply of energy.