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§ 3 Terms and definitions

In the subsequent presentation, 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) means of measuring electricity and power to the point of measurement 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 a single point of measurement (distinguish between DC and AC meters, the latter being divided into single-phase and three-phase meters, as well as 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's measuring element is a part of the counter that includes a series current circuit and a parallel voltage circuit for measuring the power and energy consumed at one point of the electrical circuit.

The two-element counter 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 the three phases of the network to measure 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 for the sale 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 a contract for the supply of energy.