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§ 3 Terms and definitions

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

Transformer voltage (TN) measuring - metrologically certified transformer for connecting low-voltage (up to 0.4 kV) means of measuring electricity and power to the point of measurement with high voltage.

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

Electric meter ( electric meter, meter ) - a device for measuring the amount of electricity at one measurement point (distinguish between DC and AC current meters, and the second is divided into single-phase and three-phase, and also designed to measure active and / or reactive energy in one and / or both directions of transmission).

Induction counter - counter with the electromechanical principle of measurement and display of measurement data values.

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 meter that includes a series current circuit and a parallel voltage circuit for measuring power and energy consumed at one point of the electrical circuit.

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

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

Energy (power) sales - the activity of energy companies selling buyers (consumers) of electricity (power) received from the wholesale or retail electricity market.

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