Calculation of current transformer: starting and rated current, 10 kV example. How to choose a current transformer for accounting purposes. Accuracy class of current transformers. An example of the choice of a current transformer for installing design meters.

Electromagnetic starter 220V and 380V: DIN rail, device and principle of operation. How to connect a three-phase reversing electromagnetic starter. Reverse starter circuit with buttons and limit switches.

Why the LED lamp blinks when the switch is off: how to get rid of the problem. Causes of flickering in off LED lamps. Types of flickering LED lights.

Alternator: circuit and types, induction and electromechanical. Single-phase and three-phase alternators and features of their use. Where are AC generators used?

How to disassemble the light switch: tools and detailed instructions for disassembling. Features of disassembling light switches with indicator. How to disassemble a three-key switch with a socket.

How to connect a two-key switch Legrand: scheme, loop-through and cross. Features of connecting wires in Legrand switches with two keys. Schematic diagram of the operation of the passage switch.

Current transformer: summing, secondary, ratings and design. How is a current transformer different from a voltage transformer. What transformers are used to supply electricity to residential buildings. Parameters of current transformers.

Electric meter with remote control: single-phase and three-phase, control and alteration. How does an electricity meter work with a remote control? Manual and automatic shutdown setting and timer activation on the control panel.

Electrical protective equipment: classification, list and requirements of operation. With regard to basic and additional electrical protective equipment. General rules for the use of electrical protective equipment up to 1000V.

Loss of electricity in electrical networks: ratio and standard. How to calculate the loss of electricity to the border of the balance sheet. Ways to combat the loss of electricity. Who pays for the loss of electricity in networks.

Grounding bus: selection of installation location and technical specifications. What is the main grounding bus. How to install grounding buses. Where is it best to install a grounding bus: on a pole, in a cabinet or outside the cabinet.