What is protection selectivity?
What is the selectivity of protection of the electrical network. The main functions and types of selectivity of protection in electrical installations. An example of a selectivity map.
Electrical equipment
Please specify the section:
Automata and RCD
Relays, contactors, sensors
Electric motors
Electric meters
What is relay protection and what is it for?
Purpose of relay protection and basic requirements for it. Find out what RPA consists of and where it is used in energy.
What are time relays?
The main types of timers. Find out what devices are and how they work. Overview of electromagnetic, pneumatic, motor and other types of relays.
Learning to distinguish RCD from a differential automaton - 4 external signs
You do not know how to distinguish RCD from a difavtomat visually? For you, we have prepared 4 external differences between the devices. Also, the main differences are shown in the video.
What are the DIN rails?
All information about what sizes and types of DIN rails are. Find out what a din rail is, what it is used for and why it is popular with electricians!
How to connect a magnetic starter - instructions with diagrams
Connection diagrams of a magnetic starter for 380 and 220 volts. How to connect a starter through a push-button post and a thermal relay. Reversible and non-reversible circuit.
How does a voltage relay work and what is it used for?
What is the voltage monitoring relay used for and how? Device, principle of operation and purpose of RN-104 at 40 A from Novatek-Electro.
Break relay based on the widespread “breaker”
A new development in the field of surge protection is a break relay. What a break relay consists of, how it looks and works, you can find out here!
Design of synchronous voltage limiter
Design of a synchronous voltage limiter (ONS). The main advantages of this development over existing analogues. Video test examples ONS.
Why does the circuit breaker trip?
What to do if the machine is knocked out in the shield? The main reasons for opening a circuit breaker in a house and apartment. How to find a short circuit yourself.
Who should pay for the replacement of the electricity meter?
You do not know at whose expense the electric meter is replaced in a private house and apartment? We tell who should pay if they change electricity meters.
Typical three-phase meter connection schemes
Typical schemes for connecting a three-phase meter through current transformers, direct, indirect and semi-indirect switching. Instructions for connecting wires.
How does a magnetic starter work?
How does a magnetic starter work and what does it consist of? The main structural elements and the starter circuit. Schemes of devices of the PM12, PME, PAE-312 series.
How to check the correct operation of the electricity meter yourself?
How to check the electric meter for self-propelled, magnetized, correct connection. Video instruction for checking the electricity meter at home.
9 circuits for correctly connecting a voltage relay
Learn how to connect the voltage relay after the meter to the contactor, magnetic starter and RCD. The connection diagram of the ZUBR, RN-111m, RN-113, RN-311 and DigiTOP relays.
6 important criteria for choosing a circuit breaker
Difficult to choose a circuit breaker for your home? Learn the rules for choosing an automatic machine for short circuit current, power and other characteristics!
We take readings from the counters Mercury, Micron, Energomera
Not sure how to take readings from an electricity meter? Check out the tips for taking readings from electricity meters Mercury, Energomera and Mikron.
Rating of the best manufacturers of circuit breakers
Do not know which company to choose a circuit breaker for home or apartment? To your attention a review of the best manufacturers of automatic machines in terms of price and quality!
Instructions for connecting the voltage monitoring relay
Do not know how to connect a voltage monitoring relay in the apartment panel? To your attention, a DIY installation manual, video example and connection diagram.
4 ways to test the performance of an RCD
Do not know how to check the performance of an RCD at home? To your attention 4 safe verification methods shown in the photo and video examples.
Wiring diagram for a single-phase electric meter to a 220V network
The connection diagram of the meter with RCD and automatic machines in a single-phase 220 V network. Features of installing an electric meter for one and two tariffs, in a network with grounding and without.
Connection diagram for differential automaton
Connection diagram of a differential machine in a single-phase and three-phase network, with and without grounding. How to connect a difavtomat in an apartment, an old and a new house.
How to connect the difavtomat correctly?
Not sure how to connect a difavtomat? Here you will find instructions for connecting a differential machine with grounding and without it with a circuit and video tutorial.
How to choose an electricity meter and which is better in 2019
Which electricity meter is better to buy for a house, apartment and cottage. Criteria for choosing a meter for power, current, accuracy class, company. List of the best models.
Why does an RCD work and what to do in this case?
The reasons for the operation of the RCD without load, grounding, when connecting an electrical device. What to do if a residual current device trips.
How to choose an RCD for the house and apartment?
Tips for choosing an RCD for the house, apartment and cottage.The best manufacturers of residual current circuit breakers. How to choose an RCD by power, amperage and leakage current.
