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.
Overview of circuit breakers from SEZ Krompachy
Overview of circuit breakers from the European company SEZ Krompachy. Design features and installation of machines, as well as their main advantage.
How to check the varistor: external inspection and dial multimeter
How is the varistor checked for serviceability. External inspection of a varistor and a proverb by a multimeter or a megaohmmeter. The causes of the malfunction.
What is a varistor and why is it needed?
What is a varistor, what is its principle of operation and purpose. The main characteristics of varistors. Rules for choosing this protective device.
Why do I need a phase switch and where is it used?
What is a phase switch and where does it apply. Connection diagram of the phase switch to the network. Rules for choosing a switch between phases.
The main malfunctions of machines and the causes of their occurrence
The main malfunctions of circuit breakers, their causes and solutions. What to do if the machine does not turn on or knocks out.
Why do you need a spark protection device (USIs)
Overview of ultrasonic scanning devices-C1-40. What is a spark protection device for and how does it work? The connection scheme of the ultrasonic scanning device and checking its operability.
Why are limit switches needed and what types are they?
What are the limit switches for and what types of devices are. The principle of operation of the trailer (limit switch) and the scope.
What is ASU and what is it for?
Why do we need input-distribution devices and what types of ASU are. Complete set of input and distribution devices and their scope.
Rules for connecting a cross over switch
How to connect a cross over switch in a single-phase and three-phase network. Connection diagram of the ABB switch. Recommendations for installing a cross over switch.
How to connect a two-tariff electricity meter
How to connect a two-tariff meter in a single-phase and three-phase network. The procedure for switching to multi-tariff electricity metering.
How to replace an electric meter according to the rules
The procedure for replacing an electric meter in an apartment and a private house. What documents need to be prepared in order to change the electricity meter. Who pays for the replacement.
What to do if the electricity meter is broken
What to do if the apartment does not have an electric meter. The main malfunctions of electricity meters. How to pay for light when the meter breaks.
Electricity consumption has increased - what could be the reason?
The reasons for the excessive consumption of electricity at home, in the apartment and at the enterprise. What to do if increased energy consumption. Tips for saving electricity.
Why are traffic jams in the apartment being knocked out and how to eliminate this malfunction?
Why are traffic jams in the apartment being knocked out and what to do in this case? Causes of traffic jams. Where to go if the light goes out when the plugs are turned off.
Correct replacement of circuit breakers in the panel
How to replace the machine in the shield with a more powerful one or when the old circuit breaker fails. Rules for replacing circuit breakers in an apartment and a house.
5 ways to test the performance of the difavtomat
Not sure how to test a difavtomat for working at home? 5 effective ways to test a differential automaton are described in the article.
Rules for choosing a magnetic starter
Criteria for choosing a magnetic starter for the motor, lighting and other types of load. How to choose a magnetic starter for power, current and other parameters.
Characteristics of the electric meter СО-505
Technical characteristics of the electric meter СО-505. Connection diagram of the meter and overall dimensions. Design features of СО-505.
What is the ASTUE system?
What is the ASTUE system. The principle of operation of an automated system for technical accounting of electricity. Unlike ASKUE,
How to decipher the marking of the electric meter?
Standard marking of energy meters and their interpretation. How to decipher the abbreviation on induction electric meters and electronic (Mercury 230).
Specifications and wiring diagram UZM-3-63
The principle of operation and purpose of the UZM-3-63. Connection diagram of a multifunction protection device in a three-phase network. Technical characteristics of UZM-3-63.
Tips for choosing a voltage relay for a household network
How to choose a voltage relay for an apartment and a private house. Tips for choosing the characteristics of the voltage relay, manufacturer and version.
The right choice of current transformer for the meter
How to choose a current transformer for an electricity meter. Table and formulas for choosing a transformer for load current and power.
RCD connection diagram in a three-phase network
Consideration of schemes for connecting a three-phase RCD to a network with grounding. How to connect a four-pole residual current device.
