The main types of tests of induction motors
Before commissioning or after repair, various tests of asynchronous motors are carried out. Test methods and standards are described in the article.
Question about connecting Wekrel walk-through switches with backlight
On loop-through switches with backlight, the backlight does not go out when the light is on. When turned on, it remains lit. How to connect so that everything works correctly?
Why did the Mercury 200 electricity meter melt?
On the Mercury 200 electric meter, terminal blocks and the body around them were melted. What could be the reason? The wiring is good.
False positives
The sockets are protected by the AD12 difleftomat; it trips without load and disconnects the line. When connected, this does not happen. What to do and what is the reason?
Conventional graphic designation of electric motors in the diagram
UGO of asynchronous, synchronous, collector and other types of motors according to GOST 2.722. The article gives the correct designation of electric motors in the diagrams.
Combining several electricity meters in a network
It is necessary to connect two electric meters to different rooms of one object. How to make them count independently of each other?
Overview of VA 47-63 EKF PROxima circuit breakers
What is the difference between VA 47-63 EKF PROxima circuit breakers, what are their features and advantages. Overview of the design of modular automatic machines EKF PROxima.
What affects the life of the electric motor and how to extend it
What determines the life of an electric motor and how to extend it? In which GOST and regulations are described the requirements for the selection and operation of electric motors.
How to change zero to phase in the light switch?
How to change the connections in the wiring so that the switch breaks not phase but zero? It is necessary to change since the LED is lit when the LED lamp is off.
What is the best way to connect an electric stove: to 380 or 220 volts?
I laid a 3x6 mm² cable for a 7.9 kW electric stove, will there be phase imbalance? Is the input three-phase, can it be better connected to the three phases with a 5x2.5 mm² cable?
Why gently change aluminum wiring?
Tell me whether it is worth changing the old aluminum wiring to copper or not? How is this dangerous and what is the justification for replacing wiring?
How many fixtures need to be installed in the classroom?
How many 36W and 2800Lm luminaires need to be installed in a class measuring 10x70x3m? In which document is standardized lighting in educational institutions?
Why does the phase disappear under load in outlets?
If nothing is plugged into the outlet, there is a phase. When you connect electrical appliances, it disappears and the devices do not work. What could be the reason?
Which wire to choose for USB charging?
Need a wire for USB charging with minimal voltage loss. Needed for testing gadgets. What section and length should be used?
What are the brushes for electric motors and how are they marked
Decoding marking brushes for electric motors. Correspondence table for Bosch and Makita power tool motors. What are the criteria for choosing a brush.
Is it possible to replace the light switch mechanism?
In the two-key switch, part of the mechanism of one of the keys broke off. Is it possible to replace only it or do I need to buy a whole new switch?
Are my analogies correct for current, voltage and potentials?
Are the analogies correct that current is speed, voltage is the cause of speed, resistance is an obstacle? Or are there other more correct ones?
Voltage drop in one phase at engine start
Because of what, when connecting a three-phase motor on one of the phases 110V instead of 380V? Inter-turn short circuit or poor contact? How to find a reason?
Why did the electricity meter wind up more?
We noticed that at the same load the meter began to wind more electricity. With all the appliances turned off, it keeps spinning, what should I do and what is the reason?
Why did the counter start to make strange sounds and what to do?
The electrician began to make strange sounds, as if from a circuit. This is manifested under any load. What to do and where to go?
Can I connect an electric oven in Brezhnevka without grounding?
I connect an electric oven in a panel house. There is no grounding, laid copper wiring and installed the machine. Can I use a cabinet in this case?
Assembly diagram of a three-phase electrical panel for a two-room apartment
Check the correctness of the three-phase electrical panel diagram for a two-room apartment. It has voltage relays, RCDs, automatic devices, as well as non-disconnect lines.
What section do you need a wire for an extension cord?
Need to carry to connect a 2 kW chain saw. Tell me what section is better to buy a wire?
How can I control the speed of an induction motor: an overview of the ways
Methods for adjusting the speed of an induction motor without loss of power. How to regulate the speed of rotation of an asynchronous electric motor with squirrel-cage and phase rotor.
