Quite often, this situation occurs: the circuit breaker is periodically knocked out and another larger rating is installed in its place, “so as not to knock out”. Why does the circuit breaker trip in this case, and what are the consequences of such a replacement?

The rating of the circuit breaker is selected in such a way as to protect the load line wire from overheating and melting of the insulation. The circuit breaker must disconnect the line from the load before the current reaches a critical value for the cable.

When devices of higher power (and therefore higher current) are turned on in lines that are not designed for this power, the cable overheats in the circuit, which leads to the thermal protection of the circuit breaker tripping, i.e. he "knocks out" ...

If you need to replace the apartment switchboard, many questions arise. If a person does not have electrical work experience, then he is inclined to solve this problem by attracting a specialist. But is it difficult to actually replace the electrical distribution panel of the apartment?

In this article, we will consider the process of replacing a dashboard in various situations, give practical recommendations that will help to carry out this work on their own, without the help of specialists.

The complexity of the work in this case depends on the current status of the shield. Damage to the old shield due to fire is the most difficult option. The complexity of the work in this case is due to the fact that when a shield ignites, the wiring lines that are connected to it are also damaged.If the wiring lines in the shield are damaged ...

The manufacturer of the optimizer for the load on the electric network OEL-820 was contacted by an electrician serving the cottage village, and ordered a whole box of OEL-820. After some time, managers called back the buyer to find out how he operates the devices. And it was curious why he needed so many optimizers?

It turned out this. In the holiday village there is an old high-voltage transformer KTP, whose power is limited. Therefore, in the spring, autumn and winter, when energy-intensive electric heating appliances and water heaters were turned on in the houses, the total power consumption increased, and the voltage in the village electric network dropped. When turning on electric kettles and submersible borehole pumps with a high starting current, the voltage sagged still, albeit briefly. The situation was aggravated by the fact that the wiring in the houses is old, with insufficient cross-section ...

At the end of the article “An ideal operational amplifier”, it was shown that when using an operational amplifier in various switching circuits, the amplification of the cascade on one operational amplifier (OA) depends only on the depth of feedback. Therefore, in the formulas to determine the gain of a particular circuit, the gain of the “bare” op-amp, so to speak, is not used. That is just that huge coefficient which is specified in directories.

Then it’s quite appropriate to ask the question: “If the final result (gain) does not depend on this huge“ reference ”coefficient, then what is the difference between the opamp with amplification several thousand times, and with the same opamp, but with amplification several hundred thousand and even millions? ” The answer is quite simple. And in both cases the result will be the same, the amplification of the cascade will be determined by the elements of the environmental protection system, but in the second case ...

If you use an operational amplifier without negative feedback (OOS), then we can definitely say that we get a comparator. In order to understand how it works, you can do some simple, but visual experiments. You need a little for this: the operational amplifier itself, a power supply with a voltage of 9 ... 25V, several resistors, a pair of LEDs and a voltmeter (digital multimeter).

The simplest logic probe is assembled from LEDs and resistors. When a positive voltage is applied to the probe input (you can even apply + U), the red LED lights up, and if the input is connected to a common wire, the green one lights up. With the help of such a probe, the output state of the tested operational amplifier becomes clear and understandable. As an experimental "rabbit" any "Rabbit" is suitable for any, not very high quality and expensive...

If you plan to mount wiring in an apartment or a house, then you have a question about its protection from the negative effects of various factors. One of them is damage to cables and wires by rodents.

This issue is especially relevant if it is necessary to lay electrical wiring lines under the floor, in the attic or in those places where the cable (wire) passes openly. Damage to cable lines that run in the ground is also possible. For example, those lines that power the wiring of various auxiliary buildings and structures located on the territory of a private house (bathhouse, garage, warehouse, etc.).

How can I protect the wiring line from rodents? In this case, it all depends on the specific situation. Consider several possible options. The most optimal way to protect the wiring lines of a house or apartment ...

Compact fluorescent lamps are increasingly used every year to illuminate both residential and industrial buildings and structures. Initially, the use of so-called housekeepers was due to the saving of consumed electric energy. Indeed, a compact fluorescent lamp consumes 4-5 times less electrical energy compared to a conventional incandescent lamp. But are they saving money?

Many will answer negatively, since the experience of using fluorescent lamps in everyday life indicates that there is no saving in the family budget. In this case, the fact is that the housekeepers fail, and not having fulfilled the term of work declared by the manufacturer, and accordingly its cost does not pay off by the amount of electricity saved. But, in any case, if it is correct to operate compact fluorescent lamps, they will serve the declared term ...

When you first purchased a garage, one of the issues that needs to be addressed is the power supply to the garage. If the garage was originally connected to the electric network and disconnected due to violation of the contract for the provision of services to the energy supplying company, the process of powering the garage comes down to resolving the issue with the same company regarding re-connecting the garage to the electric network.

Otherwise, that is, if the acquired garage was not connected to electric networks and there is no electrical wiring, then it is necessary to supply the garage with electricity from scratch. In this article, we consider the features of the design and installation of garage wiring, as well as ways to connect the garage to the electrical network. First you need to make a list of electrical receivers that are planned to be used in the garage. Firstly, this is lighting equipment ...