10 kilowatt hours. How many watts are in a kilowatt? What is a kilowatt hour? Units of measurement for indicating the power of electrical appliances

Hello, dear readers and guests of the "Notes of an Electrician" website.

It has been a long time since I wrote to the section on electrical engineering. I decided to correct this situation a little and prepared for you a small review article on how many watts are in a kilowatt.

Almost every electrical device (microwave oven, iron, refrigerator, washing machine, electric motor, etc.) on the case or in the passport indicates the power value, which is expressed in watts or kilowatts.

But first, a little history.

Do you know who James Watt is? This is a very famous engineer-inventor from Ireland. This is how he looked.

It is in honor of him that the unit for measuring power is named - Watt. By the way, even before 1882 such a unit did not exist, and power was measured in horsepower. After some time, namely in 1960, the unit "Watt" was introduced into the international system of units (SI).

As electricians, we are more interested in electrical power. According to the formula from physics, it can be seen that power is the energy consumption (J) for a certain time (sec).

Convert watt to kilowatt

Let's move on to an example. The power of my washing machine is 2100 (W). How many kilowatts is it?

To convert watts to kilowatts, you need to divide the value of 2100 (W) by 1000, we get 2.1 (kW). To explain it even easier, you need to move the comma three characters to the left.

Some more examples:

• 15400 (W) = 15.4 (kW)
• 2800 (W) = 2.8 (kW)
• 700 (W) = 0.7 (kW)
• 32 (W) = 0.032 (kW)
• 5 (W) = 0.005 (kW)
• 0.2 (W) = 0.0002 (kW)

Convert kilowatt to watt

On the electric motor tags, most often the power is indicated not in watts, but in kilowatts.

In this example, the motor power is 0.55 (kW). To convert kilowatts to watts, you need to multiply the value 0.55 (kW) by 1000, we get 550 (W). To explain it even easier, you need to move the comma three characters to the right.

More examples:

• 23 (kW) = 23000 (W)
• 4.2 (kW) = 4200 (W)
• 0.4 (kW) = 400 (W)
• 0.07 (kW) = 70 (W)
• 0.004 (kW) = 4 (W)

The difference between kilowatts and kilowatt hours

In almost every apartment. It counts the power consumed by us and gives the indication in the form of "kilowatt-hour" to the display or the calculating mechanism.

There is no need to confuse these two names - kilowatt and kilowatt-hour, because these are completely different quantities.

I gave the definition of a kilowatt at the beginning of the article. Now let's figure out what a kilowatt hour is. A kilowatt hour is the energy expended (J) in a time equal to one hour.

Let's assume that she has worked for exactly one hour. Thus, the electricity meter will count the consumption as 2100 (W) 1 (hour) = 2100 (Watt hour) = 2.1 (kWh).

And if it is turned on for 5 hours, then the consumption will already be 2100 (W) 5 (hour) = 10500 (Watt hour) or 10.5 (kW hour).

• at a one-part tariff, we multiply 315 (kWh) by 2.95 (rubles / kWh) = 929.25 (rubles)
• at a two-part tariff in the daytime 315 (kWh) by 2.97 (rubles / kWh) = 935.55 (rubles)
• at a two-part rate at night 315 (kWh) by 1.4 (rubles / kWh) = 441 (rubles)

Hence the conclusion suggests itself that all the same, acquiring a two-tariff meter.

P.S. In principle, this is all that I wanted to tell you. If you have any questions for me, then ask them in the comments to this article. Thank you for your attention.

How much money is spent on electricity in an apartment is easy to calculate. You go to the counter and look - and so every month. What is in the apartment? Washing machine, TV, computer and a dozen bulbs.

A completely different song - a private house. It is sometimes impossible to understand where such a figure comes from for a month, even for those who live in the house.

And if you are still a city dweller? If you have only plans to build, and you are afraid that you will not be able to service it?

This is where our calculations "on top" will help you - where does the electricity go in a private house.

The cost of heating with electricity in the house

The most expensive item of expenditure in a private house is the cost if you have heating with an electric boiler. At a cost of 1 kilowatt per hour in the region of 3 rubles, let's calculate how much it will cost.

For simplicity, the calculation will take the area of ​​the house in 100 square meters. And then everyone will be able to calculate how much it will cost him to heat his house with a specific area.

For every 10 square meters of a well-insulated house, you will need 1 kilowatt of electric boiler power. For 100 square meters, you will need a boiler with a minimum capacity of 10 kilowatts.

Electricity consumption 10 kilowatts per hour - the boiler will work continuously. Total 240 kilowatt-hours per day. If you have frosts below -30C for a month, then your electric boiler will consume 7200 kilowatt-hours of electricity. Not weak? More than 7 megawatts per month! That will cost you more than 20 thousand rubles just to heat your home.

However, in practice, such frosts are in central Russia and even in the Urals for no more than 1-2 weeks per winter. Sometimes, in some winters, however, there are prolonged frosty periods, such as, for example, in the winter of 2013.

The rest of the time, when the winter temperature fluctuates between -15C -20C, the boiler works half the time. That is, your approximate cost of heating a house of 100 square meters will be equal to 10 thousand rubles a month.

These are the winter months - December, January and February. In November and March, the boiler will operate only 8 hours a day at full capacity, or it will consume only a third of electricity in stages. This means that in November and March your electricity costs for heating your house will be approximately 6-7 thousand rubles.

In October and April, the cost of heating with electricity will be quite insignificant - 2-3 thousand rubles.

To summarize, the total cost of heating a well-insulated house with an area of ​​100 square meters in central Russia and the Urals will amount to 50-60 thousand rubles for the entire heating season. And the practice of heating with electricity confirms this.

Of course, if you have or are heating your house with a solid fuel boiler, then you can omit these calculations.

The cost of lighting in a private house

If you put energy-saving lamps with an average power of 13-15 watts, which is equivalent to a regular 75 watt lamp, in all the fixtures in your home, then your home lighting costs will fit within reasonable limits.

In winter, lighting works for 10 hours a day, and in summer for 3-5 hours, excluding outdoor lighting. Of course, if you correctly mount outdoor lighting and equip it with light and motion sensors, then outdoor lighting will work no more than indoor lighting.

So, you have a house of 100 square meters, in which you have about 20 15 watt lamps. This is only 300 watts per hour. With an average lighting time of 7 hours (both in winter and summer), this is only 2 kilowatts per day or 60 kilowatts per month.

That is, the cost of lighting in 100 square meters will amount to no more than 200 rubles per month.

The cost of electricity in the kitchen

If you do not have gas, then you will have to cook food on electricity. Modern electric cookers are highly efficient, but they also consume 5 to 7 kilowatts of electricity per hour at full capacity.

The approximate cost of cooking with the help of electricity will be from 300 to 500 rubles per month, regardless of the area of ​​your home.

Other electricity costs in a private house

The circulation pump of the heating system, boiler automation, VOC compressors, televisions, satellite receiver, computers, washing machine, phone chargers are all consumers of electricity in a private house. And they all require kilowatts, albeit a little. You will spend about 200 to 300 rubles a month to maintain these devices.

On the territory of Moscow and the Moscow region, the following types of tariffs apply:

The indicated tariff plans for electricity of Mosenergosbyt are valid from January 1, 2020 in the territory of the city of Moscow and the Moscow region. (RUB / kWh including VAT)

Electricity tariffs presented in the tables below for the population and equivalent categories of consumers on the territory of the city of Moscow and the Moscow region are shown in the ratio RUB / kWh and are divided into two periods: electricity tariffs from January 1, 2020 to June 30, 2020 and electricity tariffs from July 1, 2020 to December 31, 2020.

One-part tariff for electricity in the territory of Moscow, with the exception of Troitsky and Novomoskovsky administrative districts

Tariff for two zones (peak and half-peak) on the territory of Moscow, with the exception of Troitsky and Novomoskovsky administrative districts

Tariff for three zones (peak, half-peak, night) on the territory of Moscow, with the exception of Troitsky and Novomoskovsky administrative districts

Electricity tariffs for the population and equivalent categories of consumers in the Troitsky and Novomoskovsky administrative districts of Moscow for 2020

One-rate tariff for electricity in the Troitsky and Novomoskovsky administrative districts of Moscow

Tariff for two zones (peak and half-peak) in the Troitsky and Novomoskovsky administrative districts of Moscow

Tariff for three zones (peak, half-peak, night) in the Troitsky and Novomoskovsky administrative districts of Moscow

On the official website of Mosenergosbyt, in the tariffs and payment section, three menu items are presented: "Information for the population about payments for electricity taking into account general household needs (ODN)", "Methods of payment for electricity" and "Tariffs", in turn, in the "Tariffs" section there are description of electricity tariffs in effect on the territory of Moscow and the Moscow region, by clicking on the "tariffs" section, you can familiarize yourself with them in more detail to calculate your electricity costs.

Based on this pricing, Mosenergosbyt provides electricity tariffs broken down by rates and zones of the day, based on the individual needs of its subscribers. Distinguish between one-, two- and multi-tariff payment systems. In a multi-tariff system, not only the day and night consumption of electricity is taken into account, but also its peak hours.

Electricity for general household needs (ODN) and its calculation.

In the section "Information for the population about electricity billing taking into account general household needs (ODN)" you can get acquainted with a detailed diagram of electricity consumption in an apartment building.

The rules for the provision of utilities are reflected in the Decree No. 354 of the Government of the Russian Federation of 05/06/2011 (as amended on 02/27/2017) "On the provision of utilities to owners and users of premises in apartment buildings and residential buildings."

In addition to paying for individual electricity consumption, residents need to pay for general household needs (ONE). Such amounts are calculated, accrued and allocated in the payment receipt separately from each other.

Payment for common house electricity in an apartment building is compulsory for everyone, does not depend on whether consumers have individual metering devices (IPU) and is proportional to the area of ​​the premises they occupy.

In the presence of a general house meter, the volume of electricity supplied to the ONE, payable, is calculated by subtracting the total volume of individual consumption in all rooms of the apartment building from the readings of the general house metering device.

If the general house electric meter is not installed, then the calculation of charges is carried out according to the current standards.

Many of us have noticed how the light bulb starts flickering all of a sudden. It would seem that the phenomenon is harmless, but extremely dangerous for household appliances. Voltage drops - one of the key problems for which most household appliances fail long before the manufacturer guarantees it. Why this is happening and how to avoid it, we will figure it out further.

There are many reasons why a power surge may occur. Among them, the most popular are:

• The quality of power lines - rural residents and owners of country houses are at risk, where power grids in most cases are assembled "piece by piece" in the truest sense of the word.
• The presence of powerful consumers of electricity - leads to the fact that the power allocated to the line drops sharply, from which other electrical appliances are not able to work.
• Power outages - an abrupt shutdown is not as dangerous as an abrupt turn on, which can damage all household appliances that were plugged into the network at that time.