Modern life can not be imagined without electricity. We need it for the operation of electrical appliances - multivaracters , vacuum cleaners, refrigerators , televisions, lighting our homes and apartments and much more. And to account for electricity consumption, we just need a special device. For example, a three-phase electricity meter.
What is the difference between a three-phase meter and a single-phase meter?
A single-phase electricity metering device is a special device that is installed only in a two-wire network with alternating current and voltage of 220 V. But three-phase meters can help with taking into account in three- and four-wire networks with a frequency of 50 Hz, alternating current and voltage of 380 V .
Single-phase meters are usually installed in residential buildings and apartments, in administrative and office buildings, in retail outlets, garages, etc. They are arranged very simply, it is not difficult to remove their testimony from them.
Three-phase multi-tariff electricity meters are more complex in the device and more accurate. They are needed at sites with increased complexity - industrial plants, facilities with large electricity consumption, enterprises.
On the question of whether to buy and install a three-phase meter with a single-phase network, it can be answered that there is a probability that with a short circuit due to a higher voltage, the electric shock will be stronger. In addition, its connection is more troublesome, not to mention that for a start you will need to get permission from the energy sales service for this.
Installation of a three-phase meter in a residential building is justified only if its area exceeds 100 squares, and when you plan to use especially powerful devices.
Advantages of three-phase meters
Among the obvious advantages of these complex devices:
- low own power consumption;
- high margin of accuracy;
- resistance to voltage drops and power outages;
- light indicators of operation;
- telemetry output;
- lack of self-propelled gun;
- recording in the log of overload events, self-diagnostics, unauthorized access attempts;
- resistance to mechanical and climatic influences, radio-frequency electromagnetic field, impulse noise and electrostatic discharges;
- possibility to install the device in the domestic sector, residential premises, structures, administrative buildings, garages and cottages, as well as in the manufacturing sector - at large industrial enterprises, in trade and service enterprises.
How to use three-phase electricity meters?
If you still installed a three-phase electricity meter, you need to find out how to take off the testimony. You can do this as an employee of the energy saving service, so you can do it yourself.
So, you need a sheet of paper, a pencil, a calculator and an instruction for the model of your counter. The latter you need in order to determine the specific type of device. Today they are electronic and induction.
Examine the counter and determine whether it is four-digit or three-digit. In the first case, the maximum figure is 10 000 kW / h, in the second - 1000 kW / h. After reaching these marks, the readings are reset to zero and the count starts from zero.
Next, you will need to compare the figures for the previous month. Write out the current testimony and subtract past from them. You will receive power consumption for the period since the last payment. Remember to write down the testimony on a piece of paper.
It remains to multiply the readings of the three-phase electricity meter by the current tariff. With an independent removal of indicators, save receipts for payment, so that later there are no questions and problems.