Single-phase meter is a special device, installed to account for electricity in a two-wire network with alternating current, where the standard voltage is 220 V.
Types of single-phase meters
Devices are divided into:
- single-phase single-rate meter - one tariff for electricity metering is applied during the day;
- single-phase two-tariff meter - within two days two tariffs are applied depending on the time interval - day and night.
Connecting a single-phase meter
Before connecting a single-phase meter, you will need to familiarize yourself with the circuit that is contained in the operating instructions, as well as on the back of the terminal cover.
The terminal block contains 4 contacts, namely:
- input phase to an apartment or home from an external network;
- exit phase inside the apartment or house;
- zero input to an apartment or home from an external network;
- exit zero inside the apartment or at home.
Before the process is disconnected machine, switch or plugs. In case the input cable arrives at the meter, disconnect the line. Wires are connected to the contacts of a single-phase meter in the above sequence.
Single-phase or three-phase meter for an apartment
The three-phase meter differs in that it is installed in three-wire or four-wire networks with alternating current, the standard voltage is 380 V.
Single-phase and three-phase meters have different applications:
- Single-phase meters are installed in apartments, residential and office buildings, in cottages, in garages. They are simple and convenient to use, you can easily take readings from them;
- three-phase meters are installed in industrial enterprises and
in buildings where a large amount of electrical energy is expected. Their device is much more complicated than in single-phase devices, but their measurements are much more accurate.
Three-phase meters can be connected to a single-phase network. If you consider the question of which counter is better to connect for an apartment - single-phase or three-phase, it is recommended to stop your choice on the first. A three-phase device is much more powerful and requires more distribution current. In addition, it has a higher voltage and therefore is much more dangerous in the event of a short circuit.
Thus, you will be able to choose the required type of single-phase meter for your apartment.