Technical characteristics and connection diagram of a three-phase meter Mercury

On the Russian market, the most common three-phase electricity metering devices are Mercury devices. More advanced devices have many advantages compared to outdated counterparts, in particular - ease of connection and use, long service life and affordable cost.

Types of three-phase electricity meters

Three-phase electricity metering devices have recently been used only at industrial facilities in order to accurately control the consumption of electricity consumed in production. This was facilitated by the advantages of electric meters - increased technical characteristics and reliability. There are three types of three-phase electric meters:

• Direct connection. The peculiarity lies in the direct connection of the device to the electric main.
• Indirect connection. This kind of metering devices is connected using a special transformer on high-voltage connections of 6-10 kV and more.
• Semi-indirect connection. The peculiarity lies in connecting with a transformer in networks up to 60kW.

When installing single-phase metering devices, one connection scheme is used. Three-phase are connected in several ways.

Features of the three-phase electricity meter "Mercury"

In the process of manufacturing various models of the Mercury brand, the developers used the successful practices of other specialists from this industry. Their task was to manufacture a metering device with high measurement accuracy and reliability, equipped with a modern elemental base, as well as developed functionality and low cost.

A feature of electric meters of this brand lies in the circuit design, it has the maximum possible functionality. The project was completed thanks to imported parts from leading manufacturers. As a result, the three-phase Mercury electric meter appeared on the market with the following advantages:

• compact dimensions and light weight;
• low measurement error;
• durability and reliability in operation;
• the ability to connect to a centralized system;

Manufacturer's warranty is provided.

Specifications

All electric meters are divided into electronic and induction models. The difference between mechanical devices in less high accuracy and reliability.

Modern electric meters have additional functionality that allows you to not only keep track of the consumed amount of the resource, but also to control various parameters, as well as monitor the status and performance of the device itself. Data from electronic devices can be read remotely through a software structure. In general, Mercury metering devices have the following technical features:

• Extended operating temperature range.
• In case of faults in the connection of the current series, the probability of theft of electricity is excluded.
• Technological resource by type of accuracy.
• There is a manual and automatic reading mode.
• The device itself consumes a very small amount of electricity.

Different interfaces allow the device to be operated in an automated system for commercial accounting of the consumed resource.

Functionality

The three-phase counter "Mercury" is able to perform the following functions:

• Manual control of power parameters.
• Accounting, recording and display of all information on the built-in display, the possibility of their remote transmission.
• The ability to track the characteristics of the electrical network with fixing deviations.
• Regulation of tariffs for tariffs.
• Record main events in the device memory.

Metering devices manufactured by the Mercury company fully comply with the requirements of state standards.

Accounting parameters, their measurement and fixing

It is easy to take readings from three-phase electricity meters, since all the necessary information is displayed on the built-in LCD.

First you need to prepare a blank sheet and pen, to take readings pay attention to the indication, which indicates the variety of the displayed data. If the meter is two-tariff, first readings under the marking T1 are daytime, and then T2 is nighttime. The cost of electricity consumed at night is less. The number of kilowatts is multiplied by the cost of 1 kilowatt of the resource, the data is added up. It is required to purchase special receipts for two-tariff metering devices, where there is enough graph to fill in all the information.

For ease of use, manufacturers have also developed software that facilitates the task of processing and transmitting information. The launch is carried out when connected to a computer or phone on a Windows platform.

Connection diagram of a three-phase meter "Mercury"

The choice of the most suitable connection scheme depends on the type of monitoring meter. Three-phase can operate in standard electric networks of 220V.

For direct-flow type equipment, the transmitted current strength should not exceed 100 A. As a result, this causes a limitation of the operation of the device by power, which reaches no more than 60 kW. The device is equipped with terminal contacts, their holes are designed to connect wires with a small cross section. As a rule, the cross section of such wiring varies within 25 mm.kv.

Three-phase electronic meters have a standard wiring diagram, which is indicated on the back cover of the device. Installation does not cause any difficulties.

The average operational life of Mercury brand equipment is 15 years. When buying, it is important to make sure that you have a warranty card among the accompanying documentation.