The three-phase counter Mercury 230 is a device of new release. This device has telemetry outputs and a special interface designed for information exchange. An electronic seal is installed on the device, the device can automatically diagnose various malfunctions. The manufacturer of electric meters is the company "NPK Incotex".
Content
Device description
A direct-flow meter Mercury 230 is installed to account for electricity in three-wire and four-wire networks. The device can be connected either by direct or transformer method. If a transformer is connected to the device, then it will be possible to take into account electricity at objects with a high load.
The device, which has three phases, has a liquid crystal display. This screen displays data in kilowatt-hours. The display has 8 digits. The first 6 digits show integer values of kWh, the last 2 - decimal places, hundredths of kWh.The error that exists in the readings of this device is 1.0. Devices are installed indoors, where the air temperature can be -40 ... + 55ºC.
If the device is connected through a transformer, then it is possible to measure a current greater than that for which the device is calculated. Counters are mounted in the domestic and industrial sectors. Household appliances are installed in residential buildings. Industrial appliances are used in the industrial sector, in businesses, factories and plants. Counters are induction and electronic. Electronic ones have a high quality certificate, are more accurate, they do not have rotating parts and convert the signal that comes from the measuring elements.
Specifications
The electronic counter Mercury 230 differs in the increased accuracy and high reliability. The smallest operating time is 150 thousand hours. The service life of the apparatus is 30 years. The terms of verification of electric meters (calibration interval) are 10 years. The warranty period is 3 years from the date of manufacture.
Specifications:
- The rated current for the transformer connection is 5 A.
- The base current for direct connection of the device is 5 A or 10 A.
- The highest current strength is 60 A.
- The phase voltage indicator is 230 V.
- Frequency - 50 Hz.
- 2 pulse output modes: basic, verification.
- The limit of permissible error of the device refers to accuracy class 1.
- Dimensions, dimensions: 258x170x74 mm.
When there is no current in the series circuit, the instrument's test output for measuring active and reactive energy does not produce more than one pulse per 10 minutes. These devices are highly durable and reliable. Previously, they were installed at manufacturing enterprises. Now they are often used when wiring electricity in country houses. This is due to the presence of a large number of household appliances, which require a high power supply.
Basic and advanced features
Now electric meters, in addition to the main function - electricity metering, have various additional properties, with the help of which it is permissible to control some of the characteristics of the electrical network and the modes of the device itself. You can take data from this device not only at the place of operation, but also remotely through some types of interface. The Mercury two-tariff meter is a device that has enhanced capabilities.
Standard connection options for a three-phase meter Mercury 230:
- Measurement of electricity data, their storage and visualization on the display for such a time interval: from the last reset, for 24 hours, for 30 days, for a year.
- The device can take into account the current according to two tariff plans for 16 time zones.
- The device can be programmed every month for a new tariff.
The device records the following characteristics:
- instant power calculation;
- determination of potential difference;
- definition of current by phases;
- network frequency indicator;
- power in different phases and total.
The device has maximum protection. If the limit is exceeded, the device notes this, the exact time when the excess occurred is also indicated. The digital output allows you to control the load.
The machine has an event log. It contains the following indicators:
- the time of connecting the device to the network and disconnecting from it;
- phase accounting;
- adjustment of the tariff schedule;
- accounting for the opening of the counter;
- exceeding the limit.
Consider additional features of the device. The counter has additional functions:
- electricity metering in forward and reverse directions;
- it is possible to transfer data on the consumption of electricity for each phase;
- the presence of an archive of power data with an interval of 1 to 45 minutes;
- the archive data storage period is 85 days;
- the highest indicator of morning and evening power;
- accounting for losses;
- accounting for magnetic impact with data recording in a special journal;
- power quality control.
Wiring diagram
Consider how to connect the device. You can connect the meter according to different schemes, in which current transformers will be used as a data source. Here is a connection diagram for the Mercury 230 meter. The most common is a ten-wire connection diagram for the device. Its advantage is the presence of power circuits and measuring instruments. The disadvantage is a large number of wires.
The sequence of connecting the meter and transformer:
- terminal 1 - input A;
- terminal 2 - input of the end of the measuring winding A;
- terminal 3 - output A;
- terminal 4 - input B;
- terminal 5 - input for the end of the measurement winding B;
- terminal 6 - output B;
- terminal 7 - input C;
- terminal 8 - winding termination input C;
- terminal 9 - output C;
- terminal 10 - zero phase input;
- terminal 11 - zero phase on the voltage side.
To install the meter in a break in the transformer circuit, use terminals L1 and L2.You can connect the meter using a semi-indirect circuit. In this case, the current transformers are connected to a star. Then the installation of the device is facilitated and less wires are needed. The accuracy and quality of the data does not deteriorate.
A seven-wire method for connecting a TT is also used. Its disadvantage is the lack of galvanic isolation of circuits. Such a scheme is considered dangerous to use and is now almost never used.
Connecting an electric meter Mercury 230 has much in common with installing a single-phase device. But there are many differences in the installation of the installation. The connection diagram is available on the meter body, on the reverse side of the cover.
During installation, the color sequence must be observed. Even wire numbers correspond to the load, odd wire numbers to the input. Three-phase multi-tariff meter connection schemes are used.
When the meter is connected to three-phase consumers, the process is carried out through current transformers. This scheme makes it possible to reduce the cost of electricity and increase the reliability of its supply. Direct-on meters do not exceed 100 A. This is due to the limitation of the conductor dimensions. The higher the current, the larger the cross section of the wire is needed to pass it. Such limitations are eliminated by current transformers.
Consider the connection diagram of the meter through the test terminal box: the terminals in the block are designated by the letters A, B, C. A wire comes to these terminals, which is connected to the 380 V power buses, and then goes to the meter through jumpers.
If necessary, the jumpers are untwisted, shifted, and the chain is broken.This can remove the mains voltage and ensure the safe operation of the device connected to the test box. ICC has a protective cover and a sealing device, a screw with a hole. The installation of the seal is carried out together with the installation of the meter.
Consider how to take readings of the electricity meter. The device has a 6-digit dial. It is necessary to write out all the numbers up to the decimal point. To calculate the energy consumption for the month, it is necessary to subtract from the new readings those that were last month.
Let's find out how to take readings from a multi-tariff meter (article Mercury 230 ART-01). To do this, you need to write down the following data: T1 - current consumption during the day, T2 - current consumption at night. Before writing data, you need to make sure that the machine is in the ready mode.
There should be a line near mark A. If not, then press the right button. Then press the Enter button. In this case, the display will show the current consumption data for the day T1. Press Enter a second time and overwrite the value of T2 (at night).
Modifications
There are such modifications of Mercury counters:
- Single tariff three-phase, multi-tariff and multifunctional: Mercury 230 ART, Mercury 231 AT.
- Three-phase active and reactive electrical energy single tariff, article: Mercury 230 AR.
- Three-phase active energy single tariff: Mercury 230 AM, Mercury 231 AM.
- Single-phase active energy single-tariff and multi-tariff: Mercury 200, Mercury 202, Mercury 201.
The SIKON controller is installed in Mercury meters with active and reactive energy with an internal rater, the devices can be bidirectional or unidirectional.
