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[Multi-user electric energy meter]Multi-user electric energy meter introduces the classification of multi-user electric energy meter
Most of the residential buildings or apartments in China are mainly buildings. A building generally contains several units, and each unit is usually close to ten households, a dozen households, or dozens of households. In view of the above situation, in order to facilitate meter reading and electricity management, some property management departments currently install multiple single-block meters in the stairwell. Such a simple combination results in bulky, unsightly and uneconomical. It is very necessary to design a centralized multi-user all-electronic energy meter with small size, full functions and economical efficiency. This centralized table can be used in one unit or even a building, but it is not a simple combination of multiple single tables.
(1) Electric energy metering unit for each household: It is mainly composed of voltage, current sampling and special electric energy meter chips (such as BL0932B, ADE7755, etc.). Its task is to complete the accumulation and storage of the electricity consumption of each user, and at the same time convert the electricity into corresponding pulses, which are respectively output or sent to the single-chip microcomputer for processing. The household electric energy metering unit is centrally installed on a printed circuit board, and its area is smaller than a cigarette case, one piece per household, and each household is measured separately without affecting each other.
(2) SCM system: It is an intelligent data acquisition, processing and control unit. The whole system is mounted on a printed circuit board with a square of about 200*80mm2. Its task is to receive and store the power of each user, control the public display after processing, display the power (or remaining) of each household in turn, control external communication, and complete meter reading or remote control.
(3) Output part: It mainly includes public display and external communication, control interface, etc. The public display displays the household number and power of each household in turn, and can work continuously for 24 hours. Users can check their respective usage at any time. It is not difficult to see that the above-mentioned centralized multi-user electric energy meter is a high-tech product combining electronic technology, computer technology and communication technology. It has a small size and can accommodate a large number of households (the area of a 24-household centralized multi-user electric energy meter is about 1/3 of the simple centralized installation of a single meter), and at the same time has the function of “one meter for one household”. It is worth mentioning that there is also a type of centralized multi-user electronic energy meter on the market. The sampling is carried out separately for each household, but the electricity consumption calculation of each household is completed by the same chip or single-chip system. . This kind of table does not have the function of “one table for one household” in terms of structure and principle. Another problem is that the calculation of the electricity consumption of each household is completed by the same component, that is, the calculation of the electricity consumption of each household must be queued and waited in a circular manner. This will inevitably cause errors in electricity metering, and the more the number of households, the greater the error.
Multi-user energy meter classification
KD80 multi-user energy meter
Design model: KD 80- XS + YD
KD: Product model T80: Function code XS: Number of three-phase households YD: Number of single-phase households: Extension code.
Note:
1. When the meter is single-phase, the specification of the meter is expressed as: KD80-YD, such as: when the meter is single-phase 6 households, the meter specification It is: KD80-6D;
2. When the meter is three-phase, the meter specification is: KD80-XS, such as: when the meter is three-phase and 6, the meter specification is: KD80 -6S;
3. When the meter is single-phase/three-phase, the specification of the meter is expressed as: KD80-XS+YD, for example, when the household is 3-phase and 3 single-phase For households, the meter specification is: KDT80-3S+3D.
Main technical indicators:
Rated voltage: 3×220/380V;
※Pulse constant: 900imp/kWh;
※ Accuracy class: 1.0;
※Working voltage range: AC180～260V;
※Measuring division: 0.1 degree;
※Data protection: off Data retention after electricity >10 years
※Calibration current: 15 (60) A;
KD85 prepaid multi-user energy meter;
With more than KD80 Features of the user’s electric energy meter;
With prepaid/postpaid function;
The other functions are the same.
Note:
1. When the meter is single-phase, the specification of the meter is expressed as: KD85-YD, such as: when the meter is single-phase 6 households, the meter specification It is: KD85-6D;
2. When the meter is three-phase, the meter specification is: KD85-XS, such as: when the meter is three-phase and 6 households, the meter specification is: KD85 -6S;
3. When the meter is single-phase/three-phase, the specification of the meter is expressed as: KD85-XS+YD, for example, when the household is 3-phase and 3 single-phase For households, the meter specification is: KDT85-3S+3D.
Main technical indicators:
Rated voltage: 3×220/380V;
※Pulse constant: 900imp/kWh;
※ Accuracy class: 1.0;
※Working voltage range: AC180～260V;
※Measuring division: 0.1 degree;
※Data protection: off Data retention after power up>10 years;
※Calibration current: 15 (60) A;
KDT80 KDT85 industrial mutual inductance energy meter.
Note:
1. When the electricity meter is single-phase, the specification of the electricity meter is expressed as: KDT80-YD. It is: KDT80-6D;
2. When the meter is three-phase, the meter specification is: KDT80-XS, such as: when the meter is three-phase and 6, the meter specification is: KDT80 -6S;
3. When the meter is single-phase/three-phase, the specification of the meter is expressed as: KDT80-XS+YD, for example, when the household is 3-phase and 3 single-phase For households, the meter specification is: KDT80-3S+3D.
Main technical indicators:
Rated voltage: 3×220/380V;
※Pulse constant: 5000imp/kWh;
※ Accuracy class: 1.0;
※Working voltage range: AC180～260V;
※Measuring division: 0.1 degree;
※Data protection: off Data retention after electricity >10 years;
※Calibration current: 1.5 (6) A.
