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Three-phase Four-wire Cost-control PLC Intelligent Meter

Overview

Smart MTV Series three-phase four-wire cost-control intelligent meter (wireless/remote/in-built switch) is composed of measuring unit, data-processing unit and communication, and has functions of electric energy metering, data processing, real-time monitoring, automatic control, information interaction and etc. The large scale integration technology and SMT manufacturing process, as well as the selected international brand key component with long life, highly improve the reliability and service life of the product. With large screen LCD displaying data, the product has high accuracy and reliability.

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Specification

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  1. Voltage specifications: 3×57.7/100V，3×100V，3×220/380V.

  2. Current specifications: the reference currents (In) are 0.3A, 1.5A, 5A, 10A, 20A. The maximum current is not less than 4 times of the reference current.

  3. Reference frequency: 50Hz or 60Hz.

 

Electrical Performance Index

  • 3.1 Environmental conditions

  • Reference temperature 

  • The reference temperature is 23℃ and the reference humidity ranges from 40ï¼… to 60ï¼….

  • Temperature and humidity

  • Temperature range:

  1. Installation way: Indoor type and Outdoor type

  2. Operating range : -10℃～55℃ and -25℃～70℃

  3. Limit range of operation: -25℃～70℃

  4. Limit range for storage and transportation: 25℃～75℃

  • Relative humidity:

  1. Annual mean: ï¼œ75ï¼…

  • 30 days (These days distribute in the year in a natural way.): 95ï¼…

  • Occasionally appear in other days: 85ï¼…

  • Voltage range.

 

  1. Operation range: 0.8Un～1.2Un

  2. Limit range of operation: 0.0Un～1.2Un

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  • Error:

  1. Active class 0.5S conforms to the provisions of IEC 62053-22; Reactive class 2 conforms to the provisions of IEC 62053-23. And the error data is within 60% of the factory tolerance limit. 

  2. Within the rated voltage and the rated frequency and under the condition of cos=1.0, after the load current rising up to 0.001In, the meter can output metering pulse, and the indicator light representing the output of electric energy will flash.

  • Creeping

When there is no current in the current loop and 115% Un are applied to the voltage circuit, the meter can output no more than 1 pulse within the 10-fold time of generating a pulse under the starting current. 

  • Demand indication error

Within the rated voltage and the rated frequency and under the condition of cos=1.0, if I=0.1In～Imax, the demand indication error (%) will be not more than the stipulated level of accuracy values.

  • Clock accuracy

At the reference temperature (23℃) and within the range of operating voltage, the accuracy of the internal clock will be better than 0.5s/d. Within the range of operating temperature (25℃～+70℃), under the condition of AC power supply and DC battery supply, the accuracy of the internal clock will be not more than ≤1.0 s/d.

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Brief Introduction
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