UM1554 datasheet(5/34 Pages) STMICROELECTRONICS

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UM1554

Features

Doc ID 023381 Rev 1

5/34

Features

The single-phase energy meter has the following features:

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Low cost single-phase energy meter solution

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Supports IEC 61036:1996 + A1: 2000, static meter for active energy classes 1 for

Ib=10 A

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Less than 4 VA power consumption for voltage circuit at reference voltage

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Less than 1 VA power consumption for current circuit at reference basic current

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Multiple tamper detection: earth, neutral missing, reverse, case tamper, magnetic

tamper detection

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Case tamper detection in power-down also

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Detects, signals and continues to measure accurately under tamper condition

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Rechargeable battery is available onboard for showing LCD parameters in case of

power-down mode

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Active energy pulse output 1600 impulses/kWh

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Software based auto-calibration without the need of reference meter, only reference

source is required

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Microcontroller in-built RTC for date and time display

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Microcontroller STM8L152C6T6 is responsible for all the data management, display

and power management

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STPM metering IC with 1st order sigma-delta ADC for energy measurements.

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Single point and fast calibration of STPM for class 1 meter

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External EEPROM used to store calibration parameters, tampering information,

cumulative energy, MD and power factor (PF) data

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Active power, current, voltage, power factor and line frequency measurements

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Numeric display precision (except cumulative energy): 5+2 digits

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Numeric display precision for cumulative energy: 5+1 digits

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Energy EEPROM log precision: 0.01 kWh.

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