UM0402 datasheet(6/35 Pages) STMICROELECTRONICS

6 / 35 page

Overview

UM0402

6/35

1.4

Multi tariff meter features

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Cost-effective and flexible, based on STPM14

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Fulfils class 1 accuracy for Ib=5A and Imax=80A according to IEC 61036:1996 + A1:

2000, Static meter for active energy (classes 1 and 2)

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Operating Voltage range 220V ±20%

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Continuously detects and displays No load condition, Reverse direction and fraud &

case Tamper conditions

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Configurable number of tariffs (1 to 4) and Maximum demand Type (day type, one

month type or three month type)

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Accumulated data for whole meter life (Total kWh consumption, Average MDs, Total

number of Tariffs, Tariff time slots, consumption under different tariff rates, power failure

date/time)

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Data for last 12 months (Consumption under Tamper mode for each month, First/last

Case/fraud Tamper Date/time, total Tamper time and power failure accumulating time

for each month)

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Data for Absolute Maximum Demand (Absolute MD, Date/Time) according toType of

MD requested

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SW LCD driver for 24X4 segments LCD glass with contrast control

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RTC with SPI exists for real Date/Time

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EEPROM with SPI for storing 256 Kbit of data

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Case tamper detection in power down also

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External switch to see all the data stored into EEPROM sequentially even when AC

power is not available

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Battery backup to detect tampering and see all the parameters stored in EEPROM

during power down also

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Single point and fast calibration of STPM14 for Class 1 meter

1.5

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