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UM1554 Fiches technique(PDF) 23 Page - STMicroelectronics

No de pièce UM1554
Description  This document describes the functioning
PDF  34 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

UM1554 Fiches technique(HTML) 23 Page - STMicroelectronics

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UM1554
Tamper definitions
Doc ID 023381 Rev 1
23/34
Appendix B
Tamper definitions
●
Earth tamper: using earth in place of neutral (load current is passed partially or fully
through earth)
●
Reverse connection: reversal of phase and neutral at mains
●
Neutral missing tamper: when neutral is disconnected, the board is not powered.
During this condition (single-wire conditions), power supply is generated by a CT for
powering up the board.
●
Case tamper: if an attempt is made to open the meter body, the meter logs the
date/time of the meter opening tamper
●
Magnetic tamper: if a magnet is near to the board, it pulls magnetic sensor output IO
low.



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