AN2167 Datasheet, PDF (1/5 Pages) STMicroelectronics – Using the STPM01 with a shunt current sensor

AN2167
Application note
Using the STPM01 with a shunt current sensor
Note:
Introduction
This document describes how a shunt current sensor can be used with the STPM01
metering device in single-phase metering applications without tamper detection.
Special considerations must be taken into account when the shunt is designed:
■ The current density must be kept constant
■ The power dissipation must be reduced, as it can influence the ambient temperature
within the meter housing. In the event of large current overloads, this can become an
explosion hazard.
Special safety precautions must be followed while the meter is connected to the power line
and opened. The ground plane of the meter is at a high voltage level because the shunt has
to measure the current flow through a hot conductor without any galvanic isolation. This is a
safety hazard for the operators and can destroy the connected equipment.
For more information on the STPM01, refer to the full datasheet.
October 2008
Rev 2
1/5
www.st.com