Siemens SEM3 Quick Reference Manual

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DANGER
!
Hazardous Voltage.
Will cause death or serious injury.
Turn off and lock out all power before working on
this equipment.
Installation and maintenance of the SEM3 metering system
should only be performed by qualified, competent personnel
that have appropriate training and experience with high
voltage and current devices. The meter must be installed in
accordance with all local and national electrical codes.
Installation
If the SEM3 equipment is used in a manner not specified by
Siemens, the protection provided by the equipment may be
impaired.
• During normal operation of the SEM3 meter, hazardous
voltages are present on its voltage leads, and throughout
the connected potential transformer (PT), digital (status)
input, control power and external I/O circuits. PT circuits
are capable of generating lethal voltages and currents with
their primary circuit energized. Follow standard safety
precautions while performing any installation or service
work (i.e. removing PT fuses).
• The voltage leads to the meter should not be user‐accessible
after installation.
• Do not use digital output devices for primary protection
functions. These include applications where the devices
SEM3™ ‐ Embedded Micro
Metering Module™
Quick Reference Guide and
Installation Instructions
perform energy limiting functions or provide protection of
people from injury. Do not use the SEM3 in situations where
failure of the devices can cause injury or death, or cause
sufficient energy to be released that can start a fire. The
meter can be used for energy management functions.
• Do not HIPOT/Dielectric test the digital (status) inputs, digital
outputs, or communications terminals. Refer to the label on
the SEM3 meter for the maximum voltage level the device
can withstand.
• The SEM3 metering system offers a range of hardware
options that affect input ratings. Use only parts and
assemblies that are made specifically for use with the SEM3
system. Failure to do so could permanently damage the
meter. This document provides installation instructions
applicable to each hardware option.
For more detailed installation information refer to full SEM3
Manuals available at usa.siemens.com/sem3.
Environmental ratings:
• Temperature to 14°F to 149°F (‐10°C to 65°C)
• Measurement Category III (CAT III)
• Mains Supply Voltage Fluctuations up to 10% less than
nominal low range the mains supply and 10% more than
nominal high range of mains power supply
• CT Overvoltage Category IV (Cat IV)
usa.siemens.com/SEM3