Table of Contents
Advertisement
Input protection:
• The controller has five leads that are color coded and
labeled to the appropriate phases and ground connection.
All phase (ungrounded) connections should be protected
by a 3 amp fuse or circuit breaker that is appropriate for the
applied voltage and available short circuit rating. (Example:
a type CC fuse rated at 3 Amp (Time‐Delay) and good for
application on up to a 200 kAIC system at 480 volts).
Conductors and field wiring:
• Where applicable, "connect 14 AWG min., 600 V min.
insulated wiring for Line voltages and Neutral to the
appropriate location in the breaker panel, in accordance
with all national and local electrical codes".
• Connector torque rating for wiring terminals is 5 IN‐LBS
Disconnecting Device:
A disconnecting device such as a switch or circuit breaker is
required in case of an emergency.
• The switch or circuit breaker must be marked as the
disconnecting device for the meter.
• It is recommended that the meter be mounted near the
disconnecting device in an area with adequate ventilation.
• The disconnect should not be positioned in a manner that
makes it difficult to operate the disconnecting device.
2
To reduce risk of electric shock, always open or disconnect the
circuit from the power distribution system of a building before
installing or servicing current transformers.
CT Installation:
• The CTs used with the SEM3 metering system are specifically
designed and rated for use with the system. Use of other CTs
can be damaging to SEM3 components and cause hazardous
situations. All the CTs used with this system are in compliance with
the most up‐to‐date safety standards. Use only UL Listed Energy
Monitor Current Transformers, evaluated and approved for SEM3
application. Size CT primary rating with the load to be measured.
The CT primary rating should be equal to or greater than the load.
SEM3 Solid Core CTs
50:0.1 Solid Core CT ‐ US2:SEM3SCCT50
125:0.1 Solid Core CT ‐ US2:SEM3SCCT125
250:0.1 Solid Core CT ‐ US2:SEM3SCCT250
400:0.1 Solid Core CT ‐ US2:SEM3SCCT400
600:0.1 Solid Core CT ‐ US2:SEM3SCCT600
800:0.1 Solid Core CT ‐ US2:SEM3SCCT800
1200:0.1 Solid Core CT ‐ US2:SEM3SCCT1200
Siemens approved UL listed energy Monitoring Current
Transformers other than the one listed here may also be used
with the SEM3 System.
All CTs should be securly fastened within the gear such that
they will not slide down to live terminals and to protect against
damage.
• In accordance with NEC, CTs may not be installed in any panel
board where they exceed 75% of the wiring space of any cross
sectional area.
Advertisement
Table of Contents
