Initial Installation

What direction is right for the CTs

The current transformers (CTs) should be installed with the label facing the load.  But for most users, it doesn’t make any difference.  The meter will report accurate power usage either way.  But for some users, it does make a difference

  1.  If the power comes from three phase transformer, the CTs must be installed properly for the phase matching alarm to work.
  2. For smart meters, positive power (watts) will be reported as negative power and positive accumulated power (kwh) will be reported as negative.