How many Micro CTs can I put on a given AUX channel?

Up to five (possibly more) Micro CTs may be connected to a single AUX channel. The limitation is that the total measured amperage does not exceed 80A at any one time. Moderately exceeding 80A will not damage the ECM-1240, however it will result in lower than expected readings. Is there anything that can be done to monitor amperage greater than 80A on a given Aux channel? Yes, there are a few options:

  1. Use Micro-100 CTs
  2. Use multiple Micro-40 or Micro-80 CTs and adding an burden resistor.

Both of the above options will extend the maximum Aux channel current to 160A for the total of all CT amps.

Posted in: Loads and Current Transformers (CTs)

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