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Installation of current transformers
• Install the current transformers on all three phase conductors. Current transformers should
be installed between incoming power and EnergyHub. See diagram under section 5.
• Make sure that all current transformers have been closed properly. If they are open,
calibration will fail.
• EnergyHub contains an automatic calibration function which ensures the function of each
transformer regarding phase order and current direction. The calibration ensures correct
functionality for current equalization and measurements.
• Adjust the cable length and connect them to the connector as shown in the picture
below. Note the order of the phase conductor.
Control of current transformers:
•
Notes: It is important that the current transformers are completely sealed around the
cable. If they are not closed properly, the measurements may be incorrect.
• To ensure correct connection, check the resistance between the pairs: white-red, blue-
black and green-yellow. All pairs should have approximately the same resistance. If any
of the pairs deviate or do not have contact, there may be a failure with the connection.
Make sure that the connector and all current transformers are closed.
4
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