45
Connection of the current transformer to the charger
Step
Description
Picture
2
The signals of the current transformer
must be connected as in the following:
1-phase:
only one transformer, TA1, with the
following connections:
TA1 white cable - pin (1) CT1_H
TA1 black cable - pin (2) CT1_L
3-phase:
three transformers, TA1, TA2, TA3, with
the following connections:
TA1 white cable - pin (1) CT1_H
TA1 black cable - pin (2) CT1_L
TA2 white cable - pin (3) CT2_H
TA2 black cable - pin (4) CT2_L
TA3 white cable - pin (5) CT3_H
TA3 black cable - pin (6) CT3_L
check that the transformer is
mounted in the correct direction. The
arrow must have the same direction of
the flowing current (see picture)
3
After the external meter is connected,
the charger must be closed again with
its covers. This is extremely important
for functional and, mainly, for safety
reasons.
8.2.17
MASTER
–
SLAVE connection
In this type of connection two chargers share, in a balanced way, the available power between
them and the rest of the loads in the system.
One of the chargers is identified as the MASTER and it is connected to the external power meter,
which measures the total power flow in the system.
The other charger, defined as the SLAVE, is connected to the MASTER through the ethernet
cable and receives by the MASTER the instruction about how the power must be shared