WARNING! Do not install the CT in a panel where they exceed 75% of the wiring space of
any cross-sectional area within the panel, or refer to local standards for guidance.
a. Make sure that the AC mains wire(s) are de-energised until you have secured the CT wires in the
terminal blocks.
b. Take care to identify L1, L2 and L3.
c. Connect the white wire from Line 1 to “I1•” and the blue wire to “I1”.
d. Connect the white wire from Line 2 to “I2•” and the blue wire to “I2”.
e. Connect the white wire from Line 3 to “I3•” and the blue wire to “I3”.
f. Open and clamp the CT on the main supply lines (Line 1, Line 2, and Line 3, if used). When the
consumption CT is on the line (active) conductor, the arrow should point toward the load (away
from the grid).
g. Tighten all connections to 0.56 Nm.
NOTE: Only run active conductors through the CT. The CT can monitor multiple active
conductors.
Extend CT Leads, If Needed
If needed, an electrician may extend the CT leads using the following guidance:
WARNING! To extend the CT leads, the electrician must use appropriately rated, 0.75 mm
2
to 2.5 mm
2
, twisted pair wire and install it in accordance with all applicable electrical codes.
The electrician may add as much as three ohms round trip resistance to the CT or up to 1.5 ohms per
wire. For reference, the following maximum lengths at 75° C by gauge are:
64 meters of 0.75 mm
2
7-strand Cu = 1.5 ohms
85 meters of 1 mm
2
7-strand Cu = 1.5 ohms
128 meters of 1.5 mm
2
7-strand Cu = 1.5 ohms
213 meters of 2.5 mm
2
7-strand Cu = 1.5 ohms
Resistance figures may not be appropriate for all geographies or installation conditions. A qualified
electrician must determine the wire gauge and type to obtain a maximum round trip resistance of three
ohms.
Select wire that is code type and rated for voltage and temperature for the specific application.
Mechanically protect the wires in a code type conduit or raceway. Use certified connectors for splices
and insulate splices from one another and from the raceway, conduit, or junction box, if metallic.
Buried wires must be certified for direct burial and follow the code for installation. Do not bury splices
unless in a certified junction box rated for the application, and use a certified moisture resistant
connection method.
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