CIRCUTOR computer PLUS-TF Series - Manual (Page 19)

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All connections are inside electric panel.
Remember that with the unit connected, the terminals may be hazardous to the touch, and
opening the covers or removing elements may provide access to parts that are dangerous to
the touch. The unit must not be used until it is fully installed.
The regulator should be connected to a power supply circuit protected by gl type (IEC 269) or
M type fuses (IEC 127), rated between 0.5 and 2 A. It should be provided with a MCB or
equivalent device to switch off the system from the power supply circuit. Both power supply and
voltage measuring circuits as well as connections to different relays will be wired with cables of
a minimum cross-section of 1 mm2 (AWG 17). The current transformer secondary side
connection line should have a minimum cross section of 2 mm2 (AWG 14) and with a minimum
temperature rating of 60 ºC.
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To connect a Computer plus regulator to a power factor compensation unit, follow these steps:
 Connect the power supply terminals (1 and 2 in Card C) to the control panel's voltage source.
 Connect terminals VL1, VL2, VL3 and the neutral N (if available) to the network's phases and neutral.
 VERY IMPORTANT!
The device considers that phase 1 is the phase connected to the VL1; phase 2 will be that connected
to VL2 and phase 3 that connected to the regulator's VL3. (Cables L1, L2 and L3 of the power supply
connection).
 Connect current transformers T1, T2 and T3 to phases 1, 2 and 3, respectively. If you do not connect
each transformer to the corresponding phase, the “Plug and Play” setting can be used to detect them
automatically. In addition, they can be configured manually with the Connection of Transformers V-I
option in the Setup menu folder.

Make sure that the cables (S1-S2) coming from the secondary connections of the current transformers
are connected to terminals S1-S2 of the Computer plus unit. If you do not connect each transformer to
the corresponding pha
se, the “Plug and Play” setting can be used to detect them automatically. In
addition, they can be configured manually with the Connection of Transformers V-I option in the Setup
menu folder.