LEGRAND Alpes Technologies ALPIMATIC/BX Guide D'installation page 44

C – CHECKING THE CT POSITION
If the controller reads the cos φ incorrectly, you need to monitor the CT position.
1 / Check it is positioned correctly on phase L1 upstream of all the loads to be compensated.
2 / Using a voltmeter, check that the voltage is zero between the mains phase L1 on which
you have installed the CT and the capacitor bank phase L1.
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Refer to pages 39 and 40 for more information.
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