Danfoss VLT AAF006 Operating Instructions Manual page 28

Electrical Installation
PCC1
AAF
Illustration 4.15 CTs Do Not Measure Capacitor Current
For installations where the CT connection point can be
moved, the configuration shown in Illustration 4.15 is also
possible. In some retrofit applications, summation CTs are
needed to ensure that the capacitor current is not
measured.
Summation CTs can also be used to subtract 2 signals from
each other and so subtract the capacitor bank corrected
current from the total current.
NOTICE
Use summation CTs with an accuracy of 0.5% of better.
MG90V302
Operating Instructions
PCC1
M M
Illustration 4.16 Capacitor Bank Mounted on PCC with CTs
Ensuring that Capacitor Corrected Current is not Measured.
Danfoss A/S © 09/2014 All rights reserved.
AAF
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