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6
iSaver Controller mains
current /iSaver current
reading incorrect
Potentially wrong CT settings on
Controller.
CT faulty or potentially failed
Check - controller Primary Current
program settings and correct, i.e if
400/5A CT’s are used, insert CT
value in controller as 400A)
Check the CT output current corre-
sponding to primary. It should be very
close to 5 Amps.
If output current is not correct as
per CT value, the CT is defective and
should be replaced.
7
iSaver Controller indi-
cates negative mains
KW reading
CT polarity reverse connection
incorrect CT wiring
Conduct a continuity check to ensure
that the CT connections are as per
installation procedure above
8
Power Factor is low with
the following conditions:
• NO Alarm
• NO banks are ON
Very low reactive load. If the
connected load is lower than 70% value
of first Capacitor bank value, the first
bank will not turn ON.
Check the 1st capacitor bank value in
program mode.
In our current design, Capacitor cor-
rection steps are auto activated when
Measured kVAr is more than 70% of
the minimum step.
No corrective action required.
Check all three CT outputs. If any
CT indicates wrong value, correct /
change the corresponding CT.
9
Capacitor banks are
ON
, but no PF improve-
ment / change shown
by controller. (External
mains CT type)
Mains CT may be incorrectly installed.
Check and verify installation procedure.
Mains CT should be placed on the
mains side. Check and verify installa-
tion procedure. Refer to the connec-
tion diagram.
10
iSaver Controller show-
ing erratic reading of
kW, kVAr & PF.
This is caused by CT phase reversal or
polarity reversal.
Check the CT connection and
correct it as per connection diagram
and procedure. Always ensure
the corresponding phase of CT is
connected to corresponding terminals
with correct polarity.
