6.
Perform an Auto CT-detection (300-29) if the
following conditions are met: the CTs are installed
on the PCC side (towards the transformer), CTs
do not use sum transformers, the filter is not
supplied through a transformer, and the filter is
>10% of the CT primary.
7.
Check the filter parameters according to CT
installation in the following parameters: Primary
Rating (
300-20 CT Primary Rating
), Sequence
(
300-24 CT Sequence
), Polarity (
300-25 CT Polarity
).
8.
Mount the CT short at all three CT inputs on the
CT input terminal (factory pre-mounted).
9.
Provide the active filter with a run command.
10.
Check that the filter current shown on the LCP is
lower than 15% of the nominal filter current. If
higher, conduct a hardware fault inspection.
11.
Stop the active filter and remove all three CT
short lugs.
12.
Check the filter parameters according to
application requirements in the following
parameters: Priority (
300-01 Compensation Priority
),
Harmonic Selection Mode (
300-00 Harmonic
Cancellation Mode
and
300-30 Compensation
Points
), and Cos fi Reference (
300-35 Cos-phi
Reference
).
13.
Provide the active filter with a run command.
14.
Monitor that the total harmonic current and
voltage distortion is reduced. If not, check CT
input/installation for faults or configuration errors.
15.
Copy parameter settings to the LCP memory
0-50 LCP Copy
for backup.
Test Procedures
VLT Advanced Active Filter AAF006 D and E Frames Service Manual
MG90Z122 - VLT
®
is a registered Danfoss trademark
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