Rockwell Automation 1519 MV DRIVE HARMONIC FILTER PF CORRECTION UNIT - Manual (Page 11)

Chapter
2
1519-5.0 – May 1998
Physical Layout and Component Identification
Component Identification Refer to Figures 2.1 and 2.2 to identify the functional components described in
and Functional Descriptions this section.
Note:
For illustrative purposes, a 5 th harmonic filter with six (6) capacitors is
shown. In a 5 th , 7 th and 11 th configuration, there will be two (2) cabinets as
shown with the 7 th and 11 th filter legs in the right-hand cabinet. Customer load
terminals and low voltage control components are always located in the 5 th
filter-leg cabinet (left-hand side).
Filter Reactor
A three-phase, iron-core reactor with ±5% taps on the inductance is wired in
series with capacitors to create a specific tuned frequency for the filter. Each
winding has a normally closed thermal switch that opens when the temperature
reaches an excessive level.
Filter Capacitor
Single phase, individually fused capacitors are used in combination with a
reactor to tune the filter to a specific frequency. The capacitors also serve the
purpose of providing leading kvar to correct the power factor of the associated
drive.
Current Transformer
Window-type current transformers are used around the conductors feeding
each capacitor. The 5A CT secondary drives a 592 thermal overload relay and
an SMP-3 relay.
SMP-3 Overload Relay
Only the phase loss function of this relay is used to detect a blown fuse on a
capacitor. A blown fuse on a capacitor generally indicates that the associated
capacitor has failed in a short-circuit condition. The overload setting on this
relay is intentionally set high since the overload function is not used. The
SMP-3 relay is a manually reset device.
1519-IN050B-EN-P June 2013