Before panel is powered up for the first time
1. Panel Wiring Check
Ensure that all connections in the panel is tightened properly
and there are no loose connections. Also ensure that the
wiring is done as per the wiring diagram.
2. Power Wiring Check
Ensure that the power cables are connected properly from the
Panel I/C to the feeder I/C or the transformer bushings. The
connection has to be after the Load Feed back CT looking from
the Transformer side.
Ensure that the Bus Bars and/or Lugs are clean and free of
Dust, Corrosion or Oxidation on the contact sides so that good
electrical connection is maintained. The surface area should be
flat so as to get maximum contact area.
If required Clean the Bus Bars and/ or Lugs by rubbing it with
Commissioning Instructions
Power Factor Controller APFC 06
- 28 -
If required Clean the Bus Bars and/ or Lugs by rubbing it with
Polish Paper to remove the oxidation layer. Provide contact
paste in between the contacts surfaces.
Not performing this, can result into a weaker source point for
Capacitor charging during Step on and this can generate
undesirable Noise which can hamper the performance of
equipment installed in the capacitor panel.
3. Load Feed Back CT connection
Ensure that the load feed back CT connections are done
properly. Confirm that correct phase CT is connected with the
correct phase input terminals.
CT connections to be done carefully so as to ensure that the
wire does not get open and there is no loose connection.
Loose connection or open CT secondary can result in very high
voltages getting developed in the circuit which can damage
the CT and also produce high levels of noise in the system.
