TCI HGA Manual - Manual (Page 9)

9
7) Remove CT shorting bars
• Press “Stop” to turn off unit
• Disconnect power from cabinet
o Turn off the built in door breaker AND
o Turn off the upstream feeder breaker
• Open the cabinet door and remove shorting bars
from CTs connected to TB-1
Warning
Lethal voltages may be present. Wait 5
minutes for DC bus voltage to drop to
safe levels.
Warning
Check for voltage in cabinet with a
DMM before working inside cabinet.
8) Current polarity - 1
• Power up unit
• From Home screen press “Run” to turn on unit
• Press “Status” to navigate to Status screen
• Select “Vline/Iline” screen
• Note: Lightly loaded conditions (less than 20% CT
rating) will not have enough current to
show up on Iline plot
• Check that Phase A to Neutral voltage peak lines
up with Phase A current (use zoom if necessary)
• Check that Phase C to Neutral voltage peak lines
up with Phase C current
• Power system down and check CT installation
location and orientation if Phase A plots differ
significantly from Phase C plots
Warning
Improper operation and damage may
occur if CTs are installed incorrectly.
9) Current Polarity – 2
• Navigate to Status screen
• Navigate to Line/Load status
• Verify that “Volts,” “Current,” “Power,” “I THD,"
and “V THD” match expected values for the
power system
• If they do not, verify CTs are correctly installed
Warning
Improper operation and damage may
occur if CTs are installed incorrectly.