Table of Contents
Advertisement
I N S TA L L AT I O N
8.6 Setting voltage correction factors
The GridShield
®
recloser comes pre-configured
with voltage correction factors. These correction
factors can be found in various locations
depending on the ordered configuration. Typically,
you can locate them on a label inside the door of
the HV unit, a separate label on the frame, on the
nameplate, on the door of the LV unit and in the
provided test reports.
If you need to enter new correction factors into the
relay or update existing ones, follow these steps:
1.
Determine the new calibration factors by
calculating the phase voltage for each phase:
a. If you're referring to a PT-connected phase-
to-phase connection, multiply the voltage
from the PT tap by the PT's ratio.
b. If you're referring to a PT-connected phase-
to-neutral connection, multiply the voltage
from the PT tap by the PT's ratio and 1.732.
2.
Divide each phase voltage by the
corresponding voltages displayed on the
relay. The results will be the correction
factors.
3.
Enter the correction factors either through
the front panel or the relay's software:
a. For RER615 and RER620, navigate to
Configuration > Analog Inputs > Voltage
(VA, VB, VC, VT) > Amplitude Correction
on the front panel to enter these correction
factors.
b. For RER615 and RER620, use PCM600 to
update these settings by going to IED
Configuration > Configuration > Analog
Inputs > Voltage (3U, VT). Right-click on
the parameter settings to select and
update them.
8.7 Final inspection
When installing the recloser and completing all
mechanical and electrical connections, EXCEPT
ENERGIZING THE POWER LINE, it is recommended
to inspect the following points:
1.
Verify that the recloser is properly leveled
and securely anchored.
2.
Perform a final check to ensure all hardware
is tightened.
3.
Securely tighten terminal and ground
connections.
4.
Check the tightness of control cable entrance
fittings.
5.
Ground both the recloser head and low
voltage control cabinets.
6.
Test the recloser by operating it from the
control cabinet front panel to confirm normal
operation.
7.
If the recloser has been stored improperly or
if there is suspicion of rough handling during
shipping, it is advisable to check the recloser
alignments, including the vacuum interrupter
(VI) contact wipe and microswitches.
If necessary, contact your ABB representative
for assistance.
29
Advertisement
Table of Contents
