Delta supervision function has four different modes of operation. Proceed as follows to test the function in
a particular mode.
1. Set the following parameters:
• Operation = ON
• MeasMode = Phase-to-ground
• Imin = 10% of IBase
• DelI> = 80% of IBase
• DeltaT = 2
• tHold = 100
2. Set the constant current input of IL1 = 1A at 0° and IL2 = 1A at 120° and IL3 at -120° secondary at
rated frequency.
3. Based on the mode of operation, carry out the following changes on input condition of Step
2 to
detect pickup condition.
Each mode is given for increase and decrease operation. (3-a and 3-b)
Step No. OpMode Changes after step 2 Expected output
3-a Instantaneous 1
cycle or
Instantaneous 2
cycle
Change IL1 to 2 A STL1 , STRISE, BFI_3P signal should be
TRUE for 100 ms
3-b Instantaneous 1
cycle or
Instantaneous 2
cycle
Change IL1 back to 1A STL1 , STLOW, BFI_3P signal should be
TRUE for 100 ms
3-a RMS or DFT Mag Change IL1 to 2 A STL1, STRISE, BFI_3P signal should be
TRUE for 100 ms
3-b RMS or DFT Mag Change IL1 back to 1A STL1 , STLOW, BFI_3P signal should be
TRUE for 100 ms
4. Repeat Step 3 with IL2 changes for different mode.
11.10.5.2 Completing the test
GUID-2FE5E5F0-0E6C-499E-93D2-471C183B89BF v2
Continue to test another function or end the test by changing the TestMode setting to Disabled. Restore
connections and settings to their original values, if they were changed for testing purposes.
11.10.6 Delta supervision of real input DELSPVC
GUID-86ADAAC5-B6D3-46FE-A090-81F7C90A31A7 v1
Prepare the IED for verification of settings outlined in Section
"Preparing the IED to verify settings".
11.10.6.1 Verifying the signals and settings
GUID-8337C76B-A361-426E-B936-763105D85588 v1
Make sure that the function is connected to any of the available real derived outputs, for example the P
output signal of the CMMXU function.
1. Set the following parameters:
Section 11 1MRK 504 165-UUS Rev. J
Testing functionality by secondary injection
240 Transformer protection RET670
Commissioning manual
© 2017 - 2021 Hitachi Power Grids. All rights reserved
To Next Page
Loading...
