ABB Relion 670 Series Commissioning Manual page 135

1MRK 511 403-UEN Rev. K
3. Set the constant input voltage as, UL1 = 63.5∠0° V, UL2 = 63.5∠240° V, and UL3 = 63.5∠120°
V in secondary at rated frequency.
4. Set the constant input current as, IL1 = 0∠0° A, IL2 = 0∠240° A, and IL3 = 0∠120° A in
secondary at rated frequency.
5. Following are the steps to check the operation of Step 1.
Step
No.
5-a
5-b
5-c
6. Repeat
values of input currents as per slope characteristics and the VDepFact2 based on the I>>
value; check the output ST2 and START.
Verification of zero sequence-based operation
1. Set the following parameters:
•
•
•
•
•
•
2. Values of the logical signals and service values for SCCFPVOC are available on the local HMI
under: Main menu/Tests/Function status/Unbalance protection/
CapBankCascadingFail(51V,2(I>/U<))/SCCFPVOC (51V, 2(I>/U<)):x, where x = instance
number.
3. Set the constant input voltage as, UL1 = 63.5∠0° V, UL2 = 63.5∠240° V, and UL3 = 63.5∠120°
V in secondary at rated frequency.
Bay control REC670
Commissioning manual
The Base values, CT and VT ratios are as follows:
2.1. UBase considered is 400 kV
2.2. IBase considered is 3000 A and the calculations are done considering
CT ratio as 3000 A/1 A and VT ratio as 400 kV/110 V
2.3. Rated frequency = 50 Hz
Step1 operating characteristic verification
Inject constant voltages of UL1 = 1.0∠0° V, UL2 = 1.0∠120°
V, UL3 = 1.0∠240° V and constant currents of IL1 = 0.10∠0°
A, IL2 = 0.10∠120° A, IL3 = 0.10∠240° A in secondary at
rated frequency.
Repeat
Inject constant voltages of UL1 = 57.73∠0° V, UL2 =
57.73∠120° V, UL3 = 57.73∠240° V and constant currents of
IL1 = 1.10∠0° A, IL2 = 1.10∠120° A, IL3 = 1.10∠240° A in
secondary at rated frequency.
Repeat
Inject constant voltages of UL1 = 76.21∠0° V, UL2 =
76.21∠120° V, UL3 = 76.21∠240° V and constant currents of
IL1 = 1.26∠0° A, IL2 = 1.26∠120° A, IL3 = 1.26∠240° A in
secondary at rated frequency.
Step 3, Step 4 and Step 5
Operation = ON
Operation1 = ON (Step 1)
CurrentInput = 3×ZeroSeq
VoltageInput = 3×ZeroSeq
I > = 125% IBase
VDepFact1 = (1-117)/I> = 0.064
The Base values, CT and VT ratios are as follows:
2.1. UBase considered is 400 kV
2.2. IBase considered is 3000 A and the calculations are done considering
CT ratio as 3000 A/1 A and VT ratio as 400 kV/110 V
2.3. Rated frequency = 50 Hz
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Step 3 and Step 4, to reset ST1 and START.
Step 3 and Step 4, to reset ST1 and START.
for Step 2 operation, by setting Operation2 (Step 2) ON, new
Section 11
Testing functionality by secondary injection
Expected output
ST1 and START signal should be
TRUE
ST1 and START signal should be
TRUE
ST1 and START signal should be
TRUE
GUID-8EAE0867-4161-4BFF-AE89-BE44F374B6A1 v1
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