ABB Relion 670 series - Testing the Synchronizing Function; Testing the Synchrocheck Functionality

11.11.1.1 Testing the synchronizing function
M2377-21 v8
The voltage inputs used are:
V3PL1 VA, VB or VC line 1 voltage inputs on the IED
V3PBB1 Bus1 voltage input on the IED
Testing the frequency difference
M2377-116 v11
The frequency difference test should verify that operation is achieved when the frequency difference
between bus and line is less than set value of FreqDiffMax and above set value of FreqDiffMin. The test
procedure below will depend on the settings used. Input STARTSYN must be activated during the test.
FreqDiffMax = 50.2 Hz
FreqDiffMin = 50.01 Hz
tBreaker = 0.080 s
1. Apply voltages
1.1. V-Line = 100% VBaseLine and f-Line = 60.0 Hz
1.2. V-Bus = 100% VBaseBus and f-Bus = 60.15Hz
2. Check that a closing pulse is submitted at a closing angle equal to calculated phase angle value
from the formula below. Modern test sets will evaluate this automatically.
Closing Angle = |( (f
Bus
– f
Line
) * tBreaker * 360 degrees) |
f
Bus
= Bus frequency
f
Line
= Line frequency
tBreaker = Set closing time of the breaker
3. Repeat with
3.1. V-Bus = 100% VBaseBus and f-bus = 60.25 Hz, to verify that the function does not trip when
frequency difference is above limit.
4. Verify that the closing command is not issued when the frequency difference is less than the set
value FreqDiffMin.
11.11.1.2 Testing the synchrocheck functionality
M2377-132 v9
During the test of SESRSYN (25) for a single bay arrangement, these voltage inputs are used:
V-Line
VA, VB or VC line 1 voltage input on the IED according to the connection in SMT
V-Bus V5 voltage input on the IED according to the connection in SMT
Testing the voltage difference
M2377-194 v8
Set the voltage difference to 0.15 p.u. on the local HMI, and the test should check that operation is
achieved when the voltage difference VDiffSC is lower than 0.15 p.u.
The settings used in the test shall be final settings. The test shall be adapted to site setting values
instead of values in the example below.
Test with no voltage difference between the inputs.
Test with a voltage difference higher than the set VDiffSC.
1MRK 504 165-UUS Rev. J Section 11
Testing functionality by secondary injection
Transformer protection RET670 243
Commissioning manual
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