1.1. V-Line = 100% GblBaseSelLine and f-Line = 50.0 Hz
1.2. V-Bus = 100% GblBaseSelBus and f-Bus = 50.2Hz
2. Check that a closing pulse is submitted at a closing angle less than 2 degrees from
phase equality. Modern test sets will evaluate this automatically.
3. Repeat with
3.1. V-Bus = 80% GblBaseSelBus and f-Bus = 50.25 Hz, to verify that the function
does not operate when frequency difference is above limit.
4. Repeat with different frequency differences for example, 100 mHz with f-Bus
nominal and line leading and for example 20 mHz (or just above FreqDiffMin) to
verify that independent of frequency difference the closing pulse occurs within 2
degrees.
5. Verify that the closing command is not issued when the frequency difference is less
than the set value FreqDiffMin.
6.7.1.2 Testing the synchrocheck check
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 inputs on the IED
V-Bus Bus voltage input on the IED
Testing the voltage selection for single 1 1/2 CB arrangements
At test of the SESRSYN (25) function for a breaker-and-a-half diameter the following
alternative voltage inputs can be used for the three SESRSYN (SESRSYN 1, SESRSYN
2, SESRSYN 3) functions. These three SESRSYN functions can either be in one, two or
three different IEDs. Table 3 describes the scenario when SESRSYN 1, SESRSYN 2 and
SESRSYN 3 all are in the same IED. If SESRSYN 3 is in another IED, Bus1 will be
considered as Bus2 and Line2 as Line1. The voltage is selected by activation of different
inputs in the voltage selection logic as shown in table
3 and figure 15.
Table 3: Voltage selection logic
SESRSYN
CBConfig
setting
Section to
be
synchroniz
ed
Activated
B1QCLD
input on
IED from
Activated
B2QCLD
input on
IED from
Activated
LN1QCLD
input on
IED from
Activated
LN2QCLD
input on
IED from
Indication
from
SESRSYN
on IED
SESRSYN 1
(Operates on
CB1 52)
breaker-
and-a-half
bus CB
Bus1 –
Line1
LN1 989 B1SEL,
LN1SEL
Bus1 –
Line2
CB2 252 LN2 989 B1SEL,
LN2SEL
Bus1 –
Bus2
CB2 252 CB3 352 B1SEL,
B2SEL
Table continues on next page
Section 6 1MRK 505 293-UUS A
Testing functionality
94
Commissioning manual
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