ABB REG650 - Testing the Synchrocheck Check

3.1. U-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.
6.9.1.2 Testing the synchrocheck check
During the test of SESRSYN for a single bay arrangement, these voltage inputs are
used:
U-Line UL1, UL2 or UL3 line 1 voltage inputs on the IED
U-Bus Bus voltage input on the IED
Testing the voltage selection for single 1 1/2 CB arrangements
At test of the SESRSYN function for a 1½ CB 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
4 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 4 and figure 21.
Table 4: 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
CB1QA1)
1 ½ bus
CB
Bus1 –
Line1
LN1QB9 B1SEL,
LN1SEL
Bus1 –
Line2
CB2QA1 LN2QB9 B1SEL,
LN2SEL
Bus1 –
Bus2
CB2QA1 CB3QA1 B1SEL,
B2SEL
SESRSYN 2
(Operates on
CB2QA1)
Tie CB
Line1 –
Line2
LN1QB9 LN2QB9 LN1SEL,
LN2SEL
Bus1 –
Line2
CB1QA1 LN2QB9 B1SEL,
LN2SEL
Bus2 –
Line1
CB3QA1 LN1QB9 B2SEL,
LN1SEL
Bus1 –
Bus2
CB1QA1 CB3QA1 B1SEL,
B2SEL
Table continues on next page
1MRK 502 049-UEN A Section 6
Testing functionality
101
Commissioning manual