Testing the voltage selection for double breaker
M2377-691 v6
This test should verify that correct voltage is selected for the measurement in the SESRSYN function
used for a diameter in a Breaker-and-a-half arrangement. Apply a single-phase voltage of 100%
GblBaseSelLine to the V-Line and a single-phase voltage of 100% GblBaseSelBus to the V-Bus. Verify
that correct output signals are generated.
1. Connect the analog signals to the voltage inputs, in pair of two for V1 and V2. (Inputs V3PB1,
V3PB2, V3PL1, V3PL2)
2. Activate the binary signals according to the used alternative. Verify the measuring voltage on the
synchronizing check function SESRSYN (25). Normally it can be good to verify synchronizing check
with the same voltages and phase angles on both voltages. The voltages should be verified to be
available when selected and not available when another input is activated so connect only one
voltage transformer reference at each time.
3. Record the voltage selection tests in a matrix table showing read values and AUTOSYOK/
MANSYOK signals to document the test performed.
Testing the voltage selection for 1 1/2 CB arrangements
GUID-12E7DA63-FE04-4C83-9BA6-34818C510DB8 v4
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
39 describes the
scenario when SESRSYN 1, SESRSYN 2 and SESRSYN 3 all are in the same IED. If SESRSYN 3 is in
another IED, WA1 will be considered as WA2 and LINE2 as LINE1. The voltage is selected by activation
of different inputs in the voltage selection logic as shown in table
39 and figure 57.
Table 39: Voltage selection logic
SESRSYN
CBConfig
setting
Section to
be
synchronize
d
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
SESRSYN 2
(Operates on
CB2 252)
Tie CB Line1 –
Line2
LN1 989 LN2 989 LN1SEL,
LN2SEL
Bus1 –
Line2
CB1 52 LN2 989 B1SEL,
LN2SEL
Bus2 –
Line1
CB3 352 LN1 989 B2SEL,
LN1SEL
Bus1 –
Bus2
CB1 52 CB3 352 B1SEL,
B2SEL
SESRSYN 3
(Operates on
CB3 352)
breaker-
and-a-half
bus alt. CB
(mirrored)
Bus2 –
Line2
LN2 989 B2SEL,
LN2SEL
Bus2 –
Line1
CB2 252 LN1 989 B2SEL,
LN1SEL
Bus2 –
Bus1
CB2 252 CB1 52 B1SEL,
B2SEL
1MRK 504 165-UUS Rev. J Section 11
Testing functionality by secondary injection
Transformer protection RET670 247
Commissioning manual
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