Signals - ABB RELION REX640 Technical Manual

Section 9
Control functions
9.7.7
1444
Voltage angle difference adjustment
In applications where the power transformer is located between the voltage
measurement and the CB, the vector group connection gives phase difference to the
voltages between the high- and low-voltage sides. The angle adjustment can be used
to meet synchronism.
The vector group of the power transformer is defined with clock numbers, where the
value of the hour pointer defines the low-voltage-side phasor and the high-voltage-
side phasor is always fixed to the clock number 12, which is the same as zero. The
angle between clock numbers is 30°. When comparing phase angles, the U_BUS_A
input is always the reference. This means that when the Yd11 power transformer is
used, the low-voltage-side voltage phasor leads the high-voltage-side phasor by 30º or
lags by 330º. The rotation of the phasors is counterclockwise.
The generic rule is that a low-voltage-side phasor lags the high-voltage-side phasor by
clock number ⋅ 30º. This is called angle difference adjustment and can be set for
ASNSCSYN with the Phase shift setting.

Signals

Table 1373: ASNSCSYN Input signals
Name Type
U3P1 SIGNAL
U3P2 SIGNAL
BLOCK BOOLEAN
BYPASS BOOLEAN
CL_COMMAND BOOLEAN
EXT_CHECK BOOLEAN
CB_TEST BOOLEAN
CB_OPEN BOOLEAN
CB_CLOSE BOOLEAN
ISO_A1_CLOSE BOOLEAN
ISO_B1_CLOSE BOOLEAN
ISO_A2_CLOSE BOOLEAN
ISO_B2_CLOSE BOOLEAN
ASC1_NS_DAT INT32
Table 1374: ASNSCSYN Output signals
Name Type
CL_FAIL_AL BOOLEAN
CMD_FAIL_AL BOOLEAN
AS_INIT_FAIL BOOLEAN
Table continues on next page
Default Description
- Three-phase voltages (Bus B side)
- Three-phase voltages (Bus A side)
0=False Blocking signal of the auto synchronization function
0=False Bypass for synchronization and closing conditions
check
0=False External closing request
0=False External permissive check for CB close
0=False Circuit breaker test position status
0=False Circuit breaker open status
0=False Circuit breaker close status
0=False Isolator A1 close status
0=False Isolator B1 close status
0=False Isolator A2 close status
0=False Isolator B2 close status
0 Coded integer data from ASCGAPC1
Description
CB closing failed
CB closing request failed
Synchronization not initiated
1MRS759142 C
REX640
Technical Manual