ABB REG670 - Monitored Data

Table 366: SESRSYN Non group settings (advanced)
Name Values (Range) Unit Step Default Description
PhaseShift -180 - 180 Deg 1 0 Additional phase angle for selected line
voltage
14.1.6 Monitored data
Table 367: SESRSYN Monitored data
Name Type Values (Range) Unit Description
UDIFFME REAL - - Calculated difference of
voltage in p.u of set
voltage base value
FRDIFFME
REAL - Hz Calculated difference of
frequency
PHDIFFME REAL - deg Calculated difference of
phase angle
UBUS REAL - kV Bus voltage
ULINE REAL - kV Line voltage
14.1.7 Operation principle
14.1.7.1 Basic functionality
The synchrocheck function measures the conditions across the circuit breaker and
compares them to set limits. The output is only given when all measured quantities are
simultaneously within their set limits.
The energizing check function measures the bus and line voltages and compares them
to both high and low threshold detectors. The output is given only when the actual
measured quantities match the set conditions.
The synchronizing function measures the conditions across the circuit breaker, and
also determines the angle change occurring during the closing delay of the circuit
breaker, from the measured slip frequency. The output is given only when all
measured conditions are simultaneously within their set limits. The issue of the output
is timed to give closure at the optimal time including the time for the circuit breaker
and the closing circuit.
For double bus single circuit breaker and 1½ circuit breaker arrangements, the
SESRSYN function blocks have the capability to make the necessary voltage
selection. For double bus single circuit breaker arrangements, selection of the correct
voltage is made using auxiliary contacts of the bus disconnectors. For 1½ circuit
breaker arrangements, correct voltage selection is made using auxiliary contacts of the
bus disconnectors as well as the circuit breakers.
1MRK502052-UEN B Section 14
Control
631
Technical manual