Control functions
Table 115. Synchrocheck (SYNCRSYN)
Characteristic Value
Operation accuracy At the frequency f = f
n
Voltage: ±1.0% or ±0.002 × U
n
Frequency: ±10 mHz
Phase angle ±2°
Reset time <50 ms
Reset ratio Typically 0.96
Operate time accuracy +90ms/0 ms
Table 116. Tap changer control with voltage regulator (OLATCC)
Characteristic
Value
Operation accuracy
1)
At the frequency f = f
n
Differential voltage Ud:
±1.0% of the measured value or ±0.004 × U
n
(in measured voltages <2.0
× U
n
)
Operation value:
±1.0% of the U
d
or ±0.004 × U
n
for U
s
= 1.0 × U
n
Operate time accuracy in definite time mode
1)
±1.0% of the set value or 0.11 s
Operate time accuracy in inverse time mode
1)
±15.0% of the set value or 0.15 s
(at theoretical B in range of 1.1…5.0) Also note fixed minimum operate
time (IDMT) 1 s
Reset ratio for control operation Typically 0.80 (1.20)
Reset ratio for analog based blockings (except run back raise voltage
blocking)
Typically 0.96 (1.04)
1) Default setting values used
Generator Protection and Control
1MRS757583 C
Product version: 1.3
ABB 53
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