Table 71. On-load tap changer control with voltage regulator (OLATCC) main settings
Parameter
Function
Value (Range)
Step
Band center voltage
OLATCC
0.000...2.000 x Un
0.001
Control delay time 1
OLATCC
1000...300000 ms
100
Control delay time 2
OLATCC
1000...300000 ms
100
Line drop V Ris
OLATCC
0.0...25.0 %
0.1
Line drop V React
OLATCC
0.0...25.0 %
0.1
Load phase angle
OLATCC
-89...89 deg
1
Stability factor
OLATCC
0.0...70.0 %
0.1
Auto parallel mode
OLATCC
Auto master
Auto follower
NRP
MCC
-
Operation mode
OLATCC
Manual
Auto single
Auto parallel
Input control
-
Delay characteristics
OLATCC
Inverse time
Definite time
-
LCT pulse time
OLATCC
500...10000 ms
100
Band width voltage
OLATCC
1.20...18.00 % Un
0.01
Custom Man blocking
OLATCC
1=Custom disabled
2=OC
3=UV
4=OC, UV
5=EXT
6=OC, EXT
7=UV, EXT
8=OC, UV, EXT
-
Load current limit
OLATCC
0.10...5.00 x In
0.01
Block lower voltage
OLATCC
0.10...1.20 x Un
0.01
Runback raise volt
OLATCC
0.80...2.40 x In
0.01
Cir current limit
OLATCC
0.10...5.00 x In
0.01
Lower block tap
OLATCC
-36...36
-
Raise block tap
OLATCC
-36...36
-
LDC limit
OLATCC
0.00...2.00 x Un
0.01
LDC enable
OLATCC
False
True
-
Follower delay time
OLATTC
6...20 s
-
Transformer Protection and Control
1MRS757846 A
RET620
Product version: 2.0
ABB
43