Tap Changer Control With Voltage Regulator Olatcc; Identification; Function Block; Functionality - ABB RELION 620 Series Technical Manual

1MRS757644 H
Technical revision
E
F
9.5 Tap changer control with voltage regulator
OLATCC
9.5.1

Identification

Function description
Tap changer control with voltage
regulator
9.5.2

Function block

Figure 557: Function block
9.5.3

Functionality

The tap changer control with voltage regulator function OLATCC (on-load tap
changer controller) is designed for regulating the voltage of power transformers
with on-load tap changers in distribution substations. OLATCC provides a manual
or automatic voltage control of the power transformer by using the raising or
lowering signals to the on-load tap changer.
620 series
Technical Manual
Change
Monitored data ACTIVE transferred to be
ACT visible output. SHOT_PTR output range
1...7.
Internal improvement
IEC 61850 IEC 60617
identification identification
OLATCC COLTC
Control functions
ANSI/IEEE
C37.2 device
number
90V
1045