ABB Relion 620 Series - Tap Changer Control with Voltage Regulator OLATCC; Identification; Function Block; Functionality

Technical revision Change
E
Monitored data ACTIVE transferred to be
ACT visible output. SHOT_PTR output range
1...7.
F
Internal improvement
9.5 Tap changer control with voltage regulator
OLATCC
9.5.1 Identification
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE
C37.2 device
number
Tap changer control with voltage
regulator
OLATCC COLTC 90V
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.
1MRS757644 H
Control functions
620 series
Technical Manual
1045