ABB Relion REG670, Technical Manual

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Name Values (Range) Unit Step Default Description
CLFactor 1.0 - 3.0 - 0.1 2.0 Adjustable factor for contact life function
InitCLCounter 0 - 9999999 s 1 250000 CL counter start value
EnabTapCmd Off
On
- - On Enable commands to tap changer
GlobalBaseSel 1 - 12 - 1 1 Selection of one of the Global Base Value
groups
14.4.8 Monitored data
Table 445: TCMYLTC Monitored data
Name Type Values (Range) Unit Description
CNT_VAL INTEGER - - Number of operations on
tap changer
CLCNT_VAL REAL - - Remaining number of
operations at rated load
TCPOS INTEGER - - Integer value
corresponding to actual
tap position
Table 446: TCLYLTC Monitored data
Name Type Values (Range) Unit Description
TCPOS INTEGER - - Integer value
corresponding to actual
tap position
14.4.9 Operation principle
The voltage control function is built up by two function blocks. Both are logical nodes
in IEC 61850-8-1.
• Automatic voltage control for tap changer
•
TR1ATCC for single control
• TR8ATCC for parallel control
• Tap changer control and supervision
•
TCMYLTC, 6 binary inputs
• TCLYLTC, 32 binary inputs
TR1ATCCand TR8ATCC are designed to automatically maintain the voltage at the
LV-side side of a power transformer within given limits around a set target voltage. A
raise or lower command is generated whenever the measured voltage, for a given
period of time, deviates from the set target value by more than the preset deadband
value that is, degree of insensitivity. A time-delay (inverse or definite time) is set to
Section 14
1MRK502052-UEN B
Control
758
Technical manual