ABB RELION 670 Series Technical Manual page 885

1MRK 502 066-UUS B
From the Master via
horizontal comm.
relativePosition
raiseVoltageOut
lowerVoltageOut
EnableAotoMSF
YLTCOUT ® ATCCIN
tapPosition
tapInHighVoltPos
tapInLowVoltPos
ANSI06000510 V1 EN-US
Figure 468: Simplified logic for parallel control in Master-Follower mode
14.4.4 Tap changer control and supervision, 6 binary inputs TCMYLTC
(84) and TCLYLTC (84)
The Tap changer control and supervision, 6 binary inputs (TCMYLTC, 84) and 32 binary inputs
TCLYLTC (84) gives the tap commands to the tap changer, and supervises that commands are
carried through correctly. It has built-in extensive possibilities for tap changer position
measurement, as well as supervisory and monitoring features. This is used in the voltage control
and can also give information about tap position to the transformer differential protection.
14.4.4.1 Operation principle
Reading of tap changer position
The tap changer position can be received to the tap changer control and supervision, 6 binary
inputs TCMYLTC (84) or 32 binary inputs TCLYLTC (84) function block in the following ways:
1. Via binary input signals, one per tap position (max. 6 or 32 positions).
2. Via coded binary (Binary), binary coded decimal (BCD) signals, or Gray coded binary signals.
3. Via a mA input signal.
Via binary input signals, one per tap position
In this option, each tap position has a separate contact that is hard wired to a binary input in the
IED. Via the Signal Matrix tool in PCM600, the contacts on the binary input card are then directly
connected to the
• inputs B1 – B6 on TCMYLTC (84) function
• or inputs B1 – B32 on TCLYLTC (84) function.
Technical manual
a
a<b
<
b
AND
AND
a
a>b
>
AND
b
AND
AND
AND
NOT
AND
AND
OR VRAISE
OR VLOWER
en06000510_ansi.vsd
Section 14
Control
SEMOD171455-1 v4
SEMOD171466-5 v4
SEMOD159170-10 v3
SEMOD159170-21 v5
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