5
Manual/automatic
mode or parallel
operation
The operation mode of the regulator can be se-
lected in three ways: via external control inputs,
push-buttons, or control commands over the
serial communication link. If the remote/local
control with the external control input BLOCK
is used, either the push-buttons or the serial
communication can be selected to be active.
Direct control via external control inputs is al-
ways active. Manual tap-changer control can be
performed in the same three ways as the selec-
tion of the operation mode. The figure below
illustrates the different control commands and
the associated logic of the module SPCU 1D50.
Fig. 1. Manual/automatic mode or parallel operation, control command logic.
SGF1/1
SGF2/1
SGF1/1
SGF2/8
SGF1/3
&
&
&
R/S
S
R
R/S
S
R
&
I>
&
>1
>1
>1
>1
”1”
>1
Commands:
Auto'
Man'
Commands:
Parallel on
Parallel off
Commands:
Parallel on(V152=1)
Parallel off(V152=0)
Auto'(I6=1)
Man'(I7=1)
Raise'(I9=1)
Lower'(I10=1)
Commands:
Raise'
Lower'
Command:
Parallel on
Parallel off
Command:
Man'
Command:
Lower'
Command:
Raise'
States:
Remote
Local
Blocking
Command:
Auto'
Serial port
Parallel push-button
Aut/Man push-button
RSV or RAISE' input
MAN' input
LOWER' input
RAISE' input
BLOCK input
AUTO' input
and push-buttons
Blocking
Remote/Local
1= Automatic mode
0= Manual mode
1= Parallel operation
Auto'
Man'
Parallel on
Parallel off
1= Lower output signal
1= Raise output signal
SPCU 1D50, control command logic
Raise', Lower'
Raise', Lower'
TCO input
Command for
tap changer:
Tap changer
operating
