15
M
M
Raise LowerRaiseLower
U
12
Raise' Raise' Lower'Lower'
Man' Aut/Man
Auto'
Auto'
Man'
-
-
-
-
+
+
R2
SPAU 341 C1
CB1
CB2
CB3
TR1
TR2
R1
SPAU 341 C1
TCO TCO
TCO
U
12
I
L3I
L3
SGF2/6=1
SGF2/7=0
SGF2/6=1
SGF2/7=0
X0 1/2/3
X0 1/2/3
TCO
~
N
N N
SGF2/8=0SGF1/1=0 SGF2/8=0SGF1/1=0
N N
N
N
Fig. 8.The voltage regulator SPAU 341 C1 in parallel operation using the master/slave principle.
Automatic selection of master regulator via digital inputs. When CB 2 is opened, the regulators
starts operating individually in automatic mode and the tap-changers have to be synchronized
before CB 2 is closed again. When CB 2 is closed, the TCO signals from both tap-changers are
connected to the regulators. Thus, the longest operate time will prevent regulating pulses during
tap-changer operation.
Table 2. Regulator mode compared to circuit breaker configuration
CB 1 CB 2 CB 3 Regulator 1 Regulator 2
open open open as before as before
open closed open as before as before
closed closed open automatic (master) manual (slave)
open closed closed manual (slave) automatic (master)
closed closed closed automatic (master) manual (slave)
open open closed as before automatic
closed open open automatic as before
closed open closed automatic automatic
Note!
The above mode of regulation according to the
master/slave principle of Table 2 requires that
the regulator is controlled solely with the circuit
breakers CB1, CB2 and CB3. If the control is
carried out with the push buttons on the front
panels of the concerned regulators, the functions
of Table 2 are not valid. If you wish to control
the regulators by means of the push buttons on
the front panel, you must, before returning to
the master/slave mode, reset the regulator to the
same state, which is valid for the concerned cir-
cuit breaker configuration as of Table 2.
To Next Page
Loading...
