2
SPCU 1D50
Automatic voltage
regulating module
Contents
Features .......................................................................................................................... 2
Operation principle ........................................................................................................ 3
Control voltage U
p
.................................................................................................... 3
Reduce set voltage ..................................................................................................... 3
Second settings .......................................................................................................... 3
Line-drop compensation U
z
...................................................................................... 4
Line drop compensation with parallel transformers ................................................... 4
Manual/automatic mode or parallel operation ........................................................... 5
Negative reactance principle ...................................................................................... 6
Minimizing circulating current .................................................................................. 6
Remote/local control ................................................................................................. 6
Front panel .....................................................................................................................7
Operation indicators ....................................................................................................... 7
Settings and recorded information .................................................................................. 8
Selector switches ........................................................................................................... 10
Measured data............................................................................................................... 12
Recorded information................................................................................................... 13
Calibration of voltage measurement.............................................................................. 15
Menu chart ................................................................................................................... 16
Inverse time characteristic ............................................................................................. 18
Technical data ............................................................................................................... 18
Serial communication parameters ................................................................................. 19
Event codes.............................................................................................................. 19
Remote transfer data................................................................................................ 21
Fault codes .................................................................................................................... 25
Features
Measured quantities: one phase-to-phase volt-
age and three phase currents
Stable transformer secondary voltage regardless
of the loading situation
Line-drop compensation
Detects undervoltage, overvoltage and overcur-
rent
Parallel operation of transformers feeding the
same busbar, by the master/slave, negative reac-
tance or minimizing circulating current princi-
ple
Digital display of set and recorded values
All settings can be keyed in via the MMI on the
front panel or via the serial interface using a
portable PC and a downloading program.
Self-supervision system continuously monitor-
ing the operation of the electronics and the mi-
croprocessor. When a permanent fault is de-
tected, the alarm output relay operates and the
other outputs are blocked.
1MRS 750111-MUM EN
Issued 1996-08-07
Modified 2000-06-16
Version D
Checked
Approved
Data subject to change without notice
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