COIL_STS
COIL_POS
CL_RESISTOR
OP_RESISTOR
Level detector
U3P
Network
parameters
calculation
Coil automatic
tuning
Resistor
control
Coil manual
tuning
URES
FIXCOIL_STS
RESISTOR_STS
HIGH_LIMIT
LOW_LIMIT
ST_CALIB
IRES
ST_TUNING
BLK_MANUAL
BLK_AUTO
ST_RESIS_SEQ
RAISE_LOCAL
LOWER_LOCAL
BLK_RESISTOR
ALARM
EARTH_FAULT
TUNING_ACT
RAISE_OWN
LOWER_OWN
FIXCOIL
OP_FIXCOIL
RESISTOR
Coil
commissioning
CL_FIXCOIL
Measurement
selection
MOT_ALARM
POT_ALARM
TUNING_SUC
Figure 923: Functional module diagram
9.11.6.1 Measurement selection
PASANCR supports two possibilities for zero-sequence voltage and coil position
measurement.
Voltage measurement
setting is used to define the location of voltage
measurement: from busbar or from coil. Busbar measurement is usually an open-
delta connection of phase-to-earth voltage transformers. Coil measurement is
available from the arc suppression coil's measurement winding.
Position Meas mode
setting is used to select the measurement between coil
position indication and coil position indication with a CT or sensor. "Pos. indication"
option uses the potentiometer-based COIL_POS information only. If "Pos. ind. and
meas." option is selected, the measured IRES is used for the control algorithm. In
this case, the COIL_POS signal works as a backup and is switched automatically into
use if the coil is disconnected from the network.
9.11.6.2 Level detector
Level detector op
setting is used to enable or disable the Level detector module.
"Enable" means that the Level detector module is enabled and can be used to start
the tuning procedure.
When "Disable" is selected, the automatic coil tuning procedure can be
started with input ST_TUNING.
Control functions 1MRS759142 F
1734 REX640
Technical Manual
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