14
251/02 en
4 Parametering
4.7
Setting the overcurrent blocking (I>)
The overcurrent blocking response threshold can be set from
50 % to 210 % (of the rated current of the current trans-
former) in steps of 1 % by pressing the Set and
function keys. Overcurrent blocking prevents tap change
operations in the presence of overload.
The voltage regulator output pulses are blocked and the
alarm signalling LED lamp responds when the measured
current exceeds the set blocking value. At the same time the
corresponding signalling relay is energized and remains
energized (contacts 26/27/28).
OVERCURRENT I>
110%
(50% - 210%)
09/30
4.8
Measuring transformers
(VT, CT CONFIGURATION)
The transformation ratios and measuring set-ups of the
voltage and current transformers used can be set in the
corresponding display windows by pressing the SET and
function keys.
Rated transformer current
Primary voltage of the voltage transformer in A
Rated transformer voltage
Primary voltage of the voltage transformer in kV, in relation
to 100 V secondary voltage.
Transformer phase, measuring circuit
Phase angle of the current/voltage transformer, see
fig. 3
for
explanations.
NOM.TRANSF.VOLTAGE
10.0V
(0.1kV- 999.9kV)
10/30
CURRENT
100A
(100A- 5000A)
11/30
TRANSFORMER PHASE
90 3 PH
(30,0,30,90,1PH)
12/30
Setting values for customary measuring circuits:
0° (for single-phase systems)
0° (for three-phase systems)
90° (for three-phase systems)
30° (for three-phase systems)
-30° (for three-phase systems)
3
intc230m
Configuration a Phase angle setting
Configuration a Phase angle setting
Configuration b Phase angle setting
Configuration c Phase angle setting
Configuration d Phase angle setting
Configuration e Phase angle setting