ABB SPAC 531 C User Manual And Technical Description page 108

Settings
6
The setting values are shown by the three
rightmost digits of the display. When lit, the
I>/I Set start current of stage I> as a multiple of the rated current I
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used. Setting range 0.5...2.5 x I
t> [s] The set start time of stage I>, expressed in seconds, when the definite time characteristic
k is used (SG1/3 = 0). The setting range is determined by the position of switches SG1/1
and SG1/2. Selectable setting ranges 0.05...1.00 s, 0.5...10.0 s and 5...100 s.
At inverse definite minimum time characteristic (SG1/3 = 1) the setting range of time
multiplier k is 0.05...1.00.
I>>/I Set starting current of stage I>> as a multiple of the rated current I
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used. Setting range 2.5...20.0 x I
Additionally, the setting infinite (displayed as - - -) can be selected, rendering the high-
set stage I>> inoperative.
t>> [s] The set operation time of stage I>>, expressed in seconds. The setting ranges, 0.04...1.00 s,
0.4...10.0 s and 4...100 s, are determined by the position of switches SG1/7 and SG1/8, see
below.
Further, the checksum of the selector switch-
group SG1 is indicated on the display when the
indicator under the switchgroup is glowing. In
this way a checked can be carried out to prove
that the switches have been set and that the
indicator below a setting knob shows that the
concerned setting value is being displayed.
.
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, when SG1/6 = 0, and 0.5...4.0 x I
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switches themselves work properly. An example
of calculating the checksum is given in the
description "General characteristics of C-type
relay modules".
of the energizing input
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of the energizing input
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, when SG1/6 = 1.
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