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Selector switches
Additional functions required by individual ap-
plications are selected by means of the selector
switches of switchgroup SG1 located on the
Switch
Function
SG1/1
Switch SG1/3 is used for choosing the operation characteristic of the low-set current
SG1/2
stage I>, i.e. definite time or inverse definite minimum time (IDMT) characteristic.
SG1/3
At definite time mode characteristic the setting range of the operation time t> is
selected by means of switches SG1/1 and SG1/2, whereas, at inverse definite minimum
time characteristic the switches are used for choosing the current/time characteristic
of the overcurrent stage.
SG1/1
SG1/2
0
1
0
1
0
1
0
1
SG1/4
Selection of the latching function for the tripping signals TS1 and TS2.
When SG1/4 = 0, the tripping signals return to normal (= the output relay resets, when
the energizing input signal causing the operation falls below the start level.
When SG1/4 = 1, the tripping signals remain on (= output relay energized), although
the energizing input signal falls below the starting level. The latched tripping signals
are reset by pressing the push-buttons STEP and RESET simultaneously or with the
command V101. When the STEP and RESET push-buttons are pushed the recorded
values are erased as well. *)
SG1/5
Selection of automatic doubling of the setting value of the high-set overcurrent stage
when the protected object is connected to the network.
When SG1/5 = 0, no doubling of the set start value of stage I>> is obtained.
When SG1/5 = 1, the set start value of stage I>> doubles automatically. The doubling
feature makes it possible to give the high-set current stage a setting value, which is
lower than the connection inrush current of the protected object.
SG1/6
Selection of the start current setting range of the high-set overcurrent stage I>>.
When SG1/6 = 0, the setting range is 2.5...20 x I
When SG1/6 = 1, the setting range is 0.5...4 x I
When SG1/6 =1, the module comprises two almost identical overcurrent stages and
may in this case be used for load shedding purposes. The setting ∞, infinite, is
indicated by - - - on the display.
*) From the program version 052 C and later an additional switchgroup (SG3) has been incorprated
into the relay module. When the latching function is used the latched output can be reset
by pushing the RESET button alone, if SG3/3=1, or by pushing the STEP button alone, if
SG3/2=1, in which case the stored information of the module is not erased.
SG1/3
Characteristic
0
0
Definite time
0
0
1
0
1
0
0
1
IDMT
0
1
1
1
1
1
front panel. The numbering of the switches
1...8, as well as the switch positions 0 and 1 are
marked on the front panel.
Operation time t> or
type of characteristic
0.05...1.00 s
"
0.5...10.0 s
"
0.5...10.0 s
"
5...100 s
Extremely inverse
"
Very inverse
"
Normal inverse
"
Long-time inverse
and ∞, infinite.
n
and ∞, infinite.
n
7
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