TB MRI(K)3-C 03.02 E
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5.5.6 Current setting for high set element
The current setting value of this parameter appearing on
the display is related to the rated current of the relay.
This means: I>> = displayed value x I
N
.
When the current setting for high set element is set out of
range (on display appears "EXIT"), the high set element
of the overcurrent relay is blocked.
5.5.7 Trip delay for high set element
Independent from the chosen tripping characteristic for
I>, the high set element I>> has always a definite-time
tripping characteristic. An indication value in seconds
appears on the display.
5.5.8 Fast/Time tripping by switch ON of
the CB for the short ciruit element
After switch ON the CB a pick up of the I>> element
happens directly within 200ms, it is possible to switch
OFF without time delay when this parameter is already
set. (see chapter 5.5.4)
5.5.9 Pickup value for residual voltage (U
E
)
(ER/XR-relay types)
Regardless of the preset earth current, an earth fault is
only identified if the residual voltage exceeds the set
reference value. This value is indicated in volt.
5.5.10
Pickup current for earth fault
element (I
E>
)
(Similar to chapter 5.5.1)
The pickup value of
MRI(K)3-ICE a
nd
MRI(K)3-ICXR
re-
lates to % I
N
.
5.5.11
WARN/TRIP changeover
A detected earth fault can be parameterized as follows.
After delay time.
a) "warn" only the alarm relay trips
b) "trip" the trip relay trips and tripping values are
stored.
5.5.12
Time current characteristics for
earth fault element
(for E/X-relay types)
When adjusting the trip characteristics one of the follow-
ing 7 abbreviations is displayed:
DEFT
-
Definite Time (definite time over-
current protection)
NINV -
Normal inverse (Type A)
VINV
-
Very inverse (Type B)
EINV
-
Extremely inverse (Type C)
RINV
-
RI-Inverse
LINV
-
Long-term inverse
RXID
-
Special purpose characteristics
The displayed text can be changed by push-buttons
<+><-> . By pressing <ENTER> the required trip char-
acteristics is selected.
5.5.13
Tripping Time or Time Factor for
the Earth Fault Element
The setting procedure outlined in chapter 5.5.3 applies
here as well.
5.5.14
Fast/Time tripping by switch ON
of the CB for the earth fault low
set
element
The setting procedure outlined in chapter 5.5.4 applies
here as well.
5.5.15
Reset mode for inverse time
tripping in earth current path
The setting procedure outlined in chapter 5.5.5 applies
here as well.
5.5.16
Current setting for high set
element of earth fault super-
vision (I
E>>
)
The setting procedure outlined in chapter 5.5.6 applies
here as well.
The pickup value of
MRI(K)3-ICE
and
MRI(K)3-ICXR
re-
lates to I
N
in %.
