TB MRIK3 12.00 E
27
Function
Protec-
tion step
Display-
indication
corresponding
LED
trip
I>
TIME
I> + tD4
after the
I>>
TIME
I>> + tD4
4
th
AR
IE>
TIME
IE> + tD4
IE>>
TIME
IE>> + tD4
Table 5.4: Assignment of AR functions
The assignment mode can be terminated at any time by
pressing the <SELECT/RESET> push button for some
time (abt. 3 s).
A form is attached to this description where the setting
requested by the customer can be filled-in. This form is
prepared for telefax transmission and can be used for
your own reference as well as for telephone queries.
5.8
Indication of measuring and fault
values
5.8.1
Indication of measuring values
The following measuring quantities can be indicated on
the display during normal service:
•
Apparent current in phase 1 (LED L1 green),
•
apparent current in phase 2 (LED L2 green),
•
apparent current in phase 3 (LED L3 green),
•
apparent earth current (LED E green)
5.8.2
Unit of the measuring values
displayed
The measuring values can optionally be shown in the
display as a multiple of the "sec" rated value (x ln) or as
primary current (A). According to this the units of the
display change as follows:
Phase current
Indication as
Range
Unit
Secondary current 0.00 – 40.0
x In
Primary current
.000 – 999.
k000 – k999
1k00– 9k99
10k0 – 99k0
100K – 999k
1M00 – 2M00
A
kA*
kA
kA
kA
MA
Table 5.5: Ranges of phase currents from 2kA prim transformer
rated current
Earth current
Indication as
Range
Unit
Secondary current .000 – 15.0
x In
Primary current
.000 – 999.
k000 – k999
1k00 – 9k99
10k0 – 99k0
100k – 999k
1M00 – 2M00
A
kA*
kA
kA
kA
MA
Table 5.6: Ranges of phase currents from 2kA prim transformer
rated current
5.8.3
Indication of fault data
All faults detected by the relay are indicated on the front
plate optically. For this purpose, the four LEDs (L1, L2,
L3, E) and the four function LEDs (I>, I>>, IE> und IE>>)
are equipped at
MRIK3
. If, for example an overcurrent
occurs, first the respective phase LEDs will light up. LED
I> lights up at the same time. After tripping the LEDs are
lit permanently.
