TB XRI1-IE 11.01 E
19
6.1.19
Display of the activation storage
(FLSH/NOFL)
If after an activation the existing current drops again
below the pickup value, e.g. I>, without a trip has
been initiated, LED I> signals that an activation has
occured by flashing fast. The LED keeps flashing until it
is reset again (push button <RESET>). Flashing can be
suppressed when the parameter is set to NOFL.
6.1.20
Blocking the protection functions
and assignment of the output
relays
Blocking the protection functions:
The blocking function of the
XRI1-IE
can be set ac-
cording to requirement. By applying the aux. voltage
to D8/E8, the functions chosen by the user are
blocked. Setting of the parameter should be done as
follows:
•
When pressing push buttons <ENTER> and <TRIP>
at the same time, message "BLOC" is displayed (i.e.
the respective function is blocked) or "NO_B"
(i.e. the respective function is not blocked). The LED
allocated to the first protection function I> lights red.
•
By pressing push buttons <+> <-> the value dis-
played can be changed.
•
The changed value is stored by pressing <ENTER>
and entering the password.
•
By pressing the <SELECT/RESET> push button, any
further protection function which can be blocked is
displayed.
•
Thereafter the blocking menu is left by pressing
<SELECT/RESET> again.
Function
Display LED/
Colour
I>
Overcurrent
(Low set)
NO_B
I> yellow
I>>
Overcurrent
(High set)
BLOC
I>> yellow
I
E>
Earth current
1. element
NO_B
I
E>
yellow
I
E>>
Earth current
2. element
NO_B
I
E>>
yellow
t
CBFP
Circuit breaker
failure protection
NO_B
Table 6.1: Default settings of blocking functions
Assignment of the output relays:
Unit
XRI1-IE
has five output relays. The fifth output re-
lay is provided as permanent alarm relay for self su-
pervision is normally on. Output relays 1 - 4 are nor-
mally off and can be assigned as alarm or tripping re-
lays to the current functions which can either be done
by using the push buttons on the front plate or via se-
rial interface RS485. The assignment of the output re-
lays is similar to the setting of parameters, however,
only in
the assignment mode. The assignment mode can be
reached only via the blocking mode.
By pressing push button <SELECT/RESET> in blocking
mode again, the assignment mode is selected.
The relays are assigned as follows: LEDs I>, I>>, I
E>
,
I
E>>
are two-coloured and light up
green
when the out-
put relays are assigned as
alarm relays
and
red
as
tripping relays
.
Definition:
Alarm relays
are activated at pickup.
Tripping relays
are only activated after elapse of the
tripping delay.
After the assignment mode has been activated, first
LED I> lights up green. Now one or several of the four
output relays can be assigned to current element I> as
alarm relays. At the same time the selected alarm re-
lays for frequency element 1 are indicated on the dis-
play. Indication "1_ _ _" means that output relay 1 is
assigned to this current element. When the display
shows "_ _ _ _", no alarm relay is assigned to this cur-
rent element. The assignment of output relays 1 - 4 to
the current elements can be changed by pressing <+>
and <-> push buttons. The selected assignment can be
stored by pressing push button <ENTER> and subse-
quent input of the password. By pressing push button
<SELECT/RESET>, LED I> lights up red. The output re-
lays can now be assigned to this current element as
tripping relays.
Relays 1 - 4 are selected in the same way as de-
scribed before. By repeatedly pressing of the
<SELECT/RESET> push button and assignment of the
relays all elements can be assigned separately to the
relays. The assignment mode can be terminated at any
time by pressing the <SELECT/RESET> push button for
some time (abt. 3 s).
