System-disconnection relay EU400 NA-protection
23
Subject to technical changes
11.2 Functional characteristics
Functional characteristics
Explanation
VSR display value
The highest measured value is always displayed. The display value is reset to
0 by deleting the max. value and when resetting into the go (good) state.
Delay Enable On time
Runs down when starting the unit and after opening the enable input; during
this time there is no evaluation of the vector shift
Reset time
When a reset time
8
doF
8
is running, it is always counted down in the display
(shortest one first)
Reset
Use the Reset key or interrupt the control voltage for > 2 s (comply with reset
delay)
Display mode
8
Scn
8
After the last measurement it switches into the scan mode; this is indicated by
the display
8
scn
8
.
All measurements will now be displayed cyclically for the time set in
8
dit
8
.
MIN / MAX values
All min and max values are saved zero-voltage maintained (non-volatile).
Tripping time
(only with feedback
contacts connected)
Connecting the feedback contacts enables measuring of the shut-down time.
After a tripping test via the test menu (button test) and selection of the trip
circuit (see
), the respective tripping time is displayed. (Pr2 and
Y1+Y2 bridged, display for K1 only) The display duration is max. 3 minutes or
until button test is pressed. The display resolution is 1ms.
Total shut-down time = Tripping time + Response time
8
dAL
.
8
After a shut-down in the simulation mode the total shut-down time is displayed
until the button is pressed again)
The longer time of both channels is always displayed.
Alarm counter
The unit saves max 100 alarms (cause, measurement value, at operating time).
The LEDs indicate the cause; the tripping value that led to the alarm each
stands in the 7-segment display. Alternately the time difference, current
operating time
– tripping operating time is displayed. (how long ago the alarm
triggered)
Cumulative alarm time
8
tal
.
8
The cumulative alarm time TAL indicates how long the relay was switched off
due to an alarm. It is recorded with a resolution of 1 minute and only when the
control voltage is applied.
Query: In the display mode button to
8
ac
.
8
is displayed. 1x
button =
Cumulative alarm time
8
tal
.
8
Standby mode
8
uSr .
8
→
8
StbY
.
8
If E1-E2 are closed (e.g., by ripple control receiver, timer, dimmer), Relays K1
and K2 are switched off. The number and duration of the shut-downs is
recorded.
Query: In the display mode button to
8
ac
.
8
is displayed. 2x
button =
Standby counter
8
StbY
.
8
1x
button = Standby time
8
StbY
.
8
synchronization mode
8
uSr .
8
→
8
y1y2
.
8
If E1-E2 are closed, the evaluation of the feedback contacts is suppressed.
That means when using generators, a section switch can be used for mains
synchronization.
Automatic restart attempts
If there is an error by the feedback contacts
8
Err7
8
, 2 restart attempts are
automatically performed in an interval of 10s.
False triggering by undervoltage trips (e.g. during a thunderstorm) do not lead
to permanent shut-down.
Frequency undervoltage
protection
8
uonF
8
F one of the measured voltages less than
8
UonF
8
, the frequency
evaluation is interrupted until all voltages have exceeded
8
UonF
8
.
(does not apply to device start / apply of the control voltage)
