System-disconnection relay EU400 NA-protection
27
Subject to technical changes
12.4 Description of the parameters
Parameters
Display
Explanation
Adjustment range
Limit value
8
U¯ ¯
8
8
U¯
8
8
U_
8
8
U_ _
8
8
Um
8
Voltage limit value
8
15.0
8
…
8
300
8
8
15.0
8
…
8
520
8
Limit value
8
UonF
8
Limit value for voltage (L1/2/3 <
8
UonF
8
=
frequency protection off)
8
10.0
8
…
8
320
8
Limit value
F¯ ¯
,
8
F¯
8
,
8
F_
8
,
8
F_ _
8
Frequency limit value
8
45.00
8
…
8
65.00
8
Limit value
8
dfdt
8
ROCOF, df/dt limit value
8
0.10
8
…
8
5.00
8
Limit value
8
U-0
8
zero voltage limit value
8
1.0
8
…
8
300
8
Hysteresis
8
H
8
253V (Limit)
– 3V (Hysteresis) =
250V (Reset value)
8
1.0
8
…
8
180.0
8
8
0.05
8
…
8
10.00
8
Response
time
(delay Alarm)
8
dAL
8
An alarm is suppressed for the set time
(seconds)
8
0.05
8
…
8
300.0
8
8
0.05
8
…
8
180.0
8
Turn-on time
(delay Off)
8
dOF
8
8
dOFA
8
Reset is delayed for the set time, also during
voltage recovery, this time (seconds) is always
counted down in the display
8
doFA
8
:
8
doF
8
for U+f together
8
0
8
…
8
6000
8
Enable time
(delay On)
8
dEon
8
There is no evaluation of the vector shift during
this time; starts with the application of the
control voltage and when opening the Enable
input
8
2
8
…
8
20
8
VSR
8
VSR
8
8
1 Ph
8
: a vector surge on one phase leads to
an alarm
8
3 Ph
8
: a vector surge on all phases
simultaneously leads to an alarm
8
1 Ph
8
…
8
3 Ph
8
Periods
8
per
8
Measuring time ROCOF, (4=sensitive,
50=insensitive)
Response time=
8
per
8
* Period du
8
dAL
8
8
4
8
…
8
50
8
delay Display
8
ddi
8
Interval during which the display is updated in
the display mode
8
0.1
8
…
8
2.0
8
