Manual 37137B
ESDR 4 - Current Differential Protection Relay
Page 24/35
© Woodward
automatic reset
error text 00s
Delay for automatic reset of error text
1 to 60 s
Only visible when the screens "Automatic reset of the relay"
and
"Automatic
reset of error text" are configured to ON
The fault text will automatically delete, when the fault conditions are no longer de-
tected for the time period set here.
warning
ON
Warning (monitoring level 1)
ON/OFF
ON
................The adjustable warning characteristic is being monitored and the fol-
lowing screens of this option are displayed.
OFF
..............The adjustable warning characteristic is not being monitored and the
following screens of this option are not displayed.
warning limit
Id/IN Y=00,0%
Trigger value Id/IN (monitoring level1, Y1)
3.0 to 40.0 %
Only visible when the screen "Warning" is configured to ON.
This value determines the vertical position of the corner point of the warning char-
acteristic. The horizontal position (X12) is identical with that of the trip character-
istic. Usually the warning limit is lower than the trip limit value.
pick-up time
warning 0,00s
Enable delay time of the "warning" relay (monitoring level1)
0.04 to 3.00 s
Only visible when the screen "Warning" is configured to ON.
If the differential current exceeds the warning threshold curve without interruption
over this time period, the control recognizes that the warning limit has been ex-
ceeded.
release time
warning 0,00s
Relay disable delay time (monitoring level 1)
0.10 to 3.00 s
Only visible when the screen "Warning" is configured to ON
If the differential current value which initiated the warning should fall 2% or more
below the trigger threshold limit and remain uninterrupted for the period of time
configured here, the fault condition will be terminated and the relay output and
fault text will be reset.
display value
Id [-]
Display – measured value I
d
in
[%] / [A]
[%]
...............The percentage of the rated generator current that is measured is dis-
played on the screen.
[A]:
...............The measured absolute values are displayed on the screen.
display value
IS [-]
Display – measured value I
S
in
[%] / [A]
[%]
...............The percentage of the rated generator current that is measured is dis-
played on the screen.
[A]:
...............The absolute measured values are displayed on the screen.
