Manual 37138C
ESDR 4T - Current Differential Protection Relay
Page 28/46
© Woodward
Release delay
Diff.curr.00,00s
Resetting time of differential current
0.10 to 99.98 s
Only visible if the "Self-acknowledging relay" screen is configured to ON.
Auto-acknowledge
messages ON
Self-acknowledging messages
ON/OFF
ON
................Once the fault condition is no longer detected and the message reset-
ting time has expired, the message is cleared from the display.
OFF
..............The messages are shown in the display until they have been manually
acknowledged. The subsequent screen is not displayed..
NOTE
...........Subsequent setting is blocked:
•
"
Self-acknowledging relay
"
"
OFF
"
•
"
Self-acknowledgement of messages
" "
ON
"
Acknowledge
message aft. 00s
Acknowledge messages delay time
1 to 99 s
The fault messages are acknowledged after the configured delay time expires. This
timer is initiated when the measured values return to the configured limit + hystere-
sis.
NOTE
The following screens are used to assign the warning messages to the relays 1 to 4. The number of the
relay to be enabled when the respective set point is exceeded has to be configured. If left as all 0s no
message will be issued. It does not matter what order the relay numbers are entered as. As an example,
if 2310 or 3102 is configured, relays 1,2, and 3 will react when this set point is exceeded.
Relay 3 is always connected to the "Ready for operation" message.
Diff.current 1
relay outp. 0000
Differential current 1 output by relay
0 to 4
If the differential current level 1 has been exceeded, the relay output(s) assigned
here will be enabled.
Diff.current 2
relay outp. 0000
Differential current 2 output by relay
0 to 4
If the differential current level 2 has been exceeded, the relay output(s) assigned
here will be enabled.
Range monit. Id
relay outp. 0000
Range exceeded message output by relay
0 to 4
If the current exceeds 5 × I
N
, the relay output(s) assigned here will be enabled.
inrush detected
relay outp. 0000
Inrush recognition output by relay
0 to 4
If the threshold value of the 2
nd
harmonics is exceeded, the relay output(s) assigned
here will be enabled. This output is only intended for diagnostics and commission-
ing purposes.
