Manual 37353A
MFR 13 Packages - Protection Relay
© Woodward
Page 59/91
Relay Configuration
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NOTE
Clearing of faults and fault messages from the control unit will depend on the parameters "
Exter-
nal clearing
", "
Auto-clearing Relays
", and "
Auto-clearing Display
". These three parameters
will influence the other depending on how each is configured. This is explained in the following text.
External
Clearing ON
External acknowledgement of the
relays via the discrete input
"Blocking of protective functions
/ remote acknowledgement".
Acknowledgement via the discrete input
ON/OFF
"
Auto-clearing Relays
" configured "
OFF
" (refer to "Auto Acknowledge-
ment of the Relay" on page 59):
OFF
.............. Alarms that cannot be blocked with discrete input "Blocking of pro-
tective functions / remote acknowledgement" will not be reset when
the fault condition is no longer present. Pressing the "Clear" button
resets the relays.
ON
................ All alarms are reset when the discrete input "Blocking of protective
functions / remote acknowledgement" (terminals 5/6) is energized.
Alarms which cannot be blocked with the discrete input "Blocking of
protective functions / remote acknowledgement" are only reset after
the fault condition is no longer present.
"
Auto-clearing Relays
" configured "
ON
" (refer to "Auto Acknowledge-
ment of the Relay" on page 59):
OFF
.............. Pressing the "Clear" button resets the displayed fault messages.
ON
................ All displayed fault messages are reset when the discrete input
"Blocking of protective functions / remote acknowledgement" (ter-
minals 5/6) is energized. Alarms which cannot be blocked with the
discrete input "Blocking of protective functions / remote acknowl-
edgement" are only reset after the fault condition is no longer pre-
sent.
Auto Acknowledgement of the Relays
Auto-clearing
Relays ON
Relay auto acknowledgment
ON/OFF
ON
................ Automatic clearing of the relays is enabled. The relays are automati-
cally reset when the fault condition is no longer detected. The alarm
message in the display is cleared according to how the parameter
"
Auto-clearing Display
" is configured.
OFF
.............. Automatic clearing of the relays is disabled. Pressing the "Clear" but-
ton resets the relays.
The alarm message in the display is cleared according to how the parameter
"
Auto-clearing Display
" is configured. The subsequent screens of this
function are not indicated.
