Operation Manual 37107F
MFR 3 - Multi Function Relay
Page 44/165
© Woodward
Alarms
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Alarm Class
The monitoring functions are divided into four alarm classes:
F0 - Warning alarm -
This alarm does not lead to an interruption of the operation. An alarm message is dis-
played without a centralized alarm.
Alarm text.
F1 - Warning alarm -
This alarm does not lead to an interruption of the operation. An alarm message is dis-
played and a centralized alarm will be output.
Alarm text + flashing LED "Alarm" + Relay "Centralized alarm" (horn).
F2 - Triggering alarm -
This alarm leads to a soft shutdown. A power reduction is performed prior to the GCB
being opened. A cool down period is also carried out.
Alarm text + flashing LED "Alarm" + Relay "Centralized alarm" (horn) + cool down.
F3 - Triggering alarm -
This alarm leads to the immediate opening of the GCB and a hard shutdown.
Alarm text + flashing LED "Alarm" + Relay "Centralized alarm" (horn) + immediate shutdown.
Internally Detected Alarms
List of alarms determined internally depending on the monitored variables:
Type of alarm
see page
Alarm
class
Alarm text
Relay output
(terminal)
Generator overfrequency, level 1
Gen.overfreq. 1
Generator overfrequency, level 2
Gen.overfreq. 2
Generator underfrequency, level 1
Gen.underfreq. 1
Generator underfrequency, level 2
Gen.underfreq. 2
Generator overvoltage, level 1
Gen.overvolt. 1
Generator overvoltage, level 2
Gen.overvolt. 2
Generator undervoltage, level 1
Gen.undervolt. 1
Generator undervoltage, level 2
Gen.undervolt. 2
Generator time-overcurrent, level 1
Gen.overcurr. 1
Generator time-overcurrent, level 2
Gen.overcurr. 2
Reverse/reduced load
Revers/min.power
Overload
Gen.overload
Unbalanced load
Load unbalance
Mains overvoltage
Mains-overvolt.
Mains undervoltage
Mains-undervolt.
Main overfrequency
Mains-underfreq.
Mains underfrequency
Mains-overfreq.
Mains phase/vector jump
Phase shift
Mains df/dt
df/dt error
Battery undervoltage
Batt.undervolt.
GCB synchronization time monitoring
GCB syn.failure
MCB synchronization time monitoring
MCB syn.failure
Switching to dead busbar time monitoring
Failure df/dVmax
Mechanical GCB malfunction on closing
GCBclose failure
Mechanical MCB malfunction on closing
MCBclose failure
Mechanical GCB malfunction on opening
GCB open failure
Mechanical MCB malfunction on opening
MCB open failure
Faulty ref.power zero contr.with interch.syn. GCB
Power not zero
Maintenance call
Service
Interface error X1 to X5
Interf.err. X1X5
Interface error Y1 to Y5
Interf.err. Y1Y5
Rotation field mismatch
91 -*
Phase sequence!
Generator reactive power, capacitive
Gen.reac.pow.cap
Generator reactive power, inducitive
Gen.reac.pow.ind
Note:
In the event of mains faults, the GCB or the MCB is opened according to the configuration, and is closed again following the mains
settling time.
* This message is no alarm message in the actual sense, but an informative message, which does not have to be acknowledged and causes
no shutdown of the engine. The display disappears automatically after correcting the rotating field.
Table 4-7: Alarms - text messages