Name Values (Range) Unit Step Default Description
tTempLockOut 0.000 - 60.000 s 0.001 0.000 Time delay for temperture lockout
tResetLevelAlm 0.000 - 60.000 s 0.001 0.000 Reset time delay for level alarm
tResetLevelLO 0.000 - 60.000 s 0.001 0.000 Reset time delay for level lockout
tResetTempLO 0.000 - 60.000 s 0.001 0.000 Reset time delay for temperture lockout
tResetTempAlm 0.000 - 60.000 s 0.001 0.000 Reset time delay for temperture alarm
14.3.6 Monitored data
PID-6951-MONITOREDDATA v5
Table 410: SSIML Monitored data
Name Type Values (Range) Unit Description
LEVEL REAL - - Level service value
TEMP REAL - deg Temperature of the
insulation medium
14.3.7 Operation principle
GUID-F4340B59-90D0-4EA7-9FD8-F21D425C884A v7
Liquid medium supervision SSIML is used to monitor the oil level in the
transformer. Binary inputs of oil level SENLVLALM, SENLVLLO and oil level
signal SENLEVEL are taken into account to initiate the alarm LVLALM and the
lockout LVLLO. When SENLEVEL is less than LevelAlmLimit or binary signal
from transformer SENLVLALM is high, the oil level indication alarm LVLALM
will be initiated. Similarly, if oil level input SENLEVEL is less than LevelLOLimit
or binary signal from transformer SENLVLLO is high, the oil level indication
lockout LVLLO will be initiated.
There may be sudden change in oil level for a very small time, for which the
function need not to initiate any alarm. To avoid the intermittent alarm, two time
delays tLevelAlarm or tLevelLockOut have been included. If the oil level goes
below the settings for more than these time delays, the corresponding alarm
LVLALM or lockout LVLLO will be initiated. The SETLLO binary input is used
for setting the liquid level lockout LVLLO. The LVLLO output retains the last
value until it is reset by using the binary input RESETLO. The binary input
BLKALM can be used for blocking the alarms, and the BLOCK input can block
both alarms and the lockout indication.
Temperature of the medium is available from the input signal of temperature. The
signal is monitored to detect high temperature.
When temperature input SENTEMP is above TempAlarmLimit, temperature alarm
TEMPALM will be initiated. Similarly, if temperature input SENTEMP is above
TempLOLimit, temperature lockout TEMPLO will be initiated.
There may be sudden change in temperature of the medium for a very small time,
for which the function need not to initiate any alarm. To avoid the intermittent
Section 14 1MRK 506 382-UEN A
Monitoring
570 Line distance protection REL650 2.2 IEC
Technical manual
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