ABB REL670 2.2 IEC, Applications Manual

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18.3 Liquid medium supervision SSIML
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18.3.1 Identification
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Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Insulation liquid monitoring function SSIML - 71
18.3.2 Application
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Liquid medium supervision (SSIML) is used for monitoring the oil insulated
device condition. For example, transformers, shunt reactors, and so on. When the
level becomes too low compared to the required value, the operation is blocked to
minimize the risk of internal failures. Binary information based on the oil level in
the oil insulated devices are used as input signals to the function. In addition, the
function generates alarms based on the received information.
18.3.3 Setting guidelines
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The parameters for Liquid medium supervision SSIML can be set via local HMI or
Protection and Control Manager PCM600.
Operation : This is used to disable/enable the operation of liquid medium
supervision i.e. Off / On .
LevelAlmLimit : This is used to set the limit for a level alarm condition in the oil
insulated device.
LevelLOLimit : This is used to set the limit for a level lockout condition in the oil
insulated device.
TempAlarmLimit : This is used to set the limit for a temperature alarm condition in
the oil insulated device.
TempLOLimit : This is used to set the limit for a temperature lockout condition in
the oil insulated device.
tLevelAlarm : This is used to set the time delay for a level alarm indication, given in
s.
tLevelLockOut : This is used to set the time delay for a level lockout indication,
given in s.
tTempAlarm : This is used to set the time delay for a temperature alarm indication,
given in s.
1MRK 506 369-UEN B
Section 18
Monitoring
Line distance protection REL670 2.2 IEC 777
Application manual