ABB Relion REC670, Applications Manual

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17.3 Liquid medium supervision SSIML (71)
GUID-37669E94-4830-4C96-8A67-09600F847F23 v3
17.3.1 Identification
GUID-4CE96EF6-42C6-4F2E-A190-D288ABF766F6 v3
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Insulation liquid monitoring function SSIML - 71
17.3.2 Application
GUID-140AA10C-4E93-4C23-AD57-895FADB0DB29 v6
Liquid medium supervision (SSIML ,71) is used for monitoring the transformers and
tap changers. 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 transformer and the tap changer is used as input signals to the
function. In addition to that, the function generates alarms based on received
information.
17.3.3 Setting guidelines
GUID-0C8E498B-2A65-44ED-91D6-53EC72F49222 v2
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
transformer.
LevelLOLimit : This is used to set the limit for a level lockout condition in the
transformer.
TempAlarmLimit : This is used to set the limit for a temperature alarm condition in the
transformer.
TempLOLimit : This is used to set the limit for a temperature lockout condition in the
transformer.
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.
Section 17
1MRK 511 401-UUS A
Monitoring
524 Bay control REC670 2.2 ANSI
Application manual