ABB REG670 - Application

17.3.2 Application
Liquid medium supervision (SSIML) 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
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.
tTempAlarm: This is used to set the time delay for a temperature alarm indication,
given in s.
tTempLockOut: This is used to set the time delay for a temperature lockout indication,
given in s.
tResetLevelAlm: This is used for the level alarm indication to reset after a set time
delay in s.
tResetLevelLO: This is used for the level lockout indication to reset after a set time
delay in s.
tResetTempLO: This is used for the temperature lockout indication to reset after a set
time delay in s.
tResetTempAlm: This is used for the temperature alarm indication to reset after a set
time delay in s.
1MRK 502 071-UEN - Section 17
Monitoring
Generator protection REG670 2.2 IEC and Injection equipment REX060, REX061, REX062 637
Application manual