ABB Relion REG670, Technical Manual, Page: 901 / 1298

16.3.5 Settings
Table 655: SSIML Group settings (basic)
Name Values (Range) Unit Step Default Description
Operation Off
On
- - Off Operation Off / On
LevelAlmLimit 1.00 - 100.00 - 0.01 5.00 Alarm setting for level
LevelLOLimit 1.00 - 100.00 - 0.01 3.00 Level lockout setting
TempAlarmLimit -40.00 - 200.00 - 0.01 30.00 Temperature alarm level setting of the
medium
TempLOLimit -40.00 - 200.00 - 0.01 30.00 Temperature lockout level of the medium
tLevelAlarm 0.000 - 60.000 s 0.001 0.000 Time delay for level alarm
tLevelLockOut 0.000 - 60.000 s 0.001 0.000 Time delay for level lockout indication
tTempAlarm 0.000 - 60.000 s 0.001 0.000 Time delay for temperature alarm
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
16.3.6 Operation principle
Liquid medium supervision SSIML is used to monitor the oil level in the circuit
breaker. Binary inputs of oil level LVL_ALM, LEVEL_LO and oil level signal
LEVEL are taken into account to initiate the alarms LVL_ALM and LVL_LO. When
LEVEL is less than
LevelAlmLimit or binary signal from CB LVL_ALM is high, then
the oil level indication alarm, LVL_ALM will be initiated. Similarly, if oil level input
LEVEL is less than
LevelLOLimit or binary signal from CB LVL_LO is high or
temperature input TEMP is above lockout level TempLOLimit , then the oil level
indication lockout, LVL_LO 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. That is why two time delays
tLevelAlarm or
tLevelLockOut have been included. If the oil level goes below the settings for more
than these time delays, then only the corresponding alarm LVL_ALM or lockout
LVL_LO will be initiated. The SET_L_LO binary input is used for setting the gas
pressure lockout. The LVL_LO output retains the last value until it is reset by using
the binary input RESET_LO. Hysteresis type comparators have been used with the
setting for relative and absolute hysteresis. The binary input BLK_ALM 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.
1MRK502052-UEN B
Section 16
Monitoring
895
Technical manual