circuit breaker is below alarm level, the function initiates output signalPRES_ALM, pressure below alarm level, after a set time delay and indicate thatmaintenance of the circuit breaker is required. Similarly, if the input signalPRES_LO is high, which indicate gas pressure in the circuit breaker is belowlockout level, the function initiates output signal PRES_LO, after a time delay. Thetwo time delay settings, tPressureAlarm and tPressureLO, are included in order notto initiate any alarm for short sudden changes in the gas pressure. If the gaspressure in the circuit breaker goes below the levels for more than the set timedelays the corresponding signals, PRES_ALM, pressure below alarm level andPRES_LO, pressure below lockout level alarm will be obtained.The input signal BLK_ALM is used to block the two alarms and the input signalBLOCK to block both alarms and the function.13.13.7 Technical dataTable 339:SSIMG Technical dataFunction Range or value AccuracyPressure alarm 0.00-25.00 -Pressure lockout 0.00-25.00 -Temperature alarm -40.00-200.00 -Temperature lockout -40.00-200.00 -Timers (0.000-60.000) s ± 0.5% ± 110 ms13.14 Insulation liquid monitoring function SSIML13.14.1 IdentificationFunction description IEC 61850identificationIEC 60617identificationANSI/IEEE C37.2device numberInsulation liquid monitoring function SSIML - 7113.14.2 FunctionalityInsulation liquid monitoring function (SSIML) is used for monitoring the circuitbreaker condition. Binary information based on the oil level in the circuit breaker isused as input signals to the function. In addition, the function generates alarmsbased on received information.1MRK 502 034-UEN - Section 13Monitoring425Technical Manual
