ABB ret650, Technical Manual

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Table 403: SSIMG Output signals
Name Type Description
PRESSURE REAL Pressure service value
PRES_ALM BOOLEAN Pressure below alarm level
PRES_LO BOOLEAN Pressure below lockout level
TEMP REAL Temperature of the insulation medium
TEMP_ALM BOOLEAN Temperature above alarm level
TEMP_LO BOOLEAN Temperature above lockout level
14.15.5 Settings
Table 404: SSIMG Group settings (basic)
Name Values (Range) Unit Step Default Description
Operation Off
On
- - Off Operation Off / On
PressAlmLimit 0.00 - 25.00 - 0.01 5.00 Alarm setting for pressure
PressLOLimit 0.00 - 25.00 - 0.01 3.00 Pressure 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
tPressureAlarm 0.000 - 60.000 s 0.001 0.000 Time delay for pressure alarm
tPressureLO 0.000 - 60.000 s 0.001 0.000 Time delay for pressure 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
tResetPressAlm 0.000 - 60.000 s 0.001 0.000 Reset time delay for pressure alarm
tResetPressLO 0.000 - 60.000 s 0.001 0.000 Reset time delay for pressure 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
14.15.6 Operation principle
Insulation gas monitoring function SSIMG is used to monitor gas pressure in the
circuit breaker. Two binary output signals are used from the circuit breaker to initiate
alarm signals, pressure below alarm level and pressure below lockout level. If the
input signal PRES_ALM is high, which indicate that the gas pressure in the circuit
breaker is below alarm level, the function initiates output signal PRES_ALM,
pressure below alarm level, after a set time delay and indicate that maintenance of the
circuit breaker is required. Similarly, if the input signal PRES_LO is high, which
indicate gas pressure in the circuit breaker is below lockout level, the function initiates
output signal PRES_LO, after a time delay. The two time delay settings,
tPressureAlarm and tPressureLO , are included in order not to initiate any alarm for
short sudden changes in the gas pressure. If the gas pressure in the circuit breaker goes
Section 14
1MRK 504 135-UEN A
Monitoring
494
Technical manual