16.2.4
Settings
Table 415:
SSIMG (63) Group settings (basic)
Name
Values (Range)
Unit
Step
Default
Description
Operation
Disabled
Enabled
-
-
Disabled
Operation Disabled/Enabled
PressAlmLimit
1.00 - 100.00
-
0.01
5.00
Alarm setting for pressure
PressLOLimit
1.00 - 100.00
-
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
16.2.5
Operation principle
Gas medium supervision SSIMG (63) is used to monitor the gas pressure in the circuit
breaker. Binary inputs of gas density PRES_ALM, PRES_LO, and gas pressure signal
PRESSURE, are taken into account to initiate the alarms PRES_ALM and PRES_LO.
When PRESSURE is less than
PressAlmLimit
or binary signal from CB PRES_ALM is
high then the gas pressure alarm, PRES_ALM will be initiated. Similarly, if pressure input
PRESSURE is less than
PressLOLimit
or binary signal from CB PRES_LO is high or
temperature input TEMP is above lockout level
TempLOLimit
then the gas pressure
lockout, PRES_LO will be initiated.
There may be sudden change in pressure of the gas for a very small time, for which the
function need not to initiate any alarm. That is why two time delays
tPressureAlarm
or
tPressureLO
have been included. If the pressure goes below the settings for more than
these time delays, then only the corresponding alarm PRES_ALM or lockout PRES_LO
will be initiated. The SET_P_LO binary input is used for setting the gas pressure lockout.
The PRES_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 to block the alarms, and the
BLOCK input can block both alarms and the lockout indication.
Section 16
1MRK 511 365-UUS A
Monitoring
520
Phasor measurement unit RES670 2.1 ANSI
Technical manual
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