Name Values (Range) Unit Step Default Description
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
16.2.6 Operation principle
GUID-359458EA-FFAA-4A44-A8E8-9469CA069C80 v6
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.
Temperature of the medium is available from the input signal of temperature. The signal is
monitored to detect high temperature.
When temperature input TEMP is greater than
TempAlarmLimit
, then temperature alarm
TEMP_ALM will be initiated. Similarly, if temperature input TEMP is greater than
TempLOLimit
,
then TEMP_LO will be initiated.
There may be sudden change in temperature of the medium for a very small time, for which the
function need not to initiate any alarm. That is why two time delays
tTempAlarm
or
tTempLockOut
have been included. If the temperature goes above the settings for more than these time delays,
then only the corresponding alarm TEMP_ALM or lockout TEMP_LO will be initiated. The SET_T_LO
binary input is used for setting the temperature lockout. The TEMP_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.
16.2.7 Technical data
GUID-F034B396-6600-49EF-B0A5-8ED96766A6A0 v6
Table 759: SSIMG (63) Technical data
Function
Range or value Accuracy
Pressure alarm level 1.00-100.00 ±10.0% of set value
Pressure lockout level 1.00-100.00 ±10.0% of set value
Temperature alarm level -40.00-200.00 ±2.5% of set value
Temperature lockout level -40.00-200.00 ±2.5% of set value
Table continues on next page
Section 16 1MRK 502 066-UUS B
Monitoring
1044
Technical manual
To Next Page
Loading...
