ABB RELION 670 Series Technical Manual page 1050

Section 16
Monitoring
Name Values (Range)
tResetPressLO 0.000 - 60.000
tResetTempLO 0.000 - 60.000
tResetTempAlm 0.000 - 60.000
16.2.6 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
from CB PRES_LO is high or temperature input TEMP is above lockout level
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
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
TEMP_ALM will be initiated. Similarly, if temperature input TEMP is greater than
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
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
Table 759: SSIMG (63) Technical data
Function
Pressure alarm level
Pressure lockout level
Temperature alarm level
Temperature lockout level
Table continues on next page
1044
Unit Step Default
s 0.001 0.000
s 0.001 0.000
s 0.001 0.000
TempAlarmLimit , then temperature alarm
Range or value
1.00-100.00
1.00-100.00
-40.00-200.00
-40.00-200.00
Description
Reset time delay for pressure lockout
Reset time delay for temperture lockout
Reset time delay for temperture alarm
GUID-359458EA-FFAA-4A44-A8E8-9469CA069C80 v6
PressLOLimit or binary signal
TempLOLimit then the
tPressureAlarm or tPressureLO have
TempLOLimit ,
tTempAlarm or tTempLockOut
GUID-F034B396-6600-49EF-B0A5-8ED96766A6A0 v6
Accuracy
±10.0% of set value
±10.0% of set value
±2.5% of set value
±2.5% of set value
1MRK 502 066-UUS B
Technical manual