Application - ABB RELION REX640 Technical Manual

Section 5
Protection related functions
5.6.6
5.6.7
5.6.8
Table 1036: ESMGAPC Group settings (Advanced)
Parameter
Motor standstill A
Table 1037: ESMGAPC Non group settings (Basic)
Parameter
Operation
1094
The function also provides the ST_EMERG_ENA output change date and time,
T_ST_EMERG. The information is available in the monitored data view.

Application

If the motor needs to be started in an emergency condition at the risk of damaging the
motor, all the external restart inhibits are ignored, allowing the motor to be restarted.
Furthermore, if the calculated thermal level is higher than the restart inhibit level at an
emergency start condition, the calculated thermal level is set slightly below the restart
inhibit level. Also, if the register value of the cumulative start-up time counter exceeds
the restart inhibit level, the value is set slightly below the restart disable value to allow
at least one motor start-up.
The activation of the ST_EMERG_RQ digital input allows to perform emergency start.
The protection relay is forced to a state which allows the restart of motor, and the
operator can now restart the motor. A new emergency start cannot be made until the
10 minute time-out has passed or until the emergency start is released, whichever
takes longer.
The last change of the emergency start output signal is recorded.
Signals
Table 1034: ESMGAPC Input signals
Name
I3P
BLOCK
ST_EMERG_RQ
Table 1035: ESMGAPC Output signals
Name
ST_EMERG_ENA
Settings
Values (Range) Unit
0.05...0.20 xIn
Values (Range) Unit
1=on
5=off
Type Default Description
SIGNAL - Three-phase currents
BOOLEAN 0=False Block signal for activating the blocking mode
BOOLEAN 0=False Emergency start input
Type Description
BOOLEAN Emergency start
Step Default
0.01 0.12
Step Default
1=on
1MRS759142 C
Description
Current limit to check for motor standstill
condition
Description
Operation Off / On
Technical Manual
REX640