Application - ABB 615 series Technical Manual

Section 5
Protection related functions
5.6.5
5.6.6
5.6.7
Table 704: 62EST Group settings (Advanced)
Parameter Values (Range)
Motor standstill A 0.05...0.20
802
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 702: 62EST Input signals
Name Type
I_A SIGNAL
I_B SIGNAL
I_C SIGNAL
BLOCK BOOLEAN
ST_EMERG_RQ BOOLEAN
Table 703: 62EST Output signals
Name Type
ST_EMERG_ENA BOOLEAN
Settings
Unit Step
xIn 0.01
Default Description
0 Phase A current
0 Phase B current
0 Phase C current
0=False Block signal for activating the blocking mode
0=False Emergency start input
Description
Emergency start
Default Description
0.12 Current limit to check for motor standstill
condition
1MAC059074-MB A
615 series ANSI
Technical Manual