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