Function Block - ABB RED615 Technical Manual

1YHT530004D05 D
5.5.2
5.5.3
5.5.4
615 series
Technical Manual

Function block

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Figure 297: Function block
Functionality
An emergency condition can arise in cases where the motor needs to be started
despite knowing that this can increase the temperature above limits or cause a
thermal overload that can damage the motor. The emergency startup ESMGAPC
allows motor startups during such emergency conditions. ESMGAPC is only to
force the IED to allow the restarting of the motor. After the emergency start input
is activated, the motor can be started normally. ESMGAPC itself does not actually
restart the motor.
The function contains a blocking functionality. It is possible to block function
outputs, timer or the function itself, if desired.
Operation principle
The function can be enabled and disabled with the Operation setting. The
corresponding parameter values are "On" and "Off".
The operation of the emergency startup can be described using a module diagram.
All the modules in the diagram are explained in the next sections.
GUID-18128621-4A78-45D0-A788-9116B5213449 V1 EN
Figure 298: Functional module diagram
Standstill detector
The module detects if the motor is in a standstill condition. The standstill condition
can be detected based on the phase current values. If all three phase currents are
below the set value of Motor standstill A, the motor is considered to be in a
standstill condition.
Protection related functions
Section 5
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