ABB UMC100.3 Manual page 55

C O N F I G U R I N G T H E M OTO R P R OT E C T I O N F U N C T I O N S
Parameter Description
Parameter
Dip Duration
Dip Autorestart Window
Dip Autorestart Delay
Dip Enable
Dip Autorestart Enable
Dip Level
Dip Restart Level
Depending on the duration of a voltage Dip and the parameters above different reactions can be configured.
The following four diagrams show different cases.
• Case a: short low voltage situation. The motor keeps running.
• Case b: longer low voltage situation with motor stop. The motor is automatically re-started after a delay.
• Case c: long low voltage situation triggering an error
• Case d: two Dips within a short period of time
U
Dip Restart Level
Dip Level
UMC Relay Out
DIP signal at
digital input
—
Case A:
The low voltage situation is shorter than the 'Dip Autorestart Window' so the
UMC output relay does not open. The motor keeps running without interruption.
Explanation
If the voltage Dip is longer than this time a 'Dip Duration' error is triggered.
If the voltage recovers within this time the motor is not switched off - i.e. the UMC
output relay is switched on.
The time delay until the motor is restarted after the end of a voltage Dip.
This is done only if the parameter 'Dip Autorestart Enable' is set.
Dip function is enabled.
Activate the automatic restart.
Voltage level indicating the begin of a voltage Dip
Voltage level indicating the end of a voltage dip.
Dip Autorestart Window
Undervoltage situation
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