ABB UMC100-FBP - Page 56

- 56 -UMC100-FBP
Universal Motor Controller
UMC100-FBP
Technical Description
FieldBusPlug / Issue: 03.2012
U
Dip Restart Level
Dip Level
UMC Relay Out
Undervoltage situation
Dip Autorestart Window
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.
Parameter Description
Parameter Explanation
Dip Duration If the voltage dip is longer than this time a 'Dip Duration' error is
triggered.
Dip Autorestart Window If the voltage recovers within this time the motor is not switched
off - i.e. the UMC output relay is switched on.
Dip Autorestart Delay 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 Enable Dip function is enabled.
Dip Autorestart Enable Activate the automatic restart.
Dip Level Voltage level indicating the begin of a voltage dip
Dip Restart Level Voltage level indicating the end of a voltate dip.
Depending on the duration of a voltage dip and the parameters above different reactions can be config-
ured.
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