In recent years there have been reports regarding the tripping of instantaneous trip devices when starting energy-efficient motors. In the following we will examine the relationships of several motor parameters involved in this issue and examine several suggestions as to how to resolve the problem. It is hoped that the above has provided some insight into the relationship between full-load locked-rotor and transient inrush currents. There is a need to recognize these relationships. More importantly the increased use of energy-efficient motors is certainly creating installation problems which must be recognized. As we have seen it is presently impossible for some motors to be started if all rules of the NEC are followed. This is not a good situation.
Motor starting coordination
Anlaufprobleme bei Motoren in schwachen Netzen
1986
5 Seiten, 6 Bilder, 5 Tabellen, 3 Quellen
Conference paper
English
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