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In response to industry power motor cannot directly starting and stopping issues, a high power motor intelligent protection controller based on PIC singlechip is proposed in this paper. Intelligent soft starter design principles based on PIC singlechip is articulated. The hardware circuit design, software flow design and test data analysis are given in details. By producting in Zibo Galaxy high-technology...
Motor circuits have a dynamic load profile that creates a fine line between acceptable inrush currents and damaging short circuits. Achieving a proper balance of protection, along with gaining National Electrical Code compliance can be a delicate balance. The setting of the motor circuit protector can lead to decisions between limiting the potential of a nuisance trip on start-up versus providing...
Starting medium voltage motors via autotransformers can result in high overvoltages owing to improper circuit breakers switching time before getting a significant speed, and multiple reignitions (Ahmed et al., 2005).The purpose of this paper is to show results of the study made to suppress these overvoltages that appear at the neutral point of the autotransformer in motor - autotransformer starting...
This paper provides an overview of the first order thermal model and discusses how to apply this model to motor protection in starting and running state. This paper also demonstrates the first order thermal model's response to cyclic load
Medium voltage fuses (1 kV-34.5 kV) of equal ratings are not all created equal. The assumed interchangeability of various vendors' medium voltage (MV) fuses may expose you and your medium voltage control equipment to undue stress and danger. This paper outlines the design characteristics, operating characteristics, selection criteria and failure modes of medium voltage power fuses when used in motor...
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