It can be combined with a set of transformer main protection by combining negative-phasesequence current sudden-change starting element.
它也可与负序电流突变量起动元件配合,构成一套变压器主保护。
2
Based on the analysis of main fault types of LV (Low Voltage) flameproof motor, the negativesequence protection principle is proposed for its asymmetric short circuit fault and open phase fault.
Zero-sequence current criterion, negativesequence current criterion and phase current variation can be used to improve the performance of breaker failure protection for ACF sub-bank.