Over current protection, negative current protection, zero sequence current protection, over time of start protection and low voltage protection is configured in the device.

本装置配有过流保护、负序电流保护、零序电路保护、起动时间过长保护、低电压保护。

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Based on the symmetry component theory, a method of the motor protection is presented by measuring positive, negative and zero sequence current component.

基于对称分量法理论，提出了基于检测正序、负序、零序电流分量的电动机保护方法。

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Zero-sequence current criterion, negative sequence current criterion and phase current variation can be used to improve the performance of breaker failure protection for ACF sub-bank.

针对单纯采用相电流判据的不足之处，本文提出增加零序电流、负序电流及电流变化量判据，以有效地避免保护误动或者拒动。

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Inflation-linked bonds also offer protection but their current real yields are very low or even negative.

ECONOMIST: Buttonwood