Phasecomparisonprotection where the comparison is made twice per cycle.
每周期比较两次的相位比较保护。对正半周和负半周各比较一次。
2
That can be regarded as a phasecomparisonprotection and also has the function of amplitude comparison.
它具有相位比较的功能，也兼有幅值比较的作用。
3
Seeing that the importance of the bus protection wiring in bus coupler current phasecomparison, in this paper an on-load testing verifying its wirings is introduced.