The validity check of zero-sequence operating direction for transformer directional over-current protection is also essential.
另外还需要进行变压器零序方向过电流保护动作方向正确性的检查。
Protection devices is equipped with zero-sequence differential protection for the auto-transformer.
而保护装置针对自耦变压器，还配置了零序差动保护。
And two draft resolutions were proposed trying to solve the problem of ct polarity checking in transformer zero-sequence differential protection.
对于零序差动保护的CT极性检测和校对问题，文中提出了两种自适应参考方案以供探讨。
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