Validity check (Default: basic validity check) : the validity check verifies that the data model follows the semantic rules for the model format.
validity check(默认值：basic validity check)：有效性检查，验证数据模型是否遵从模型格式的语义规则。
It includes element validity check, element quality check and element size check.
单元检查包括单元合法条件的检查，单元质量条件检查和单元尺寸检查。
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。
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。
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