| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | See Detail | Status | Related Standard |
| GB 20840.4-2015 | English | 579 |
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Days<=4
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[GB/T 20840.4-2015] Instrument transformers -- Part 4: Additional requirement for combined transformers
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GB 20840.4-2015
| Valid |
GB 20840.4-2015
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