100kVA above the transformer grounding resistance is how much
4.2.1 low-voltage power equipment grounding device grounding resistance, should not exceed 4 Europe. The use of the same grounding device parallel operation of the generators, transformers and other electrical equipment, when its total capacity does not exceed 100 kVA, the grounding resistance should not be greater than 10 Europe. Meaning is clear, that is, more than 100kVA, the grounding resistance should not exceed 4 oh ah.
National specifications for electrical equipment grounding resistance requirements: 4.1.1 parallel operation of the transformer and other power equipment capacity of not more than 100 kVA, the grounding resistance should not exceed 10 Europe.
100kVA above the transformer grounding resistance should not exceed 10 Europe.
Transformer (Transformer) is the use of electromagnetic induction principle to change the AC voltage of the device, the main components are primary coil, secondary coil and core (core). The main functions are: voltage conversion, current conversion, impedance conversion, isolation, voltage regulator (magnetic saturation transformer) and so on. According to the purpose can be divided into: power transformers and special transformers (electric furnace change, rectifier, frequency test transformer, voltage regulator, mine transformer, audio transformers, IF transformers, high-frequency transformers, impact transformers, instrument transformers, electronic transformers , Reactors, transformers, etc.). Circuit symbols commonly used as the beginning of the number. Example: T01, T201 and so on.
