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everyone! why m.s.j's topics or similar topics were locking?do you know?Is it related to their nationality?

EMC and Electronic grounding The electronic control systems in one power plant are digital base and separated "one point" grounding system is considered for it. In that power plant, the separated hole of electronic grounding is located far from control room, therefore the used cables for...

Protection of short line between power plant and substation The high voltage substation of power plant is usually built near it and the generated electrical energy in each power generation unit is transferred to substation by one short transmission line. The many different protection methods...

Measuring of generator winding resistance Recently I participated in a generator electrical test program. Measuring of Stator winding resistane is also of the mentioned tests. The recommended test procedure by manufacturer to calculate winding resistance is wattmeter method. In this method...

Yes,it is YnYn transformer. Thank you

Thank you, your answer is correct. For similar electrical discussions please refer to http://electrical-riddles.blogfa.com BEST REGARDS M.S.J

Voltage transformers are occasionally used to adapt voltage protective relays and instruments with nominal voltage of main circuit in low voltage switchgears. In an electrical panel test program an interesting thing was observed. In the panel a three phase voltage transformer with following...