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  1. golruss

    Phasing

    Thanks for all the responce, I went to the site today and found that there is indeed a synch check relay ABB 25S. The problem is after the passage of the hurricane the utility supply was lost (broken conductors and down poles). The utility supply is actually the emergency supply and is only used...
  2. golruss

    Phasing

    Hi All, I was just wondering whats the best way to ensure phasing is correct between two sources, one is the ultility and the other is a emergency generator. Source voltages are 4160v and has two sets of PTs connected Open Delta with B-phase grounded on each. I was thinking of doing a rotation...
  3. golruss

    ct polarity testing

    Hi I have a 230 kv ABB SF6 bkr to install and polarity teting of the bkr. CTs are required. I would like to use a lantern battery and a analog voltmeter connected to the secondary of the ct while flashing the primary with the battery. Confirm if I am doing this test correctly. Thanks
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