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  • Users: Arba
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  1. Arba

    Under Voltage Protection

    Anybody can tell me if I set to block the under voltage protection on a main 5 KV BUS, when one of the relay PT fuses would blows (The 27 Relay has the feature to supervise the PT voltage), with the excuse that probability of two events: under voltage phenomena and PT Relay Disruption happening...
  2. Arba

    600 V Bus voltage fluctuation is 12%

    I’m having a case where from my power monitoring on the main 4000 Amp, 600 V bus fed from a 4MVA, 44KV – 600 V Transformer I see a lot of harmonic generation from a 300 KVA compressor, and different electric welding machines of the plant. The average voltage during one week monitoring is just...
  3. Arba

    Grounded Y û Y MV transformers compare to ? û Y gounded Tr

    Would any body tell me what are the benefits of both grounded Y – Y medium voltage transformers compare to generally used ? – Y grounded transformer?

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