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Module of the rated currents - transformer:
The transformer of the Face(Figure) 2 is a transformer of type Delta-Y (the neutral of Y is grounded). The rated output is of 1500 kVA, the rated voltages are 12.5 kV in the primary and 480 V in the secondary and the equivalent reactance of direct sequence of the transformer is 5 %.
1-What is the module of the rated currents associated with the rolling-ups in the primary?
2-What is the number format which corresponds to this connection of the transformer according to the principle of the clock?
3-What is the rate of the rolling-ups between the primary and secondary?
Is there an opto-coupler that has a blocking voltage, VRRM, of greater than 800 volts? Perhaps, 1200 or 1600 volts? The manufacturer?
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modes of operation of 8255
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