This control operates two 15kV 600A three pole switches in a resistor insertion switch arrangement for transient in-rush control.  The control first closes one switch through 80ohm resistor modules.  One hundred milliseconds later, the control closes a second switch bypassing the resistors.

To Arc Furnaces 15kV or 15 MVA and Less

To Arc Furnaces 15 to 46 kV and Greater Than 15 MVA

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