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Originally from Engineering Notes 050 -- January 27, 1994 Sensor Dimmer Module BTU Dissipation Sensor dimmer efficiency evaluation The following table provides information on the thermal efficiency of ETC Sensor dimmer racks. All dimmer efficiencies are measured at maximum current (full load). Note that...
Prior to 1998 all breakers were D curve. Since 1998 all single pole breakers have been changed to C curve. All double pole breakers are still D curve. C & D Curves are defined by a European Standard. A is the fastest curve, D is the slowest.