We offer the customers hopkinsons test dc machine. The hopkinsons test dc machine designed to demonstrate the fundamental concepts and also facilitates easy learning about the various losses of dc machine. One can also determine the efficiency of dc machine by separately calculating the losses. technical specifications200 v fixed dc : 0 - 200 variable dctype : dc shuntvoltage rating : 200 vrpm : 1500 (no load)insulation : class 'b', fvoltmeter : 300 vammeter (2 nos.).