load test on dc shunt generator is a test to plot the internal and external characteristics of the generator.
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dc shunt generator, if rotation is reversed and field connection also reversed, what happened to output voltage?
in swin burn test we find out the copar loses & iron loses of the dc generator
See the diagram linked below.
Brake test is used to determine the efficiency of comparatively small motors. The motor is loaded directly by means of a mechanical brake (load) or by means of an eddy current or a calibrated air fan.
Any voltage source, whether a generator or a battery, will NOT supply an output current unless it is connected to a load. So the only way to test the output current is by connecting it to a load.
A bench and no load! Whatever you are testing has no load. It might be a generator or a motor for example. If a motor it wouldn't be connected to anything. If a generator it would have nothing plugged in.