DC Generators
When two D.C. generators are running in parallel an equalizer bar is used

So that the two identical machines will pass approximately equal currents to the load
To increase the series flux
To increase the generated e.m.f.
To reduce the combined effect of armature reaction of both the machines

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DC Generators
In a D.C. generator

Internal characteristic = magnetization characteristic ohmic drop
Magnetization characteristic = external characteristic
External characteristic = magnetization characteristic ohmic drop armature reaction
External resistance = internal characteristic armature reaction

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