DC Generators
The commutator segments are connected to the armature conductors by means of

Copper lugs
Resistance wires
Brazing
Insulation pads

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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 generated e.m.f.
To increase the series flux
To reduce the combined effect of armature reaction of both the machines

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