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

Brazing
Insulation pads
Copper lugs
Resistance wires

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

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

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