railway RRB JE (CBT I + CBT II) Mock Test 2024 Electrical Machines Three Phase Induction Motor Induction Motor Speed Control
In a three-phase induction motor regenerative braking occurs when:
1
Load is lowered by a hoisting machine
2
Motor speed falls due to overload.
3
Load is raised by a hoisting machine
4
Number of poles is reduced in a pole changing machine