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ACB Interlocking.By : Sankalp - 21-Jun-2018 
What is the difference between electrical interlocking and mechanical interlocking between ACBs?
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Sankalp26-Jun-2018

In simple words.
Mechanical interlocking involves key system and the process of changing, opening and closing the circuit is mechanical. Extra manpower is required in switching operation of the circuit.

Electrical interlocking is automation in interlocking and switching operation is performed automatically and electrically. In this systems responds according to the signal sent electrically.
Please correct if I'm wrong.