Executive Instrumentation
Executive Instrumentation Interview Questions and Answers
Updated 2 Apr 2020
Q1. 1.Explain ladder diagram for starting a motor.Using interlock
Ans.
Ladder diagram is a graphical representation of a motor control circuit using interlocks.
Ladder diagram consists of rungs that represent the control circuit.
Interlocks are used to prevent simultaneous operation of conflicting devices.
Motor starter is used to start and stop the motor.
Interlocks can be implemented using mechanical or electrical means.
Example: A motor cannot be started if the door of the control panel is open.
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