Consider the following statements and choose the correct option:Statement 1: The magnitude of earth fault current for a given fault position within a winding depends upon the method of neutral grounding.Statement 2: Earth fault protection for an electric motor is provided by means of instantaneous overcurrent relay.

• A. Statement 1 is FALSE and Statement 2 is TRUE
• B. Both Statement 1 and Statement 2 are TRUE
• C. Both Statement 1 and Statement 2 are FALSE
• D. Statement 1 is TRUE and Statement 2 is FALSE

Answer: (D)

The magnitude of earth fault current for a given fault position within a winding demands upon the winding connections and method of neutral grounding.
Earth fault protection for an electric motor is provide by instantaneous relay having a setting of approximately 30% of motor rated current in the residual circuits of two CTs and with ground wire.