Which is indicated the power consumption of the relay circuit element? 

The correct answer is option 2

Concept : 

The burden of protective relay

• In a current transformer (CT), there is a lesser turn on the primary side than on the secondary.
• Bar primary is a term given to CT having a single(1) primary turn.
• This is done to lower the current in the secondary for ease of current measurement by CT. 
• There should always be a resistive element in the secondary so that the secondary never be open circuited with the current becoming almost zero and voltage becoming very high which can damage the insulation
• a resistor is called a burden as it is always present and draws power.

Explanation :

• Since Burden is a resistive element always absorbs power.
• Power is absorbed by a relay circuit and used to trip the circuit breaker.
• It is measured by a V-A