The "target" is the small flag that drops when the relay trips. It's operated by a small "indicating contact switch" that is operated by the control power current going to the breaker trip coil. It generally also contains a contact seal-in unit to shunt the initiatng contact. Generally a 0.2 A and a 2.0 A tap IIRC. The 2.0 A tap is generally used if the relay is directly tripping a circuit breaker. The 0.2 A can be used when there is an interposing relay involved that would not draw enough current to actuate the unit if on the 2.0 A tap. These are generically known as "clapper" relays. These are only seen on old electromechanical relays.
Relay is tested at different taps and finally at the tap that is intended to be set as per approved protection relay setting study.
I thought Target tap refers to that approved setting!!
