On a relay calibration sheet - what does the term "Target Tap" refer to ? 1

[bdn2004]

This is an electromechanical relay.

 

[dpc]

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.

 

[RRaghunath]

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!!

 

[dpc]

I thought Target tap refers to that approved setting

Nope.