Adit means " walks beside him"
An adit is a horizontal access shaft to an underground mine.
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Normally the Over current relay is connected using a suitable CT (Current Transformer). Say the CT ratio is 100/5 Amps. (secondary is normally 5 or 1 amps). 100 Amps in the primary induces 5 amps in secondary which flows through over current relay circuit. Secondary current is proportional to the primary current. To test the OCR , inject the current into relay circuit ranging from 0 to 5 amps in steps (which represents upto full load current on primary). Relay will operate accordingly operate the trip contacts. These relays are normally with a time factor setting as well.
It's an ADIT
A horizontal entrance to a mine is known as an adit.
IF answer is yes . please explain how we can measure in primary side ??
YES
use secondary injection test with pilots connected.
a dude
the ref relay rct secondary output how much current
adit