Protection Engineering Basics and Schemes Protection Engineering | Page 196

6.2 Basic laws which Differential Relays follows

Kirchoff’ s law At particular node or section

Electrical Quantities enter in power system = Electrical Quantities exit from power system

6.3 Types of Differential Relays

� Current Differential Relay � Biased Differential Relay

6.3.1 Current Differential Relay:

Secondary of Two Current transformers are connected in series across protected unit.

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