Protection Engineering Basics and Schemes Protection Engineering | Page 73

Chapter 3
Engineering Drawing
Drawing is like X-Ray for engineers of power grid.
Engineer can examine the three different aspect or
classes of grid equipments, whenever we are working in
power grid or any master substation we need to
concentrate on
 Equipment which need to be protected
 Equipment which need to be sensed
abnormal/normal Condition
 Equipment need to be take action in case of
normal/abnormal condition
Basically in every substation there are




Sensing panel(Relays)
Control Panels
Action Panels (Circuit breakers, contactors etc.)
Auxiliary Circuits (latching relays, timing relays,
Sockets etc.)
These all are interconnected, and modern relays make it
easy for Grid peoples as it provide multi-function in one
package.
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