Category: Protection and Switch gear.

Busbar Protection

The protection scheme for a power system should cover the whole system against all probable types of faults. Unrestricted forms…

Transformer differential protection

the different turns ratio, the currents fed into the pilot wires from each end are same under normal conditions so…

Transformer Protection

Earth fault protection of Generators

The neutral point of the generator is usually earthed, so as to facilitate the protection of the stator winding and…

Generator Protection

Introduction ·         The range of size of generators extends from a few hundred KVA to more than 500MVA ·         Small and Medium…

Modulator

The Schematic of CCE

Carrier Current unit protection system

Pilot wire schemes for feeder protection

In differential protection scheme, the current entering at one end of the line and leaving from other end of the…

Protection Of Feeders

Over current and earth fault protection It is customary to have two elements of over current and one element of…

Comparators

Looking at the general torque equation and any of the other relays used, it can be seen that the net…

Setting of differential relay

The separate blocking relay in series with the differential relay is used. The operation of this relay is based on…

Magnetizing current inrush

When the transformer is energized, the condition initially is of zero induced E.m.f. A transient inflow of magnetizing current occurs…