Which relay is used for long transmission line?

The relay which is selected for a long transmission line should be less affected due to power swings. Hence Mho relay is preferred. Impedance relay is suitable for medium transmission lines….

Transmission line	Length & Operating voltage	Distance Relay
Long-line	(>200) km (>100) kV	Mho relay

Which type of relay is used for protection of transmission line?

distance relay
Introduction. A distance relay is a type of protection relay most often used for transmission line protection. Distance relays measure the impedance from the installation side to the fault location and operates in response to changes in the ratio of measured current and voltage.

Which relay is used in short transmission lines?

Reactance relay
Reactance relay is used for the phase faults in a short transmission line.

Why MHO relay is used in long transmission line?

The working principle of Mho relay is, it used for long-distance transmission lines because these lines generally experience power swinging transients as well as load shedding problems. Thus, mho relays are used in practice to provide improved accuracy whenever these transients occur.

Which of the following relay is used on long transmission line Mcq?

9. Which of the following relay is used for phase fault protection of long transmission lines? (a) Reactance relay.

Why Mho relay is used in long transmission line?

What is Mho relay?

Mho relay is a voltage restrained directional relay. Important Points: Reactance relay is suitable for the protection of a short transmission line because its operation is independent of arc resistance. The relay which is selected for a long transmission line should be less affected due to power swings.

What is mho relay?