Basic Signalling Concepts - Interlocking

                      INTERLOCKING .

" The safe reception of train and safe depture of an train is called Interlocking ".

There Many other Definition  were Exists. 

In particularly India  Signalling History there are  3 to 5 Interlocking types are Exists .

1. LEVER INTERLOCKING. 

2.PANEL INTERLOCKING(PI)

3.ROUTER RELAY INTERLOCKING(RRI)

4. ELECTRONIC  INTERLOCKING(EI) ALSO SOMETIME REFERENCE AS SOLID STATE INTERLOCKING(SSI).

Later in this tutorial  we will discuss breifly about this interlocking principles and operations.