IS 3842 : Part 4 : 1966 : Application Guide for Electrical Relays for ac Systems - Part 4 : Thermal Relays

1. Scope

1.1 This guide ( Part IV ) deals with application of thermal relays for ac systems covered by IS : 3231-1965*.

1.2 This guide does not cover:

a) the principles of system design and system protection, and

b) application of such relays which form an integral part of a motor starter.