DEMA 400 Series User Manual page 11

Introduction
400 series protection relays are the product of the combination of DEMA Relay's field
experience from 1977 to today with today's technology.
The 400 series protection relays have successfully passed the tests that carried out in the
accredited KEMA laboratories performing international standards tests and proved themselves
in this field.
This guide mentions about physical and general characteristics of the 400 series protection
relays along with protection functions, working principles of these functions, supported
communication protocols, automatic protection and configuration settings.
IEC61850, IEC60617 Symbols and IEE-ANSI Codes
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