Ansi Codes For Relay Identification

In the design of electrical power systems the ansi standard device numbers ansi ieee standard c37 2 standard for electrical power system device function numbers acronyms and contact designations identifies the features of a protective device such as a relay or circuit breaker these types of devices protect electrical systems and components from damage when an unwanted event occurs such.

Ansi codes for relay identification. Relay symbols and device numbers. Ece 525 session 3 page 1 1 power systems protection and relaying fall 2018 ansi ieee standard device numbers in north america protective relays are generally referred to by standard device numbers. It allows you to add the most consulted relay codes to favorites and share them by mail whatsapp among others. A 27 59 device for example.

Multifunction relays have combinations of device numbers. 32 directional power relay 32l. Gedigitalenergycom 1 ansi standard device numbers common acronyms suffixes description 1 positive sequence 2 negative sequence a alarm auxiliary power ac alternating current an anode b bus battery or blower bf breaker failure bk brake bl block valve bp bypass bt bus tie bu backup c capacitor condenser compensator carrier current case or compressor ca cathode ch check valve. This app shows the relay codes used in electrical protections according to the ansi standard.

1 main relay code. For example a time overcurrent relay is designated a 51 device while an instantaneous overcurrent is a 50 device. Home ansi codes device designation numbers in the design of electrical power systems the ansi standard device numbers ansi ieee standard c37 2 denote what features a protective device supports such as a relay or circuit breaker.