Ansi Device Codes

Device numbers the more commonly used ones are in bold 1 master element.

Ansi device codes. 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. Ansi ieee function codes also find application in relay trip circuit diagrams. The terminal interprets these sequences as commands rather than text to display verbatim. 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 ieee standard device numbers in north america protective relays are generally referred to by standard device numbers. These types of devices protect electrical systems and components from damage when an unwanted event occurs such as an electrical fault. Device numbers are used to identify functions of devices shown on a schematic diagram. 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.

Protection relay ansi standards. Consider the following example of an electromechanical time overcurrent function 51 relay set monitoring current through three power conductors and tripping the circuit breaker device 52 if the current in any line exceeds safe levels. Letters are sometimes added to specify the application ieee standard c37 2 2008. The widely used united sates standard ansi ieee c37 2 electrical power system device function numbers acronyms and contact designations deals with protective device function numbering and acronyms.

One physical device may correspond to one function number for example 29 isolating switch or. Even in those parts of the world where iec standards are. Ansi is excited to introduce you to our redesigned website. In the design of electrical power systems the ansi standard device numbers denote what features a protective device supports such as a relay or circuit breaker.