Ansi Device Numbers Pdf

Letters are sometimes added to specify the application ieee standard c37 2 2008.

Ansi device numbers pdf. Ansi ieee standard device numbers in north america protective relays are generally referred to by standard device numbers. Comparison of ansi ieee with iec symbols 10 topic page changed title to specify protection and control 1 added additional bulletin numbers 1 updated year to c37 2 1996 2 added definition and function for device numbers 11 and 16 2 changed device number 34 definiti on to master sequence device 3 added clarification to ac circuit breaker 4. Device numbers are used to identify functions of devices shown on a schematic diagram. List of device numbers and acronyms.

Function descriptions are given in the standard. Ieee device numbers and functions ieee device numbers and func tions for switchgear apparatus the devices in switching equipments are referred to by numbers with appropriate suf fix letters when necessary according to the functions they perform. Ansi ieee c37 2 2008 is one of a continuing series of revisions of the standard which originated in 1928. These numbers are based on a system adopted as standard for automatic switchgear by ieee and.

In the design of electrical power systems the ieee device numbers identify features of a protective device such as relay or circuit breaker. 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. One physical device may correspond to one function number for example 29 isolating switch or. Device numbers the more commonly used ones are in bold 1 master element 2 time delay starting or closing relay.