Ansi Numbers Pdf

Device numbers are used to identify functions of devices shown on a schematic diagram.

Ansi numbers pdf. 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. In the design of electrical power systems the ieee device numbers identify features of a protective device such as relay or circuit breaker. Standards subscriptions from ansi provides a money saving multi user solution for accessing standards. Relay symbols and device numbers.

Ansi and the greater standardization community are stepping up with guidance resources and initiatives to support public health safety and infrastructure during the covid 19 outbreak. The specific standard s or collections of standards the number of locations accessing the standards and the number of employees that need access. As needs continue to emerge and standards based solutions are identified ansi is monitoring and sharing relevant news highlighting these efforts via a frequently updated collection of relevant announcements. One physical device may correspond to one function number for example 29 isolating switch or.

Subscription pricing is determined by. Ansi ieee standard device numbers in north america protective relays are generally referred to by standard device numbers. 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. Selection from iec 617 ieee c37 2 1991 and ieee c37 2 1979 1mrk 590 006 ben page 5 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.

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