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In North America protective relays are generally referred to by standard device numbers. Letters are sometimes added to specify the application (IEEE Standard C37.2-2008).
ANSI device numbers
When one device performs several protective functions, it is typically denoted "11" by the standard as a "Multifunction Device", but ANSI Device Numbers are still used in documentation like single-line
ANSI codes and IEC Relay Symbols – Electrical Engineering
To assist the Protection Engineer in converting from one system to the other, a select list of ANSI device numbers and their IEC equivalents are given in the following figure.
Protection Relay
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). These types of
ANSI Standard Device Numbers & Common Acronyms
ANSI Standard Device Numbers & Common Acronyms ANSI Standard Device Numbers & Common Acronyms
ANSI Relay Function Codes Overview | PDF | Relay | Direct Current
It includes definitions for specific protection relays, such as overcurrent and differential protection, along with their applications in industrial circuits. Additionally, it outlines various acronyms related to
Protection relay selection table
Protection relay selection table Please note before using selection table! number = Number of stages, shots, X = Function supported inputs or outputs O = Function available as option
ANSI Device Numbers and Acronyms
The ANSI standard device numbers ( As per ANSI/IEEE standard C37.2) are used in the design of an electrical power system. These devices protect the electrical network in the case of a
Table of ANSI IEEE Standard Device Numbers
When one device performs several protective functions, it is typically denoted "11" by the standard as a "Multifunction Device", but ANSI Device Numbers are still used in documentation like single-line
Table of ANSI IEEE Standard Device Numbers
This table details ANSI IEEE Standard Device Numbers as used for protective relaying in North America. Suffixes for numbers are also suggested.
Protection and Control Device Numbers and Functions
This publication contains new and updated information as indicated in the following table. The protection and control devices in electrical equipment can be referred to by numbers, with appropriate suffix
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