Skip to main content

ANSI DEVICE NUMBER CODES

ANSI Device 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). 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 the functions of devices shown on a schematic diagram. Function descriptions are given in the standard. continue..



Device numbers may be combined if the device provides multiple functions, such as the instantaneous/time-delay AC over current relay denoted as 50/51 continue..


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). 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 the functions of devices shown on a schematic diagram. Function descriptions are given in the standard. ANSI/IEEE C37.2-2008 is one of a continuing series of revisions of the standard, which originated in 1928. continue..


Part 1 for ANSI device numbers. continue..


Part 2 for ANSI device numbers. continue..


The ANSI numbering system is a standard numbering method used on certain electronic power systems and machines. The ANSI system originated in the early 1900s, and is still a common form of denotation. The ANSI system is a creation of the Institute of Electrical and Electronics Engineers (IEEE), which has continued to revise and revive the code over the years. Today, the ANSI numbering system helps engineers and technicians draw up simple schematics without using entire names. The system is used to draw simple electronic circuits. To understand the system you need to familiarize yourself with the number descriptions. continue..


Device numbers may be also use in designing electrical distribution system like:
 27 - Undervoltage
47 - Phase sequence
49 - Thermal overload
50 - Instantaneous
51 - Time overcurrent
59 - Overvoltage
63 - Sudden pressure
67 - Directional overcurrent
86 - Lockout
87 - Differential
continue..

Comments

  1. Great Blog,Thanks for sharing such beautiful information with us. I hope to will share some more information about Electrical Arc Flash Video. Please visit our website Electrical Arc Flash Video

    ReplyDelete

Post a Comment

Popular posts from this blog

FRUITS AS BATTERY AND SOURCE OF ELECTRICITY

Electric Fruits Project   The purpose of this project was to find out which fruit would generate enough electricity to light a light bulb and to discover which fruit would light the bulb the longest. To conduct my experiments I used a Multimeter, copper and zinc wires & electrodes, alligator clips with leads, various light bulbs and five types of fruits. continue.. Why Do Citrus Fruits Produce Electricity?   In order to generate electricity, there must be a power source and a complete circuit. When using a citrus fruit to create electricity, these rules still apply. In a simple experiment using a citrus fruit, the components of the circuit include: a lemon or other fruit, wire, two different metal elements and a small light bulb. The lemon in this circuit serves as the battery and power source. continue.. Fruit Power Project   Purpose To demonstrate how an electrical current can be generated using citrus fruits (such as lemons or li...

POWER SYSTEMS LOSS.COM: LOSSES IN ELECTRICAL SYSTEM

What is powersystemsloss all about?    System's loss reduction is now one of the most growing trends in every electric distribution utility. Primarily triggered by economics and regulation concerns, Transmission and Distribution companies now sets more focus in reducing losses and become as an efficient utility as possible in delivering power. Information found in this site will be very useful not only to electrical practitioners but it is also our goal to help students better understand the actual world. Thank you and lets all enjoy learning! continue..   Back to basic    n case you don't know, the power we get from our household electrical outlet didn't just appear in the thin air. It may appear that it is coming out from our walls but we all know that looks can be deceiving. Before reaching our respective homes, electric current passes through miles and miles of c...

RESISTOR : DEFINITION AND COLOR CODE

What is a Resistor? http://en.wikipedia.org   A resistor is a two-terminal passive electronic component which implements electrical resistance as a circuit element. When a voltage V is applied across the terminals of a resistor, a current I will flow through the resistor in direct proportion to that voltage. This constant of proportionality is called conductance, G. The reciprocal of the conductance is known as the resistance R, since, with a given voltage V, a larger value of R further "resists" the flow of current I as given by Ohm's law: Resistor Symbol http://www.rapidtables.com   Click the title above to view the Resistor schematic symbols of electrical & electronic circuit diagram - resistor, potentiometer, variable resistor. History of Resistor Color Coding http://www.matni.com   Click the title above to view the brief history of the resistor's color coding. History of Resistor http://people.usd.edu   In the very early days resistors used to resemble w...