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NEMA ABP 6 - What is the Purpose of a Molded Case Circuit Breaker?
January 1, 2015 - NEMA

Foreword This is an update to the NEMA white paper originally published in 1994. To ensure that a meaningful publication was being developed, draft copies were sent to a number of groups within NEMA having an interest in this topic. Their resulting comments and suggestions provided...

NEMA ABP 3 - Molded Case Circuit Breaker Systems Testing with Conductors
January 1, 2013 - NEMA

FOREWORD This is an update to the NEMA white paper originally published in 1994. To ensure that a meaningful publication was being developed, draft copies were sent to a number of groups within NEMA having an interest in this topic. Their resulting comments and suggestions provided...

NEMA AB 4 - Guidelines for Inspection and Preventive Maintenance of Molded Case Circuit Breakers Used in Commercial and Industrial Applications
January 1, 2017 - NEMA

NEMA AB 4 sets forth, for use by qualified personnel,1 a number of basic procedures that may be used for the inspection and preventive maintenance of molded case circuit breakers used in industrial and commercial applications rated up to and including 1000 V 50/60 Hz AC or...

NEMA ABP 4 - Taking the Guesswork out of Selecting and Maintaining Molded Case Circuit Breakers
January 1, 2013 - NEMA

Foreword This is an update to the NEMA white paper originally published in 1998. To ensure that a meaningful publication was being developed, draft copies were sent to a number of groups within NEMA having an interest in this topic. Their resulting comments and suggestions provided...

NEMA ABP 11 - Compatibility between Smoke Alarms and Arc-Fault Circuit Interrupters
January 1, 2016 - NEMA

Foreword This is an update to a NEMA white paper originally published in 2005. To ensure that a meaningful publication was being developed, draft copies were sent to a number of groups within NEMA having an interest in this topic. Their resulting comments and suggestions provided...

NEMA ABP 9 - Hazards of Working on Energized Electrical Equipment
January 1, 2015 - NEMA

Foreword This is an update to "Hazards of Working Electrical Equipment Hot," a NEMA white paper originally published in 1994. To ensure that a meaningful publication was being developed, draft copies were sent to a number of groups within NEMA having an interest in this topic. Their...

NEMA ABP 5 - Series Ratings
January 1, 2015 - NEMA

Foreword This is an update to a NEMA white paper originally published in 1994. To ensure that a meaningful publication was being developed, draft copies were sent to a number of groups within NEMA having an interest in this topic. Their resulting comments and suggestions provided...

NEMA KS 1 - Heavy Duty Enclosed and Dead-Front Switches (600 Volts Maximum)
January 1, 2013 - NEMA

This standards publication covers heavy duty enclosed and dead-front switches that are: a. Rated at not more than 600 volts and 4000 amperes with or without a horsepower rating. The dc ratings shall be up to and including 600 volts, 1200 amperes. b. With or without provision for fuses c. With...

ANSI C37.51 - Switchgear — Metal-Enclosed Low Voltage AC Power Circuit Breaker Switchgear Assemblies — Conformance Test Procedures
January 1, 2018 - NEMA

This Standard is a conformance testing Standard optionally applicable to all metal-enclosed low-voltage ac power circuit breaker switchgear assemblies designed, tested, and manufactured in accordance with IEEE Std C37.20.1, Metal-Enclosed Low-Voltage AC Power Circuit...

IEEE C37.27 - Guide for Low-Voltage AC (635 V and below) Power Circuit Breakers Applied with Separately- Mounted Current-Limiting Fuses
December 5, 2015 - IEEE

This guide applies to unfused low-voltage ac power circuit breakers of the 635 V maximum voltage class with separately-mounted current-limiting fuses for use on ac circuits with available short-circuit currents of 200 000 A (rms symmetrical) or less. Low-voltage ac fused...

NEMA AB 1 - Molded-Case Circuit Breakers, Molded Case Switches, and Circuit-Breaker Enclosures
January 1, 2002 - NEMA

The requirements of this standard cover molded-case circuit breakers, circuit breaker and ground-fault circuit-interrupters, fused circuit breakers, and accessory high-fault protectors. These circuit breakers are specifically intended...

MIL-B-9895 - BEAD BREAKER, HYDRAULIC, PNEUMATIC TIRE
October 27, 1960 - NPFC

This specification covers one type of hydraulic aircraft tire bead breaker to accomodate tires from 34″ O.D. to 56″ O.D.

ANSI C37.50 - Switchgear - Low Voltage AC Power Circuit Breakers Used in Enclosures - Test Procedures
January 1, 2018 - NEMA

This Standard covers the test procedures for enclosed low-voltage AC power circuit breakers as follows: a. Stationary or drawout circuit breakers of two-or-three- or four-pole construction, with one or more rated maximum voltages of 1058 V, 730 V, 635 V (600 for units...

ANSI/NEMA C37.50 - Switchgear - Low Voltage AC Power Circuit Breakers Used in Enclosures - Test Procedures
January 1, 2012 - NEMA

This standard covers the test procedures for enclosed low-voltage ac power circuit breakers as follows: a) Stationary or drawout circuit breakers of two-or three- or four-pole construction, with one or more rated maximum voltages of 635 V (600 for units incorporating...

ANSI C37.51A - For Switchgear - Metal-Enclosed Low-Voltage AC Power Circuit Breaker Switchgear Assemblies-Conformance Test Procedures Amendment 1: Short-Time Withstand Current Tests
January 1, 2010 - NEMA

Foreword This amendment has been developed to coordinate selected conformance tests and procedures with ANSI/IEEE C37.20.1-2002 Metal-Enclosed Low-Voltage AC Power Circuit Breaker Switchgear, and particularly, to recognize the amendment C37.20.1a-2005. C37.51 is published separately...

Power Circuit Breaker Theory and Design
January 1, 1982 - IET

The book has 13 chapters and the following topics are dealt with: development of circuit breakers; physics of circuit breaker arcs; network switching conditions; oil circuit breakers; air break circuit breakers; air blast circuit...

NEMA SG 3 - Power Switching Equipment
January 1, 1995 - NEMA

This standards publication covers: a. Low-voltage power circuit breakers rated 1000 volts AC or less: 1. Low-voltage AC power circuit breakers 2. Low-voltage AC integrally fused power circuit breakers 3. Low-voltage AC power circuit protectors 4....

NEMA SG 4 - Alternating Current High-Voltage Circuit Breakers
January 1, 2009 - NEMA

This standards publication encompasses: a. All ratings for outdoor circuit breakers above 1000 volts for alternating-current service. Circuit breakers for service in metal-enclosed or metal-clad enclosures and automatic circuit reclosers are excluded. b....

NEMA AB 5 - Establishing Levels of Selective Coordination for Low Voltage Circuit Breakers
January 1, 2011 - NEMA

The scope of this standard includes all types of circuit breakers listed to: 1) The UL 489 Molded-Case Circuit Breakers, Molded-Case Switches and Circuit-Breaker Enclosures 2) The UL 1066 Standard for Safety Low-Voltage AC and DC Power Circuit...

NEMA SG 11 - Guide for Handling and Maintenance of Alternating Current Outdoor High-Voltage Circuit Breakers
January 1, 2013 - NEMA

This document provides information on receiving, storage, handling, installation, inspection, and maintenance of alternating current outdoor high-voltage circuit breakers. It is impossible to cover here in detail all guidelines for each of the different types of circuit...

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