NEMA AB 1
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
Molded-Case Circuit Breakers, Molded Case Switches, and Circuit-Breaker Enclosures
23-07-2013
27-10-2004
Scope
Purpose
1 References, definitions, abbreviations and symbols
References
Definitions
Abbreviations and symbols
2 General
Characteristics of molded case circuit breakers
and molded case switches
3 Construction requirements
General
Corrosion protection
Operating mechanism
Spacings
Wire connectors
4 Performance requirements and verification tests
General
Standard design verification tests
Rated short-circuit current tests
5 Periodic verification tests
6 Field tests
7 Specific application circuit breakers
General
Instantaneous trip circuit breakers
Integrally fused circuit breakers
Current limiting circuit breakers
Marine circuit breakers
Mining circuit breakers
Molded case switches
Electronic trip unit circuit breakers
Switching duty circuit breakers
Circuit breakers having a short-time withstand
current rating
8 Accessories
General
General requirements
Shunt-trip release
Undervoltage trip release
Auxiliary and alarm switches
Electrical operator
Fuse accessory package
Mechanical interlock
Handle lock
9 Circuit breaker and molded case switch enclosures
Enclosures for general use
Test enclosures
10 Marking requirements
Circuit breaker marking(s)
Molded case switch marking(s)
Accessory marking(s)
Marking of enclosures
Marking information
11 Determination of short-circuit current, power
factor, and recovery voltage
Instrumentation
Circuit conditions
Alternating current circuits of 10,000 Amperes or
less
Alternating current circuits of greater than
10,000 Amperes
Recovery voltage
Direct current calibration
12 Clearances and creepage distances for circuit
breakers
Appendix
A Determination of short-circuit currents in low-
voltage systems
Three-phase systems
Single-phase, 3-wire, 120/240-volt systems
This Standard is no longer for sale on the NEMA website. NEMA AB 1 is equivalent to the current edition of UL 489. To purchase this Standard, click here or contact IHS at 800-854-7179 or 303-397-7956 (outside the U.S.)
| DocumentType |
Standard
|
| PublisherName |
National Electrical Manufacturers Association
|
| Status |
Withdrawn
|
| MIL-C-13962 Revision B:1966 | CRUSHING, SCREENING, AND WASHING PLANTS, DIESEL-ENGINE AND ELECTRIC-MOTOR DRIVEN, 225-TONS PER HOUR |
| ANS 57.7-1988(R1997) | DESIGN CRITERIA FOR AN INDEPENDENT SPENT FUEL STORAGE INSTALLATION (WATER POOL TYPE) |
| IEEE 241 : 1990 | ELECTRIC POWER SYSTEMS IN COMMERCIAL BUILDINGS |
| MIL-G-19826 Revision F:1984 | GENERATOR SET, DIESEL ENGINE, ALTERNATING CURRENT FOR FACILITIES CONSTRUCTION, 1O KW THRU 500 KW (NOT STOCKED) |
| IEEE 902-1998 | IEEE Guide for Maintenance, Operation, and Safety of Industrial and Commercial Power Systems (Yellow Book) |
| IEEE 141 : 1993 | IEEE Recommended Practice for Electric Power Distribution for Industrial Plants |
| IEEE 242-2001 | IEEE Recommended Practice for Protection and Coordination of Industrial and Commercial Power Systems (IEEE Buff Book) |
| OO-P-2895 Base Document:1997 | PLANT, AGGREGATE, SECONDARY, WITH CONE CRUSHER, MOBILE, 75 TON PER HOUR CAPACITY |
| IEEE 551 : 2006 | CALCULATING SHORT-CIRCUIT CURRENTS IN INDUSTRIAL AND COMMERCIAL POWER SYSTEMS |
| CC-G-2745 Base Document:1984 | GENERATOR SETS, DIESEL ENGINE, ALTERNATING CURRENT, FOR FACILITIES CONSTRUCTION; 10 KW THROUGH 1000 KW (NOT STOCKED) |
| MIL-PRF-32109 Base Document:2002 | FLOODLIGHT SET, ELECTRIC, PORTABLE |
| NEMA SM 24-1991 (R1997, R2002) | LAND BASED STEAM TURBINE GENERATOR SETS 0 TO 33,000 kW |
| NEMA PB 1:2011 | Panelboards |
| NEMA KS 1:2013 | Heavy Duty Enclosed and Dead-Front Switches (600 Volts Maximum) |
| NEMA AB 5-2011 | Establishing Levels of Selective Coordination for Low Voltage Circuit Breakers |
| NEMA ICS 2:2008 | Controllers, Contactors and Overload Relays Rated 600 V |
| NEMA ICS 2-1996, Part 8 (R2004, R2009) | INDUSTRIAL CONTROL AND SYSTEMS CONTROLLERS, CONTACTORS, AND OVERLOAD RELAYS RATED NOT MORE THAN 2000 VOLTS AC OR 750 VOLTS DC- PART 8: DISCONNECT DEVICES FOR USE IN INDUSTRIAL CONTROL EQUIPMENT |
| NEMA BU 2 : 1996 | MAJOR REQUIREMENTS RELATED TO THE APPLICATION AND TESTING OF LOW VOLTAGE BUSWAY |
| ANSI/NEMA AB 3:2013 | Molded-Case Circuit Breakers and Their Application |
| IEEE 1205-2014 | IEEE Guide for Assessing, Monitoring, and Mitigating Aging Effects on Electrical Equipment Used in Nuclear Power Generating Stations and Other Nuclear Facilities |
| IEEE C37.26-2014 | IEEE Guide for Methods of Power-Factor Measurement for Low-Voltage (1000 V AC or lower) Inductive Test Circuits |
| IEEE 1818-2017 | IEEE Guide for the Design of Low-Voltage Auxiliary Systems for Electric Power Substations |
| IEC 60898:1995 | Electrical accessories - Circuit-breakers for overcurrent protection for household and similar installations |
| NEMA 250 : 2014 | ENCLOSURES FOR ELECTRICAL EQUIPMENT (1000 VOLTS MAXIMUM) |
| IEC 60947-1:2007+AMD1:2010+AMD2:2014 CSV | Low-voltage switchgear and controlgear - Part 1: General rules |
| ANSI/NEMA AB 3:2013 | Molded-Case Circuit Breakers and Their Application |
| NEMA AB 4:2017 | Guidelines for Inspection and Preventive Maintenance of Molded-Case Circuit Breakers Used in Commercial and Industrial Applications |
| IEC 60947-2:2016 | Low-voltage switchgear and controlgear - Part 2: Circuit-breakers |
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