Bulletin 1492-MC
Circuit Breaker
Product Overview/Description
Bulletin 1492-MC Circuit Breakers
Table of Contents
Industrial Circuit Breakers for North American Applications
The Bulletin 1492-MC line includes:
AC DIN Rail
Mounting....................... 7-11
Specifications.............. 7-12
Product Selection...... 7-12
Approximate
0
1
ꢀ 1/2 in. wide circuit breakers
ꢀ 1 in. wide circuit breakers
ꢀ Ground Fault Circuit Interrupters (GFCIs)
ꢀ Ground Fault Equipment Protector (GFEPs)
Dimensions................... 7-13
Features
ꢀ Designed, manufactured and listed to UL 489 (CSA C22.2, No. 5)
ꢀ Thermal-magnetic protection
ꢀ All Ratings (10…100 A) are HACR rated
ꢀ 10 kAIC (10…100 A)
ꢀ Finger-safe design (front) (1/2 in. wide)
ꢀ DIN Rail mounting (120/240 & 240V AC)
ꢀ Three-position handle (ON, Tripped (Middle), OFF)
ꢀ (Line and load) wire connections
Certifications
UL Listed
CSA Certified
2
3
4
Standards Compliance for
Bul. 1492-MC
Standards Compliance for GFCI
(5 mA trip sensitivity)
Standards Compliance for GFEP
(30 mA trip sensitivity)
ꢀ UL 489
ꢀ UL 943
ꢀ UL 1053
ꢀ CSA C22.2 No. 5
ꢀ HACR (10...100 A)
ꢀ SWD (15 and 20 A) for Switching Duty for
ꢀ CSA C22.2 No. 144
ꢀ CSA C22.2 No. 144
5
flourescent lighting applications
Bulletin 1492-MC Thermal Magnetic Description
Thermal Magnetic Circuit Breakers
Bulletin 1492-MC Circuit Breakers for Branch Circuit protection are
available in one (1)-, two (2)-, and three (3)-pole construction in
120/240 volt rating, 240 volt rating and as one (1)-pole and two (2)-
pole devices in 480/277 volt rating. Versions are available as Ground
Fault Circuit Interrupters and as Ground Fault Equipment Protectors.
Circuit Frequency
6
Bul. 1492-MC circuit breakers may be applied to frequencies from
DC up to 60 Hz without derating. For applications above 60…400
Hz, contact Rockwell Automation with specific application
information for the derating of the circuit breakers.
7
Available Short Circuit Current
The 1492-MC product line consists of Thermal Magnetic Circuit
Breakers and Ground Fault Sensing Breakers that are designed,
manufactured, and certified to North American standards, UL 489,
UL 943, UL1093, and the equivalent CSA standards, CSA 22.2 No.
5.1, 22.2 No. 144.
Bul. 1492-MC Thermal Magnetic Circuit Breakers are general-
purpose devices suitable for the majority of industrial, inverse time
circuit breaker applications.
Bul. 1492-MC circuit breakers should only be applied in those
applications in which the available short-circuit (or fault) current is
less than or equal to the interrupting rating shown in the Voltage and
Interrupting Ratings table.
8
Table 1. Voltage and Interrupting Ratings
Interrupting Ratings (rms
Symmetrical Amperes)
They combine thermal and magnetic trip actions and provide
accurate overload and short-circuit protection for conductors and
connected equipment.
AC Voltage DC Voltage 1 AC Rating
DC Rating 1
Cat. No.
9
1492-MCAA1xx
1492-MCAA2xx
1492-MCAA2Hxx
1492-MCAA3xx
1492-MCBA1xx
1492-MCBA2xx
1492-MCBA2Hxx
1492-MCBA3xx
1492-MCEA1xx
1492-MCEA2xx
1492-MCGA1xx
1492-MCGA2xx
120/240
240
24, 48, 62.5
3,000
Circuit Breaker Application Information
Selection of a Bul. 1492-MC circuit breaker with appropriate circuit
protection includes consideration of:
24, 48, 62.5
3,000
ꢁ
10
11
12
13
10,000
ꢀ Circuit voltage
ꢀ Circuit frequency
ꢀ Available short circuit current
ꢀ Continuous current rating
ꢀ Application considerations
ꢀ Special operating conditions
120/240
240
ꢁ
ꢁ
ꢁ
120
120/240
120
10,000
ꢁ
ꢁ
The following discussion is based upon National Electric Code and
UL requirements. Similar considerations are appropriate for
Canadian applications.
120/240
1 Rating as supplementary protector.
ꢁ Consult your local Rockwell Automation sales office or Allen-Bradley
distributor for specific rating.
Circuit Voltage
Bul. 1492-MC circuit breakers are rated by voltage class.
Applications should not exceed the listed voltage range (see Table
1).
www.ab.com/catalogs
Preferred availability cat. nos. are bold.
7-6
Publication A117-CA001A-EN-P
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