Bulletin 1492
Circuit Protection
12
The Allen-Bradley Line of Circuit Protection Devices
Allen-Bradley offers 3 different lines of Circuit Breakers (Supplementary Protectors) and a line of branch circuit rated Fuse Holders.
Allen-Bradley Thermal Magnetic Circuit Breakers are ideal for protecting control circuitry components from damage due to
overcurrents and short circuits.
Circuit Breakers are UL Component Recognized and CSA Certified as Supplementary Protectors.
• UL File Number E65138, Guide Number QVNU2
• CSA File Number LR37712. Class 9091-01 (1492-CB)
• CSA File Numbers LR67768, LR16185. Class 9091-01 (1492-GH)
• VDE 0641 Certified as Miniature Circuit Breakers (1492-CB Only)
• Compliant with IEC 934 — Circuit Breakers for Equipment
• CE Marked
Potential applications include:
• Solenoids
• Relay/contactor coils
• Transformers
• PLCs
• Computers
• Medical equipment
• Power supplies
• PLC I/O points
Three types of rail-mounted circuit breakers are available:
• Energy Limiting style CB
• High-density style GH — single-pole
• High-density style GS — multi-pole
1492 Circuit Breaker (Supplementary Protectors) Selection Table
Type
Approvals
UL
CSA
Standards
IEC
CE Marked
Poles
Volts AC
Volts DC
Current Range
Optional Auxiliary Contacts
2
Trip Characteristics
1492-CB
1492-GH
1077
1077
1492-GS
1077
22.2-235
22.2-235
22.2-235
898
934
934
Yes
Yes
Yes
1, 2, 3
1
1, 2, 3
277/480
250
277/480
65
65
65
0.5…50 A
0.2…15 A
0.2…25 A
Yes
No
Yes
3…5 x In, 6…10 x In, 12…20 x In
6…12 x In
6…12 x In
Energy Limiting
Yes
No
No
Manual Operation
Yes
Yes
Yes
Poles/foot
17
24
24
Mounting
DIN Rail
DIN Rail, A-B Rail
DIN Rail, A-B Rail
Yes
Yes
Yes
IEC 529 and 947 Finger Protection
1492-FB Fuse Holders
1492-FB Class CC Fuse Holders provide a DIN Rail-mounted package for use in Class CC fuse applications such as transformers
and motors.
Features include:
• IEC 529 finger protection — dead front construction
• Compact size requiring less panel space than open-style fuse holders
• Optional blown fuse indicator
• Branch circuit protection
• UL listed
• DIN #3 Rail mounted
12-90
Bulletin 1492
Circuit Protection
Fuse Holders
1492-FB
Description
Features
Approvals
Bulletin 1492 Class CC Fuse Holders
provide a safe and convenient means for
the installation of Class CC fuses. The
1492-FB Fuse Holders are available in
1-, 2-, and 3-pole configurations and have
an optional neon blown fuse indication
light. The fuse holder is 30 A, rated at
600V and is UL listed. The FB Fuse Holder
utilizes a self-lifting box lug on the line and
load side of the block, each capable of
accepting a #6…#14 AWG copper wire.
• IEC 529 finger protection — dead front
construction.
• The patented handle design isolates
the fuse from line power when the
handle is opened for insertion or
removal.
• Compact size requiring less panel
space than open style fuse holders.
• Optional blown fuse indicators — allow
for easy troubleshooting of electrical
circuits.
• 30 A frame size — accepts 0…30 A
Class CC fuses from major fuse
manufacturers.
• 600V AC/DC.
• 200 kA withstand rating.
• Available in 1-, 2-, and 3-pole versions.
• Mounts on standard 35 mm DIN Rail
(Allen-Bradley Cat. No. 199-DR1).
• Easy installation and removal of fuses
(no special tools required).
• Accepts copper wire sizes
#6…#14 AWG.
• Rejection features — rejects midget
fuses and international 10 x 38 mm
fuses, which do not have interrupt
ratings as high as Class CC fuses.
•
•
•
•
Applications
•
•
•
•
•
Protection of equipment.
Control transformers.
Solenoids.
Lighting and heating loads.
Branch circuits in electrical distribution
systems.
• Excellent for small motor loads (up to
approximately 10 Hp).
• Excellent for group protection of small
motors (for example a grouping of 1 Hp
motors).
• Consult fuse manufacturers to select
the best fuse for the application.
UL 512 listed
CSA C22.2 certified
IEC 947-7-1
IEC 529 finger protection — dead front
construction
• CE marked
12-91
Bulletin 1492
Circuit Protection
Fuse Holders, Continued
1492-FB, Continued
2.13"
(54 mm)
0.69" (17.5 mm)
1-pole fuse block.
Approvals
UL
CSA
600V AC/DC
600V
AC/DC
600V AC/DC
30 A
30 A
30 A
#14…#6 AWG
#14…
#6 AWG
#14…#6 AWG
#14…
#6 AWG
Voltage Rating
Wire Range (Rated Cross Section)
Wire Strip Length
1492-FB3C30(-L)
3.07" (78 mm)
2.13"
(54 mm)
1.38" (35 mm)
Specifications
Maximum Current
2-pole fuse block.
2.13"
(54 mm)
2.07" (52.5 mm)
3-pole fuse block.
UL
CSA
UL
CSA
600V AC/DC
600V AC/DC
600V
AC/DC
30 A
30 A
30 A
#14…#6 AWG
#14…
#6 AWG
0.5" (12.7 mm)
0.5" (12.7 mm)
0.5" (12.7 mm)
Recommended Tightening Torque
15 lb-in. (1.7 Nm)
15 lb-in. (1.7 Nm)
15 lb-in. (1.7 Nm)
Working Voltage (Indicating Circuit)
95…600V AC, 110…600V DC
95…600V AC, 110…600V DC
95…600V AC, 110…600V DC
Leakage Current (Indicating Circuit)
0.8 mA max. @ 600V
0.8 mA max. @ 600V
0.8 mA max. @ 600V
Use Class CC fuse only ➊
Use Class CC fuse only ➊
Use Class CC fuse only ➊
–40…+221°F (–40…+105°C)
–40…+221°F (–40…+105°C)
–40…+221°F (–40…+105°C)
Fuse Type
Insulation Temperature Range
Fuse Holder
Without Blown Fuse Indicator
With Neon Blown Fuse Indicator
Accessories (page 12-172)
Mounting Rails
1 m Symmetrical DIN (Steel)
2
1492-FB2C30(-L)
3.07" (78 mm)
Note: Height dimension is measured
from top of rail to top of
terminal block.
3.07" (78 mm)
1492-FB1C30(-L)
Dimensions are not intended to
be used for manufacturing
purposes.
Cat. No.
Pcs./Pkg.
Cat. No.
Pcs./Pkg.
Cat. No.
1492-FB1C30
6
1492-FB2C30
3
1492-FB3C30
Pcs./Pkg.
2
1492-FB1C30-L
6
1492-FB2C30-L
3
1492-FB3C30-L
2
Cat. No.
Pcs./Pkg.
Cat. No.
Pcs./Pkg.
Cat. No.
Pcs./Pkg.
199-DR1
10
199-DR1
10
199-DR1
10
1 m Symmetrical DIN (Aluminum)
1492-DR5
10
1492-DR5
10
1492-DR5
10
1 m Hi-Rise Sym. DIN (Aluminum)
1492-DR6
2
1492-DR6
2
1492-DR6
2
1 m Angled Hi-Rise Sym. DIN (Steel)
1492-DR7
2
1492-DR7
2
1492-DR7
2
1492-EA35
50
1492-EA35
50
1492-EA35
50
1492-EAH35
10
1492-EAH35
10
1492-EAH35
10
End Anchors:
DIN Rail — Normal Duty
DIN Rail — Heavy Duty
➊ All major fuse brands and current ranges have been evaluated for use with this fuse holder. Due to the heat they generate, only the following
fuses must be derated.
Gould ATQR 1-1/4, I = 0.42 A max.
Gould ATQR 1-2/5, I = 0.47 A max.
12-92
Bulletin 1492
Circuit Protection
Circuit Breakers (Supplementary Protectors)
1492-CB
Trip Curves
1492-CB Trip Curves are available in
publication 1492-2.5.
The Benefits of Limiting
Let-Through-Energy
Bulletin 1492 Energy Limiting circuit
breakers are thermal magnetic type
supplementary overcurrent protective
devices. Bulletin 1492-CB circuit breakers
are available in 1-, 2-, and 3-pole units
rated from 0.5…50 A. AC units are rated
65V DC as standard. 2- and 3- pole
devices are connected internally and at
the handle for simultaneous operation.
Wire termination is achieved by a
clamping style, self-lifting box lug on all
Bulletin 1492-CB units. Both line and load
side termination points will accept
#16…6 AWG (1.5…16 mm2) copper
wires.
• A positively trip-free mechanism
(breaker operation cannot be defeated
by holding the handle in the ON
position)
• 3 trip curves: F, G, and H
• Time delay (H characteristic) for high
inrush currents during inductive
start-ups such as transformers and
power supplies
• Superior shock and vibration
resistance capabilities — helps to
prevent nuisance tripping
• Mounts on DIN Rail or optional through
door brackets
• On standard AC/DC versions (F, G, H)
line and load connections may be
reversed
Features
Short Circuit Interruption Diagrams
Short Circuit Interruption 10 kA — 120 Volts AC
Instant of initiation: 15° after voltage zero
VOLTAGE ACROSS BREAKER
CONVENTIONAL BREAKERS
ALLEN-BRADLEY 1492-CB
MAX ARC VOLTAGE
RECOVERY VOLTAGE
CURRENT
• Energy Limiting Design — protects
downstream components better than
conventional breakers during short
circuits
• Field-mountable options for selective
applications
• True IP2X Finger-Safe design (top and
sides)
• International approvals — CE Marked,
meets UL, CSA, and IEC (VDE)
standards for worldwide acceptance
• Ratings to 480V AC and 10,000 A
Interrupt Capacity (refer to
page 12-98)
• AC and DC voltage ratings — in one
convenient device
TIME
A B
C
A BC
A = Instant when the short is initiated
B = Instant when the contacts open and the arc is initiated
C = Instant when the arc extinguishes and the current ceases to flow
Let through I 2 t
Description
1492-CB vs. Conventional Breakers
The 1492-CB line features the unique
ability to achieve short circuit
interruptions far more effectively than
conventional breakers.
In conventional circuit breakers, short
circuit interruption time required is
approximately one or two half cycles of an
AC sine wave. When the contacts open,
the resulting arc continues to burn until
the current level passes through zero.
The arc may re-ignite because of the
insufficient width of the contact gap. The
current that flows until the arc is
extinguished produces a heating effect
proportional to the I2t value
(let-through-energy) of the fault current.
The 1492-CB Energy Limiting circuit
breaker is designed to substantially
reduce the amount of let-through-current
and the resulting let-through-energy that
can damage protected components. The
1492-CB has the ability to interrupt short
circuit current within the first half cycle of
the fault.
79,000 A2 s
3,500 A2s
12-93
Bulletin 1492
Circuit Protection
Circuit Breakers (Supplementary Protectors), Continued
2
1492-CB, Continued
Accessories
The Benefits of Limiting
Let-Through-Energy (Continued)
Accessory Notes
Limiting let-through-energy will protect
against the harmful effects of overcurrent
and is focused primarily on avoiding the
following:
• Excessive Heat
• Mechanical Damage
Both of these factors are proportional to
the square of the current. Thermal energy
is proportional to the square of the RMS
value and magnetic forces are
proportional to the square of the peak
value. The most effective way to provide
protection is to substantially limit
let-through-energy. This provides the
following advantages:
• Far less damage at the location of the
short circuit.
• Fast electric separation of a faulty unit
from the system, especially power
supplies connected in parallel that are
switched off when the voltage of the
power bus drops below a certain level.
• Far less wear on the circuit breaker
itself. This means more safe
interruptions.
• Better protection of all components in
the short circuit path.
• Far wider range of selective action
when used with an upstream protective
device. (No nuisance shut downs from
feeder line interruptions, causing a
blackout in all connected branches.)
Applications
Bulletin 1492-CB Energy Limiting circuit
breakers have a wide range of trip
characteristics for a wide range of
applications.
• F trip characteristic (3…5 x In) ➊ for
low fault tolerant loads, such as PLC
outputs, solid state control equipment,
and also for selective action with an
upstream fault device
• G trip characteristic (6…10 x In) ➊ for
standard duty loads, such as relay
coils, control circuitry, and test
equipment
• H trip characteristic (12…20 x In) ➊ for
high inrush loads, such as power
supplies, heaters, and transformer
primaries
A type F has a fault level inrush current
interruption approximately half that of type
G. The type H has a fault level interruption
approximately twice that of type G.
12-94
Relay Trip (Shunt-Trip)
Note: Maximum of two accessories per
device.
Auxiliary Contacts
Refer to Specifications on page 12-97 for
ratings. Each auxiliary contact module
contains one (1) contact, either Normally
Open or Normally Closed. Actuation of the
contact is determined by the handle
position of the adjacent poles.
Signal Contacts
Refer to the table below for ratings. The
Relay trip module can be used to trip the
adjacent current carrying poles from a
remote location by applying a voltage
(pick-up voltage) to the Relay trip
terminals. Contacts operate between 8
and 16 milliseconds after the pick-up
voltage has been applied.
Type
Pick-Up
Voltage Range
Impedance
A1
5…15 V AC/DC
1.1 Ω
A2
10…24V AC/DC
4.7 Ω
A3
20…48V AC/DC
16 Ω
A4
40…110V AC/DC
63 Ω
A5
90…240V AC/DC
395 Ω
Switched Neutral Module
(not field-mountable)
Refer to Specifications on page 12-97 for
ratings. Each contact module contains
one contact that will be linked internally
with the adjacent poles, but not through
the handle. Contacts are actuated by a
fault condition on the protected poles, not
by the manual operation of them.
Note: The difference between an
auxiliary contact and a signal contact is
the protected poles adjacent to the signal
contact may be manually shut off without
affecting the status of the signal contact,
whereas the auxiliary contact is activated
either by manual (possibly to service a
panel) or automatic operation (fault) of the
protected poles. Manual operation of the
protected poles does not alter the contact
state of the signal contact (which may be
connected to an alarm circuit for fault
indication only).
➊ In = rated current. The time/current trip
characteristic k1…k2 x In is defined such
that inrush current k1 x In has a time delay
that exceeds 10 ms, and k2 x In has a time
delay that is less than 10 ms.
Refer to Specifications on page 12-97 for
ratings. This module is used to open the
neutral line of the circuit as a result of the
condition of the protected poles. It is used
as a safety measure (required by some
standards) for the protection of networks
with a grounded neutral system. The
switched neutral pole opens after and
closes before the adjacent protected pole
(i.e., early make, late break). Automatic
actuation is a result of the adjacent pole
trip mechanism and manual actuation is
by the linked handles.
Bulletin 1492
Circuit Protection
Circuit Breakers (Supplementary Protectors), Continued
1492-CB, Continued
• Will the system require additional
shaping options (e.g., auxiliary
contacts, signal contacts)?
After defining these few parameters, the
selection can be done by following the
chart below. All options are
field-mountable except the neutral switch,
which comes installed from the factory.
How to Order 1492-CB
The following information must be known
to select the proper circuit breaker:
• What is the full load amperage that will
be available in the system?
• Is it a 1-, 2-, or 3-phase system?
• What are the start-up or inrush
properties of the load?
1492 – CB
3
G
200 – N
Selection Information
You can order a basic 1-, 2-, or 3-pole
circuit breaker from the following tables
and add an accessory module to meet
your specific application requirements.
➊➍
Bulletin
Number
Switched
Neutral Module
Energy Limiting
Circuit Breaker
CB
N➌
277V 65 A
Screw Terminal
Number of Poles
Rated Voltage ➋ By
Trip Characteristic
F, G, H
DF,
DG, DH
1
1 pole
277V AC
65V DC
120V DC
2
2 poles
480V AC
65V DC
240V DC
3
3 poles
480V AC
65V DC
360V DC
Trip Characteristic
Code
Magnetic Trip Range
F
3…5 x In
G
6…10 x In
H
12…20 x In
DF ➌➍
4.2…7 x In
DG ➌➍
8.5…14 x In
DH ➌➍
17…28 x In
In = Rated Current
Trip
Char.
➊
➋
➌
➍
Current Rating Code (Standard Trip Characteristic is Type G)
150 ➌ 160 ➌ 200 ➌ 250 ➌ 300 ➌ 320 ➌ 400 ➌ 500 ➌
F
005
010
015
020
030
040
050
060
070
100
120
G
005
010
015
020
030
040
050
060
070
100
120
150
160
200
250
300
320
400
500
H
005
010
015
020
030
040
050
060
070
100
120
150
160
200
250
300
320
400
500
DF ➌➍
005
010
015
020
030
040
050
060
070
100
120
150
160
200
250
300
320
400
—
DG ➌➍
005
010
015
020
030
040
050
060
070
100
120
150
160
200
250
300
320
400
—
DH ➌➍
—
—
—
—
—
—
—
060
070
100
120
150
160
200
250
300
320
400
—
Amp
Rating
0.5
1
1.5
2
3
4
5
6
7
10
12
15
16
20
25
30
32
40
50
This alphanumeric character is for the optional neutral module.
Rated volts are UL Recognized.
Minimum order of 10 breakers required.
Attention: Do not use these DC versions in AC networks. Polarity markings must be observed with the DC versions.
12-95
Bulletin 1492
Circuit Protection
Circuit Breakers (Supplementary Protectors), Continued
1492-CB, Continued
Accessories Used with All 1492-CB Circuit Breakers
Accessory (page 12-172)
Mounting Rails
1 m Symmetrical DIN
Cat. No.
Pcs./Pkg.
199-DR1
10
1 m Hi-Rise Symmetrical DIN
1492-DR6
2
1 m Angled Hi-Rise Symmetrical DIN
1492-DR7
2
1492-EAH35
50
End Anchor
1492-GM35
10
1492-SMN83
5
Cat. No.
Pcs./Pkg.
1492-ACBH1
1
1492-ACBH2
1
1492-ACBS1
1
1492-ACBS2
1
Relay Trip Module:
5…12V AC/DC
1492-ACBA1
1
10…24V AC/DC
1492-ACBA2
1
20…48V AC/DC
1492-ACBA3
1
40…110V AC/DC
1492-ACBA4
1
90…240V AC/DC
1492-ACBA5
1
Connecting Clip
1492-ACBCC1
8
Opening Seal ➌
1492-ACBHS1
10
Commoning Links
1 m — 1-Pole (56 devices/m) 30 A
1492-ACBCL1
1
1 m — 2-Pole (29 devices/m) 30 A
1492-ACBCL2
1
1 m — 3-Pole (19 devices/m) 40 A
1492-ACBCL3
1
1492-ACBEC1
10
Group Marking
Marking Systems
Field Mounted Accessories Used with 1492-CB Circuit Breakers
Accessory (page 12-172)
Auxiliary Contacts:
Normally Open ➊
Normally Closed ➋
Signal Contacts:
Normally Open ➊
Normally Closed ➋
Bus Bar End Cap for 2- or 3-Pole Devices
2
Front Panel Mounting Brackets:
1-Pole
1492-N711
5
2-Pole
1492-N712
5
3-Pole
1492-N713
5
4-Pole
1492-N714
5
5-Pole
1492-N715
5
➊ Normally Open — Contact assumes the same position as the protected poles. When breaker is off, contact is open.
➋ Normally Closed — Contact assumes the opposite position of the protected poles. When breaker is off, contact is closed.
➌ Used to close openings made on the side of breakers when installing and then removing auxiliaries.
12-96
Bulletin 1492
Circuit Protection
Circuit Breakers (Supplementary Protectors), Continued
1492-CB, Continued
Specifications ➊
Cat. No.
1492-CB1
1492-CB2
1492-CB3
1-Pole
2-Pole
3-Pole
Description
Approvals ➋
, CSA, VDE
, CSA, VDE
, CSA, VDE
480V AC, 65 Volts DC Max.
DC Version up to 120V per Pole.
A 3-Pole Breaker will operate to 360V DC.
Maximum Voltage Ratings
Dielectric Strength
1960V AC
Shock
25 G Half Sine Wave for 11 ms (Three Axes)
10…500 Hz for 1 Hour
Amplitude:
10…57 Hz; 0.030 inches peak to peak
57…500 Hz; 5G peak
Vibration
Operating Temperature Range
–4…+140°F (–20…+60°C)
Shipment and Short Term
Temperature Limits
–40…+185°F (–40…+85°C)
Housing Material
Melamine — Phenolic
#16…#6 AWG (1.5…16 mm2)
Wire Size
Recommended Wire
Strip Length
0.51" (13 mm)
Up to 6 A
7…16 A
20…32 A
40…50 A
Electromechanical Life
50,000 Cycles
30,000 Cycles
20,000 Cycles
12,000 Cycles
Auxiliary Contact Ratings
277V AC, 6 A
125V DC, 1 A
50V DC, 6 A
Signal Contact Ratings
277V AC, 6 A
125V DC, 1 A
50V DC, 6 A
Switched Neutral Rating
277V AC, 65 A
➊ Performance Data — See Page Important-2.
➋ Circuit breakers also meet the requirements of AS, BS and SEV.
Impedance Table
Amp Rating (A)
0.5
1
1.5
2
3
4
5
6
7
10
12
Impedance (Ω)
G Characteristic
15
16
20
25
30
32
40
50
4.4
1.27
0.67
0.37
0.14
0.08
0.06
0.04
0.04
0.02
0.01
0.008 0.008 0.005 0.005 0.003 0.003 0.003 0.002
Impedance (Ω)
H Characteristic
4.0
1.15
0.60
0.33
0.13
0.08
0.06
0.04
0.04
0.02
0.01
0.008 0.008 0.005 0.004 0.003 0.003 0.003 0.002
Approximate Dimensions
Dimensions shown in inches (millimeters). Dimensions are not intended to be used for manufacturing purposes.
Width
1.77
(45)
No. of Poles
1.77
(45)
CL of Rail
Width
(millimeters)
17.5
1
2
3
4
5
0.7
1.4
2.1
2.8
3.5
+0.05
–0
35
+1
–0
52.5
+1.5
–0
70
+2
–0
87.5
+2.5
–0
0.89
(22.6)
3.53
(89.7)
60˚
Width
(inches)
1.76 (44.7)
2.44 (62)
2.72 (69)
12-97
Bulletin 1492
Circuit Protection
Circuit Breakers (Supplementary Protectors), Continued
1492-CB, Continued
Approvals
• UL 1077
• CSA 22.2 NO. 235
• VDE 0641 (IEC 60898)
In North America, the Cat. No. 1492-CB circuit breaker is rated as a Supplementary Protector with a short-circuit current rating.
Internationally, it is rated by IEC as a Miniature Circuit Breaker with an interrupt rating
Electrical Characteristics
Voltage Rating
Short-Circuit Current Rating ➊
Interrupt Rating Icn (IEC only)
Poles
Tripping
Characteristics
1
F, G, H
0.5…50
125
—
10 kA, U2
1
F, G, H
0.5…50
277
—
3 kA, U2
2, 3
F, G, H
0.5…50
240
—
5 kA, U2
2, 3
F, G, H
0.5…50
480
—
3 kA, U2
1, 2
F, G, H
0.5…50
—
65
2 kA, U1
DF, DG
0.5…40
—
120
10 kA, U1
DH
6…40
—
120
5 kA, U1
DF, DG
0.5…40
—
240
10 kA, U1
DH
6…40
—
240
5 kA, U1
DF, DG
0.5…40
—
360
10 kA, U1
6…40
—
360
5 kA, U1
Rated Current (A)
AC
DC
UL 1077 Supplementary Protector Rating
1
2 wired in series
3 wired in series
DH
CSA 22.2 #235 Supplementary Protector Ratings
1
F, G, H
0.5…50
277
—
5 kA, U1
2
F, G, H
0.5…50
480
—
5 kA, U1
3
F, G, H
0.5…50
480
—
5 kA, U1
1
F, G, H
0.5…50
—
65
2 kA, U1
DF, DG
0.5…40
—
120
10 kA, U1
DH
6…40
—
120
5 kA, U1
DF, DG
0.5…40
—
240
10 kA, U1
DH
6…40
—
240
5 kA, U1
DF, DG
0.5…40
—
360
10 kA, U1
6…40
—
360
5 kA, U1
1
2 wired in series
3 wired in series
DH
2
VDE 0641 (IEC 60898) Miniature Circuit Breaker Ratings
1
F, G
0.5…25
240/420
—
10 kA
1
F, G
30…40
240/420
—
6 kA
1
H
0.5…40
240/420
—
6 kA
2
F, G
0.5…25
420
—
10 kA
2
F, G
30…40
420
—
6 kA
2
H
0.5…40
420
—
6 kA
3
F, G
0.5…25
420
—
10 kA
3
F, G
30…40
420
—
6 kA
3
H
0.5…40
420
—
6 kA
➊ The short-circuit current rating is followed by a letter and number designating the test conditions and any calibrations and dielectric tests following
the short-circuit test. These designations are defined as follows (see ➋ also):
C — Indicates that the short-circuit test was conducted with series overcurrent protection
U — Indicates that the short-circuit test was conducted without series overcurrent protection
1 — Indicates that a recalibration and dielectric test was not conducted as part of the short-circuit test
2 — Indicates that a recalibration and dielectric test was conducted as part of the short-circuit test
➋ These alphanumeric designations were established by UL. CSA has not yet adopted them; however, the test conditions are equivalent to UL
and the coding is appropriate.
12-98
Bulletin 1492
Circuit Protection
Circuit Breakers (Supplementary Protectors), Continued
1492-GH
High Density Circuit Breakers
1492-GH…
Description
2.89" (73.4 mm)
Bulletin 1492 High Density circuit breakers are thermal
magnetic type supplementary overcurrent protective
devices. Bulletin 1492-GH circuit breakers are available
in one pole units. The 1492-GH is rated at 250V AC,
and has a 65V DC rating as standard.
Wire termination is achieved by a clamping style,
self-lifting box lug.
3.15" (80.0 mm)
0.49"
(12.4 mm)
High-density 1-pole circuit breaker,
thermal magnetic, mounts on A-B rail
and DIN Rails.
Specifications
Approvals
/CSA/VDE
Maximum Voltage Rating
250V AC, 65V DC
Maximum Interrupting Capacity
(that allows continued use)
200 A
(not to exceed 100 times rated current)
#22…#10 AWG (0.5…6 mm2)
Wire Range (Rated Cross Section)
Wire Strip Length
0.44" (11.2 mm)
Recommended Screw Tightening Torque
10…12 lb-in. (1.13…1.4 Nm)
Insulation Temperature Range
–40…+221°F (–40…+105°C)
Cat. No.
Pcs./
Pkg.
0.2 A
1492-GH002
1
0.5 A
1492-GH005
1
0.8 A
1492-GH008
1
1.0 A
1492-GH010
1
1.2 A
1492-GH012
1
1.5 A
1492-GH015
1
2.0 A
1492-GH020
1
2.5 A
1492-GH025
1
3.0 A
1492-GH030
1
4.0 A
1492-GH040
1
5.0 A
1492-GH050
1
7.0 A
1492-GH070
1
10.0 A
1492-GH100
1
15.0 A
1492-GH150
1
Cat. No.
Pcs./
Pkg.
Terminal Blocks
Amperage Rating:
Accessories (page 12-172)
Mounting Rails:
1 m Symmetrical DIN
199-DR1
10
1 m Hi-Rise Symmetrical DIN
1492-DR6
2
1 m Angled Hi-Rise Sym. DIN
1492-DR7
2
3' Scored Channel
1492-N1
20
3' Rigid Channel
1492-N22
20
3' Hi-Rise Channel
1492-N44
2
1492-N25 ➊
2
1492-N23
10
1492-N47
50
Standoff Brackets
End Anchors:
A-B Rail — Heavy Duty
A-B Rail — Snap On
DIN Rails — Normal Duty
1492-EA35
50
DIN Rails — Heavy Duty
1492-EAH35
50
Marking Systems
Group Marker (DIN Rail only)
1492-SMN83
5
1492-GM35
10
Features
• High density design allows 24 one-pole breakers per
foot
• Wide range of currents for precise circuit
requirements
• International approvals — meets UL, CSA, and IEC
standards for worldwide acceptance
• CE Marked
• Ratings to 250V AC
• AC and DC voltage ratings — in one convenient
device
• A positively trip free mechanism (breaker operation
cannot be defeated by holding the handle in the ON
position)
• Superior shock and vibration resistance
capabilities — helps prevent nuisance tripping
• Universal mounting foot for a variety of mounting
channels
One Pole Style 1492-GH
Single-pole, high-density circuit breaker that
incorporates a thermal portion and a magnetic trip
function for the combined advantages of two sensing
systems. The 1492-GH style of breakers uses a pushto-set mechanism for circuit actuation and comes with
a manual trip button for manually opening the circuit.
Applications
Included but not limited to the protection of test
equipment, control instrumentation, solenoids and
power supplies. The wide range of current values and
the use of a thermal magnetic trip system allows for a
variety of applications where a very accurate and
compact breaker is required.
➊ Use every 12" with 1492-N22 rail.
12-99
Bulletin 1492
Circuit Protection
Circuit Breakers (Supplementary Protectors), Continued
1492-GH, Continued
UL, CSA, and IEC Rated
Selection Guide — To select a circuit
breaker use the following procedure:
• Determine the inrush correction factor
from Table 1.
• Determine the temperature correction
factor from Table 2.
• Determine the sealed current of the
load being protected.
• Multiply the sealed current by the two
correction factors and select the
closest higher ampere rating.
Example — What size circuit breaker
should be selected for a solenoid with
sealed current of 0.5 A, an inrush ratio of
1:8, and an ambient temperature of
+110°F (43.7°C)?
0.5 x 1.7 x 1.15 = 0.9775
Select the 1.0 A circuit breaker.
Table 1.
Inrush Ratio Correction Table
Inrush Ratio
1:1 to 1:4
1:5
1:6
1:7
1:8
1.3
1.4
1.5
1.6
1.7
Factor
Note: For resistive loads, use inrush correction factor of 1.0.
Table 2.
Ambient Temperature Correction Table
Ambient Temperature
70°F
(21.1°C)
100°F
(37.8°C)
120°F
(48.9°C)
140°F
(60°C)
160°F
(71.1°C)
180°F
(82.2°C)
200°F
(93.3°C)
1.0
1.1
1.2
1.3
1.4
1.5
1.6
Factor
Tripping time of the circuit breaker is determined from Table 3 below. Divide the circuit breaker value by the temperature correction
factor from Table 2 above to determine the actual rated current referenced in Table 3.
Table 3.
Tripping Time
Tripping Times in Seconds at 70°F (21.1°C)
Percent Rated Current
100%
200%
300%
400%
500%
600%
1000%
2000%
Greater
No
Trip
10…40
3…18
1.5…9
0.8…6
0.003…4
0.003…2
Maximum
0.02
Tripping Times (Seconds)
Note: When several breakers are rail mounted adjacent to each other, the no-trip current will be 80% of rated current at 70°F (21.1°C).
Trip Current
10000
8000
6000
4000
3000
2000
Trip current is 140% of rated current.
Protector will hold 100% of rated
current indefinitely.
Will trip within one hour at 140% of
rated current.
1000
800
600
400
300
200
100
80
60
40
30
20
0.05 to 7.5 amp
10
8
6
4
3
2
1
.800
.600
.400
.300
.200
8 to 15 amp
.100
.080
.060
.040
.030
.020
.010
.008
.006
.004
.003
.002
PERCENT RATED CURRENT
12-100
80
70
60
50
100
150
200
300
800
700
600
500
400
1000
1500
2000
3000
4000
6000
5000
8000
10000
.001
SECONDS
TRIPPING TIME AT 70 F
2
°
Bulletin 1492
Circuit Protection
Circuit Breakers (Supplementary Protectors), Continued
1492-GH, Continued
Specifications ➊
Cat. No.
1492-GH Series B
Description
1-pole with universal mounting foot for Allen-Bradley and DIN Rail mounting
250V AC 50/60 Hz
65V DC
Maximum Voltage Ratings
Standard Current Ratings
Internal Resistance per Pole
A
Ω
0.2
44
0.5
6.6
0.8
2.55
1.0
1.97
1.2
1.22
1.5
0.86
2.0
0.49
Dielectric Strength
2.5
3.0
4.0
5.0
7.0
10.0 15.0
0.313 0.205 0.104 0.082 0.034 <0.20 <0.20
1500V AC
Shock: 25 G, 11 ms duration
Vibration: 5 G (10…500 Hz)
Shock and Vibration Specifications
Insulation Resistance
100 MΩ @ 500V DC
6000 cycles @ rated current (UL 1077)
4000 cycles @ 200% rated current
Operating Life
Temperature Range
–40…+149°F (–40…+65°C)
Housing Material
Glass-filled Polyamide 6.6
#22…#10 AWG (0.5…6 mm2)
Wire Size
Recommended Wire
Strip Length
0.44" (11.2 mm)
Terminals
Tubular screw with self-lifting box lug
Recommended Tightening Torque
10…12 lb-in. (1.13…1.4 Nm)
➊ Performance Data — See Page Important-2.
Approvals
• UL 1077
• CSA 22.2 NO. 235
• VDE 0631 (IEC 60934)
In North America, the Cat. No. 1492-GH circuit breaker is rated as a Supplementary Protector with a short-circuit current rating.
Internationally, it is rated by IEC as a Circuit Breaker for Equipment with an interrupt rating.
Electrical Characteristics
Voltage Rating
Short-Circuit Current Rating ➊
Interrupt Rating Icn (IEC only)
Poles
Rated Current (A)
1
0.2…15
250
—
1 kA, U1
1
0.2…15
—
80
1 kA, U1
1
9…14
250
—
2 kA, C1
AC
DC
UL 1077/CSA 22.2 #235 Supplementary Protector Rating
VDE 0631 (IEC 60934) Circuit Breaker for Equipment Ratings
1
0.2…15
250
65
0.2 kA, but not to exceed 100 x In
➊ The short-circuit current rating is followed by a letter and number designating the test conditions and any calibrations and dielectric tests following
the short-circuit test. These designations are defined as follows (see ➋ also):
C — Indicates that the short-circuit test was conducted with series overcurrent protection
U — Indicates that the short-circuit test was conducted without series overcurrent protection
1 — Indicates that a recalibration and dielectric test was not conducted as part of the short-circuit test
2 — Indicates that a recalibration and dielectric test was conducted as part of the short-circuit test
➋ These alphanumeric designations were established by UL. CSA has not yet adopted them; however, the test conditions are equivalent to UL
and the coding is appropriate.
12-101
Bulletin 1492
Circuit Protection
Circuit Breakers (Supplementary Protectors), Continued
1492-GS
High-Density Circuit Breakers
Description
Features
Bulletin 1492 High Density circuit
breakers are thermal magnetic type
supplementary overcurrent protective
devices. Bulletin 1492-GS circuit
breakers are available in 1-, 2-, and 3-pole
devices, and all are available with an
internally mounted auxiliary contact. The
1492-GS is rated 0.2…25 A at 277V/480V
AC. The 1492-GS also has a DC voltage
rating of 65V DC.
• High Density Design — allows 24
1-pole breakers per foot.
• Optional Auxiliary Contacts are built-in,
no additional modules to attach.
Auxiliary Contacts do not increase size
of the device.
• Universal mounting foot for DIN Rails
and A-B Rails.
• International approvals — meets UL,
CSA, and IEC standards for worldwide
acceptance
• Toggle style handle for ease of
operation.
• Ratings to 480V/277V AC for 2- and
3-pole devices, and 277V AC for
single-pole devices.
• A positively trip-free mechanism
(breaker operation cannot be defeated
by holding the handle in the ON
position)
Approvals
•
•
•
•
UL 1077
CSA 22.2 NO. 235
IEC 934
CE Marked
VAC, 73F/23C
10 000
2
x In
1
1.05
1.4
6.0
12.0
1000
5 lb-in
(0.6 Nm)
3.15 in
(80 mm)
0
1
.49 in
(12.5 mm)
.98 in
(25 mm)
100
Si
2
3.28 in
(83.5 mm)
.51 in
(13 mm)
#18-10 AWG
(0.75-6 mm2)
8-25A
0.1-7.5A
10
t (S)
#18-16 AWG
(0.75-1.5 mm2)
.41 in
(10.5 mm)
3.48 in
(88.5 mm)
Aux. Si
Main 1
t
∞
> 1 hr
< 1 hr
> 0.1s
< 0.1s
1
0,1
0,01
1.47 in
(37.5 mm)
0,001
12-102
1
2 3 4 6 810
20 30 50 70 100
x ln (rated current)
Bulletin 1492
Circuit Protection
Circuit Breakers (Supplementary Protectors), Continued
1492-GS, Continued
• Will the system require additional
shaping options: auxiliary contacts,
signal contacts, etc.?
After defining these few parameters, the
selection can be done by following the
chart below.
How to Order
The following information must be known
to select the proper circuit breaker:
• What is the full load amperage that will
be available in the system?
• Is it a 1-, 2-, or 3-phase system?
• What are the startup or inrush
properties of the load?
1492 – GS
2
G
Selection Information
You can order a basic 1-, 2-, or 3-pole
circuit breaker from the following tables
and add an auxiliary contact to meet your
specific application requirements.
008 – H1
Bulletin
Number
Optional Auxiliary Contacts
Circuit Breaker
GS
Screw Terminal
Number of Poles
H1
Normally Open ➊
H2
Normally Closed ➋
Note: 1 contact max. for 1-pole circuit
breaker. 2 contacts max. for
2- and 3-pole circuit breakers.
Rated Voltage By Trip
Characteristic
G
1
One Pole
277V AC
65V DC
2
Two Pole
277/480V AC
65V DC
3
Three Pole
277/480V AC
65V DC
Trip Characteristic
Code
Magnetic Trip Range
G
6…10 x In
In = Rated Current
Current Rating Code (Standard Trip Characteristic is Type G)
Code
002
005
008
010
015
020
025
030
040
050
060
070
080
100
120
150
160
200
250
Amp Rating
0.2
0.5
0.8
1
1.5
2
2.5
3
4
5
6
7
8
10
12
15
16
20
25
Accessories Used with All 1492-GS Circuit Breakers
Accessory (page 12-172)
Mounting Rails:
1 m Symmetrical DIN
Cat. No.
Pcs./Pkg.
199-DR1
10
1 m Hi-Rise Symmetrical DIN
1492-DR6
2
1 m Angled Hi-Rise Symmetrical DIN
1492-DR7
2
3' Scored A-B Rail
1492-N1
10
3' Rigid A-B Rail
1492-N22
2
3' High Rise A-B Rail
1492-N44
2
End Anchor:
DIN Rail
A-B Rail (Heavy Duty)
Group Marking (DIN Rail)
Marking Systems
1492-EAH35
50
1492-N23
10
1492-GM35
10
1492-SMN83
5
➊ Normally Open — Contact assumes the same position as the protected poles. When breaker is off, contact is open.
➋ Normally Closed — Contact assumes the opposite position of the protected poles. When breaker is off, contact is closed.
12-103
Bulletin 1492
Circuit Protection
Circuit Breakers (Supplementary Protectors), Continued
1492-GS, Continued
Specifications ➊
Cat. No.
1492-GS
Description
High-density circuit breaker (supplementary protector) with universal mounting foot for Allen-Bradley and DIN rail mounting
277/480V AC 50/60 Hz
65V DC
Maximum Voltage Ratings
Standard Current Ratings
Internal Resistance per Pole
A
Ω
0.2 0.5 0.8
26 4.2 1.6
Dielectric Strength
Shock and Vibration
Specifications
Insulation Resistance
Current Capacity of Auxiliary
Contacts (N.O., N.C.)
Voltage Rating of Auxiliary
Contacts
Operating Life
Temperature Range
Wire Size
Recommended Wire
Strip Length
Recommended Tightening
Torque
➊ Performance Data — See page Important-2.
2
12-104
1.0
1.1
1.5
0.47
2.0
0.25
2.5
0.20
3.0
0.13
4.0
0.08
5.0
0.06
6.0
0.05
8.0 10.0 12.0 15.0 16.0 20.0 25.0
0.01 0.01 0.01 0.01 0.01 0.005 0.004
1960V AC
Shock: 25 G, 11 ms duration
Vibration: 5 G (10…500 Hz)
Greater than 100 MΩ @ 500V DC
1.0 A AC or DC (resistive load)
277V AC
65V DC
6000 cycles @ rated current (UL 1077)
–40…+149°F (–40…+65°C)
#22…#10 AWG (0.5…6 mm 2)
0.51" (13.0 mm) for Mail Terminals
0.41" (10.4 mm) for Auxiliary Terminals
5 lb-in. (0.565 Nm)
Bulletin 1492
Circuit Protection
Circuit Breakers (Supplementary Protectors), Continued
1492-GS, Continued
Approvals
• UL 1077
• CSA 22.2 NO. 235
• VDE 0631 (IEC 60934)
In North America, the Cat. No. 1492-GS circuit breaker is rated as a Supplementary Protector with a short-circuit current rating.
Internationally, it is rated by IEC as a Circuit Breaker for Equipment with an interrupt rating
Electrical Characteristics
Voltage Rating
Short-Circuit Current Rating ➊
Interrupt Rating Icn (IEC only)
Poles
Rated Current (A)
1
0.2…5
277
—
0.4 kA, U2
1
6…25
277
—
0.7 kA, U2
2, 3
0.2…5
277/480
—
0.4 kA, U2
2, 3
6…25
277/480
—
0.5 kA, U2
1, 2, 3
0.2…5
—
65
0.4 kA, U2
0.8 kA, U2
AC
DC
UL 1077 Supplementary Protector Rating
1, 2, 3
6…25
—
65
1
0.2…16
277
—
5 kA, C1
1
18…25
277
—
2 kA, C1
2, 3
0.2…16
277/480
—
5 kA, C1
2, 3
18…25
277/480
—
2 kA, C1
1
0.2…25
—
65
2 kA, C1
CSA 22.2 #235 Supplementary Protector Ratings
1
0.2…16
277
—
5 kA, C1
1
18…25
277
—
2 kA, C1
2, 3
0.2…16
277/480
—
5 kA, C1
2, 3
18…25
277/480
—
2 kA, C1
1
0.2…25
—
65
2 kA, C1
IEC 60934 Circuit Breaker for Equipment Ratings
1
0.2…5
250
—
0.4 kA
1
6…25
250
—
0.8 kA
2, 3
0.2…5
240/415
—
0.4 kA
2, 3
6…25
240/415
—
0.8 kA
1
0.2…5
—
65
0.4 kA
1
6…25
—
65
0.8 kA
➊ The short-circuit current rating is followed by a letter and number designating the test conditions and any calibrations and dielectric tests following
the short-circuit test. These designations are defined as follows (see ➋ also):
C — Indicates that the short-circuit test was conducted with series overcurrent protection
U — Indicates that the short-circuit test was conducted without series overcurrent protection
1 — Indicates that a recalibration and dielectric test was not conducted as part of the short-circuit test
2 — Indicates that a recalibration and dielectric test was conducted as part of the short-circuit test
➋ These alphanumeric designations were established by UL. CSA has not yet adopted them; however, the test conditions are equivalent to UL
and the coding is appropriate.
12-105