Cutler Hammer, Div of Eaton Corp A25, B25 Catalog Page
Definite Purpose Contactors and Starters
25–60A, Single- and Three-Phase—A25, B25
Incomplete catalog number
A25CNC30 A
Magnet coil suffix
Starters
4.3
25–60A, Single- and Three-Phase—A25, B25
Product Description
A25 and B25 Definite
Purpose Starters from Eaton’s
Electrical Sector combine the
features and flexibility of the
C25 Definite Purpose
Contactors and Freedom
Series Bi-metallic Ambient
Compensated Overload
Relays mounted on a common
mounting plate.
Features and Benefits
Overload Relay
●
Selectable manual or
automatic reset operation
●
Interchangeable heater
packs adjustable ±24% to
match motor FLA and
calibrated for use with 1.0
and 1.15 service factor
motors
●
Class 10 or 20 heater packs
●
Bimetallic, ambient
compensated operated.
Trip free mechanism
●
Electrically isolated NO-NC
contacts (pull RESET
button to test)
●
Overload trip indication
●
Shrouded or fingerproof
terminals to reduce
possibility of electrical
shock
●
Single-phase sensitivity
Contents
Description Page
25–60A, Single- and Three-Phase—A25, B25
Product Selection . . . . . . . . . . . . . . . . . . . . . . . V5-T4-24
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . V5-T4-26
Technical Data and Specifications . . . . . . . . . . V5-T4-27
Trip Curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . V5-T4-28
Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . V5-T4-28
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . V5-T4-29
15–45A, Single- and Three-Phase—A27, B27 . . . . V5-T4-30
15–75A, Single- and Three-Phase—A30, B30 and
C440/XT Electronic Overload Relay . . . . . . . . . . V5-T4-38
Standards and Certifications
●
UL Recognized
Components UL File
#E-1491, Guide NLDX2
●
CSA Certified Components
File #LR353, Guide
380W-1.14 Class 3211 04
Catalog Number Selection
25–60A, Single- and Three-Phase—A25, B25
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When Ordering Specify
●
Catalog number plus magnet coil suffix, see Page V5-T4-24
Example, order catalog number A25CNC30A
●
Heater packs for specific FLA of motor,
see Pages V5-T4-26 and V5-T4-27
Volume 5—Motor Control and Protection CA08100006E—August 2018 V5-T4-23
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4.3
A25 Starter
Product Selection
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Definite Purpose Contactors and Starters
Starters
Single- and Three-Phase Starters—Open Type
Single-Phase
Ampere Rating
Inductive
Full Load
25 115 150 2 — 1.5 — B25CNC25_ B25SNC25_ A25CNC25_ A25SNC25_
30 115 180 2 — 1.5 — B25CNC30_ B25SNC30_ A25CNC30_ A25SNC30_
40 115 240 3 — 2.2 — B25CNE40_ B25SNE40_ A25CNE40_ A25SNE40_
50 115 300 — — — — N/A N/A A25CNE50_ A25SNE50_
60 115 360 — — — — N/A N/A A25CNE60_ A25SNE60_
Line
Voltage
230 150 3 7-1/2 2.2 5.5 B25CNC25_ B25SNC25_ A25CNC25_ A25SNC25_
460 125 — 10 — 7.5 B25CNC25_ B25SNC25_ A25CNC25_ A25SNC25_
575 100 — 10 — 7.5 B25CNC25_ B25SNC25_ A25CNC25_ A25SNC25_
230 180 5 10 3.7 7.5 B25CNC30_ B25SNC30_ A25CNC30_ A25SNC30_
460 150 — 15 — 11 B25CNC30_ B25SNC30_ A25CNC30_ A25SNC30_
575 120 — 15 — 11 B25CNC30_ B25SNC30_ A25CNC30_ A25SNC30_
230 240 7-1/2 10 5.5 7.5 B25CNE40_ B25SNE40_ A25CNE40_ A25SNE40_
460 200 — 20 — 15 B25CNE40_ B25SNE40_ A25CNE40_ A25SNE40_
575 160 — 20 — 15 B25CNE40_ B25SNE40_ A25CNE40_ A25SNE40_
230 300 — 15 — 11 N/A N/A A25CNE50_ A25SNE50_
460 250 — 30 — 22 N/A N/A A25CNE50_ A25SNE50_
575 200 — 30 — 22 N/A N/A A25CNE50_ A25SNE50_
230 360 — 20 — 15 N/A N/A A25CNE60_ A25SNE60_
460 300 — 40 — 30 N/A N/A A25CNE60_ A25SNE60_
575 240 — 40 — 30 N/A N/A A25CNE60_ A25SNE60_
Locked
Rotor
Maximum Motor
(hp)
SinglePhase
ThreePhase
Maximum Motor
(kW)
SinglePhase
ThreePhase
Common
Control
Catalog
Number
12
Separate
Control
Catalog
3
Number
3
Three-Phase
Common
Control
Catalog
Number
1
Separate
Control
Catalog
3
Number
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Magnet Coil Suffix
Voltage
60 Hertz 50 Hertz Coil Suffix
4
AC
12 12 R 12 1R
24 24 T 24 1T
5
110–120
208–240 208–240 B 120 1A
6
240
277 — H
— 380–415 L
440–480 440–480 C
550–600 550–600 D
Notes
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Starters do not include heater packs. Select heater pack from tables, see Pages V5-T4-26 and V5-T4-27.
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Set of three heater packs required for single-phase applications.
3
Incomplete catalog number. Replace underscore (_) with magnet coil suffix from table above.
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Class H AC coils available as option for 15A–50A contactor. Add 2 before AC coil suffix letter.
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104–120V 50/60 Hz for 60A contactor.
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Available through 50A.
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Starters with DC coils include an early breaking auxiliary contact, C320KGD1. See Page V5-T4-62 for more detail.
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110–120
220 J
A 48 1W
Voltage
60 Hertz Coil Suffix
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DC
V5-T4-24 Volume 5—Motor Control and Protection CA08100006E—August 2018
Definite Purpose Contactors and Starters
AD
CB
1. 0
Service
Factor
1. 15
Service
Factor
Starters
4.3
Overload Relay
General
Overload relays are provided
to protect motors, motor
control apparatus and motorbranch circuit conductors
against excessive heating
due to motor overloads and
failure to start. This definition
does not include: 1) motor
circuits over 600 volts, 2)
short-circuits, 3) ground faults
and 4) fire pump control.
(NEC Art. 430-31)
Time Current
Characteristics
The time-current
characteristics of an overload
relay is an expression of
performance which defines
its operating time at various
multiples of its current
setting. Tests are run at
Underwriters Laboratory (UL)
in accordance with NEMA
Standards and the NEC.
UL requires—
●
When tested at 100
percent of its current
rating, the overload relay
shall trip ultimately
●
When tested at 200
percent of its current
rating, the overload relay
shall trip in not more than 8
minutes
●
When tested at 600
percent of its current
rating, the overload relay
shall trip in not more than
10 or 20 seconds,
depending on the Class of
the relay or heater packs
“Current Rating” is defined
as the minimum current at
which the relay will trip. Per
NEC, an overload must
ultimately trip at 125% of FLA
(Full Load Amperes) current
(heater) setting for a 1.15
service factor motor and
115% FLA for a 1.0 service
factor motor.“Current
Setting” is defined as the
FLA of the motor and thus
the overload heater pack
setting.
Example: 600% of current
rating is defined as 750%
(600 x 1.25) of FLA current
(heater) setting for a 1.15
service factor motor. A 10
ampere heater setting must
trip in 20 seconds or less at
75 amperes motor current for
a Class 20 relay.
Overload Relay Setting
FLA Dial Adjustment—
For motors having a 1.15
service factor, rotate the FLA
adjustment dial to correspond
to the motor’s FLA rating.
Estimate the dial position
when the motor FLA falls
between two letter values as
shown in the example.
For motors having a 1.0
service factor, rotate the FLA
dial single-half position
counterclockwise (CCW).
Manual/Automatic Reset—
The overload relay is factory
set at M for manual reset
operation. For automatic
reset operation, turn the reset
adjustment dial to the A
position as shown in the
illustration.
Automatic reset is not
intended for two-wire control
devices.
Test for Trip Indication—
To test overload relay for trip
indication when in manual
reset, pull out the blue RESET
button. An orange flag will
appear indicating that the
device has tripped. Push
RESET button in to reset.
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FLA Dial Adjustment Reset Adjustment Dial
A
M
Example of 12.0 FLA
setting for heater pack
number H2011B showing
position for 1.0 or 1.15
service factor motors.
Replacement Overload with Connectors
Starter Size Overload Part Number
25 and 30A 10-7125
40 and 50A 10-7132
60A 10-7131
Example of setting for manual
reset.
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Volume 5—Motor Control and Protection CA08100006E—August 2018 V5-T4-25
Definite Purpose Contactors and Starters
Locking Cover
4.3
Accessories
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Contactor Accessories, see Pages V5-T4-11 and V5-T4-12.
Locking Cover for Overload Relay
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Snap-on transparent or opaque plastic panel for covering access port to the overload relay trip
setting dial—helps prevent accidental or unauthorized changes to trip and reset setting.
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Separate Enclosures
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Starters
Locking Cover for Overload Relay
Minimum Order
Description
Clear cover, no accessibility 50 C320PC3
Gray cover, no accessibility, with auto only nib 50 C320PC4
Gray cover, no accessibility, with manual only nib 50 C320PC5
Gray cover with FLA dial accessibility, A, B, C, D positions
and auto only nib
Gray cover with FLA dial accessibility, A, B, C, D positions
and manual only nib
Separate Enclosures—NEMA 1
Application Catalog Number
25 and 30A C799B11
40, 50 and 60A C799B13
Quantity
(Std. Pkg.) Catalog Number
50 C320PC6
50 C320PC7
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Heater Packs
Fast Trip—Class 10 Heater Packs
Manual or Automatic Reset
Heater packs are shipped three to a carton.
Catalog numbers listed below are for three heater packs.
Fast Trip Ratings
Motor Full Load Ampere Rating
Dial Position
ABCD
0.26 0.313 0.367 0.42 H2101B-3
0.384 0.464 0.543 0.623 H2102B-3
0.57 0.688 0.806 0.924 H2103B-3
0.846 1.02 1.2 1.37 H2104B-3
1.28 1.55 1.83 2.1 H2105B-3
1.92 2.33 2.74 3.15 H2106B-3
2.3 2.79 3.28 3.77 H2107B-3
3.38 4.1 4.82 5.54 H2108B-3
4.96 6.03 7.09 8.16 H2109B-3
7.07 8.58 10.1 11.6 H2110B-3
9.6 11.2 12.8 14.4 H2111B-3
14.4 17.5 20.7 23.8 H2112B-3
18.7 21.8 25 28.1 H2113B-3
23.5 27.3 31 34.8 H2114B-3
28.3 32.6 37 41.3 H2115B-3
36.6 42.3 48.1 53.8 H2116B-3
53.8 60.8 67.9 74.9 H2117B-3
Trip Curves, see Page V 5-T4-28.
Notes
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For motor full load amperes between listed values, adjust dial clockwise for higher or counterclockwise for lower motor currents. The currents listed are for 1.5 service factor motors.
A position adjustment is provided for 1.0 service factor motors.
2
Set of three heater packs are required for both single- and three-phase applications.
1
Catalog Number
(Includes Three Heater
Packs)
2
V5-T4-26 Volume 5—Motor Control and Protection CA08100006E—August 2018
Definite Purpose Contactors and Starters
Starters
4.3
Standard Trip—Class 20 Heater Packs
Manual or Automatic Reset
Heater packs are shipped three to a carton.
Catalog numbers listed below are for three heater packs.
Standard Trip Ratings
Motor Full Load Ampere Rating
Dial Position
ABCD
0.254 0.306 0.359 0.411 H2001B-3
0.375 0.452 0.53 0.607 H2002B-3
0.56 0.676 0.791 0.907 H2003B-3
0.814 0.983 1.15 1.32 H2004B-3
1.2 1.45 1.71 1.96 H2005B-3
1.79 2.16 2.53 2.9 H2006B-3
2.15 2.6 3.04 3.49 H2007B-3
3.23 3.9 4.56 5.23 H2008B-3
4.55 5.5 6.45 7.4 H2009B-3
6.75 8.17 9.58 11 H2010B-3
9.14 10.8 12.4 14 H2011B-3
14 16.9 19.9 22.8 H2012B-3
18.7 22.7 26.7 30.7 H2013B-3
23.5 28.5 33.5 38.5 H2014B-3
29 34 39.1 44.1 H2015B-3
39.6 45.5 51.5 57.4 H2016B-3
53.9 60.9 67.9 74.9 H2017B-3
Trip Curves, see Page V5-T4-28.
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Catalog Number
(Includes Three Heater
Packs)
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Technical Data and Specifications
Terminal Wire Sizes
Line Side (Contactor)
Terminal Type Power Terminals Coil Terminals
Screw/pressure plate 8–14 AWG 12–16 AWG
Box lug: 25–50A 4–14 AWG 12–16 AWG
Box lug: 60A 3–14 AWG 12–16 AWG
Power Terminals—Load—Cu Only (Stranded or Solid)
Terminal Range Torque Rating
25 and 30A 14–6 AWG 20 lb-in (14–10 AWG)
40, 50 and 60A 14–2 AWG 35 lb-in (14–10 AWG)
Control Terminals—Cu Only
12–16 AWG stranded, 12–14 AWG solid
Notes
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For motor full load amperes between listed values, adjust dial clockwise for higher or counterclockwise for lower motor currents. The currents listed are for 1.5 service factor motors.
A position adjustment is provided for 1.0 service factor motors.
2
Set of three heater packs are required for both single- and three-phase applications.
3
Line side (contactor) torque ratings can be found on Page V5-T4-14.
3
Wire Range—Solid or Stranded
40 lb-in (8 AWG)
45 lb-in (6–4 AWG)
50 lb-in (3–2 AWG)
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Volume 5—Motor Control and Protection CA08100006E—August 2018 V5-T4-27
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Definite Purpose Contactors and Starters
0
1
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10
20
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40
50
100
200
300
400
500
1000
2000
3000
4000
5000
10,000
246810
From
Hot Start
From
Cold Start
Multiples of Current Setting
Trip Time
(Seconds)
0
1
2
3
4
5
10
20
30
40
50
100
200
300
400
500
1000
2000
3000
4000
5000
10,000
246810
From
Hot Start
From
Cold Start
Multiples of Current Setting
Trip Time
(Seconds)
1NO Aux. Contact
(When Supplied)
Reset
Wire “D”
(Supplied with
1NO Aux. Contact)
Wire “C”
(Supplied with Common Control)
1
13
14
L1 L2
T1
4/T22/T1
T2
AC Motor
98
97
96
95
4.3
Overload Relay UL/CSA Contact Ratings Control Circuit
4
AC Volts 120V 240V 480V 600V
NC Contact B600
4
Make and break 30A 15A 7.5A 6A
Break 3A 1.5A 0.75A 0.6A
4
Continuous 5A 5A 5A 5A
4
NO Contact C600
Make and break 15A 7.5A 3.375A 3A
4
Break 1.5A 0.75A 0.375A 0.3A
Continuous 2.5A 2.5A 2.5A 2.5A
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Trip Curves
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Bimetallic Ambient Compensated Overload Relay—25°C Open Rating
Class 10 Overload Relay Class 20 Overload Relay
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Starters
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Wiring Diagrams
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Single-Phase Connections Three-Phase Connections
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V5-T4-28 Volume 5—Motor Control and Protection CA08100006E—August 2018
T2
6/T32/T1 4/T2
T3
Wire “C”
1NO Aux. Contact
13
14
98
97
96
95
(When Supplied)
Wire “D”
(Supplied with
1NO Aux. Contact)
(Supplied with Common Control)
L1 L2 L3
1
T1
AC Motor
Definite Purpose Contactors and Starters
G D
C
Mtg. for #10-32 Screw
AHH
B
E
Starters
4.3
Dimensions
Approximate Dimensions in Inches (mm)
A25 and B25 Starers—Open Type
25 and 30 Ampere
Dimensions and Shipping Weights
Ampere Size
25 and 30 2.50 (64.0) 7.14 (181.0) 3.56 (90.4) 3.69 (93.7) 6.55 (166.0) 0.20 (5.1) 0.54 (13.7) 1.8 (0.8)
40 2.56 (65.0) 8.08 (205.0) 3.50 (89.0) 3.66 (93.0) 7.50 (190.5) 2.00 (51.0) 0.54 (13.7) 1.8 (0.8)
50 and 60 2.56 (65.0) 8.08 (205.0) 4.15 (105.0) 3.66 (93.0) 7.50 (190.5) 2.00 (51.0) 0.54 (13.7) 3.6 (1.6)
Wide
A
High
B
40, 50 and 60 Ampere
B
E
Mtg. for #10-32 Screw
Deep
C
G D
Deep
D
CAHH
MountingEMounting
G
Auxiliary
Contact Adder
H
Shipping
Weight
Lbs (kg)
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Volume 5—Motor Control and Protection CA08100006E—August 2018 V5-T4-29
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