Time Current Curves TD012033EN
Effective April 2014
Series C J-Frame
70-250 amperes, 240-600 volts
Contents
DescriptionPage
Catalog Number Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
JT Thermal/Magnetic Trip Unit
JDB, JD, HJD 2, 3 and 4 Poles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SC-4247-87D . . . . . . . . 4
JDC 2, 3 and 4 Poles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SC-4248-87C . . . . . . . . 5
Let-Through Curves
JDC, FDC, KDC, and LDC---240V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AD-29-166A . . . . . . . . . 6
JDC, FDC, KDC, and LDC---480V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AD-29-166B . . . . . . . . 7
JDC, FDC, KDC, and LDC---600V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AD-29-166C . . . . . . . . . 8
Eaton Leakage Module Curves
UL Earth Leakage Curve ELFD, JD, and KD, three- and four-pole, 110-480V . . . . . . . . . . . . TC01212005E . . . . . . . . 9
IEC Earth Leakage Curve ELFD, JD, and KD, three- and four-pole, 110-480V . . . . . . . . . . . TC01212006E . . . . . . . 10
Note:
Time/Current characteristic curves for Series C J-frame circuit breakers--voltages shown in curve headings
are maximum at which the breaker may be applied. Interrupting capacity of inidvidual breaker is tabulated
on each curve.
Note:
The following curves are UL489 Listed for use in North America.
The following circuit breakers are derived from Eaton, Westinghouse, or Cutler-Hammer history.
Time Current Curves are engineering reference documents for application and coordination purposes only.
For field testing molded case circuit breakers, refer to NEMA AB 4 guidelines.
Time Current Curves TD012033EN
Series C
J-Frame
Effective April 2014
Notee: Unless noted below, all curves remain unchanged from their prior revision .
Revision
2
Curve Number
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Page
Date
Time Current Curves TD012033EN
Series C
J-Frame
Effective April 2014
Catalog Number Selection
This information is presented only as an aid to understanding catalog numbers.
It is not to be used to build catalog numbers for circuit breakers or trip units.
Table 1. Trip Unit
JT 3 250 T
Trip Unit Type
JT = Thermal-magnetic
Number of Poles
2 = 2 poles
3 = 3 poles
4 = 4 poles
Trip Unit Rating/
Plug Ampere Rating
070
090
100
125
150
175
200
225
250
Suffix
T = Trip unit thermal-magnetic fixed thermal
adj. magnetic
V = 50oC calibration (thermal-magnetic
trip units only)
Table 2. Circuit Breaker/Frame
JD 3 250 F
Circuit Breaker/
Frame Type
JDB
JD
HJD
JDC
Number of Poles
2 = 2 poles
3 = 3 poles
4 = 4 poles
Circuit Breaker/Frame
Ampere Rating
070
090
100
125
150
175
200
225
250
Suffix
C
F
K
V
W
X
Y
= Non-aluminum terminals
= Frame only
= High magnetic molded case switch
= 50oC calibration
= Without terminals
= Load side terminals only
= Line side terminals only
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3
Time Current Curves TD012033EN
Series C
J-Frame
Effective April 2014
Series C types JDB, JD, HJD equiped with type JT thermal-magnetic trip unit
Circuit Breaker Time/Current Curves
Series C J-Frame Circuit Breakers
Equipped With Type JT Thermal-Magnetic Trip Unit
10000
2 hours
Catalog Types: JDB, JD, HJD Circuit Breakers, 2, 3 and 4 Poles.
For application and coordination purposes only. Thermal calibration based on 40°C ambient, cold start.
Connected with four (4) feet of rated wire (60°C up to 125 amps, 75°C above 125 amps) per terminal.
Tested in open air with current in all poles. Instantaneous calibration based on single-pole tests.
1 hour
5000
Maximum Voltage: 600V, AC (50/60 Hz) 250V, DC
Breaker Rating
1000
maximum single pole trip
times at 25°C (note 1)
500
70 - 250A
Rated
Amperes (In)
Instantaneous Trip Amperes
(See Figure Below)
70-250
500 to 1000% of trip unit rating (DC values are approximately 40% higher)
Interrupting Rating
UL/CSA rms Sym. kA, 50/60 Hz
Breaker Type
240V
JDB
LD
HJD
1 minute
50
minimum
kA, DC
600V
250V
6535 18
6535 18
10065 35
100
maximum
480V
10
10
22
IEC 60947-2 rms Sym. kA, 50/60 Hz
kA, DC
Breaker Type
240V, (Ue)
250V, (Ue)
JDB
JD
HJD
65353510
65353510
100656522
380V, (Ue)
415, (Ue)
Note:
1
Single pole data at 25°C based on NEMA Procedures for verifying performance
of molded case circuit breakers.
TIME IN SECONDS
10
5
Amps (I n )
Individual Pole
Adjustments
0.5
10X ± 10%
5X ± 20%
1
40°C
Cat. No.
Typical
Trip Unit
Nameplate
adjustable magnetic trip
0.1
0.05
maximum interrupting time
interrupting rating
determines end of
curve
0.01
0.005
0.001
10
50
100
500
1,000
5,000
CURRENT IN PERCENT OF BREAKER TRIP UNIT RATING (I n)
Figure 1. JDB, JD, HJD 2, 3 and 4 Poles - Curve Number SC-4247-87D, June 2006
4
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10,000
50,000
100,000
Time Current Curves TD012033EN
Series C
J-Frame
Effective April 2014
Series C type JDC equipped with type JT thermal-magnetic trip unit
Circuit Breaker Time/Current Curves
Series C J-Frame Circuit Breakers
Equipped With Type JT Thermal-Magnetic Trip Unit
2 hour
10000
Catalog Types: JDC Circuit Breakers, 2, 3 and 4 Poles.
For application and coordination purposes only. Thermal calibration based on 40°C ambient, cold start.
Connected with four (4) feet of rated wire (60°C up to 125 amps, 75°C above 125 amps) per terminal.
Tested in open air with current in all poles. Instantaneous calibration based on single-pole tests.
1 hour
5000
Maximum Voltage: 600V, AC (50/60 Hz) 250V, DC
Breaker Rating
1000
maximum single pole trip
times at 25°C (note 1)
500
Rated
Amperes (In)
Instantaneous Trip Amperes
(See Figure Below)
70-250
500 to 1000% of trip unit rating (DC values are approximately 40% higher)
70 - 250A
Interrupting Rating
UL/CSA rms Sym. kA, 50/60 Hz
Breaker Type
240V
JDC
1 minute
100
maximum
50
480V
kA, DC
600V
250V
200100 35
22
IEC 60947-2 rms Sym. kA, 50/60 Hz
kA, DC
Breaker Type
240V, (Ue)
250V, (Ue)
JDC
20010010022
380V, (Ue)
415, (Ue)
Note:
minimum
1
Single pole data at 25°C based on NEMA Procedures (AB 4) for verifying performance
of molded case circuit breakers.
TIME IN SECONDS
10
5
Amps (In )
40°C
Typical
Trip Unit
Nameplate
Individual Pole
Adjustments
0.5
10X ± 10%
5X ± 20%
1
Cat. No.
adjustable magnetic trip
0.1
0.05
maximum interrupting time
600V AC
480V AC
0.01
interrupting rating
determines end of
curve
240V AC
0.005
0.001
10
50
100
500
1,000
5,000
10,000
50,000
100,000
CURRENT IN PERCENT OF BREAKER TRIP UNIT RATING (I n)
Figure 2. JDC 2, 3 and 4 Poles - Curve Number SC-4248-87C, June 2006
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5
Time Current Curves TD012033EN
Series C
J-Frame
Effective April 2014
100 kA
50 kA
10 kA
Available Short Circuit Current, kA rms
500 kA
FDC3225
JDC3250
LDC3600
KDC3400
1000 kA
5 kA
10,000
100,000
500,000
1,000,000
5,000,000
10,000,000
1 kA
Peak Let-Through I2t, A2 sec
Figure 3. Peak Let-Through I2t Curve — 240 V - Curve Number AD-29-166A
100 kA
50 kA
10 kA
avail. Ip for 1st
symm. 1/2 cycle
5 kA
Peak Let-Through Current, kA
Figure 4. Peak Let-Through Current Curve — 240 V - Curve Number AD-29-166A
6
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1 kA
5 kA
10 kA
50 kA
100 kA
1 kA
Available Short Circuit Current, kA rms
500 kA
FDC3225
JDC3250
KDC3400
LDC3600
1000 kA
Time Current Curves TD012033EN
Series C
J-Frame
Effective April 2014
1000 kA
100 kA
50 kA
10 kA
Available Short Circuit Current, kA rms
FDC3225
JDC3250
LDC3600
KDC3400
500 kA
5 kA
100,000
500,000
1,000,000
5,000,000
10,000,000
1 kA
Peak Let-Through I2t, A2 sec
Figure 5. Peak Let-Through I2t Curve — 480 V - Curve Number AD-29-166B
1000 kA
100 kA
JDC3250
50 kA
5 kA
avail. Ip for 1st
symm. 1/2 cycle
FDC3225
10 kA
Available Short Circuit Current, kA rms
LDC3600
KDC3400
500 kA
1 kA
5 kA
10 kA
50 kA
100 kA
1 kA
Peak Let-Through Current, kA
Figure 6. Peak Let-Through Current — 480 V - Curve Number AD-29-166B
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7
Time Current Curves TD012033EN
Series C
J-Frame
Effective April 2014
JDC3250
10 kA
5 kA
Available Short Circuit Current, kA rms
50 kA
FDC3150
LDC3600
KDC3400
100 kA
100,000
500,000
1,000,000
5,000,000
10,000,000
1 kA
Peak Let-Through I2t, A2 sec
Figure 7. Peak Let-Through I2t — 600 V - Curve Number AD-29-166C
KDC3400
LDC3600
100 kA
10 kA
avail. Ip for 1st
symm. 1/2 cycle
5 kA
Peak Let-Through Current, kA
Figure 8. Peak Let-Through Current — 600 V - Curve Number AD-29-166C
8
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1 kA
5 kA
10 kA
50 kA
100 kA
1 kA
Available Short Circuit Current, kA rms
JDC3250
FDC3150
50 kA
Time Current Curves TD012033EN
Series C
J-Frame
Effective April 2014
100
1 min
Circuit Breaker Time/Current Curves
Earth Leakage Circuit Breaker - UL
1.
ELFD, JD, and KD earth leakage module 3 and 4 pole. 110 - 480V 60hz.
2.
For application and coordination purposes only. -20C to 50C ambient.
3.
Total clearing times include the response time of the earth leakage
module, opening time of the breaker, and interruption of current.
4.Pickup setting of .03A only available with instantaneous time delay.
10
*Curves do not apply to single phase applications.
5
2.0
1
1.0
0.5
0.5
Time
Delay
Setting
(s)
0.2
TIME
(s)
0.1
0.15
0.05
INST
0.01
0.005
0.001
0.5
1
1.5
2
3
4
10
5
EARTH LEAKAGE CURRENT IN MULTIPLES OF I n
AVAILABLE PICKUP SETTINGS - 0.03 (4), 0.1, 0.3, 0.5, 1, 3, 10, 30A.
Ambient Temp. (250 C)
Figure 9. UL Series C K-Frame Circuit breaker Earth Leakage Module, 110-480V - Curve Number TC01212005E, March 2003
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9
Time Current Curves TD012033EN
Series C
J-Frame
Effective April 2014
100
1 min
Circuit Breaker Time/Current Curves
Earth Leakage Circuit Breaker - IEC
1.
ELFD, JD, and KD earth leakage module 3 and 4 pole. *110 - 480V 50hz.
2.
For application and coordination purposes only. -20C to 50C ambient.
3.
Total clearing times include the response time of the earth leakage module, opening time of the breaker, and interruption of current.
4.Pickup setting of .03A only available with instantaneous time delay.
10
*Curves do not apply to single phase applications.
5
1.0
1
0.5
0.5
0.25
TIME
(s)
Time
Delay
0.1 Setting
(s)
0.06
0.1
0.05
INST
0.01
0.005
0.001
0.5
1
1.5
2
4
3
5
10
EARTH LEAKAGE CURRENT IN MULTIPLES OF I n
AVAILABLE PICKUP SETTINGS - 0.03 (4), 0.1, 0.3, 0.5, 1, 3, 10, 30A.
Ambient Temp. (250C)
Figure 10. IEC Series C K-Frame Circuit breaker Earth Leakage Module, 110-480V - Curve Number TC01212006E, March 2003
10
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Series C
J-Frame
Time Current Curves TD012033EN
Effective April 2014
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11
Time Current Curves TD012033EN
Effective April 2014
Series C
J-Frame

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Publication No. TD012033EN / KDC
April 2014
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