Application Data AD29167K
Effective April 2013
Supersedes June 2012
AB DE-IONT circuit breakers
Time/current characteristic curves
for Eaton Series C K-Frame circuit breakers
Contents
Description
Curve No. Page
Series CT Type DK Circuit Breakers ...............................................................SC-4117-87B ...................... 3
Series C Types KDB, KD, HKD Circuit Breakers
Equipped with Type KT Thermal-Magnetic Trip Unit .....................................SC-4118-87B ...................... 4
Series C Type KDC Circuit Breakers Equipped with
Type KT Thermal-Magnetic Trip Unit .............................................................SC-4119-87B ...................... 5
Series C Types KD, CKD, HKD, CHKD Circuit Breakers
Equipped with Type KES DigitripE RMS 310+
Trip Units (250A and 400A)
Long Delay (LD) and Short Delay (SD) with
Flat Response and Override (KES3250LSI, KES3400LSI,
KES3250LSIG, KES3400LSIG) ........................................................................TD012007EN ..................... 6
Long Delay Response and Short Delay with
I2T Response Curve and Override (KES3250LS,
KES3400LS, KES3250LSG, KES3400LSG) .....................................................TD012008EN ..................... 7
Series C Type KDC Circuit Breakers Equipped with
Type KES Digitrip RMS 310+ Trip Units (250A and 400A)
Long Delay (LD) and Short Delay (SD) with
Flat Response and Override (KES3250LSI, KES3400LSI,
KES3250LSIG, KES3400LSIG) ........................................................................TD012012EN ...................... 8
Long Delay Response and Short Delay with
I2T Response Curve and Override (KES3250LS,
KES3400LS, KES3250LSG, KES3400LSG) .....................................................TD012013EN ...................... 9
Ground Fault Delay Response and Maintenance Mode for
Series C Types KD, CKD, HKD, CHKD, and KDC Circuit Breakers
Equipped with Digitrip RMS 310+ Trip Units (250A and 400A)
Ground Fault Delay Response Curve (250A and 400A) .................................TD012009EN ................... 10
Remote Maintenance Mode Setting (250A and 400A) ..................................TD012010EN .................... 11
Series C Types KD, CKD, HKD, CHKD Circuit Breakers
Equipped with Type KES Digitrip RMS 310 Trip Units
Types KES3125LS, KES3125LSG ....................................................................SC-5642-93 .......................12
Types KES3125LSI, KES3125LSIG .................................................................SC-5643-93 .......................13
Series C Type KDC Circuit Breakers Equipped with
Type KES Digitrip RMS 310 Trip Units
Types KES3125LS, KES3125LSG ....................................................................SC-5648-93 .......................14
Types KES3125LSI, KES3125LSIG .................................................................SC-5649-93 .......................15
Ground Fault Protection (KES3125LSG, KES3125LSIG) .................................SC-5652-93 .......................16
Application Data AD29167K



Effective April 2013
Appendix
Description
Curve No. Page
Obsoleted Type KES Digitrip RMS 310 Trip Units
(250A and 400A) Replaced with Type KES Digitrip
RMS 310+ Trip Units on Front Page
Series C Types KD, CKD, HKD, CHKD Circuit Breakers
Equipped with Type KES Digitrip RMS 310 Trip Units
Types KES3400LS, KES3400LSG ...................................................................SC-5638-93 ....................... 17
Types KES3400LSI, KES3400LSIG .................................................................SC-5639-93 .......................18
Types KES3250LS, KES3250LSG ...................................................................SC-5640-93 .......................19
Types KES3250LSI, KES3250LSIG .................................................................SC-5641-93 .......................20
Series C Type KDC Circuit Breakers Equipped with
Type KES Digitrip RMS 310 Trip Units
Types KES3400LS, KES3400LSG ...................................................................SC-5644-93 ...................... 21
Types KES3400LSI, KES3400LSIG .................................................................SC-5645-93 ...................... 22
Types KES3250LS, KES3250LSG ...................................................................SC-5646-93....................... 23
Types KES3250LSI, KES3250LSIG .................................................................SC-5647-93 ...................... 24
Ground Fault Protection (KES3400LSG, KES3400LSIG) .................................SC-5650-93 ...................... 25
Ground Fault Protection (KES3250LSG, KES3250LSIG) .................................SC-5651-93 ...................... 26
NNote: Individual oversize copies of curves listed above printed on onion-skin paper are available in limited quantity.
When ordering onion-skin curves, use number at bottom of page where curve appears, e.g., SC-4117-87B.
Requests for full sets of curves will not be honored.
2
eaton www.eaton.com
Application Data AD29167K



Effective April 2013
10,000
2 HOURS
2 HOURS
50,000
40,000
30,000
Circuit Breaker Time/Current Curves
Series C ® K-Frame Circuit Breakers
5,000
For application and coordination purposes only.
Based on 40°C ambient, cold start. Connected with four (4) feet of
rated wire (75°C) per terminal. Tested in open air with current in
all poles. Instantaneous calibration based on single-pole tests.
3,000
Maximum Voltage
240 Vac (60 Hz)
250 Vdc
2,000
500
Instantaneous Trip Amperes
200
1,000
500 to 1000% of trip unit rating
(See Figure Below)
(DC values are approximately 40% higher)
500
Interrupting Rating
Breaker
RMS Sym
Type
Amperes
@ 240 Vac
DK
65,000
(250–400A) Maximum Single-Pole
Trip Times at 25°C
300
Amperes
@ 240 Vdc
300
10,000
Single-pole data at 25°C based on NEMA Procedures
(AB 4-1991) for verifying performance of molded-case
circuit breakers.
Minimum
Maximum
200
Note: For additional information on the trip unit, see IL 29C603.
100
100
50
50
30
30
20
20
7.5
Typical
Trip Unit
Nameplate
10
10
7.5
C Thermal
Magnetic
Trip Unit
5
10
5
7.5
Push to Trip
5
Amps
(In)
Magnetic
Multiples Of In
10
40°C
1 MINUTE
1 MINUTE
3,000
2,000
Breaker Rating
Rated Amperes (I n )
250
300
350
400
1,000
1 HOUR
Catalog Type DK Thermal-Magnetic Circuit Breakers, 250–400
Amperes, Two- and Three-Poles, 240 Vac Max., 250 Vdc
5,000
1 HOUR
20,000
6000
7000
8000
9000
10,000
5000
4000
3000
2000
600
700
800
900
1000
500
400
300
200
70
80
90
100
10,000
60
50
CURRENT IN PERCENT OF BREAKER TRIP UNIT RATING (In)
60,000
70,000
80,000
90,000
100,000
AB DE-ION Circuit Breakers
5
10
Cat.
No.
5
Individual Pole
Adjustments
3
3
1
1
.5
5X
±20%
10X
2
.5
±10%
.3
.3
.2
.2
.1
.1
.05
.05
.03
.03
.02
.02
Maximum Interrupting Time
.01
.01
60,000
70,000
80,000
90,000
100,000
CURRENT IN PERCENT OF BREAKER TRIP UNIT RATING (In)
50,000
40,000
30,000
20,000
6000
7000
8000
9000
10,000
5000
4000
3000
.001
2000
.001
600
700
800
900
1000
.002
500
.002
400
.003
300
.003
200
.005
60
70
80
90
100
.005
50
TIME IN SECONDS
TIME IN SECONDS
Adjustable Magnetic Trip
2
Figure 1. Series C Type DK Circuit Breakers
eaton www.eaton.com
3
Application Data AD29167K



Effective April 2013
10,000.000
K-Frame Circuit Breaker Time/Current Curves
For application and coordination purposes only. Based on cold start
at rated ambient temperature. Connected with four (4) feet of rated
wire (60/75°C) per terminal with all poles wired in series. Tested in
open air.
Breaker Rating
Rated Amperes (I m)
Instantaneous Trip
100, 125, 175, 200,
Settings are 500 to 1000% of trip
225, 250, 300, 350, 400
unit rating.
For DC, instantaneous trip may
be 42% higher.
Maximum
Minimum
1000.000
Interruption Rating (UL/CSA Listed)
Breaker
Symmetrical rms Amperes (kA)
Type
KDB
KD
HKD
100.000
10.000
240 Vac
65
65
100
480 Vac
35
35
65
600 Vac
25
25
35
Amps(kA)
250 Vdc
10
10
22
Time in Seconds
Maximum Single-Pole Trip Times
at 25°C
+30%–20%
+30%–20%
1.000
Adjustable Magnetic Trip
0.100
Maximum
Minimum
Interruption Rating Determines
End of Curve
0.010
0.001
10
100
1000
10,000
Current in Percent of Breaker Trip Unit Rating (In)
100,000
Figure 2. Series C Types KDB, KD, HKD Circuit Breakers Equipped with Type KT Thermal-Magnetic Trip Unit
4
eaton www.eaton.com
1,000,000
Application Data AD29167K



10,000
2 HOURS
2 HOURS
50,000
40,000
30,000
Circuit Breaker Time/Current Curves
Series C® K-Frame Circuit Breakers
Equipped with Type KT Thermal-Magnetic Trip Unit
5,000
Catalog Type KDC Current Limiting Circuit Breakers, 2-, 3- and 4-Pole
For application and coordination purposes only.
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.
3,000
2,000
1 HOUR
5,000
1 HOUR
20,000
6000
7000
8000
9000
10,000
5000
4000
3000
2000
600
700
800
900
1000
500
400
300
200
70
80
90
100
10,000
60
50
CURRENT IN PERCENT OF BREAKER TRIP UNIT RATING (In)
60,000
70,000
80,000
90,000
100,000
Effective April 2013
3,000
2,000
Maximum Voltage
600 Vac (60 Hz)
250 Vdc
1,000
500
(250–400A)
300
(125–225A)
200
1,000
Breaker Rating
Rated Amperes (In)
Instantaneous Trip Amperes
100, 125, 150,
175, 200, 225,
250, 300, 350,
400
500 to 1000% of trip unit rating
(See Figure Below)
(Dc values are approximately 40% higher)
Interrupting Rating (UL/CSA)
RMS Sym Amperes
Breaker
Type
@ 240 Vac
@ 480 Vac
Maximum Single-Pole
Trip Times at 25°C
200,000
KDC
500
Amperes
100,000
@ 600 Vac
@ 250 Vdc
50,000
22,000
300
Single-pole test data at 25°C based on NEMA Procedures
(AB 4-1991) for verifying performance of molded-case circuit
breakers.
(100A)
200
Note: For additional information on the trip unit, see IL 29C603.
100
Minimum
Maximum
50
50
30
30
20
1 MINUTE
1 MINUTE
100
20
7.5
Typical
Trip Unit
Nameplate
10
10
7.5
C Thermal
Magnetic
Trip Unit
5
10
5
5
Amps
(In)
Magnetic
Multiples Of In
7.5
Push to Trip
10
40°C
5
10
Cat.
No.
5
Individual Pole
Adjustments
3
3
2
1
1
.5
5X
±20%
10X
2
TIME IN SECONDS
TIME IN SECONDS
Adjustable Magnetic Trip
.5
±10%
.3
.3
.2
.2
.1
.1
.05
.05
.03
.03
.02
.02
Maximum Interrupting Time
600 Vac
.01
.01
480 Vac
.005
.005
240 Vac
.003
.003
Interrupting Rating
Determines End
of Curve
.002
.001
60,000
70,000
80,000
90,000
100,000
CURRENT IN PERCENT OF BREAKER TRIP UNIT RATING (In)
50,000
40,000
30,000
20,000
6000
7000
8000
9000
10,000
5000
4000
3000
2000
600
700
800
900
1000
500
400
300
200
60
70
80
90
100
.001
50
.002
Figure 3. Series C Type KDC Circuit Breakers Equipped with Type KT Thermal-Magnetic Trip Unit
eaton www.eaton.com
5
Application Data AD29167K



Effective April 2013
Current in Multiples of (Ir)
2 HOURS
.5
.7
1
2
3
4
7
5
10
20
30
10000
9000
8000
7000
Circuit Breaker Time/Current Curves (Phase Current)
6000
1 HOUR
5000
K-Frame Circuit Breakers (250A and 400A)
KDB, CKDB, HKDB, CHKDB Series C circuit breakers using 310+ trip unit
1.15
4000
3000
Long Delay (LD) and Short Delay (SD) with Flat Response (LSI, LSIG)
2000
In
IR
1000
900
800
700
A
B
C
D
E
F
G
H
Maximum Total
Clearing Time
600
250A
400A
100A
125A
150A
160A
175A
200A
225A
250A
160A
200A
225A
250A
300A
315A
350A
400A
500
Notes:
400
1. Curve accuracy applies from –20°C to +55°C ambient. Temperatures above +88°C cause an
over-temperature protection trip. For possible continuous ampere derating for ambient above
40°C, refer to Eaton.
300
1 MINUTE
200
2. Application frequency is 50/60 Hertz.
3. There is a memory effect that can act to shorten the Long Delay. The memory effect comes into
play if a current above the circuit breaker itself. A subsequent overload will cause the circuit
breaker to trip in shorter time than normal. The amount of time delay reduction is inverse to the
amount of time that has elapsed since the previous overload. Approximately five minutes is
required between overloads to completely reset memory.
Available Long Delay Time:
2, 4, 7, 10, 12, 15, 20, 24 sec.
Shown at 6 x IR
2, 4, 7, 15, 24
seconds +0/–30%
100
90
80
70
60
4. The right portion of the curve is determined by the interrupting rating of the circuit breaker.
50
5. The left portion of the curve is shown as a multiple of the Long Delay Setting.
(Long Delay Pickup = 115% of Ir). Range is 110%–120%.
40
30
.
.
24
20
TIME IN SECONDS
6. Total clearing times shown include the response times of the trip unit, the breaker opening,
and the interruption of the current.
15
Minimum Total
Clearing Time
10
9
8
7
6
7. The Short Delay Pick Up has 9 settings/positions, 2–8 and 10, 12 IR.
8. For high fault current levels, an additional fixed instantaneous hardware override is provided at
4400A (Tolerance ±15%). For IR = In = 400A, the fixed instantaneous hardware override takes
precedence over the SDPU setting of 12 x IR.
.
Interrupting Ratings—50/60 Hz
RMS Sym. Amperes (kA)
7
5
240V
480V
600V
4
KD, CKD
HKD, CHKD
65
100
35
65
25
35
.
Breaker
Type
240V
380V
415V
2
KD, CKD
HKD, CHKD
65
100
40
65
40
65
.
4
3
2
2
1
.9
.8
.7
.6
UL/CSA
Breaker
Type
4
IEC 947-2
1
12
Available Short Delay
Pick Up Settings
2–8, 10, 12 x IR ±5%
(See Note 7)
6
3
8
5
.5
.4
.3
.5
.4
.2
300 ms
(P, Q, R)
.3
.1
.2
TIME IN SECONDS
7
120 ms
(M, N, O)
.1
.09
.08
.07
10
.06
Inst.
(J, K, L)
.05
.05
Fixed Instantaneous
Override 4400A
.04
.03
Interrupting
Rating
Determines
End of
Curve
.02
.01
.04
.03
.02
30
40
50
70
100,000
Current in Multiples of (Ir)
20
50,000
10
40,000
7
30,000
5
20,000
4
10,000
3
5000
2
4000
1
3000
.7
2000
.001
.5
1000
.01
Current in Amps
Figure 4. Series C Types KD, CKD, HKD, CHKD Circuit Breakers Equipped with Type KES Digitrip RMS 310+ Trip Units (250A and 400A),
Long Delay (LD) and Short Delay (SD) with Flat Response and Override (KES3250LSI, KES3400LSI, KES3250LSIG, KES3400LSIG)
6
eaton www.eaton.com
Application Data AD29167K



Effective April 2013
Current in Multiples of (Ir)
2 HOURS
.5
.7
1
2
3
4
7
5
10
20
30
10000
9000
8000
7000
Circuit Breaker Time/Current Curves (Phase Current)
6000
1 HOUR
5000
K-Frame Circuit Breakers (250A and 400A)
KDB, CKDB, HKDB, CHKDB Series C circuit breakers using 310+ trip unit
1.15
4000
3000
Long Delay (LD) and Short Delay (SD) with I2T Response (LS, LSG)
2000
In
IR
1000
900
800
700
A
B
C
D
E
F
G
H
Maximum Total
Clearing Time
600
250A
400A
100A
125A
150A
160A
175A
200A
225A
250A
160A
200A
225A
250A
300A
315A
350A
400A
500
Notes:
400
1. Curve accuracy applies from –20°C to +55°C ambient. Temperatures above +88°C cause an over
temperature protection trip. For possible continuous ampere derating for ambient above 40°C,
refer to Eaton.
300
1 MINUTE
200
2. Application frequency is 50/60 Hertz.
3. There is a memory effect that can act to shorten the Long Delay. The memory effect comes into play
if a current above the circuit breaker itself. A subsequent overload will cause the circuit breaker
to trip in shorter time than normal. The amount of time delay reduction is inverse to the amount of
time that has elapsed since the previous overload. Approximately five minutes is required between
overloads to completely reset memory.
Available Long Delay Time:
2, 4, 7, 10, 12, 15, 20, 24 sec.
Shown at 6 x IR
2, 4, 7, 15, 24
Seconds +0/–30%
100
90
80
70
60
4. The right portion of the curve is determined by the interrupting rating of the circuit breaker.
50
5. The left portion of the curve is shown as a multiple of the Long Delay Setting
(Long Delay Pickup = 115% of IR). Range is 110%–120%.
40
30
.
.
TIME IN SECONDS
6. Total clearing times shown include the response times of the trip unit, the breaker opening, and the
interruption of the current.
24
20
8. Short Delay I2T band has a tolerance of ±15%.
15
Minimum Total
Clearing Time
10
9
8
7
6
7. The Short Delay Pickup has 9 settings/positions: 2–8 and 10, 12 IR.
9. Breakpoint back to FLAT response occurs at 8x IR for upper line of the I2T curve.
.
10. For high fault current levels, an additional fixed instantaneous hardware override is provided at
4400A (Tolerance ±15%). For IR = In = 400A, the fixed instantaneous hardware override takes
precedence over the SDPU setting of 12 x IR.
7
5
.
4
Interrupting Ratings—50/60 Hz
RMS Sym. Amperes (kA)
4
3
2
.
3
2
2
4
1
.9
.8
.7
.6
UL/CSA
Breaker
Type
240V
480V
600V
KD, CKD
HKD, CHKD
65
100
35
65
25
35
IEC 947-2
Breaker
Type
240V
380V
415V
KD, CKD
HKD, CHKD
65
100
40
65
40
65
5
.5
7
.4
.1
.3
12
8
Available Short Delay
Pickup Settings
2–8, 10, 12 x IR ±5%
(See Note 7)
.2
6
.1
.09
.08
.07
10
.
.06
67 ms
.05
.04
Fixed Instantaneous
Override 4400A
.04
.03
TIME IN SECONDS
I2T Short Delay
(See Note 8)
.05
Interrupting
Rating
Determines
End of
Curve
.02
.01
.03
See Note 9
.02
.01
40
50
70
100,000
30
50,000
20
40,000
10
20,000
7
30,000
5
10,000
4
Current in Multiples of (Ir)
5000
3
4000
2
3000
1
2000
.7
1000
.001
.5
Current in Amps
Figure 5. Series C Types KD, CKD, HKD, CHKD Circuit Breakers Equipped with Type KES Digitrip RMS 310+ Trip Units (250A and 400A),
Long Delay Response and Short Delay with I2T Response Curve and Override (KES3250LS, KES3400LS, KES3250LSG, KES3400LSG)
eaton www.eaton.com
7
Application Data AD29167K



Effective April 2013
Current in Multiples of (Ir)
2 HOURS
.5
.7
1
2
3
4
7
5
10
20
30
10000
9000
8000
7000
Circuit Breaker Time/Current Curves (Phase Current)
6000
1 HOUR
5000
K-Frame Circuit Breakers (250A and 400A)
KDC Series C circuit breakers using 310+ trip unit
1.15
4000
3000
Long Delay (LD) and Short Delay (SD) with Flat Response (LSI, LSIG)
2000
In
IR
1000
900
800
700
A
B
C
D
E
F
G
H
Maximum Total
Clearing Time
600
250A
400A
100A
125A
150A
160A
175A
200A
225A
250A
160A
200A
225A
250A
300A
315A
350A
400A
500
Notes:
400
1. Curve accuracy applies from –20°C to +55°C ambient. Temperatures above +88°C cause an
over-temperature protection trip. For possible continuous ampere derating for ambient above
40°C, refer to Eaton.
300
1 MINUTE
200
2. Application frequency is 50/60 Hertz.
3. There is a memory effect that can act to shorten the Long Delay. The memory effect comes into
play if a current above the circuit breaker itself. A subsequent overload will cause the circuit
breaker to trip in shorter time than normal. The amount of time delay reduction is inverse to the
amount of time that has elapsed since the previous overload. Approximately five minutes is
required between overloads to completely reset memory.
Available Long Delay Time:
2, 4, 7, 10, 12, 15, 20, 24 sec.
Shown at 6 x IR
2, 4, 7, 15, 24
Seconds +0/–30%
100
90
80
70
60
4. The right portion of the curve is determined by the interrupting rating of the circuit breaker.
50
5. The left portion of the curve is shown as a multiple of the Long Delay Setting.
(Long Delay Pickup = 115% of IR). Range is 110%–120%.
40
30
.
.
TIME IN SECONDS
6. Total clearing times shown include the response times of the trip unit, the breaker opening, and
the interruption of the current.
24
20
8. For high fault current levels, an additional fixed instantaneous hardware override is provided at
4400A (Tolerance ±15%). For IR = In = 400A, the fixed instantaneous hardware override takes
precedence over the SDPU setting of 12 x IR.
15
Minimum Total
Clearing Time
10
9
8
7
6
7. The Short Delay Pickup has 9 settings/positions, 2–8 and 10, 12 IR.
.
Interrupting Ratings—50/60 Hz
RMS Sym. Amperes (kA)
7
5
.
4
UL/CSA
Breaker
Type
240V
200
KDC
480V
600V
100
65
4
3
IEC 947-2
Breaker
Type
.
2
240V
KDC
200
380V
415V
100
50
2
2
1
.9
.8
.7
.6
1
4
12
Available Short Delay
Pickup Settings
2–8, 10, 12 x IR ±5%
(See Note 7)
6
3
8
5
.5
.4
300 ms
(P, Q, R)
.3
.1
7
120 ms
(M, N, O)
.1
.09
.08
.07
10
.06
Inst.
(J, K, L)
.05
TIME IN SECONDS
.2
.05
Fixed Instantaneous
Override 4400A
.04
.03
Interrupting
Rating
Determines
End of
Curve
Maximum
Interrupting
Time
.02
600 Vac
.01
480 Vac
240 Vac
.04
.03
Current in Multiples of (Ir)
20
30
40
50
200,000
10
100,000
7
50,000
5
40,000
4
30,000
3
20,000
2
10,000
1
5000
.7
4000
.5
3000
.001
.01
2000
.02
Current in Amps
Figure 6. Series C Type KDC Circuit Breakers Equipped with Type KES Digitrip RMS 310+ Trip Units (250A and 400A), Long Delay (LD)
and Short Delay (SD) with Flat Response and Override (KES3250LSI, KES3400LSI, KES3250LSIG, KES3400LSIG)
8
eaton www.eaton.com
Application Data AD29167K



Effective April 2013
2 HOURS
Current in Multiples of (Ir)
10000
9000
8000
7000
.5
.7
1
3
4
5
7
10
20
30
Circuit Breaker Time/Current Curves (Phase Current)
6000
5000
1 HOUR
2
K-Frame Circuit Breakers (250A and 400A)
KDC Series C circuit breakers using 310+ trip unit
1.15
4000
3000
Long Delay (LD) & Short Delay (SD) with I2T Response (LS, LSG)
2000
In
IR
1000
900
800
700
A
B
C
D
E
F
G
H
Maximum Total
Clearing Time
600
250A
400A
100A
125A
150A
160A
175A
200A
225A
250A
160A
200A
225A
250A
300A
315A
350A
400A
500
Notes:
400
1. Curve accuracy applies from –20°C to +55°C ambient. Temperatures above +88°C cause an overtemperature protection trip. For possible continuous ampere derating for ambient above 40°C,
refer to Eaton.
300
1 MINUTE
200
2. Application frequency is 50/60 Hertz.
3. There is a memory effect that can act to shorten the Long Delay. The memory effect comes into play
if a current above the circuit breaker itself. A subsequent overload will cause the circuit breaker
to trip in shorter time than normal. The amount of time delay reduction is inverse to the amount of
time that has elapsed since the previous overload. Approximately five minutes is required between
overloads to completely reset memory.
Available Long Delay Time:
2, 4, 7, 10, 12, 15, 20, 24 sec.
Shown at 6 x Ir
2, 4, 7, 15, 24
Seconds +0/–30%
100
90
80
70
60
4. The right portion of the curve is determined by the interrupting rating of the circuit breaker.
50
5. The left portion of the curve is shown as a multiple of the Long Delay Setting
(Long Delay Pickup = 115% of Ir). Range is 110%–120%.
40
30
.
.
20
TIME IN SECONDS
6. Total clearing times shown include the response times of the trip unit, the breaker opening, and the
interruption of the current.
24
8. Short Delay I2T band has a tolerance of ±15%.
15
Minimum Total
Clearing Time
10
9
8
7
6
7. The Short Delay Pickup has 9 settings/positions: 2–8 and 10, 12 IR.
9. Breakpoint back to FLAT response occurs at 8x IR for upper line of the I2T curve.
.
10. For high fault current levels, an additional fixed instantaneous hardware override is provided at
4400A (Tolerance ±15%). For IR= In= 400A, the fixed instantaneous hardware override takes
precedence over the SDPU setting of 12 x IR.
7
5
.
4
4
Interrupting Ratings—50/60 Hz
RMS Sym. Amperes (kA)
.
Breaker
Type
3
2
3
4
1
.9
.8
.7
.6
200
KDC
2
2
UL/CSA
240V
480V
600V
100
65
IEC 947-2
Breaker
Type
240V
KDC
200
380V
415V
100
50
5
.5
7
.4
.1
.3
12
8
Available Short Delay
Pickup Settings
2–8,10, 12 x IR ±5%
(See Note 7)
.2
6
.1
.09
.08
.07
10
.
.06
67 ms
.05
.04
Fixed Instantaneous
Override 4400A
.04
Maximum
Interrupting
Time
.03
TIME IN SECONDS
I2T Short Delay
(See Note 8)
.05
.02
600 Vac
.01
480 Vac
240 Vac
.03
See Note 9
.02
.01
Interrupting
Rating
Determines
End of
Curve
40
50
70
200,000
30
100,000
Current in Multiples of (Ir)
20
50,000
10
40,000
7
30,000
5
20,000
4
10,000
3
5000
2
4000
1
3000
.7
2000
.001
.5
Current in Amps
Figure 7. Series C Type KDC Circuit Breakers Equipped with Type KES Digitrip RMS 310+ Trip Units (250A and 400A), Long Delay
Response and Short Delay with I2T Response Curve and Override (KES3250LS, KES3400LS, KES3250LSG, KES3400LSG)
eaton www.eaton.com
9
Application Data AD29167K



Effective April 2013
.1
.2
.3
.4
.7
.5
1.0
2.0
10000
9000
8000
7000
Circuit Breaker Time/Current Curves (Ground Current)
6000
5000
K-Frame Circuit Breakers (250A and 400A)
KDB, CKDB, HKDB, CHKDB, and KDC Series C circuit breakers using 310+ trip unit
4000
3000
Ground fault delay response notes:
2000
1. Curve accuracy applies from –20°C to +55°C ambient. Temperatures above +88°C
cause an over-temperature protection trip. For possible continuous ampere derating
for ambient above 40°C, refer to Eaton.
2. Application frequency is 50/60 Hertz.
1000
900
800
700
3. Trip units are suitable for functional field testing with test kit style # 70C1056G52.
600
4. For LD Response and SD with Flat Response curve, see TD012007EN.
500
5. For LD Response and SD with I2T Response curve, see TD012008EN.
400
6. For Ground Fault Delay Response (this curve), see TD012009EN.
300
68C 4081 H03
REMOTE MM
STATUS
TEST / ALARM
200
1 MINUTE
IR ∑
Push to Trip
100
90
80
70
60
C
B
D E F
A
I sd (x IR )
t R (s)
G
H
LONG
10 12 15
7
20
4
24
2
4
3
SHORT
5 6 7
2
.6 .8 1.0
.4
.3
I g (x In)
.2
GND
120
tg
8
10
12 I i
Inst.
(ms)
GND
300
50
40
TIME IN SECONDS
30
68C 4081 H04
20
REMOTE MM
STATUS
IR ∑
Push to Trip
10
9
8
7
C
B
D E F
A
G
H
t R (s)
LONG
10 12 15
7
20
4
24
2
TEST / ALARM
I sd (x IR )
4
3
SHORT
5 6 7
2
8
10
12 I i
.6 .8 1.0
.4
.3
I g (x In)
.2
GND
M N O
L
K
J
R
P
Q
*
t sd / t g (ms)
SHORT / GND
Ground Fault Pickup Settings
(Tolerance 10%)
6
5
Note: Refer to table below for variations.
4
3
In
Ir
Available Sensors (In):
250A
400A
2
.4X
.2X
1
.9
.8
.7
1X
.6X
.3X
A
B
C
D
E
F
G
H
250A
400A
100A
125A
150A
160A
175A
200A
225A
250A
160A
200A
225A
250A
300A
315A
350A
400A
.8X
.6
.5
.4
300 ms
(L, O, R)
.3
Curves in this Family:
Long Delay Response and Short Delay with Flat Response — TD012007EN
Long Delay Response and Short Delay with I2T Response — TD012008EN
.2
Ground Fault Response Curve — TD012009EN
120 ms
(K, N, Q)
.1
.09
.08
.07
Remote Maintenance Mode Setting — TD012010EN
.06
Inst.
(J, M, P)
.05
.04
.03
.02
.01
.1
.2
.3
.4
.5
.7
1.0
2.0
Ground Current in Multiple of (In)
Figure 8. Series C Types KD, CKD, HKD, CHKD, and KDC Circuit Breakers Equipped with Digitrip RMS 310+ Trip Units (250A and 400A),
Ground Fault Delay Response Curve (250A and 400A)
10
eaton www.eaton.com
Application Data AD29167K



Effective April 2013
KES 310+ Trip Unit Nameplates
68C 4081 H01
K-Frame Circuit Breakers (250A and 400A)
KDB, CKDB, HKDB, CHKDB and KDC Series C circuit breakers
using 310+ trip unit
REMOTE MM
STATUS
IR∑
Response: The Remote Maintenance Mode Setting provides an
instantaneous response time of 30 ms or less.
Push to Trip
C
B
D E F
A
G
H
LONG
10 12 15
7
20
4
24
2
TEST / ALARM
I sd (xIR)
t R (s)
4
3
SHORT
5 6 7
2
8
10
12 I i
This curve is for 50 Hz and 60 Hz applications.
68C 4081 H02
REMOTE MM TEST / ALARM
STATUS
Notes:
IR∑
1. The Remote Maintenance Mode feature must be ENABLED via application of
24 Vdc for these curves to apply. The blue LED is lit when in Maintenance Mode.
Push to Trip
C
B
2. The end of the curve is determined by the interrupting rating of the
circuit breaker.
3. Total clearing times shown include the response times of the trip unit,
the breaker opening, and the interruption of the current.
68C 4081 H03
D E F
A
G
H
Push to Trip
68C 4081 H04
D E F
A
G
H
Push to Trip
A
LONG
10 12 15
7
20
4
24
2
4
3
G
H
LONG
10 12 15
7
20
4
24
2
8
10
12 I i
120
SHORT
5 6 7
2
8
10
12 I i
4
3
2
8
10
12 I i
300
SHORT
.6 .8 1.0
.4
.3
I g (xIn)
.2
GND
120
tg
Inst.
TEST / ALARM
SHORT
5 6 7
t sd (ms)
Inst.
TEST / ALARM
I sd (xIR)
t R (s)
IR∑
D E F
2
REMOTE MM
STATUS
Contact Eaton for additional information.
C
B
SHORT
5 6 7
I sd (xIR)
t R (s)
IR∑
C
B
I sd (xIR)
4
3
REMOTE MM
STATUS
4. Nominal Values (Pickup) (Tolerance is ±15%) 2.5 x In.
5. These curves are comprehensive for the complete family of KD Frame electronic
breakers, including all frame sizes, ratings, and constructions. The total clearing
times shown are conservative and consider the maximum response times of
the trip unit, the circuit breaker opening, and the interruption of the current in
the worst case conditions such as: maximum rated voltages, single-phase
interruption, and minimum power factor. Faster clearing times are possible
depending on the specific system conditions.
t R (s)
LONG
10 12 15
7
20
4
24
2
(ms)
GND
300
.6 .8 1.0
.4
.3
I g (xIn)
.2
GND
M N O
L
K
J
R
P
Q
*
t sd / t g (ms)
SHORT / GND
Remote Maintenance Mode Trip
10
9
8
7
6
5
4
3
2
1
.9
.8
.7
.6
2.5
.5
TIME IN SECONDS
.4
.3
.2
.1
.09
.08
.07
.06
Application
determines
end of curve
.05
.04
.03
.02
50
30
40
20
7
8
9
10
5
6
4
3
2
.6
.7
.8
.9
1
.5
.01
Current in Multiples of Rating ( In )
Figure 9. Series C Types KD, CKD, HKD, CHKD, and KDC Circuit Breakers Equipped with Digitrip RMS 310+ Trip Units (250A and 400A),
Remote Maintenance Mode Setting (250A and 400A)
eaton www.eaton.com
11
Application Data AD29167K



Effective April 2013
10,000
.5
CURRENT IN MULTIPLES OF RATING PLUG AMPERES (In )
.6 .7 .8 .9 1
2
3
4
5
6 7 8 9 10
20
2 HOUR S
Circuit Breaker Time/Current Curves (Phase Current)
5,000
1 HOUR
Series C® K-Frame Circuit Breakers
Equipped With Type KES Digitrip RMS 310 Trip Units
Catalog Types KES3125LS, KES3125LSG Digitrip RMS 310 Trip Units for use with Circuit
Breaker Types KD, HKD, CKD, and CHKD, 125A. max.
3,000
Fixed Short Delay Time
Typical Trip Unit Nameplate
Digitrip RMS 310 Rating Plug
2,000
Short Delay
Pickup •x Ir
Cat.
Standard Fixed
Rating Plug
Push to Trip
In
4
3
Engaged
5
2
1,000
6
7
TEST
8
Digitrip RMS 310 Trip Unit
40oC
Remove
Available Rating Plugs
500
300
200
Long Delay Maximum Total
Clearing Time
1 MINUTE
Catalog
Number
125
110
100
90
70
70, 90, 100, 125
Fixed
Fixed
Fixed
Fixed
Fixed
Adjustable
1KES 125T
1KES 110T
1KES 100T
1KES 90T
1KES 70T
A1KES 125T1
3X
2X
480V
600V
35
65
25
35
240V
380V
415V
65
100
40
65
40
65
Notes
Digitrip RMS 310 trip units are suitable for functional field testing with test kit Cat. No.
STK2. For field testing using primary injection methods, follow NEMA publication
AB-4-1991.
20
There is a memory effect that can act to shorten the long delay. The memory effect
comes into play if a current above the long delay pickup value exists for a time and
then is cleared by the tripping of a downstream device or the circuit breaker itself.
A subsequent overload will cause the circuit breaker to trip in shorter time than normal.
The amount of time delay reduction is inverse to the amount of time that has elapsed
since the previous overload. Approximately five minutes is required between overloads
to completely reset the memory.
10
Short Delay
Pickup
Settings
(Tolerance
±10%)
4X
5
Short Delay
Pickup Range
Amperes
250–1000
220–880
200–800
180–720
140–560
140–1000
IEC 947-2
Breaker
Type
KD, CKD
HKD, CHKD
50
30
3
derating for ambient above 40ºC, refer to Eaton.
For high fault current levels, a fixed instantaneous override is provided at 4000A
(Tolerance ±15%).
8X
See above tabulation.
For ground fault time/current curve, see SC-5652-93.
6X
1
Curve accuracy applies from –20ºC to +55ºC ambient. For possible continuous ampere
The end of the curve is determined by the interrupting rating of the circuit breaker.
5X
2
TIME IN SECONDS
Type
Interrupting Ratings – 50/60 Hz
RMS Sym. Amperes (kA)
UL/CSA
Breaker
240V
Type
KD, CKD
65
HKD, CHKD
100
Long Delay Minimum Total
Clearing Time
100
Ampere
Rating (In)
.5
7X
.3
.2
.1
.1
.05
.05
Fixed Instantaneous
Override .04
.03
.02
.02
SECONDS
.03
.01
Interrupting
Rating
Determines
End of
Curve .01
.005
.003
.002
100,000
CURRENT IN AMPS
50,000
.001
40,000
20
30,000
6 7 8 9 10
20,000
5
10,000
4
5000
3
4000
2
CURRENT IN MULTIPLES OF RATING PLUG AMPERES (In )
3000
.6 .7 .8 .9 1
2000
.5
1000
.001
Figure 10. Series C Types KD, CKD, HKD, CHKD Circuit Breakers Equipped with Type KES Digitrip RMS 310 Trip Units,
Types KES3125LS, KES3125LSG
12
eaton www.eaton.com
Application Data AD29167K



Effective April 2013
10,000
.5
CURRENT IN MULTIPLES OF RATING PLUG AMPERES (In )
.6 .7 .8 .9 1
2
3
4
6 7 8 9 10
5
20
2 HOUR S
Circuit Breaker Time/Current Curves (Phase Current) Series C ® K-Frame Circuit Breakers
Equipped With Type KES Digitrip RMS 310 Trip Units
1 HOUR
5,000
Catalog Types KES3125LSI, KES3125LSIG Digitrip RMS 310 Trip Units for use with Circuit
Breaker Types KD, HKD, CKD, and CHKD, 125A. max.
3,000
Adjustable Short Delay Time
Typical Trip Unit Nameplate
Digitrip RMS 310 Rating Plug
2,000
Short Delay
Pickup •x Ir
Cat.
Standard Fixed
Rating Plug
Push to Trip
In
4
3
Engaged
5
2
1,000
6
7
8
Time • ms
200
100
300
TEST
INST
Digitrip RMS 310 Trip Unit
40oC
Remove
Available Rating Plugs
500
300
200
Long Delay Maximum Total
Clearing Time
1 MINUTE
Catalog
Number
125
110
100
90
70
70, 90, 100, 125
Fixed
Fixed
Fixed
Fixed
Fixed
Adjustable
1KES 125T
1KES 110T
1KES 100T
1KES 90T
1KES 70T
A1KES 125T1
Short Delay
Pickup Range
Amperes
250–1000
220–880
200–800
180–720
140–560
140–1000
480V
600V
35
65
25
35
IEC 947-2
Breaker
Type
KD, CKD
HKD, CHKD
50
30
240V
380V
415V
65
100
40
65
40
65
Notes
Digitrip RMS 310 trip units are suitable for functional field testing with test kit Cat. No.
STK2. For field testing using primary injection methods, follow NEMA publication
AB-4-1991.
2X
20
There is a memory effect that can act to shorten the long delay. The memory effect
comes into play if a current above the long delay pickup value exists for a time and
then is cleared by the tripping of a downstream device or the circuit breaker itself.
A subsequent overload will cause the circuit breaker to trip in shorter time than normal.
The amount of time delay reduction is inverse to the amount of time that has elapsed
since the previous overload. Approximately five minutes is required between overloads
to completely reset the memory.
4X
10
Short Delay
Pickup
Settings
(Tolerance
±10%)
6X
5
3
Curve accuracy applies from –20ºC to +55ºC ambient. For possible continuous ampere
derating for ambient above 40ºC, refer to Eaton.
For high fault current levels, a fixed instantaneous override is provided at 4000A
(Tolerance ±15%).
The end of the curve is determined by the interrupting rating of the circuit breaker.
See above tabulation.
8X
2
For ground fault time/current curve, see SC-5652-93.
7X
TIME IN SECONDS
Type
Interrupting Ratings – 50/60 Hz
RMS Sym. Amperes (kA)
UL/CSA
Breaker
240V
Type
65
KD, CKD
100
HKD, CHKD
Long Delay Minimum Total
Clearing Time
100
Ampere
Rating (In)
1
1
5X
3X
.5
300 ms
.3
200 ms
.2
100 ms
.1
.1
I
.05
.05
.04
.03
.02
.02
SECONDS
.03
.01
Fixed Instantaneous
Override Interrupting
Rating
Determines
End of
Curve .01
.005
.003
CURRENT IN AMPS
50,000
.001
40,000
20
30,000
6 7 8 9 10
20,000
5
10,000
4
5000
3
4000
2
CURRENT IN MULTIPLES OF RATING PLUG AMPERES (In )
3000
.6 .7 .8 .9 1
2000
.5
1000
.001
100,000
.002
Figure 11. Series C Types KD, CKD, HKD, CHKD Circuit Breakers Equipped with Type KES Digitrip RMS 310 Trip Units,
Types KES3125LSI, KES3125LSIG
eaton www.eaton.com
13
Application Data AD29167K



Effective April 2013
.5
CURRENT IN MULTIPLES OF RATING PLUG AMPERES (In )
.6 .7 .8 .9 1
2
3
4
5
6 7 8 9 10
20
Circuit Breaker Time/Current Curves (Phase Current)
2 HOUR S
10,000
Series C® K-Frame Circuit Breakers
Equipped With Type KES Digitrip RMS 310 Trip Units
1 HOUR
5,000
Catalog Types KES3125LS, KES3125LSG Digitrip RMS 310 Trip Units for use with Circuit
Breaker Types KDC, 125A. max.
3,000
Fixed Short Delay Time
Typical Trip Unit Nameplate
Short Delay
Digitrip RMS 310 Rating Plug
2,000
Pickup •x Ir
Cat.
Standard Fixed
Rating Plug
Push to Trip
In
4
3
Engaged
1,000
300
200
Long Delay Maximum Total
Clearing Time
1 MINUTE
TEST
Available Rating Plugs
Ampere
Rating (In)
Type
Catalog
Number
125
110
100
90
70
70, 90, 100, 125
Fixed
Fixed
Fixed
Fixed
Fixed
Adjustable
1KES 125T
1KES 110T
1KES 100T
1KES 90T
1KES 70T
A1KS 125T1
Interrupting Ratings – 50/60 Hz
RMS Sym. Amperes (kA)
UL/CSA
Breaker
240V
Type
KDC
200
Long Delay Minimum Total
Clearing Time
100
6
7
8
Digitrip RMS 310 Trip Unit
40oC
Remove
500
5
2
Short Delay
Pickup Range
Amperes
250–1000
220–880
200–800
180–720
140–560
140–1000
480V
100
600V
50
50
IEC 947-2
Breaker
Type
KDC
30
3X
2X
380V
415V
200
100
100
Notes
Digitrip RMS 310 trip units are suitable for functional field testing with test kit Cat. No.
STK2. For field testing using primary injection methods, follow NEMA publication
AB-4-1991.
20
There is a memory effect that can act to shorten the long delay. The memory effect
comes into play if a current above the long delay pickup value exists for a time and
then is cleared by the tripping of a downstream device or the circuit breaker itself.
A subsequent overload will cause the circuit breaker to trip in shorter time than normal.
The amount of time delay reduction is inverse to the amount of time that has elapsed
since the previous overload. Approximately five minutes is required between overloads
to completely reset the memory.
10
Short Delay
Pickup
Settings
(Tolerance
±10%)
4X
5
240V
3
Curve accuracy applies from –20ºC to +55ºC ambient. For possible continuous ampere
derating for ambient above 40ºC, refer to Eaton.
For high fault current levels, a fixed instantaneous override is provided at 4000A
See above tabulation.
For ground fault time/current curve, see SC-5652-93.
1
6X
TIME IN SECONDS
The end of the curve is determined by the interrupting rating of the circuit breaker.
8X
5X
(Tolerance ±15%).
2
.5
7X
.3
.2
.1
.1
.05
.05
Fixed Instantaneous
Override .04
.03
.02
.02
SECONDS
.03
.01
Interrupting
Rating
Determines
End of
Curve 600 Vac
.01
480 Vac
240 Vac
.005
.003
CURRENT IN AMPS
200,000
.001
100,000
20
50,000
6 7 8 9 10
40,000
5
30,000
4
20,000
3
10,000
2
CURRENT IN MULTIPLES OF RATING PLUG AMPERES (In )
5000
.6 .7 .8 .9 1
4000
.5
3000
.001
2000
.002
Figure 12. Series C Type KDC Circuit Breakers Equipped with Type KES Digitrip RMS 310 Trip Units, Types KES3125LS, KES3125LSG
14
eaton www.eaton.com
Application Data AD29167K



Effective April 2013
10,000
.5
CURRENT IN MULTIPLES OF RATING PLUG AMPERES (In )
.6 .7 .8 .9 1
2
3
4
5
6 7 8 9 10
20
2 HOUR S
Circuit Breaker Time/Current Curves (Phase Current) Series C® K-Frame Circuit Breakers
Equipped With Type KES Digitrip RMS 310 Trip Units
1 HOUR
5,000
Catalog Types KES3125LSI, KES3125LSIG Digitrip RMS 310 Trip Units for use with Circuit
Breaker Type KDC, 125A. max.
3,000
Adjustable Short Delay Time
Typical Trip Unit Nameplate
Digitrip RMS 310 Rating Plug
2,000
Short Delay
Pickup •x Ir
Cat.
Standard Fixed
Rating Plug
Push to Trip
In
4
3
Engaged
5
2
1,000
6
7
8
Time • ms
200
100
300
TEST
INST
Digitrip RMS 310 Trip Unit
40oC
Remove
Available Rating Plugs
500
300
200
Long Delay Maximum Total
Clearing Time
1 MINUTE
Type
Catalog
Number
125
110
100
90
70
70, 90, 100, 125
Fixed
Fixed
Fixed
Fixed
Fixed
Adjustable
1KES 125T
1KES 110T
1KES 100T
1KES 90T
1KES 70T
A1KES 125T1
Interrupting Ratings – 50/60 Hz
RMS Sym. Amperes (kA)
UL/CSA
Breaker
Long Delay Minimum Total
Clearing Time
100
Ampere
Rating (In)
240V
200
Type
KDC
50
Short Delay
Pickup Range
Amperes
250–1000
220–880
200–800
180–720
140–560
140–1000
480V
100
600V
50
IEC 947-2
Breaker
Type
240V
380V
415V
KDC
200
100
100
30
Notes
Digitrip RMS 310 trip units are suitable for functional field testing with test kit Cat. No.
STK2. For field testing using primary injection methods, follow NEMA publication
AB-4-1991.
2X
20
There is a memory effect that can act to shorten the long delay. The memory effect
comes into play if a current above the long delay pickup value exists for a time and
then is cleared by the tripping of a downstream device or the circuit breaker itself.
A subsequent overload will cause the circuit breaker to trip in shorter time than normal.
The amount of time delay reduction is inverse to the amount of time that has elapsed
since the previous overload. Approximately five minutes is required between overloads
to completely reset the memory.
.
4X
10
Short Delay
Pickup
Settings
(Tolerance
±10%)
6X
5
3
derating for ambient above 40ºC, refer to Eaton.
For high fault current levels, a fixed instantaneous override is provided at 4000A
(Tolerance ±15%).
The end of the curve is determined by the interrupting rating of the circuit breaker.
See above tabulation.
8X
2
For ground fault time/current curve, see SC-5652-93.
7X
TIME IN SECONDS
Curve accuracy applies from –20ºC to +55ºC ambient. For possible continuous ampere
1
1
5X
3X
.5
300 ms
.3
200 ms
.2
100 ms
.1
.1
I
.05
.05
Fixed Instantaneous
Override .04
.03
.02
.02
SECONDS
.03
.01
Interrupting
Rating
Determines
End of
Curve Maximum
Interrupting
Time
600 Vac
.01
480 Vac
240 Vac
.005
.003
.002
200,000
CURRENT IN AMPS
100,000
.001
50,000
20
40,000
6 7 8 9 10
30,000
5
20,000
4
10,000
3
5000
2
CURRENT IN MULTIPLES OF RATING PLUG AMPERES (In )
4000
.6 .7 .8 .9 1
3000
.5
2000
.001
Figure 13. Series C Type KDC Circuit Breakers Equipped with Type KES Digitrip RMS 310 Trip Units, Types KES3125LSI, KES3125LSIG
eaton www.eaton.com
15
Application Data AD29167K



Effective April 2013
500
175
200
225
250
150
125
100
75
50
25
GROUND CURRENT-AMPERES
10,000
2 HOURS
Circuit Breaker Trip/Current Curves (Ground Current)
1 HOUR
5,000
Type Digitrip RMS 310 Trip Unit for use with Circuit Breaker Types KD, HKD, KDC, CKD,
and CHKD
For use with Trip Unit Catalog Numbers
KES3125LSG
KES3125LSIG
3,000
2,000
Digitrip RMS 310 Rating Plug
Cat.
Push to Trip
In
1,000
Digitrip RMS 310 Rating Plug
300
Push to Trip
Engaged
200
Remove
Ground Fault
Pickup • x Ir
6
7
3
2
5
5
6
7
8
Time • ms
300
150
500
TEST
INST
Ig = 25A
Short Delay
Pickup • x Ir
4
3
2
4
8
Digitrip RMS 310 Trip Unit
40oC
Cat.
In
5
2
Remove
500
Short Delay
Pickup • x Ir
4
3
Engaged
Ground Fault
Time • ms
200
100
300
Pickup • x Ir
3
2
INST
Digitrip RMS 310 Trip Unit
40oC
4
5
Time • ms
300
150
INST
500
TEST
Ig = 25A
Notes
Curve accuracy applies from –20ºC to +55ºC ambient. For possible continuous
ampere derating for ambient above 40ºC, refer to Eaton.
100
1 MINUTE
Series C® K-Frame Circuit Breakers
Equipped With Type KES Digitrip RMS 310 Units
For Ground Fault Protection
Digitrip RMS 310 trip units are suitable for functional field testing with test kit
Cat. No. STK2. For field testing using primary injection methods, follow NEMA
publication AB-4-1991.
50
For phase time/current curves, see SC-5642-93, SC-5643-93, SC-5648-93, or
SC-5649-93.
30
20
4xIG
3xIG
10
5
3
Ground Fault
Pickup Settings
(Tolerance ±10%
Except ±30% on
2xIG Setting)
5xIG
2xIG
TIME IN SECONDS
2
1
500 ms
.5
300 ms
150 ms
.3
.2
.1
I
.05
.03
.02
.01
.005
.003
.002
.001
1
2
3
4
5
6
7 8 9 10
GROUND CURRENT-IN MULTIPLES OF Ig = 25A
100
Figure 14. Series C Type KDC Circuit Breakers Equipped with Type KES Digitrip RMS 310 Trip Units, Ground Fault Protection
(KES3125LSG, KES3125LSIG)
16
eaton www.eaton.com
Application Data AD29167K



Effective April 2013
— OBSOLETE —
.5
CURRENT IN MULTIPLES OF RATING PLUG AMPERES (In )
.6 .7 .8 .9 1
2
3
4
5
6 7 8 9 10
20
Circuit Breaker Time/Current Curves (Phase Current) 2 HOUR S
10,000
Series C ® K-Frame Circuit Breakers
Equipped With Type KES Digitrip RMS 310 Trip Units
1 HOUR
5,000
Catalog Types KES3400LS, KES3400LSG Digitrip RMS 310 Trip Units for use with Circuit
Breaker Types KD, HKD, CKD, and CHKD, 400A. max.
3,000
Fixed Short Delay Time
Typical Trip Unit Nameplate
Digitrip RMS 310 Rating Plug
2,000
Short Delay
Pickup •x Ir
Cat.
Standard Fixed
Rating Plug
Push to Trip
In
4
3
Engaged
5
2
1,000
6
7
TEST
8
Digitrip RMS 310 Trip Unit
40oC
Remove
Available Rating Plugs
500
300
200
Long Delay Maximum Total
Clearing Time
Catalog
Number
400
350
300
250
225
200
200, 250, 300, 400
250, 300, 350, 400
Fixed
Fixed
Fixed
Fixed
Fixed
Fixed
Adjustable
Adjustable
4KES 400T
4KES 350T
4KES 300T
4KES 250T
4KES 225T
4KES 200T
A4KES 400T1
A4KES 400T3
Short Delay
Pickup Range
Amperes
800–3200
700–2800
600–2400
500–2000
450–1800
400–1600
400–3200
500–3200
480V
35
65
600V
25
35
IEC 947-2
240V
380V
415V
KD, CKD
HKD, CHKD
65
100
40
65
40
65
20
Notes
Digitrip RMS 310 trip units are suitable for functional field testing with test kit Cat. No.
STK2. For field testing using primary injection methods, follow NEMA publication
4-1991.
3X
Breaker
Type
30
2X
1 MINUTE
50
There is a memory effect that can act to shorten the long delay. The memory effect
comes into play if a current above the long delay pickup value exists for a time and
then is cleared by the tripping of a downstream device or the circuit breaker itself.
A subsequent overload will cause the circuit breaker to trip in shorter time than normal.
The amount of time delay reduction is inverse to the amount of time that has elapsed
since the previous overload. Approximately five minutes is required between overloads
to completely reset the memory.
10
Short Delay
Pickup
Settings
(Tolerance
±10% )
4X
5
3
Curve accuracy applies from –20ºC to +55ºC ambient. For possible continuous ampere
derating for ambient above 40ºC, refer to Eaton.
For high fault current levels, a fixed instantaneous override is provided at 4000A
(Tolerance ±15%).
8X
5X
2
The end of the curve is determined by the interrupting rating of the circuit breaker.
See above tabulation.
For ground fault time/current curve, see SC-5650-93.
1
6X
TIME IN SECONDS
Type
Interrupting Ratings – 50/60 Hz
RMS Sym. Amperes (kA)
UL/CSA
Breaker
240V
Type
KD, CKD
65
HKD, CHKD
100
Long Delay Minimum Total
Clearing ime
T
100
Ampere
Rating (In )
.5
7X
.3
.2
.1
.1
.05
.05
Fixed Instantaneous
Override .04
.03
.02
.02
SECONDS
.03
.01
Interrupting
Rating
Determines
End of
Curve .01
.005
.003
.002
100,000
CURRENT IN AMPS
50,000
.001
40,000
20
30,000
6 7 8 9 10
20,000
5
10,000
4
5000
3
4000
2
CURRENT IN MULTIPLES OF RATING PLUG AMPERES (In )
3000
.6 .7 .8 .9 1
2000
.5
1000
.001
Figure 15. Series C Types KD, CKD, HKD, CHKD Circuit Breakers Equipped with Type KES Digitrip RMS 310 Trip Units,
Types KES3400LS, KES3400LSG
eaton www.eaton.com
17
Application Data AD29167K



Effective April 2013
— OBSOLETE —
10,000
.5
CURRENT IN MULTIPLES OF RATING PLUG AMPERES (In )
.6 .7 .8 .9 1
2
3
4
6 7 8 9 10
5
20
2 HOUR S
Circuit Breaker Time/Current Curves (Phase Current) Series C ® K-Frame Circuit Breakers
Equipped With Type KES Digitrip RMS 310 Trip Units
1 HOUR
5,000
Catalog Types KES3400LSI, KES3400LSIG Digitrip RMS 310 Units for use with Circuit
Breaker Types KD, HKD, CKD, and CHKD, 400A. max.
3,000
Adjustable Short Delay Time
Typical Trip Unit Nameplate
Digitrip RMS 310 Rating Plug
2,000
Short Delay
Pickup •x Ir
Cat.
Standard Fixed
Rating Plug
Push to Trip
In
4
3
Engaged
1,000
300
200
Long Delay Maximum Total
Clearing Total
50
200
100
INST
300
TEST
RMS 310 Trip Unit
Available Rating Plugs
Ampere
Rating (I n)
Type
Catalog
Number
400
350
300
250
225
200
200, 250, 300, 400
250, 300, 350, 400
Fixed
Fixed
Fixed
Fixed
Fixed
Fixed
Adjustable
Adjustable
4KES 400T
4KES 350T
4KES 300T
4KES 250T
4KES 225T
4KES 200T
A4KES 400T1
A4KES 400T3
Short Delay
Pickup Range
Amperes
800–3200
700–2800
600–2400
500–2000
450–1800
400–1600
400–3200
500–3200
480V
600V
35
65
25
35
IEC 947-2
Breaker
Type
240V
380V
415V
30
KD, CKD
HKD, CHKD
65
100
40
65
40
65
20
Notes
Digitrip RMS 310 trip units are suitable for functional field testing with test kit Cat. No.
STK2. For field testing using primary injection methods, follow NEMA publication
AB-4-1991.
2X
1 MINUTE
6
7
8
Interrupting Ratings – 50/60 Hz
RMS Sym. Amperes (kA)
UL/CSA
Breaker
240V
Type
KD, CKD
65
HKD, CHKD
100
Long Delay Minimum Total
Clearing Time
100
There is a memory effect that can act to shorten the long delay. The memory effect
comes into play if a current above the long delay pickup value exists for a time and
then is cleared by the tripping of a downstream device or the circuit breaker itself.
A subsequent overload will cause the circuit breaker to trip in shorter time than normal.
The amount of time delay reduction is inverse to the amount of time that has elapsed
since the previous overload. Approximately five minutes is required between overloads
to completely reset the memory.
4X
10
Short Delay
Pickup
Settings
(Tolerance
±10%)
6X
5
3
Curve accuracy applies from –20ºC to +55ºC ambient. For possible continuous ampere
derating for ambient above 40ºC, refer to Eaton.
For high fault current levels, a fixed instantaneous override is provided at 4000A
(Tolerance ±15%).
The end of the curve is determined by the interrupting rating of the circuit breaker.
8X
2
See above tabulation.
For ground fault time/current curve, see SC-5650-93.
7X
TIME IN SECONDS
Digitrip
40oC
Remove
500
5
2
Time • ms
1
1
.5
5X
3X
.5
.4
300 ms
.3
.3
200 ms
.2
.2
100 ms
.1
.1
I
.05
.05
Fixed Instantaneous
Override .04
.03
.02
.02
SECONDS
.03
.01
Interrupting
Rating
Determines
End of
Curve .01
.005
.003
.002
100,000
CURRENT IN AMPS
50,000
.001
40,000
20
30,000
6 7 8 9 10
20,000
5
10,000
4
5000
3
4000
2
CURRENT IN MULTIPLES OF RATING PLUG AMPERES (In )
3000
.6 .7 .8 .9 1
2000
.5
1000
.001
Figure 16. Series C Types KD, CKD, HKD, CHKD Circuit Breakers Equipped with Type KES Digitrip RMS 310 Trip Units,
Types KES3400LSI, KES3400LSIG
18
eaton www.eaton.com
Application Data AD29167K



Effective April 2013
— OBSOLETE —
.5
CURRENT IN MULTIPLES OF RATING PLUG AMPERES (In )
.6 .7 .8 .9 1
2
3
4
5
6 7 8 9 10
20
Circuit Breaker Time/Current Curves (Phase Current) 2 HOUR S
10,000
Series C ® K-Frame Circuit Breakers
Equipped With Type KES Digitrip RMS 310 Trip Units
1 HOUR
5,000
Catalog Types KES3250LS, KES3250LSG Digitrip RMS 310 Units for use with Circuit
Breaker Types KD, HKD, CKD, and CHKD, 250A. max.
3,000
Fixed Short Delay Time
Typical Trip Unit Nameplate
Digitrip RMS 310 Rating Plug
2,000
Short Delay
Pickup •x Ir
Cat.
Standard Fixed
Rating Plug
Push to Trip
In
4
3
2
Engaged
1,000
5
6
7
TEST
8
Digitrip RMS 310 Trip Unit
40oC
Remove
Available Rating Plugs
500
300
200
Long Delay Maximum Total
Clearing Time
1 MINUTE
50
Catalog
Number
250
225
200
175
150
125
125, 150, 200, 250
Fixed
Fixed
Fixed
Fixed
Fixed
Fixed
Adjustabl
e
2KES 250T
2KES 225T
2KES 200T
2KES 175T
2KES 150T
2KES 125T
A2KES 250T1
10
600V
25
35
240V
380V
415V
65
100
40
65
40
65
3
Curve accuracy applies from –20ºC to +55ºC ambient. For possible continuous ampere
derating for ambient above 40ºC, refer to Eaton.
For high fault current levels, a fixed instantaneous override is provided at 4000A
5X
(Tolerance ±15%).
8X
2
There is a memory effect that can act to shorten the long delay. The memory effect
comes into play if a current above the long delay pickup value exists for a time and
then is cleared by the tripping of a downstream device or the circuit breaker itself.
A subsequent overload will cause the circuit breaker to trip in shorter time than normal.
The amount of time delay reduction is inverse to the amount of time that has elapsed
since the previous overload. Approximately five minutes is required between overloads
to completely reset the memory.
Short Delay
Pickup
Settings
(Tolerance
±10% )
4X
5
480V
35
65
Notes
Digitrip RMS 310 trip units are suitable for functional field testing with test kit Cat. No.
STK2. For field testing using primary injection methods, follow NEMA publication
AB-4-1991.
3X
2X
20
Short Delay
Pickup Range
Amperes
500–2000
450–1800
400–1600
350–1400
300–1200
250–1000
250–2000
IEC 947-2
Breaker
Type
KD, CKD
HKD, CHKD
30
The end of the curve is determined by the interrupting rating of the circuit breaker.
See above tabulation.
For ground fault time/current curve, see SC-5651-93.
1
6X
TIME IN SECONDS
Type
Interrupting Ratings – 50/60 Hz
RMS Sym. Amperes (kA)
UL/CSA
Breaker
240V
Type
KD, CKD
65
HKD, CHKD
100
Long Delay Minimum Total
Clearing Time
100
Ampere
Rating (In)
.5
7X
.3
.2
.1
.1
.05
.05
Fixed Instantaneous
Override .04
.03
.02
.02
SECONDS
.03
.01
Interrupting
Rating
Determines
End of
Curve .01
.005
.003
.002
100,000
CURRENT IN AMPS
50,000
.001
40,000
20
30,000
6 7 8 9 10
20,000
5
10,000
4
5000
3
4000
2
CURRENT IN MULTIPLES OF RATING PLUG AMPERES (In )
3000
.6 .7 .8 .9 1
2000
.5
1000
.001
Figure 17. Series C Types KD, CKD, HKD, CHKD Circuit Breakers Equipped with Type KES Digitrip RMS 310 Trip Units,
Types KES3250LS, KES3250LSG
eaton www.eaton.com
19
Application Data AD29167K



Effective April 2013
— OBSOLETE —
10,000
.5
CURRENT IN MULTIPLES OF RATING PLUG AMPERES (In )
.6 .7 .8 .9 1
2
3
4
5
6 7 8 9 10
20
2 HOUR S
Circuit Breaker Time/Current Curves (Phase Current) Series C® K-Frame Circuit Breakers
Equipped With Type KES Digitrip RMS 310 Trip Units
1 HOUR
5,000
Catalog Types KES3250LSI, KES3250LSIG Digitrip RMS 310 Units for use with Circuit
Breaker Types KD, HKD, CKD, and CHKD, 250A. max.
3,000
Adjustable Short Delay Time
Typical Trip Unit Nameplate
Digitrip RMS 310 Rating Plug
2,000
Short Delay
Pickup •x Ir
Cat.
Standard Fixed
Rating Plug
Push to Trip
In
4
3
Engaged
5
2
1,000
Time • ms
6
7
200
100
8
INST
300
TEST
Digitrip RMS 310 Trip Unit
40oC
Remove
Available Rating Plugs
500
300
200
Long Delay Maximum Total
Clearing Time
1 MINUTE
50
Catalog
Number
250
225
200
175
150
125
125, 150, 200, 250
Fixed
Fixed
Fixed
Fixed
Fixed
Fixed
Adjustable
2KES 250T
2KES 225T
2KES 200T
2KES 175T
2KES 150T
2KES 125T
A2KES 250T1
Short Delay
Pickup Range
Amperes
500–2000
450–1800
400–1600
350–1400
300–1200
250–1000
250–2000
480V
35
65
600V
25
35
IEC 947-2
Breaker
Type
KD, CKD
HKD, CHKD
30
240V
380V
415V
65
100
40
65
40
65
Notes
Digitrip RMS 310 trip units are suitable for functional field testing with test kit Cat. No.
STK2. For field testing using primary injection methods, follow NEMA publication
AB-4-1991.
2X
20
There is a memory effect that can act to shorten the long delay. The memory effect
comes into play if a current above the long delay pickup value exists for a time and
then is cleared by the tripping of a downstream device or the circuit breaker itself.
A subsequent overload will cause the circuit breaker to trip in shorter time than normal.
The amount of time delay reduction is inverse to the amount of time that has elapsed
since the previous overload. Approximately five minutes is required between overloads
to completely reset the memory.
.
4X
10
Short Delay
Pickup
Settings
(Tolerance
±10%)
6X
5
3
Curve accuracy applies from –20ºC to +55ºC ambient. For possible continuous ampere
derating for ambient above 40ºC , refer to Eaton.
For high fault current levels, a fixed instantaneous override is provided at 4000A
(Tolerance ±15%).
The end of the curve is determined by the interrupting rating of the circuit breaker.
8X
2
See above tabulation.
For ground fault time/current curve, see SC-5651-93.
7X
TIME IN SECONDS
Type
Interrupting Ratings – 50/60 Hz
RMS Sym. Amperes (kA)
UL/CSA
Breaker
240V
Type
KD, CKD
65
HKD, CHKD
100
Long Delay Minimum Total
Clearing Time
100
Ampere
Rating (I
n)
1
1
5X
3X
.5
300 ms
.3
200 ms
.2
100 ms
.1
.1
I
.05
.05
Fixed Instantaneous
Override .04
.03
.02
.02
SECONDS
.03
.01
Interrupting
Rating
Determines
End of
Curve .01
.005
.003
.002
100,000
CURRENT IN AMPS
50,000
.001
40,000
20
20,000
6 7 8 9 10
30,000
5
10,000
4
5000
3
4000
2
CURRENT IN MULTIPLES OF RATING PLUG AMPERES (In )
3000
.6 .7 .8 .9 1
2000
.5
1000
.001
Figure 18. Series C Types KD, CKD, HKD, CHKD Circuit Breakers Equipped with Type KES Digitrip RMS 310 Trip Units,
Types KES3250LSI, KES3250LSIG
20
eaton www.eaton.com
Application Data AD29167K



Effective April 2013
— OBSOLETE —
.5
CURRENT IN MULTIPLES OF RATING PLUG AMPERES (In )
.6 .7 .8 .9 1
2
3
4
5
6 7 8 9 10
20
Circuit Breaker Time/Current Curves (Phase Current) 2 HOUR S
10,000
Series C ® K-Frame Circuit Breakers
Equipped With Type KES Digitrip RMS 310 Trip Units
1 HOUR
5,000
Catalog Types KES3400LS, KES3400LSG Digitrip RMS 310 Trip Units for use with Circuit
Breaker Type KDC, 400A. max.
3,000
Fixed Short Delay Time
Typical Trip Unit Nameplate
Digitrip RMS 310 Rating Plug
2,000
Short Delay
Pickup •x Ir
Cat.
Standard Fixed
Rating Plug
Push to Trip
In
4
3
Engaged
1,000
5
2
6
7
TEST
8
Digitrip RMS 310 Trip Unit
40oC
Remove
Available Rating Plugs
500
300
200
Long Delay Maximum Total
Clearing Time
1 MINUTE
Catalog
Number
400
350
300
250
225
200
200, 250, 300, 400
250, 300, 350, 400
Fixed
Fixed
Fixed
Fixed
Fixed
Fixed
Adjustable
Adjustable
4KES 400T
4KES 350T
4KES 300T
4KES 250T
4KES 225T
4KES 200T
A4KES 400T1
A4KES 400T3
Short Delay
Pickup Range
Amperes
800–3200
700–2800
600–2400
500–2000
450–1800
400–1600
400–3200
500–3200
480V
100
600V
50
50
IEC 947-2
Breaker
Type
KDC
30
3X
2X
380V
415V
200
100
100
There is a memory effect that can act to shorten the long delay. The memory effect
comes into play if a current above the long delay pickup value exists for a time and
then is cleared by the tripping of a downstream device or the circuit breaker itself.
A subsequent overload will cause the circuit breaker to trip in shorter time than normal.
The amount of time delay reduction is inverse to the amount of time that has elapsed
since the previous overload. Approximately five minutes is required between overloads
to completely reset the memory.
.
10
Short Delay
Pickup
Settings
(Tolerance
±10%)
4X
5
240V
Notes
Digitrip RMS 310 trip units are suitable for functional field testing with test kit Cat. No.
STK2. For field testing using primary injection methods, follow NEMA publication
AB-4-1991.
20
2
Curve accuracy applies from –20ºC to +55ºC ambient. For possible continuous ampere
derating for ambient above 40ºC, refer to Eaton.
For high fault current levels, a fixed instantaneous override is provided at 4000A
(Tolerance ±15%).
The end of the curve is determined by the interrupting rating of the circuit breaker.
8X
5X
3
See above tabulation.
For ground fault time/current curve, see SC-5650-93.
1
6X
TIME IN SECONDS
Type
Interrupting Ratings – 50/60 Hz
RMS Sym. Amperes (kA)
UL/CSA
Breaker
240V
Type
KDC
200
Long Delay Minimum Total
Clearing Time
100
Ampere
Rating (In)
.5
7X
.3
.2
.1
.1
.05
.05
Fixed Instantaneous
Override .04
.03
.02
.02
SECONDS
.03
.01
Maximum
Interrupting
Time
600 Vac
.01
480 Vac
240 Vac
.005
.003
Interrupting
Rating
Determines
End of
Curve .002
200,000
CURRENT IN AMPS
100,000
.001
50,000
20
40,000
6 7 8 9 10
30,000
5
20,000
4
10,000
3
5000
2
CURRENT IN MULTIPLES OF RATING PLUG AMPERES (In )
4000
.6 .7 .8 .9 1
3000
.5
2000
.001
Figure 19. Series C Type KDC Circuit Breakers Equipped with Type KES Digitrip RMS 310 Trip Units, Types KES3400LS, KES3400LSG
eaton www.eaton.com
21
Application Data AD29167K



Effective April 2013
— OBSOLETE —
10,000
.5
CURRENT IN MULTIPLES OF RATING PLUG AMPERES (In )
.6 .7 .8 .9 1
2
3
4
5
6 7 8 9 10
20
2 HOUR S
Circuit Breaker Time/Current Curves (Phase Current)
5,000
1 HOUR
Series C ® K-Frame Circuit Breakers
Equipped With Type KES Digitrip RMS 310 Trip Units
Catalog Types KES3400LSI, KES3400LSIG, Digitrip RMS 310 Trip Units for use with
Circuit Breaker Type KDC, 400A. max.
3,000
Adjustable Short Delay Time
Typical Trip Unit Nameplate
Short Delay
Digitrip RMS 310 Rating Plug
2,000
Pickup •x Ir
Cat.
Standard Fixed
Rating Plug
Push to Trip
In
4
3
2
Engaged
1,000
5
6
7
8
Time • ms
200
100
INST
300
TEST
Digitrip RMS 310 Trip Unit
40oC
Remove
Available Rating Plugs
500
300
200
Long Delay Maximum Total
Clearing Time
1 MINUTE
Catalog
Number
Short Delay
Pickup Range
Amperes
400
350
300
250
225
200
200, 250, 300, 400
250, 300, 350, 400
Fixed
Fixed
Fixed
Fixed
Fixed
Fixed
Adjustable
Adjustable
4KES 400T
4KES 350T
4KES 300T
4KES 250T
4KES 225T
4KES 200T
A4KES 400T1
A4KES 400T3
800–3200
700–2800
600–2400
500–2000
450–1800
400–1600
400–3200
500–3200
Type
KDC
50
240V
480V
600V
200
100
50
IEC 947-2
Breaker
Type
KDC
30
240V
380V
415V
200
100
100
Notes
Digitrip RMS 310 trip units are suitable for functional field testing with test kit Cat. No.
STK2. For field testing using primary injection methods, follow NEMA publication
AB-4-1991.
2X
20
There is a memory effect that can act to shorten the long delay. The memory effect
comes into play if a current above the long delay pickup value exists for a time and
then is cleared by the tripping of a downstream device or the circuit breaker itself.
A subsequent overload will cause the circuit breaker to trip in shorter time than normal.
The amount of time delay reduction is inverse to the amount of time that has elapsed
since the previous overload. Approximately five minutes is required between overloads
to completely reset the memory.
.
4X
10
Short Delay
Pickup
Settings
(Tolerance
±10%)
6X
5
3
Curve accuracy applies from –20ºC to +55ºC ambient. For possible continuous ampere
derating for ambient above 40ºC, refer to Eaton.
For high fault current levels, a fixed instantaneous override is provided at 4000A
(Tolerance ±15%).
The end of the curve is determined by the interrupting rating of the circuit breaker.
8X
2
See above tabulation.
For ground fault time/current curve, see SC-5650-93.
7X
TIME IN SECONDS
Type
Interrupting Ratings – 50/60 Hz
RMS Sym. Amperes (kA)
UL/CSA
Breaker
Long Delay Minimum Total
Clearing Time
100
Ampere
Rating (In)
1
1
5X
3X
.5
300 ms
.3
200 ms
.2
100 ms
.1
.1
I
.05
.05
Fixed Instantaneous
Override .04
.03
.02
.02
SECONDS
.03
.01
Interrupting
Rating
Determines
End of
Curve Maximum
Interrupting
Time
me
600 Vac
.01
480 Vac
240 Vac
.005
.003
.002
200,000
CURRENT IN AMPS
100,000
.001
50,000
20
40,000
6 7 8 9 10
20,000
5
30,000
4
10,000
3
5000
2
CURRENT IN MULTIPLES OF RATING PLUG AMPERES (In )
4000
.6 .7 .8 .9 1
3000
.5
2000
.001
Figure 20. Series C Type KDC Circuit Breakers Equipped with Type KES Digitrip RMS 310 Trip Units, Types KES3400LSI, KES3400LSIG
22
eaton www.eaton.com
Application Data AD29167K



Effective April 2013
— OBSOLETE —
10,000
.5
CURRENT IN MULTIPLES OF RATING PLUG AMPERES (In )
.6 .7 .8 .9 1
2
3
4
5
6 7 8 9 10
20
2 HOUR S
Circuit Breaker Time/Current Curves (Phase Current)
5,000
1 HOUR
Series C® K-Frame Circuit Breakers
Equipped With Type KES Digitrip RMS 310 Trip Units
Catalog Types KES3250LS, KES3250LSG Digitrip RMS 310 Units for use with Circuit
Breaker Type KDC, 250A. max.
3,000
Fixed Short Delay Time
Typical Trip Unit Nameplate
Digitrip RMS 310 Rating Plug
2,000
Short Delay
Pickup •x Ir
Cat.
Standard Fixed
Rating Plug
Push to Trip
In
4
3
Engaged
5
2
1,000
6
7
TEST
8
Digitrip RMS 310 Trip Unit
40oC
Remove
Available Rating Plugs
500
300
200
Long Delay Maximum Total
Clearing Time
1 MINUTE
Catalog
Number
250
225
200
175
150
125
125, 150, 200, 250
Fixed
Fixed
Fixed
Fixed
Fixed
Fixed
Adjustable
2KES 250T
2KES 225T
2KES 200T
2KES 175T
2KES 150T
2KES 125T
A2KES 250T1
Short Delay
Pickup Range
Amperes
500–2000
450–1800
400–1600
350–1400
300–1200
250–1000
250–2000
480V
600V
100
50
50
IEC 947-2
Breaker
Type
KDC
30
3X
2X
380V
415V
200
100
100
There is a memory effect that can act to shorten the long delay. The memory effect
comes into play if a current above the long delay pickup value exists for a time and then
then is cleared by the tripping of a downstream device or the circuit breaker itself.
A subsequent overload will cause the circuit breaker to trip in shorter time than normal.
The amount of time delay reduction is inverse to the amount of time that has elapsed
since the previous overload. Approximately five minutes is required between overloads
to completely reset the memory.
.
10
Short Delay
Pickup
Settings
(Tolerance
±10%)
4X
5
240V
Notes
Digitrip RMS 310 trip units are suitable for functional field testing with test kit Cat. No.
STK2. For field testing using primary injection methods, follow NEMA publication
AB-4-1991.
20
3
Curve accuracy applies from –20ºC to +55ºC ambient. For possible continuous ampere
derating for ambient above 40ºC, refer to Eaton.
For high fault current levels, a fixed instantaneous override is provided at 4000A
(Tolerance ±15%).
8X
5X
2
The end of the curve is determined by the interrupting rating of the circuit breaker.
See above tabulation.
For ground fault time/current curve, see SC-5651-93.
1
6X
TIME IN SECONDS
Type
Interrupting Ratings – 50/60 Hz
RMS Sym. Amperes (kA)
UL/CSA
Breaker
240V
Type
KDC
200
Long Delay Minimum Total
Clearing Time
100
Ampere
Rating (In)
.5
7X
.3
.2
.1
.1
.05
.05
Fixed Instantaneous
Override .04
.03
.02
SECONDS
.03
.02
.01
Interrupting
Rating
Determines
End of
Curve 600 Vac
.01
480 Vac
240 Vac
.005
.003
CURRENT IN AMPS
200,000
.001
100,000
20
50,000
6 7 8 9 10
40,000
5
30,000
4
20,000
3
10,000
2
CURRENT IN MULTIPLES OF RATING PLUG AMPERES (In )
5000
.6 .7 .8 .9 1
4000
.5
3000
.001
2000
.002
Figure 21. Series C Type KDC Circuit Breakers Equipped with Type KES Digitrip RMS 310 Trip Units, Types KES3250LS, KES3250LSG
eaton www.eaton.com
23
Application Data AD29167K



Effective April 2013
— OBSOLETE —
10,000
.5
CURRENT IN MULTIPLES OF RATING PLUG AMPERES (In )
.6 .7 .8 .9 1
2
3
4
5
6 7 8 9 10
20
2 HOUR S
Circuit Breaker Time/Current Curves (Phase Current)
Series C K-Frame Circuit Breakers
Equipped With Type KES Digitrip RMS 310 Units
5,000
1 HOUR
®
Catalog Types KES3250LSI, KES3250LSIG Digitrip RMS 310 Trip Units for use with
Circuit Breaker Type KDC, 250A. max.
3,000
Adjustable Short Delay Time
Typical Trip Unit Nameplate
Short Delay
Digitrip RMS 310 Rating Plug
2,000
Pickup •x Ir
Cat.
Standard Fixed
Rating Plug
Push to Trip
In
4
3
Engaged
5
2
1,000
Time • ms
6
7
200
100
8
INST
300
TEST
Digitrip RMS 310 Trip Unit
40oC
Remove
Available Rating Plugs
500
300
200
Long Delay Maximum Total
Clearing Time
1 MINUTE
50
30
Catalog
Number
250
225
200
175
150
125
125, 150, 200, 250
Fixed
Fixed
Fixed
Fixed
Fixed
Fixed
Adjustable
2KES 250T
2KES 225T
2KES 200T
2KES 175T
2KES 150T
2KES 125T
A2KES 250T1
Short Delay
Pickup Range
Amperes
500–2000
450–1800
400–1600
350–1400
300–1200
250–1000
250–2000
480V
100
600V
50
IEC 947-2
Breaker
Type
240V
380V
415V
KDC
200
100
100
Notes
Digitrip RMS 310 trip units are suitable for functional field testing with test kit Cat. No.
STK2. For field testing using primary injection methods, follow NEMA publication
AB-4-1991.
2X
20
There is a memory effect that can act to shorten the long delay. The memory effect
comes into play if a current above the long delay pickup value exists for a time and
then is cleared by the tripping of a downstream device or the circuit breaker itself.
A subsequent overload will cause the circuit breaker to trip in shorter time than normal.
The amount of time delay reduction is inverse to the amount of time that has elapsed
since the previous overload. Approximately five minutes is required between overloads
to completely reset the memory.
.
4X
10
Short Delay
Pickup
Settings
(Tolerance
±10%)
6X
5
3
Curve accuracy applies from –20ºC to +55ºC ambient. For possible continuous ampere
derating for ambient above 40ºC, refer to Eaton.
For high fault current levels, a fixed instantaneous override is provided at 4000A
(Tolerance ±15%).
The end of the curve is determined by the interrupting rating of the circuit breaker.
8X
2
See above tabulation.
For ground fault time/current curve, see SC-5651-93.
7X
TIME IN SECONDS
Type
Interrupting Ratings – 50/60 Hz
RMS Sym. Amperes (kA)
UL/CSA
Breaker
240V
Type
KDC
200
Long Delay Minimum Total
Clearing Time
100
Ampere
Rating (In)
1
1
5X
3X
.5
300 ms
.3
200 ms
.2
100 ms
.1
.1
I
.05
.05
Fixed Instantaneous
Override .04
.03
.02
.02
SECONDS
.03
.01
Interrupting
Rating
Determines
End of
Curve Maximum
Interrupting
Time
600 Vac
.01
480 Vac
240 Vac
.005
.003
200,000
.001
100,000
20
50,000
6 7 8 9 10
40,000
5
30,000
4
20,000
3
10,000
2
CURRENT IN MULTIPLES OF RATING PLUG AMPERES (In )
5000
.6 .7 .8 .9 1
4000
.5
3000
.001
2000
.002
CURRENT IN AMPS
Figure 22. Series C Type KDC Circuit Breakers Equipped with Type KES Digitrip RMS 310 Trip Units, Types KES3250LSI, KES3250LSIG
24
eaton www.eaton.com
Application Data AD29167K



Effective April 2013
560
640
720
800
480
400
320
240
80
160
GROUND CURRENT-AMPERES
10,000
8000
— OBSOLETE —
2 HOUR S
Circuit Breaker Trip/Current Curves (Ground Current)
5,000
1 HOUR
Series C® K-Frame Circuit Breakers
Equipped With Type KES Digitrip RMS 310 Trip Units
For Ground Fault Protection
Type Digitrip RMS 310 Trip Unit for use with Circuit Breaker Types KD, HKD, KDC, CKD,
and CHKD
For use with Trip Unit Catalog Numbers
KES3400LSG
KES3400LSIG
3,000
2,000
Digitrip RMS 310 Rating Plug
Cat.
Push to Trip
In
1,000
4
3
Engaged
Cat.
300
Push to Trip
Engaged
200
Remove
Ground Fault
Pickup •x Ig
6
7
3
2
8
4
3
5
2
Digitrip
40oC
5
200
100
8
INST
500
TEST
INST
Ground Fault
Time • ms
6
7
Time • ms
300
150
Ig = 80A
Short Delay
Pickup •x Ir
4
1
Digitrip RMS 310 Trip Unit
40oC
Digitrip RMS 310 Rating Plug
In
5
2
Remove
500
Short Delay
Pickup •x Ir
300
RMS 310 Trip Unit
Pickup •x Ig
3
2
1
4
5
Time • ms
300
150
INST
500
TEST
Ig = 80A
Notes
Curve accuracy applies from –20ºC to +55ºC ambient. For possible continuous
ampere derating for ambient above 40ºC, refer to Eaton.
1 MINUTE
100
Digitrip RMS 310 trip units are suitable for functional field testing with test kit
Cat. No. STK2. For field testing using primary injection methods, follow NEMA
publication AB-4-1991.
For phase time/current curves, see SC-5638-93, SC-5639-93, SC-5644-93, or
50
SC-5645-93.
30
1xIG
20
4xIG
3xIG
10
5
3
2xIG
Ground Fault
Pickup Settings
(Tolerance ±10%
Except ±20% on
1xI G Setting)
5xIG
TIME IN SECONDS
2
1
500 ms
.5
300 ms
.3
.2
150 ms
.1
I
.05
.03
.02
.01
.005
.003
.002
.001
1
2
3
4
5
6
7 8 9 10
GROUND CURRENT-IN MULTIPLES OF Ig = 80A
100
Figure 23. Series C Type KDC Circuit Breakers Equipped with Type KES Digitrip RMS 310 Trip Units, Ground Fault Protection
(KES3400LSG, KES3400LSIG)
eaton www.eaton.com
25
Application Data AD29167K



Effective April 2013
350
400
450
500
300
250
200
150
50
100
GROUND CURRENT-AMPERES
10,000
5000
— OBSOLETE —
2 HOUR S
Circuit Breaker Time/Current Curves (Ground Current)
Series C® K-Frame Circuit Breakers
Equipped With Type KES Digitrip RMS 310 Trip Units
For Ground Fault Protection
1 HOUR
5,000
Type Digitrip RMS 310 Trip Unit for use with Circuit Breaker Types KD, HKD, KDC, CKD,
and CHKD
For use with Trip Unit Catalog Numbers
KES3250LSG
KES3250LSIG
3,000
2,000
Digitrip RMS 310 Rating Plug
Cat.
Push to Trip
In
1,000
4
3
2
Engaged
Cat.
Push to rTip
300
Engaged
200
Remove
6
7
8
3
2
1
Pickup •x Ir
4
3
2
5
6
7
8
5
Time • ms
300
150
INST
500
TEST
Ig = 50A
Ground Fault
Time • ms
200
100
4
300
INST
Digitrip RMS 310 Trip Unit
40oC
Pickup •x Ig
3
2
1
4
5
Time • ms
300
150
INST
500
TEST
Ig = 50A
Notes
Curve accuracy applies from –20ºC to +55ºC ambient. For possible continuous
ampere derating for ambient above 40ºC, refer to Eaton.
100
1 MINUTE
Ground Fault
Pickup •x Ig
Short Delay
Digitrip RMS 310 Rating Plug
In
5
Digitrip RMS 310 Trip Unit
40oC
Remove
500
Short Delay
Pickup •x Ir
Digitrip RMS 310 trip units are suitable for functional field testing with test kit
Cat. No. STK2. For field testing using primary injection methods, follow NEMA
publication AB-4-1991.
For phase time/current curves, see SC-5640-93, SC-5641-93, SC-5646-93, or
50
SC-5647-93.
30
1xIG
20
4xIG
3xIG
10
5
3
2xIG
Ground Fault
Pickup Settings
(Tolerance ±10%
Except ±20% on
1xIG Setting)
5xIG
TIME IN SECONDS
2
1
500 ms
.5
300 ms
.3
.2
150 ms
.1
I
.05
.03
.02
.01
.005
.003
.002
.001
1
2
3
4
5
6
7 8 910
GROUND CURRENT-IN MULTIPLES OF Ig = 50A
100
Figure 24. Series C Type KDC Circuit Breakers Equipped with Type KES Digitrip RMS 310 Trip Units, Ground Fault Protection
(KES3250LSG, KES3250LSIG)
26
eaton www.eaton.com



Application Data AD29167K
Effective April 2013
eaton www.eaton.com
27
Application Data AD29167K



Effective April 2013
Eaton
1000 Eaton Boulevard
Cleveland, OH 44114
United States
Eaton.com
© 2013 Eaton
All Rights Reserved
Printed in USA
Publication No. AD29167K / Z13590
April 2013
Eaton is a registered trademark.
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of their respective owners.