Application Data
Cutler-Hammer
Westinghouse &
Cutler-Hammer Products
Five Parkway Center
Pittsburgh, Pennsylvania, U.S.A. 15220
October 2006
Mailed to: E/29-100A
Time/Current Characteristic Curves for
Westinghouse Series C ® N-Frame Circuit
Breakers with Type NES Digitrip RMS 310
Trip Units
29-167N
Page 1
Westinghouse
AB DE-ION®
Circuit Breakers
Breaker Description
Curve No.
Page
Series C Types ND, CND, HND, CHND, NDC, CNDC Circuit Breakers
Equipped With Type NES Digitrip RMS 310 Trip Units With
I 2t Ramp Short Time Delay (Phase Protection) ....................................... SC-5375-92A
Adjustable Short Time Delay (Phase Protection) ................................... SC-5376-92A
Ground Fault Protection➀ .......................................................................... SC-5377-92A
2
3
4
Series C Types ND, HND and NDC Circuit Breakers
Equipped With Digitrip OPTIM Trip Units
Long Delay I2 t, Short Delay I2 t ..................................................................
Long Delay I2 t, Short Delay Flat ...............................................................
Long Delay I4 t, Short Delay Flat ...............................................................
Instantaneous and Override ......................................................................
Ground Fault Protection ............................................................................
5
6
7
8
9
SC-6331-96
SC-6332-96
SC-6333-96
SC-6334-96
SC-6335-96
Individual oversize copies of curves listed above printed on onion-skin paper are available
in limited quantity from:
Cutler-Hammer
Westinghouse &
Cutler-Hammer Products
Five Parkway Center
Pittsburgh, PA 15220
When ordering onion-skin curves, use number at bottom of page where curve appears,
i.e., SC-5375-92A. Requests for full sets of curves will not be honored.
➀ Use in conjunction with SC-5375-92A or SC-5376-92A.
Courtesy of NationalSwitchgear.com
Application Data
29-167N
Page 2
AB DE-ION Circuit Breakers
Types ND, CND, HND, CHND, NDC, CNDC, NDU, NGU Equipped With Type NES Digitrip RMS 310 Trip
Units With I 2t Ramp Short Time Delay (Phase Protection)
CURRENT IN MULTIPLES OF RATING PLUG AMPERES (In)
.5 .6 .7 .8 .9 1
2
3
4 5 6 7 8 9 10
20
1 HOUR
2 HOURS
10,000
Circuit Breaker Time/Current Curves (Phase Current)
Series C® N-Frame Circuit Breakers
Equipped With Type NES Digitrip RMS 310 Trip Units
The NES Digitrip RMS 310 Trip Units are AC only devices that employ microprocessor
based technology that provides true RMS current sensing means for proper correlation
with thermal characteristics of conductors and equipment. They are used with Circuit
Breaker Types ND, CND, HND, CHND, NDC, and CNDC.
5,000
3,000
I2t Ramp Short Time Delay
2,000
Typical Trip Unit Nameplate
Digitrip RMS 310 Rating Plug
Standard Fixed
Rating Plug
Push
to
Trip
Short Delay
Pickup
x In 5
4
6
Cat.–
/n–
“Y”
3
1,000
Engaged
Frame
Rating
Amperes
(Max.)
500
300
800
200
1 MINUTE
100
Long Delay➀
Maximum Total
Clearing Time
Long Delay➀
Minimum Total
Clearing Time
1200
50
30
3X
2X
8
10
TEST
Remove
Available Rating Plugs
Type
Ampere
Rating (In)
Catalog
Number
Short Delay
Pickup Range
Amperes
800
700
630
600
550
500
450
400
400, 500, 600, 800
400, 500, 630, 800
1200
1000
900
800
700
630
600
600, 800, 1000, 1200
8NES800T
8NES700T
8NES630T➃
8NES600T
8NES550T
8NES500T
8NES450T
8NES400T
A8NES800T1
A8NES800T2➃
12NES1200T
12NES1000T
12NES900T➃
12NES800T
12NES700T
12NES630T➃
12NES600T
A12NES1200T1
1600-6400
1400-5600
1260-5040
1200-4800
1100-4400
1000-4000
900-3600
800-3200
800-6400
800-6400
2400-9600
2000-8000
1800-7200
1600-6400
1400-5600
1260-5040
1200-4800
1200-9600
Fixed
Fixed
Fixed
Fixed
Fixed
Fixed
Fixed
Fixed
Adj.
Adj.
Fixed
Fixed
Fixed
Fixed
Fixed
Fixed
Fixed
Adj.
Interrupting Ratings – 50/60 Hz
RMS Sym. Amperes (kA)
UL/CSA
Breaker
Type
240V
480V
65
50
ND, CND
100
65
HND, CHND
200
100
NDC, CNDC
20
Digitrip RMS 310
Trip Unit
40°C Ambient
7
2
IEC 947-2
220-240V
65
100
200
600V
25
35
50
380-415V
50
65
100
ICS = .25 ICU
ICW = 15 kA @ .5S
Uimp = 8kV
Short Delay
Pick Up
Settings
(Tolerance
± 10%)
4X
5
3
1
Curve accuracy applies from -20°C to +55°C ambient. For possible ampere derating for ambient
above 40°C, refer to Cutler-Hammer.
Digitrip RMS 300 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.
8X
5X
For ground fault time-current curves see SC-5377-92A.
➀ 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 pick up 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.
6X
➁ For high fault current levels a fixed instantaneous override is provided at 14000A (Tolerance
±15%).
➂ The end of the curve is determined by the interrupting rating of the circuit breaker. See above
tabulation.
.5
➃ Not UL/CSA Listed.
.3
7X
.2
.1
.05
.05
.03
.03
.02
.02
20
.001
CURRENT IN AMPS
60,000
70,000
80,000
90,000
100,000
.002
50,000
.003
.002
40,000
.003
30,000
.005
20,000
.01
.005
.001
2
3
4 5 6 7 8 9 10
.5 .6 .7 .8 .9 1
CURRENT IN MULTIPLES OF RATING PLUG AMPERES (In)
Interrupting
Rating
Determines
End of Curve➂
10,000
.01
Fixed Instantaneous
Overide➁
200,000
.1
SECONDS
TIME IN SECONDS
2
Notes
Curve No. SC-5375-92A
October 2006
Courtesy of NationalSwitchgear.com
Application Data
29-167N
Page 3
AB DE-ION Circuit Breakers
Types ND, CND, HND, CHND, NDC, CNDC, NDU, NGU Equipped With Type NES Digitrip RMS 310 Trip
Units With Adjustable Short Time Delay (Phase Protection)
CURRENT IN MULTIPLES OF RATING PLUG AMPERES (In)
.5 .6 .7 .8 .9 1
2
3
4 5 6 7 8 9 10
20
1 HOUR
2 HOURS
10,000
Circuit Breaker Time/Current Curves (Phase Current)
Series C® N-Frame Circuit Breakers
Equipped With Type NES Digitrip RMS 310 Trip Units
The NES Digitrip RMS 310 Trip Units are AC only devices that employ microprocessor
based technology that provides true RMS current sensing means for proper correlation
with thermal characteristics of conductors and equipment. They are used with Circuit
Breaker Types ND, CND, HND, CHND, NDC, and CNDC.
5,000
3,000
Adjustable Short Time Delay
Typical Trip Unit Nameplate
Digitrip RMS 310 Rating Plug
2,000
Push
to
Trip
Standard Fixed
Rating Plug
Short Delay
Pickup
x In 5
4
6
Cat.–
/n–
“Y”
3
Engaged
Digitrip RMS 310
Trip Unit
40°C Ambient
7
2
8
TEST
Remove
1,000
Frame
Rating
Amperes
(Max.)
500
800
300
200
1 MINUTE
100
Long Delay➀
Maximum Total
Clearing Time
1200
Long Delay➀
Minimum Total
Clearing Time
50
Available Rating Plugs
Ampere
Type
Rating (I n )
Catalog
Number
Short Delay
Pickup Range
Amperes
800
700
630
600
550
500
450
400
400, 500, 600, 800
400, 500, 630, 800
1200
1000
900
800
700
630
600
600, 800, 1000, 1200
8NES800T
8NES700T
8NES630T➃
8NES600T
8NES550T
8NES500T
8NES450T
8NES400T
A8NES800T1
A8NES800T2➃
12NES1200T
12NES1000T
12NES900T➃
12NES800T
12NES700T
12NES630T➃
12NES600T
A12NES1200T1
1600-6400
1400-5600
1260-5040
1200-4800
1100-4400
1000-4000
900-3600
800-3200
800-6400
800-6400
2400-9600
2000-8000
1800-7200
1600-6400
1400-5600
1260-5040
1200-4800
1200-9600
Fixed
Fixed
Fixed
Fixed
Fixed
Fixed
Fixed
Fixed
Adj.
Adj.
Fixed
Fixed
Fixed
Fixed
Fixed
Fixed
Fixed
Adj.
Interrupting Ratings – 50/60 Hz
RMS Sym. Amperes (kA)
UL/CSA
Breaker
Type
240V
480V
65
50
ND, CND
100
65
HND, CHND
200
100
NDC, CNDC
30
2X
20
IEC 947-2
220-240V
65
100
200
600V
25
35
50
380-415V
50
65
100
ICS = .25 ICU
ICW = 15 kA @ .5S
Uimp = 8kV
10
Notes
4X
Curve accuracy applies from -20°C to +55°C ambient. For possible ampere derating for ambient
above 40°C, refer to Cutler-Hammer.
Short Delay
Pick Up
Settings
(Tolerance
±10%)
6X
5
3
For ground fault time-current curves see SC-5377-92A.
8X
➀ 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 pick up 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.
➁ For high fault current levels a fixed instantaneous override is provided at 14000A (Tolerance
±15%).
7X
TIME IN SECONDS
2
Digitrip RMS 300 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.
1
➂ The end of the curve is determined by the interrupting rating of the circuit breaker. See above
tabulation.
➃ Not UL/CSA Listed.
5X
3X
.5
300 MS
.3
200 MS
.2
100MS
.1
.1
I
.03
.03
.02
.02
20
.001
CURRENT IN AMPS
October 2006
Courtesy of NationalSwitchgear.com
60,000
70,000
80,000
90,000
100,000
.002
50,000
.003
.002
40,000
.003
30,000
.005
20,000
.01
.005
.001
2
3
4 5 6 7 8 9 10
.5 .6 .7 .8 .9 1
CURRENT IN MULTIPLES OF RATING PLUG AMPERES (In)
Interrupting
Rating
Determines
End of Curve➂
10,000
.01
Fixed Instantaneous
Overide➁
200,000
.05
SECONDS
.05
Curve No. SC-5376-92A
Application Data
29-167N
Page 4
AB DE-ION Circuit Breakers
Types ND, CND, HND, CHND, NDC, CNDC, NDU, NGU Equipped With Type NES Digitrip RMS 310 Trip
Units With Ground Fault Protection
5000
4000
3000
2000
600
700
800
900
1000
500
400
300
200
.50
.60
.70
.80
.90
100
CURRENT IN AMPERES
1 HOUR
2 HOURS
10,000
Circuit Breaker Time/Current Curves (Ground Current)
Series C® N-Frame Circuit Breakers
Equipped With Type NES Digitrip RMS 310 Trip Units
The NES Digitrip RMS 310 Trip Units are AC only devices that employ microprocessor
based technology that provides true RMS current sensing means for proper correlation
with thermal characteristics of conductors and equipment. They are used with Circuit
Breaker Types ND, CND, HND, CHND, NDC, and CNDC.
5,000
3,000
Typical Trip Unit Nameplate
2,000
Digitrip RMS 310 Rating Plug
Push
to
Trip
Cat.–
/n–
“Y”
1,000
Short Delay
Pickup
x In 5
4
6
Ground Fault
Pickup
x IG 4
3
5
3
2
7
2
Engaged
Remove
8
6
1
IG=200A
Time
500
300
150
1
Digitrip RMS 310
Trip Unit
40°C Ambient
TEST
Millisec
500
300
200
Notes
Curve accuracy applies from –20°C to +55°C ambient.
Digitrip RMS 300 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-5375-92A and SC-5376-92A.
1 MINUTE
100
50
30
200 A.
600 A.
10
1000 A.
20
5
Ground Fault Pick Up Settings
(Tolerance ±10% Except
±20% on 200 A. Setting)
800 A.
400 A.
2
1200 A.
3
TIME IN SECONDS
1
.5 SEC
.5
.3 SEC
.3
.2
.15 SEC
.1
I
.05
.03
.02
.01
.005
.003
5000
4000
3000
2000
600
700
800
900
1000
400
300
200
.50
.60
.70
.80
.90
100
.001
500
.002
CURRENT IN AMPERES
Curve No. SC-5377-92A
October 2006
Courtesy of NationalSwitchgear.com
Application Data
29-167N
Page 5
AB DE-ION Circuit Breakers
2
N-Frame Circuit Breakers Equipped with Digitrip OPTIM Trip Units; Long Delay I t, Short Delay I2t
1 HOUR
50
60
70
80
90
100
40
30
20
5
6
7
8
9
10
3
2
0.6
0.7
0.8
0.9
1
0.5
2 HOURS
CURRENT IN MULTIPLES OF LONG DELAY SETTING Ir
10,000
Circuit Breaker Time/Current Curves (Phase Current)
Series CT N - Frame Circuit Breakers
Equipped With Digitrip Optim Trip Units
2
2
Response: LONG DELAY I t, SHORT DELAY I t
Available Long Delay
Pickup Settings (I r)
0.4 to 1 x In = Ir
in 0.01 increments
5,000
Available Rating Plugs
Maximum
Ampere
Rating
3,000
2,000
Ampere
Rating
(In)
Rating Plug
Catalog
Number
Long Delay
Pickup Range
0.4 to 1 x In
Amperes
Short Delay
Pickup Range
1.5 to 8 x Ir
Amperes
800
800
700
630
600
550
500
450
400
ORPL80A800
ORPL80A700
ORPL80A630
ORPL80A600
ORPL80A550
ORPL80A500
ORPL80A450
ORPL80A400
320 - 800
280 - 700
252 - 630
240 - 600
220 - 550
200 - 500
180 - 450
160 - 400
480 - 6400
420 - 5600
378 - 5040
360 - 4800
330 - 4400
300 - 4000
270 - 3600
240 - 3200
1200
1200
1000
900
800
700
600
ORPL12A1200
ORPL12A1000
ORPL12A900
ORPL12A800
ORPL12A700
ORPL12A600
480 -1200
400 -1000
360 - 900
320 - 800
280 - 700
240 - 600
1,000
Maximum
Total
Clearing
Time
500
720 - 9600
600 - 8000
540 - 7200
480 - 6400
420 - 5600
360 - 4800
300
200
1 MINUTE
Interrupting Rating @ 50/60 Hz RMS Sym. Amperes (kA)
100
50
Breaker
UL / CSA
Type
Volts
240
480
600
ND
HND
NDC
kA
65
100
200
35
65
100
25
35
50
IEC 947-2
Minimum
Total
Clearing
Time
30
240
Volts
24
Rating
ND
HND
NDC
20
kA
ICS
ICU
ICS
ICU
ICS
85
100
200
85
100
100
50
70
100
50
50
50
20
25
35
10
13
18
UIMP = 8kV
TIME IN SECONDS
10
7
5
4
690
415
ICU
Utilization Category A
Notes
1) For field testing primary injection methods, follow NEMA AB4-1991 publications.
2) Calibration response in short delay pickup range is the same for 1, 2, or 3 poles in series.
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 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 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.
4) The end of the curve is determined by the interrupting rating of the circuit breaker.
See above tabulation.
5) For ground fault time / current curves see SC-6335-96.
6) This curve is shown as a multiple of the Long Delay Pick-up Setting, (Ir). This Ir setting is
programmed in primary value amperes via a Breaker Interface Module, or OPTIMizer,
or a Remote PC (IMPACC System).
7) The Long Delay Pick-up Point (indicated by a flashing LED on the product) nominally occurs
at 116% of the Ir current, with a +/- 5% tolerance. The short delay settings have conventional
100%, +/- 5% as the pickup points.
8) For additional curve tolerances contact Cutler-Hammer.
9) Total clearing times shown include the response times of the trip unit, the breaker opening,
and the extinction of the arcing current.
Available
Long Delay
Time Settings
Shown @ 6 x Ir
2-24 seconds +0 ⁄-30%
in 0.1 second
increments
3
2
2
Available
Short Delay
Pickup Settings
1.5 to 8 x Ir
±5% in 0.1
increments
1
1
.5
.5
.5
.3
.3
.2
.2
Application
Determines
End of Curve
.1
.1
.1
Available I2 t Slope
Short Delay Time Settings
0.1 to 0.5 seconds in
0.01 second increments
.05
.05
CURRENT IN MULTIPLES OF LONG DELAY SETTING I r
October 2006
Courtesy of NationalSwitchgear.com
6000
7000
8000
9000
10,000
5000
3000
4000
2000
500
600
700
800
900
1000
300
400
200
50
60
70
80
90
100
40
30
20
.01
6
7
8
9
10
.01
5
.02
4
.02
3
.03
2
.03
0.5
0.6
0.7
0.8
0.9
1
TIME IN SECONDS
.3
Curve No. SC-6331-96
Application Data
29-167N
Page 6
AB DE-ION Circuit Breakers
N-Frame Circuit Breakers Equipped with Digitrip OPTIM Trip Units; Long Delay I2t, Short Delay Flat
1 HOUR
50
60
70
80
90
100
40
30
20
5
6
7
8
9
10
3
2
0.5
0.6
0.7
0.8
0.9
1
2 HOURS
CURRENT IN MULTIPLES OF LONG DELAY SETTING Ir
10,000
Circuit Breaker Time/Current Curves (Phase Current)
Series CT N - Frame Circuit Breakers
Equipped With Digitrip Optim Trip Units
Response: LONG DELAY I2t, SHORT DELAY FLAT
Available Long Delay
Pickup Settings (I r)
0.4 to 1 x In = Ir
in 0.01 increments
5,000
Available Rating Plugs
3,000
2,000
Maximum
Ampere
Rating
Ampere
Rating
(In)
Rating Plug
Catalog
Number
800
800
700
630
600
550
500
450
400
ORPL80A800
ORPL80A700
ORPL80A630
ORPL80A600
ORPL80A550
ORPL80A500
ORPL80A450
ORPL80A400
320 - 800
280 - 700
252 - 630
240 - 600
220 - 550
200 - 500
180 - 450
160 - 400
1200
1200
1000
900
800
700
600
ORPL12A1200
ORPL12A1000
ORPL12A900
ORPL12A800
ORPL12A700
ORPL12A600
480 -1200
400 -1000
360 - 900
320 - 800
280 - 700
240 - 600
1,000
Maximum
Total
Clearing
Time
500
Short Delay
Pickup Range
1.5 to 8 x Ir
Amperes
Long Delay
Pickup Range
0.4 to 1 x In
Amperes
480 - 6400
420 - 5600
378 - 5040
360 - 4800
330 - 4400
300 - 4000
270 - 3600
240 - 3200
720 - 9600
600 - 8000
540 - 7200
480 - 6400
420 - 5600
360 - 4800
300
200
1 MINUTE
Interrupting Rating @ 50/60 Hz RMS Sym. Amperes (kA)
100
50
Breaker
UL / CSA
Type
Volts
240
480
600
ND
HND
NDC
kA
65
100
200
35
65
100
25
35
50
IEC 947-2
20
24
Rating
ND
HND
NDC
kA
ICS
ICU
ICS
ICU
ICS
85
100
200
85
100
100
50
70
100
50
50
50
20
25
35
10
13
18
UIMP = 8kV
7
5
4
Utilization Category A
Notes
1) For field testing primary injection methods, follow NEMA AB4-1991 publications.
2) Calibration response in short delay pickup range is the same for 1, 2, or 3 poles in series.
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 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 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.
4) The end of the curve is determined by the interrupting rating of the circuit breaker.
See above tabulation.
5) For ground fault time / current curves see SC-6335-96.
6) This curve is shown as a multiple of the Long Delay Pick-up Setting, (Ir). This Ir setting is
programmed in primary value amperes via a Breaker Interface Module, or OPTIMizer,
or a Remote PC (IMPACC System).
7) The Long Delay Pick-up Point (indicated by a flashing LED on the product) nominally occurs
at 116% of the Ir current, with a +/- 5% tolerance. The short delay settings have conventional
100%, +/- 5% as the pickup points.
8) For additional curve tolerances contact Cutler-Hammer.
9) Total clearing times shown include the response times of the trip unit, the breaker opening,
and the extinction of the arcing current.
Available
Long Delay
Time Settings
Shown @ 6 x Ir
2-24 seconds +0 ⁄-30%
in 0.1 second
increments
3
2
2
Available
Short Delay
Pickup Settings
1.5 to 8 x Ir
±5% in 0.1
increments
1
1
.5
.5
.5
.3
.3
.3
.2
.2
Application
Determines
End of Curve
.1
.1
.1
.05
.05
Available Flat
Short Delay Time Settings
0.1 to 0.5 seconds
in 0.01 second increments
.03
.03
CURRENT IN MULTIPLES OF LONG DELAY SETTING Ir
6000
7000
8000
9000
10,000
4000
5000
3000
2000
500
600
700
800
900
1000
300
400
200
50
60
70
80
90
100
40
30
20
5
6
7
8
9
10
.01
4
.01
3
.02
2
.02
0.5
0.6
0.7
0.8
0.9
1
TIME IN SECONDS
10
690
415
ICU
TIME IN SECONDS
30
240
Volts
Minimum
Total
Clearing
Time
Curve No. SC-6332-96
October 2006
Courtesy of NationalSwitchgear.com
Application Data
29-167N
Page 7
AB DE-ION Circuit Breakers
N-Frame Circuit Breakers Equipped with Digitrip OPTIM Trip Units; Long Delay I4t, Short Delay Flat
1 HOUR
50
60
70
80
90
100
40
30
20
5
6
7
8
9
10
3
2
0.5
0.6
0.7
0.8
0.9
1
2 HOURS
CURRENT IN MULTIPLES OF LONG DELAY SETTING Ir
10,000
Circuit Breaker Time/Current Curves (Phase Current)
Series CT N - Frame Circuit Breakers
Equipped With Digitrip Optim Trip Units
Response: LONG DELAY I4t, SHORT DELAY FLAT
Available Long Delay
Pickup Settings (I r)
0.4 to 1 x In = Ir
in 0.01 increments
5,000
Available Rating Plugs
3,000
2,000
Maximum
Total
Clearing
Time
Maximum
Ampere
Rating
Ampere
Rating
(In)
Rating Plug
Catalog
Number
800
800
700
630
600
550
500
450
400
ORPL80A800
ORPL80A700
ORPL80A630
ORPL80A600
ORPL80A550
ORPL80A500
ORPL80A450
ORPL80A400
320 - 800
280 - 700
252 - 630
240 - 600
220 - 550
200 - 500
180 - 450
160 - 400
1200
1200
1000
900
800
700
600
ORPL12A1200
ORPL12A1000
ORPL12A900
ORPL12A800
ORPL12A700
ORPL12A600
480 -1200
400 -1000
360 - 900
320 - 800
280 - 700
240 - 600
1,000
500
Short Delay
Pickup Range
1.5 to 8 x Ir
Amperes
Long Delay
Pickup Range
0.4 to 1 x In
Amperes
480 - 6400
420 - 5600
378 - 5040
360 - 4800
330 - 4400
300 - 4000
270 - 3600
240 - 3200
720 - 9600
600 - 8000
540 - 7200
480 - 6400
420 - 5600
360 - 4800
Minimum
Total
Clearing
Time
300
200
1 MINUTE
Interrupting Rating @ 50/60 Hz RMS Sym. Amperes (kA)
100
50
Breaker
UL / CSA
Type
Volts
240
480
600
ND
HND
NDC
kA
65
100
200
35
65
100
25
35
50
IEC 947-2
240
Volts
690
415
30
Rating
ND
HND
NDC
20
kA
ICU
ICS
ICU
ICS
ICU
ICS
85
100
200
85
100
100
50
70
100
50
50
50
20
25
35
10
13
18
UIMP = 8kV
5
5
2
1
Available
Long Delay
Time Settings
Shown @ 6 x Ir
1-5 seconds +10 ⁄-40%
in 0.1 second
increments
Available
Short Delay
Pickup Settings
1.5 to 8 x Ir
±5% in 0.1
increments
1
1
.5
.5
.5
.3
.3
.2
.2
Application
Determines
End of Curve
.1
.1
.1
.05
TIME IN SECONDS
TIME IN SECONDS
10
3
Utilization Category A
Notes
1) For field testing primary injection methods, follow NEMA AB4-1991 publications.
2) Calibration response in short delay pickup range is the same for 1, 2, or 3 poles in series.
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 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 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.
4) The end of the curve is determined by the interrupting rating of the circuit breaker.
See above tabulation.
5) For ground fault time / current curves see SC-6335-96.
6) This curve is shown as a multiple of the Long Delay Pick-up Setting, (Ir). This Ir setting is
programmed in primary value amperes via a Breaker Interface Module, or OPTIMizer,
or a Remote PC (IMPACC System).
7) The Long Delay Pick-up Point (indicated by a flashing LED on the product) nominally occurs
at 116% of the Ir current, with a +/- 5% tolerance. The short delay settings have conventional
100%, +/- 5% as the pickup points.
8) For additional curve tolerances contact Cutler-Hammer.
9) Total clearing times shown include the response times of the trip unit, the breaker opening,
and the extinction of the arcing current.
.05
Available Flat
Short Delay Time Settings
0.1 to 0.5 seconds
in 0.01 second increments
.03
.03
CURRENT IN MULTIPLES OF LONG DELAY SETTING I r
October 2006
Courtesy of NationalSwitchgear.com
6000
7000
8000
9000
10,000
4000
5000
3000
2000
500
600
700
800
900
1000
300
400
200
50
60
70
80
90
100
40
30
20
5
6
7
8
9
10
4
.01
3
.01
2
.02
0.5
0.6
0.7
0.8
0.9
1
.02
Curve No. SC-6333-96
Application Data
29-167N
Page 8
AB DE-ION Circuit Breakers
N-Frame Circuit Breakers Equipped with Digitrip OPTIM Trip Units; Instantaneous and Override
10,000
50
60
70
80
90
100
40
30
20
5
6
7
8
9
10
4
3
2
1
2 HOURS
CURRENT IN MULTIPLES OF PLUG RATING In
Circuit Breaker Time/Current Curves (Phase Current)
Series CT N - Frame Circuit Breakers
Equipped With Digitrip Optim Trip Units
Response: INSTANTANEOUS AND OVERRIDE
1 HOUR
5,000
Available Rating Plugs
3,000
Override
Amperes
Maximum
Ampere
Rating
Ampere
Rating
(In)
Rating Plug
Catalog
Number
800
800
700
630
600
550
500
450
400
ORPL80A800
ORPL80A700
ORPL80A630
ORPL80A600
ORPL80A550
ORPL80A500
ORPL80A450
ORPL80A400
1600 -6400
1400 -5600
1260 -5040
1200 -4800
1100 -4400
1000 -4000
900 -3600
800 -3200
11900 -16100
11900 -16100
11900 -16100
11900 -16100
11900 -16100
11900 -16100
11900 -16100
11900 -16100
1200
1200
1000
900
800
700
600
ORPL12A1200
ORPL12A1000
ORPL12A900
ORPL12A800
ORPL12A700
ORPL12A600
2400 -9600
2000 -8000
1800 -7200
1600 -6400
1400 -5600
1200 -4800
11900 -16100
11900 -16100
11900 -16100
11900 -16100
11900 -16100
11900 -16100
2,000
1,000
500
Instantaneous
Pickup Range
2 to 8 x In
Amperes
300
200
Interrupting Rating @ 50/60 Hz RMS Sym. Amperes (kA)
1 MINUTE
100
50
Breaker
UL / CSA
Type
Volts
240
480
600
ND
HND
NDC
kA
65
100
200
35
65
100
25
35
50
IEC 947-2
240
Volts
690
415
30
Rating
ND
HND
NDC
20
kA
ICU
ICS
ICU
ICS
ICU
ICS
85
100
200
85
100
100
50
70
100
50
50
50
20
25
35
10
13
18
Utilization Category A
UIMP = 8kV
Notes
1) For field testing primary injection methods, follow NEMA AB4-1991 publications.
2) Calibration response in short delay pickup range is the same for 1, 2, or 3 poles in series.
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 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 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.
4) The end of the curve is determined by the interrupting rating of the circuit breaker.
See above tabulation.
5) For ground fault time / current curves see SC-6335-96.
6) The instantaneous settings have conventional 100%, +/- 10% as the pickup points.
7) For additional curve tolerances contact Cutler-Hammer.
8) Total clearing times shown include the response times of the trip unit, the breaker opening,
and the extinction of the arcing current.
5
3
2
1
1
8
2
Available Instantaneous
Pickup Settings
2 to 8 x In ± 10%
In 0.1 Increments
.5
Fixed
Instantaneous
Override
.5
.3
Available Flat Response
Short Delay Time Settings
0.1 to 0.5 seconds
in 0.01 second increments
.2
.5
.3
.3
.2
.1
.1
.1
Application
Determines
End of Curve
.05
.05
CURRENT IN MULTIPLES OF PLUG RATING I n
AMPERES
50,000
60,000
70,000
80,000
40,000
30,000
20,000
5000
6000
7000
8000
9000
10,000
4000
3000
2000
900
1000
60
70
80
90
100
50
40
30
20
.01
6
7
8
9
10
.01
5
.02
3
.02
4
.03
2
.03
1
TIME IN SECONDS
10
Curve No. SC-6334-96
October 2006
Courtesy of NationalSwitchgear.com
Application Data
29-167N
Page 9
AB DE-ION Circuit Breakers
N-Frame Circuit Breakers Equipped with Digitrip OPTIM Trip Units; Ground Fault or Ground Fault Alarm Only
1 HOUR
6
7
8
9
10
4
5
3
2
.6
.7
.8
.9
1
.4
.5
.3
.2
.1
2 HOURS
CURRENT IN MULTIPLES OF FRAME RATING I s
10,000
Circuit Breaker Time/Current Curves (Ground Current)
Series CT N - Frame Circuit Breakers
Equipped With Digitrip Optim Trip Units
Response: GROUND FAULT TRIP OR GROUND FAULT ALARM ONLY
5,000
Available Ground Fault Ranges
3,000
2,000
Maximum
Ampere
Rating
Ground Fault
Pickup Range
0.2 to 1.0x Is
Amperes
800
160 - 800
1200
240 - 1200
1,000
500
300
200
Interrupting Rating @ 50/60 Hz RMS Sym. Amperes (kA)
1 MINUTE
100
Breaker
UL / CSA
Type
Volts
240
480
600
ND
HND
NDC
kA
65
100
200
35
65
100
25
35
50
IEC 947-2
50
Rating
30
ND
HND
NDC
kA
20
TIME IN SECONDS
.2
.5
Available Ground Fault
Pickup Settings
0.2 to 1.0 x In ±10%
in 0.1 x In increments 5
1.0
690
ICU
ICS
ICU
ICS
ICU
ICS
85
100
200
85
100
100
50
70
100
50
50
50
20
25
35
10
13
18
Utilization Category A
UIMP = 8kV
10
5
415
240
Volts
Notes
1) For field testing primary injection methods, follow NEMA AB4-1991 publications.
2) Calibration response in short delay pickup range is the same for 1, 2, or 3 poles in series.
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 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 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.
4) The end of the curve is determined by the interrupting rating of the circuit breaker.
See above tabulation.
5) For phase current curves, see SC-6331-96, SC-6332-96, SC-6333-96, and SC-6334-96,
6) The ground fault settings have conventional 100%, +/- 10% as the pickup points.
7) For additional curve tolerances contact Cutler-Hammer.
8) Total clearing times shown include the response times of the trip unit, the breaker opening,
and the extinction of the arcing current.
3
1.0
2
.5
1
1
.2
.5
.5
.5
.5
.3
Available Flat Response
Ground Fault Time Settings
0.1 to 0.5 seconds
in 0.01 second increments
.3
.3
.3
.2
.2
.1
.1
I2t Slope for
Ground Fault
Time Settings
.1
.1
Availaible I2t Response
Ground Fault Time Settings
0.1 to 0.5 seconds
in 0.01 second increments
.05
Flat Shape for
Ground Fault
Time Settings
.03
.05
.03
CURRENT IN MULTIPLES OF FRAME RATING I s
October 2006
Courtesy of NationalSwitchgear.com
6
7
8
9
10
4
5
3
2
.6
.7
.8
.9
1
.4
.5
.3
.2
6
7
8
9
10
5
4
3
2
.6
.7
.8
.9
1
.5
.4
.01
.3
.01
.2
.02
.1
.02
Curve No. SC-6335-96
Application Data
29-167N
Page 10
Cutler-Hammer
Westinghouse & Cutler-Hammer Products
Five Parkway Center
Pittsburgh, Pennsylvania, U.S.A. 15220
Printed in U.S.A.
October 2006
Courtesy of NationalSwitchgear.com