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Application Data AD01301005E effective August 2011 Series NRX
Characteristic Curves for Series NRXType NF and RF Frame with Digitrip 1150 Trip Unit
Last Revision
Long Delay I2t, Short Delay Flat and I2t response Time-Phase Current Characteristic Curve based on Ir for Series NRX Type NF Frame and Type RF Frame Circuit Breakers
August 2011
Long Delay I4t, Short Delay Flat response Time-Phase Current Characteristic Curve based on Ir for SeriesNRX Type NF Frame and Type RF Frame Circuit Breakers
IEEE Moderately Inverse, Short Delay Flat Time-Phase Current Characteristic Curve based on Ir for Series NRX Type NF Frame and Type RF Frame Circuit Breakers
IEEE Very Inverse, Short Delay Flat Time-Phase Current Characteristic Curve based on Ir for Series NRX Type NF Frame and Type RF Frame Circuit Breakers
IEEE Extremely Inverse, Short Delay Flat Time-Phase Current Characteristic Curve based on Ir for Series NRX Type NF Frame and Type RF Frame Circuit Breakers
IEC-A Normal Inverse, Short Delay Flat Time-Phase Current Characteristic Curve based on Ir for Series NRX Type NF Frame and Type RF Frame Circuit Breakers
IEC-B Very Inverse, Short Delay Flat Time-Phase Current Characteristic Curve based on Ir for Series NRX Type NF Frame and Type RF Frame Circuit Breakers
IEC-C Extremely Inverse, Short Delay Flat Time-Phase Current Characteristic Curve based on Ir for Series NRX Type NF Frame and Type RF Frame Circuit Breakers
Instantaneous Time-Phase Current Characteristic Curve based on In for Series NRX Type NF Frame Circuit Breakers
Maintenance Mode Trip Time-Phase Current Characteristic Curve for Series NRX Type NF Frame Circuit Breakers
Ground (Earth) Fault Flat and I2t – Trip or Alarm Only (LSIA style) Time-Ground Current Characteristic Curve based on In for Series NRX Type NF Frame and Type RF Frame Circuit Breakers
Maintenance Mode Trip Time-Phase Current Characteristic Curve for Series NRX Type RF Frame Circuit Breakers
Instantaneous Time-Phase Current Characteristic Curve based on In for Series NRX Type RF Frame Circuit Breakers
August 2011
August 2011
August 2011
August 2011
August 2011
August 2011
August 2011
August 2011
August 2011
August 2011
August 2011
August 2011
Characteristic Curves for Series NRX Type NF and RF Frame with Digitrip1150 Trip Unit
effective May 2011
Application Data AD01301005E Effective August 2011
searching for AD01301005E.
Series NRX Digitrip 1150 / 1150i - Curves
2 I T.5 .6 .7 .8 .9 1 2 3 4 5 6 7 8 910
20
30
40
50
500
10
20
2
3
4
5
6
7
8
9
10
20
30
40
5
0
8
0 7
0
6
0
9
0 1
00
Range: 2-24 seconds @ 6x Ir
24
10
4
2
0.50s 0.50s
August 2011
Adjustable LONG PU 0.5 to 1.0x In = Ir
with 0.05 increments See Note 1
Minimum persistence For 0.10s setting
Adjustable LONG TIME 2-24 seconds
(+0 -30%) @ 6x Ir With 0.5s increments
See Note 6
Max Total clearing time
Minimumpersistence
See Notes 4 & 8
2 Adjustable I T response
SHORT TIME 0.10 to 0.50 seconds with 0.05s increments
See Note 5
Circuit Breaker Time/Current Curves (Phase Current) Series NRX Type NF Frame and Type RF Frame Circuit Breakers
2 2Response: Long Delay (I T) & Short Delay Trip (FLAT & I T)This curve is for 50Hz or 60Hz applications.
Notes:
1. This curve shown as a multiple of the LONG PU Setting (I ). The actual pickup point (indicated by r
rapid flashing of Unit Status LED on the product) occurs at 110% of the I , current, with a ±10% r
tolerance.2
LongTIME Curve Equation: Trip = LongTIME *36/ I , where I is a multiple of I (top).r 2
LongTIME Curve Equation: Trip = LongTIME *36/ I * 0.70 (bottom).
The SHORT TIME Function and the LongTIME function act independently and the entire set of LongTIME curves continue to be active even after the curves intersect.
2. If Long Delay Memory is enabled, trip times may be shorter than indicated on this chart
3. The SHORT PU points have 100% ± 10% tolerance.
4. SHORT SLOPE: FLATTolerance is +0/ -90 ms for all settings except
0.10s setting is 0.05 to 0.130.15s setting is 0.09 to 0.17
2
5. SHORT SLOPE: I T2I T slope flattens out at 8 x I for top of band with FLAT time minimum value prevailing for bottom r
of band.2
Curve Trip Equation: Trip = SHORT TIME * 64/ I , where I is a multiple of I (top) r 2
Curve Trip Equation: Trip = SHORT TIME * 64/ I * 0.70 (bottom) The above equations indicate tolerance is
+0 / -40% for settings 0.1 to 0.25+0 / -30% for settings 0.3 to 0.50
2 For all curves the lower flat response time value projected to I T line will determine the other
Break Point and shape of the curve.
6. The end of the curve is determined by the interrupting rating of the circuit breaker.
7. Curve applies from -20°C to +55°C ambient. Temperatures above +85°C cause automatic trip.
8. Minimum persistence refers to the time at which the breaker will not trip for a given setting.
9. These curves are comprehensive for Series NRX NF and RF frame circuit breakers including all frame sizes, ratings, and constructions. The total clearing times shown include the response time for the trip unit, the breaker opening and the interruption of the current.
0.10s
Max clearing time
Break point @ 8x I to FLATr
AdjustableSHORT PU 2.0x to 10x
With 0.5 increments
1 M
INU
TE
1 H
OU
R2 H
OU
RS
TIM
E IN
SE
CO
ND
S
.5 .6 .7 .8 .9 1 2 3 4 5 6 7 8 910
20
30
40
50
60
70
Current in Multiples of Long Pickup ( I )r
Adjustable SHORT TIME 0.10s to 0.50s
With 0.05 stepsSee Note 4
80009000
10000
800
900
400
4000
2000
600
3000
1000
700
5000
6000
7000
89
5
4
30
7
6
100
200
80
90
50
40
300
70
60
1
2
3
.01
.02
.08
.09
.05
.04
.03
.07
.06
.1
.2
.8
.9
.5
.4
.3
.7
.6
1
2
.01
.02
.08
.09
.05
.04
.03
.07
.06
.1
.2
.8.9
.5
.4
.3
.7
.6
0.20s
Series NRX Digitrip 1150 / 1150i - Curves
4I T
Range: 1-5 seconds @ 6x Ir
5
1
August 2011
Adjustable LongTIME 1-5 seconds
(+10 -40%) @ 6x Ir With 0.5s increments
See Note 6
0.10s
0.50s
See Note 3
Minimum persistenceSee Note 8
Circuit Breaker Time/Current Curves (Phase Current)
Series NRX Type NF Frame and Type RF Frame Circuit Breakers4
Response: Long Delay (I T) & Short Delay TripThis curve is for 50Hz or 60Hz applications.
Notes:
1. This curve is shown as a multiple of LONG PU Setting (I ).r
The actual Pickup point occurs at 110% of the I , current, with a ±10% tolerance. r
LongTIME Curve Equation:4
Trip (top) = LongTIME *1296/I ,where I is a multiple of Ir.4
Trip (bottom) = LongTIME *1296/I * 0.70.
2. If Long Delay Memory is enabled, trip times may be shorter than indicated on this chart
4 3. In this time region <= 0.5 seconds the I T Long TIME function will flatten out and be no faster than the Short TIME setting. This is to avoid a notch in graph.
4. The SHORT PU points have conventional 100% ± 10% tolerance.
5. SHORT TIME: FLAT only - setting 0.1s through 0.5s in .05s increments. Tolerance is +0/ -80 ms of setting except
0.10s setting is 0.05 to 0.130.15s setting is 0.09 to 0.17
6. The end of the curve is determined by the interrupting rating of the circuit breaker.
7. Curve applies from -20°C to +55°C ambient. Temperatures above +85°C cause automatic trip.
8. Minimum persistence refers to the time at which the breaker will not trip for a given setting
9. These curves are comprehensive for Series NRX NF and RF frame circuit breakersincluding all frame sizes, ratings, and constructions. The total clearing times showninclude the response time for the trip unit, the breaker opening and the interruption of the current.
Adjustable SHORT PU 2.0x to 10x with 0.5
increments
1 M
INU
TE
1 H
OU
R2 H
OU
RS
TIM
E IN
SE
CO
ND
S
1
2
3
.01
.02
.08
.09
.05
.04
.03
.07
.06
.1
.2
.8
.9
.5
.4
.3
.7
.6
500
10
20
80009000
10000
800
900
400
4000
2000
600
3000
1000
700
5000
6000
7000
89
5
4
30
7
6
100
200
80
90
50
40
300
70
60
Available LONG PUSettings (I )r
0.5 to 1 x I = In r
in 0.05 increments
.5 .6 .7 .8 .9 1 2 3 4 5 6 7 8 910
20
30
40
50
60
70
Current in Multiples of Long Pickup ( I )r
.5 .6 .7 .8 .9 1 2 3 4 5 6 7 8 910
20
30
40
50
60
80
90
100
Adjustable SHORT TIME 0.10s to 0.50s
with 0.05 stepsSee note 5
Series NRX Digitrip 1150 - IEEE Curves - Moderately Inverse
August 2011
0.50 s
0.50
0.20
2.00
4.00
1.00
0.80
0.60
0.30
3.00
1.50
3.50
2.50
4.50
5.00
0.10
0.40
Adjustable PICKUP setting 0.5 to 1.0x I = In r
with 0.05 incrementsSee Note 3
Minimum persistenceSee Notes 5, 7
Adjustable SHORT PU 2.0x to 10x Ir
With 0.5 incrementsSee Note 3
AdjustableSHORT TIME 0.10s to 0.50s
With 0.05 increments
See Note 5
Adjustable TimeDial Setting 0.10 to 5.00
With 0.10 increments See Note 2
Circuit Breaker Time/Current Curves (Phase Current)
Series NRX Type NF Frame and Type RF Frame Circuit BreakersResponse: Moderately Inverse & Short Delay TripThis curve is for 50Hz or 60Hz applications.
Notes:
1. This curve is shown as a multiple of the PICKUP setting (I ). The TimeDial r
setting combined with SHORT PU and SHORT TIME setting (shown in heavy lines) depict the IEEE Moderately Inverse response. The Instantaneous, shown as a separate response, can be set to OFF.
2. Curve Equation: 0.0 2 Trip = TimeDial *[0.0515/ ( I -1) + 0.114], where I is a multiple of I .r
For current > 1.2xI tolerance is [±15%] or [-15%, +90 ms], whichever is larger. r
TimeDial curve goes to flat response at 14xI with a shorter time of TimeDial r
function or SHORT TIME function prevailing if curves overlap. The ShortTime function and the TimeDial function act independently and the entire TimeDial curves continue to be active even after the curves intersect.
3. The actual pick up point (indicated by rapid flashing of Unit Status LED on the product) occurs at 110% of the Ir, current, with a ±10% tolerance. The SHORT PU settings have conventional 100% ± 10% as their pick up point.
4. The end of the curve is determined by the interrupting rating of the circuit breaker.
5. SHORT TIME: FLAT only Tolerance is +0/ -80 ms of setting except
0.10s setting is 0.06 to 0.130.15s setting is 0.10 to 0.17
6. Curve applies from -20°C to +55°C ambient. Temperatures above +85°C cause automatic trip.
7. Minimum persistence refers to the time at which the breaker will not trip for a given setting.
8. The curves are comprehensive for Series NRX NF and RF frame circuitbreakers including all frame sizes, ratings, and constructions. The total clearing times shown include the response time for the trip unit, the breaker opening and the interruption of the current.
Current in Multiples of Long Pickup ( I )r
.5 .6 .7 .8 .9 1 2 3 4 5 6 7 8 910
20
30
40
50
60
70
80
90
100
1 M
INU
TE
1 H
OU
R2 H
OU
RS
TIM
E IN
SE
CO
ND
S
1
2
3
.01
.02
.08
.09
.05
.04
.03
.07
.06
.1
.2
.8
.9
.5
.4
.3
.7
.6
500
10
20
80009000
10000
800
900
400
4000
2000
600
3000
1000
700
5000
6000
7000
89
5
4
30
7
6
100
200
80
90
50
40
300
70
60
.5 .6 .7 .8 .9 1 2 3 4 5 6 7 8 910
20
30
40
50
60
Series NRX Digitrip 1150 - IEEE Curves - Very Inverse
0.80
0.20
2.00
1.00
1.50
0.30
0.40
0.60
3.00
2.50
5.00
4.50
4.00
3.50
August 2011
0.50 s
0.50
Adjustable PICKUP setting 0.5 to 1.0x I = In r
with 0.05 incrementsSee Note 3
Minimum persistenceSee Notes 5, 7
Adjustable SHORT PU 2.0x to 10x Ir
With 0.5 incrementsSee Note 3
AdjustableSHORT TIME 0.10s to 0.50s With 0.050sincrements See Note 5
Circuit Breaker Time/Current Curves (Phase Current)
Series NRX Type NF Frame and Type RF Frame Circuit BreakersResponse: Very Inverse & Short Delay TripThis curve is for 50Hz or 60Hz applications.
Notes:
1. This curve is shown as a multiple of the PICKUP setting (I ). The TimeDial r
setting combined with SHORT PU and SHORT TIME setting (shown in heavy lines) depict the IEEE Very Inverse response. The Instantaneous, shown as a separate response, can be set to OFF.
2. Curve Equation: 2
Trip = TimeDial *[19.61/(I -1) + 0.491], where I is a multiple of I .r For current > 1.2xI tolerance is [±15%] or [-15%, +90 ms], whichever is larger. r
TimeDial curve goes to flat response at 14xI with a shorter time of TimeDial r
function or SHORT TIME function prevailing if curves overlap. The ShortTime function and the TimeDial function act independently and the entire TimeDial curves continue to be active even after the curves intersect.
3. The actual pick up point (indicated by rapid flashing of Unit Status LED on the product) occurs at 110% of the Ir, current, with a ±10% tolerance. The SHORT PU settings have conventional 100% ± 10% as their pick up point.
4. The end of the curve is determined by the interrupting rating of the circuit breaker.
5. SHORT TIME: FLAT only Tolerance is +0/ -80 ms of setting except
0.10s setting is 0.06 to 0.130.15s setting is 0.10 to 0.17
6. Curve applies from -20°C to +55°C ambient. Temperatures above +85°C cause automatic trip.
7. Minimum persistence refers to the time at which the breaker will not trip for a given setting.
8. The curves are comprehensive for Series NRX NF and RF frame circuitbreakers including all frame sizes, ratings, and constructions. The total clearing times shown include the response time for the trip unit, the breaker opening and the interruption of the current.
.5 .6 .7 .8 .9 1 2 3 4 5 6 7 8 910
20
30
40
50
60
70
80
90
100
Current in Multiples of Long Pickup ( I )r
1 M
INU
TE
1 H
OU
R2 H
OU
RS
TIM
E IN
SE
CO
ND
S
1
2
3
.01
.02
.08
.09
.05
.04
.03
.07
.06
.1
.2
.8
.9
.5
.4
.3
.7
.6
500
10
20
80009000
10000
800
900
400
4000
2000
600
3000
1000
700
5000
6000
7000
89
5
4
30
7
6
100
200
80
90
50
40
300
70
60
.5 .6 .7 .8 .9 1 2 3 4 5 6 7 8 910
20
30
40
50
60
Adjustable TimeDial Setting 0.20 to 5.00
With 0.10 increments See Note 2
Series NRX Digitrip 1150 - IEEE Curves - Extremely Inverse
2.00
3.00
4.00
5.00
August 2011
0.50 s
2.50
3.50
4.50
0.20
0.30
0.80
0.50
0.40
0.60
1.00
1.50
Adjustable PICKUP setting 0.5 to 1.0x I = In r
with 0.05 incrementsSee Note 3
Minimum persistenceSee Notes 5, 7
Adjustable SHORT PU 2.0x to 10x Ir
With 0.5 incrementsSee Note 3
Adjustable TimeDial Setting 0.20 to 5.00
With 0.10 increments See Note 2
Current in Multiples of Pickup ( I )r
Circuit Breaker Time/Current Curves (Phase Current)
Series NRX Type NF Frame and Type RF Frame Circuit BreakersResponse: Extremely Inverse & Short Delay TripThis curve is for 50Hz or 60Hz applications.
Notes:
1. This curve is shown as a multiple of the PICKUP setting (I ). The TimeDial r
setting combined with SHORT PU and SHORT TIME setting (shown in heavy lines) depict the IEEE Extremely Inverse response. The Instantaneous, shown as a separate response, can be set to OFF.
2. Curve Equation: 2
Trip = TimeDial * [28.2/(I - 1) + 0.1217], where I is a multiple of I .r For current > 1.2xI tolerance is , whichever is larger. r
TimeDial curve goes to flat response at 14xI with a shorter time of TimeDial r
function or SHORT TIME function prevailing if curves overlap. The ShortTime function and the TimeDial function act independently and the entire TimeDial curves continue to be active even after the curves intersect.
3. The actual pick up point (indicated by rapid flashing of Unit Status LED on the product) occurs at 110% of the I , current, with a ±10% tolerance. The r
SHORT PU settings have conventional 100% ± 10% as their pick up point.
4. The end of the curve is determined by the interrupting rating of the circuit breaker.
5. SHORT TIME: FLAT only Tolerance is +0/ -80 ms of setting except
0.10s setting is 0.06 to 0.130.15s setting is 0.10 to 0.17
6. Curve applies from -20°C to +55°C ambient. Temperatures above +85°C cause automatic trip.
7. Minimum persistence refers to the time at which the breaker will not trip for a given setting.
8. The curves are comprehensive for Series NRX NF and RF frame circuitbreakers including all frame sizes, ratings, and constructions. The total clearing times shown include the response time for the trip unit, the breaker opening and the interruption of the current.
[±15%] or [-15%, +90 ms]
1 M
INU
TE
1 H
OU
R2 H
OU
RS
TIM
E IN
SE
CO
ND
S
1
2
3
.01
.02
.08
.09
.05
.04
.03
.07
.06
.1
.2
.8
.9
.5
.4
.3
.7
.6
500
10
20
80009000
10000
800
900
400
4000
2000
600
3000
1000
700
5000
6000
7000
89
5
4
30
7
6
100
200
80
90
50
40
300
70
60
.5 .6 .7 .8 .9 1 2 3 4 5 6 7 8 910
20
30
40
50
60
.5 .6 .7 .8 .9 1 2 3 4 5 6 7 8 910
20
30
40
50
60
70
80
90
100
AdjustableSHORT TIME
0.10s to 0.50s With 0.05Increments
See Note 5
Series NRX Digitrip 1150i - IEC Curves - IEC-A (Normal Inverse).5 .6 .7 .8 .9 1 2 3 4 5 6 7 8 9 1
0 20
30
40
50
60
70
.5 .6 .7 .8 .9 1 2 3 4 5 6 7 8 910
20
30
40
50
60
70
80
90
100
1.00
0.70
0.50
0.20
0.30
0.50 s
August 2011
0.10
0.15
0.05
0.90
0.80
0.60
0.40
Adjustable PICKUP0.5 to 1.0x I = In r
with 0.05 incrementsSee Note 3
Circuit Breaker Time/Current Curves (Phase Current)
Series NRX Type NF Frame and Type RF Frame Circuit BreakersResponse: Normal Inverse & Short Delay TripThis curve is for 50Hz or 60Hz applications.
Notes:
1. This curve is shown as a multiple of the PICKUP setting (I ). Ther
TimeDial setting combined with SHORT PU and SHORT TIME setting(shown in heavy lines) depict the IEC-A response. The Instantaneous,shown as a separate response, can be set to OFF.
0.0 22. Curve Equation: Trip = TimeDial *[ 0.14 / ( I -1) ]where I is a multiple of I .r
For current > 1.2xI tolerance is [±15%] or [-15%, +90 ms], whichever is r
larger.
TimeDial curve goes to flat response at 14xI with a shorter time ofr
TimeDialfunction or SHORT TIME function prevailing if curves overlap.The ShortTime function and the TimeDial function act independently and the entire TimeDial curves continue to be active even after the curves intersect.
3. The actual pick up point (indicated by rapid flashing of Unit Status LED on the product) occurs at 110% of the I , current, with a ±10% tolerance.r
The SHORT PU settings have conventional 100% ± 10% as their pick uppoint.
4. The end of the curve is determined by the interrupting rating of thecircuit breaker.
5. SHORT TIME: FLAT onlyTolerance is +0/ -80 ms of setting except0.10s setting is 0.06 to 0.130.15s setting is 0.10 to 0.17
6. Curve applies from -20°C to +55°C ambient. Temperatures above 85°Ccause automatic trip.
7. Minimum persistence refers to the time at which the breaker will not trip for a given setting
8. The curves are comprehensive for Series NRX NF and RF frame circuit breakers including all frame sizes, ratings, and constructions. The totalclearing times shown include the response time for the trip unit, the breaker opening and the interruption of the current.
Adjustable TimeDialSetting 0.05 to 1.00
With 0.05 increments See Note 2
Adjustable SHORT PU2.0x to 10x Ir
With 0.5 incrementsSee Note 3
Minimum persistenceSee Notes 5, 7
AdjustableSHORT TIME0.10s to 0.50s
With 0.05 incrementsSee Note 5
Current in Multiples of of Pickup ( I )r
1 M
INU
TE
1 H
OU
R2 H
OU
RS
TIM
E IN
SE
CO
ND
S
.01
.02
.03
.04
.05
.06
.07
.08
.09.1
.2
.4
.3
.5
.6
.7
.8
.91
2
3
4
5
6
7
89
10
20
30
40
50
60
708090
100
300
400
500
600
700
800900
200
1000
2000
3000
7000
80009000
4000
5000
6000
10000
Series NRX Digitrip 1150i - IEC Curves - IEC-B (Very Inverse).5 .6 .7 .8 .9 1 2 3 4 5 6 7 8 910
20
30
40
50
60
70
.5 .6 .7 .8 .9 1 2 3 4 5 6 7 8 910
20
30
40
50
60
70
80
90
100
August 2011
1.00
0.70
0.50
0.20
0.30
0.10
0.15
0.90
0.80
0.60
0.40
Adjustable PICKUP0.5 to 1.0x I = In r
with 0.05 incrementsSee Note 3
Minimum persistenceSee Notes 5, 7
Adjustable TimeDialSetting 0.10 to 1.00
With 0.05 incrementsSee Note 2
AdjustableSHORT TIME0.10s to 0.50s
With 0.05 incrementsSee Note 5
Circuit Breaker Time/Current Curves (Phase Current)
Series NRX Type NF Frame and Type RF Frame Circuit BreakersResponse: Very Inverse & Short Delay TripThis curve is for 50Hz or 60Hz applications.
Notes:
1. This curve is shown as a multiple of the PICKUP setting (I ). The TimeDialr
setting combined with SHORT PU and SHORT TIME setting (shown in heavylines) depict the IEC-B response. The Instantaneous, shown as a separate response, can be set to OFF.
2. Curve Equation: Trip = TimeDial *[ 13.5 / (I -1)], where I is a multiple of I .rFor current > 1.2xI tolerance is [±15%] or [-15%, +90 ms], whichever is larger. r
TimeDial curve goes to flat response at 14xI with a shorter time of TimeDial r
function or SHORT TIME function prevailing if curves overlap. The ShortTime function and the TimeDial function act independently and the entire TimeDial curves continue to be active even after the curves intersect.
3. The actual pick up point (indicated by rapid flashing of Unit Status LED on the product) occurs at 110% of the I , current, with a ±10% tolerance. The SHORT PU r
settings have conventional 100% ± 10% as their pick up point.
4. The end of the curve is determined by the interrupting rating of the circuitbreaker.
5. SHORT TIME: FLAT only Tolerance is +0/ -80 ms of setting except
0.10s setting is 0.06 to 0.130.15s setting is 0.10 to 0.17
6. Curve applies from -20°C to +55°C ambient. Temperatures above +85°C causeautomatic trip.
7. Minimum persistence refers to the time at which the breaker will not trip for a given setting
8. The curves are comprehensive for Series NRX NF and RF frame circuit breakersincluding all frame sizes, ratings, and constructions. The total clearing timesshown include the response time for the trip unit, the breaker opening and theinterruption of the current.
Current in Multiples of Pickup ( )Ir
Adjustable SHORT PU2.0x to 10x Ir
With 0.5 incrementsSee Note 3
0.50 s
9000
2 H
ours
10000
70008000
5000
6000
3000
4000
1 H
our
2000
1000900800700
600
500
400
300
200
100
50
9080
70
60
40
1 M
inu
te
30
20
109
.9
8
7
6
5
4
3
2
1
TIM
E I
N S
EC
ON
DS
.8
.7
.6
.5
.4
.3
.2
.1
.07
.06
.05
.04
.03
.09
.08
.02
.01
Series NRX Digitrip 1150i - IEC Curves - IEC-C (Extremely Inverse).5 .6 .7 .8 .9 1 2 3 4 5 6 7 8 9
10
20
30
40
50
60
70
80
.5 .6 .7 .8 .9 1 2 3 4 5 6 7 8 910
20
30
40
50
60
70
80
90
100
0.50 s
August 2011
0.70
0.30
0.60
0.40
1.00
0.90
0.50
0.80
Adjustable PICKUP0.5 to 1.0x I = In r
with 0.05 incrementsSee Note 3
Minimum persistenceSee Notes 5, 7
Adjustable SHORT PU 2.0x to 10x Ir
With 0.5 incrementsSee Note 3
Adjustable TimeDial Setting 0.15 to 1.00
With 0.05 increments See Note 2
Circuit Breaker Time/Current Curves (Phase Current)
Series NRX Type NF Frame and Type RF Frame Circuit BreakersResponse: Extremely Inverse & Short Delay TripThis curve is for 50Hz or 60Hz applications.
Notes:
1. This curve is shown as a multiple of the PICKUP setting (I ). The TimeDial r
setting combined with SHORT PU and SHORT TIME setting (shown in heavy lines) depict the IEC-C response. The Instantaneous, shown as a separate response, can be set to OFF.
2. Curve Equation: 2
Trip = TimeDial *[ 80.0/ (I - 1)], where I is a multiple of I .r For current > 1.2xI tolerance is [±15%] or [-15%, +90 ms], whichever is larger. r
TimeDial curve goes to flat response at 14xI with a shorter time of TimeDial r
function or SHORT TIME function prevailing if curves overlap. The ShortTime function and the TimeDial function act independently and the entire TimeDial curves continue to be active even after the curves intersect.
3. The actual pick up point (indicated by rapid flashing of Unit Status LED on the product) occurs at 110% of the I , current, with a ±10% tolerance. The SHORT r
PU settings have conventional 100% ± 10% as their pick up point.
4. The end of the curve is determined by the interrupting rating of the breaker.
5. SHORT TIME: FLAT only Tolerance is +0/ -80 ms of setting except
0.10s setting is 0.06 to 0.130.15s setting is 0.10 to 0.17
6. Curve applies from -20°C to +55°C ambient; temperatures above 85°C cause automatic trip.
7. Minimum persistence refers to the time at which the breaker will not trip for a given setting.
8. The curves are comprehensive for Series NRX NF and RF frame circuitbreakers including all frame sizes, ratings, and constructions. The total clearing times shown include the response time for the trip unit, the breaker opening and the interruption of the current.
Current in Multiples of Pickup ( I )r
Adjustable SHORT TIME 0.10s to 0.50s
With 0.05 increments See Note 5
0.20
1 H
ou
r2
Ho
urs
1 M
inute
Tim
e in
Seco
nds
2000
3000
4000
5000
6000
7000
8000
10000
1000
30
40
50
80 70
60
90
20
9000
900 800 700
600
500
400
300
200
100
10 9 8
7
6
5
4
3
2
1 .9
.09 .08
.07
.6
.5
.4
.3
.2
.1
.8
.7
.06
.05
.04
.03
.02
.01
Current in Multiples of Rating ( I )n
Series NRX - Type NF Frame with Digitrip1150 / 1150i - Instantaneous Curve
.01
2
60
70
8090
100
1000900800
700
600
500
400
300
200
2000
3000
4000
5000
6000
70008000
900010000
.02
.03
.04
.05
.06
.07
.08
.09.1
.2
.3
.4
.5
.6
.7
.8
.91
3
4
5
6
7
8
910
20
30
40
501 M
INU
TE
2 H
OU
RS
TIM
E I
N S
EC
ON
DS
1 H
OU
R
1 2 3 4.5 .6 .7 .8 .9
10
205 6 7 8 9
1 2 3 4.5 .6 .7 .8 .9 10
20
30
40
50 5 6 7 8 9
Available AdjustableInstantaneous
Setting 2 to 12x I ± 10%n
(See Notes 4, 6)
June 2011
Circuit Breaker Time / Current Curves(Phase Current)
Series NRX - Type NF Frame Circuit BreakersResponse: Instantaneous TripThis curve is for 50Hz and 60Hz applications.
Notes:
1. The end of the curve is determined by the interrupting rating of the circuit breaker.
2. This curve is shown as a multiple of the Rating Plug (I ).n
3. If Long Delay Memory is enabled, trip times may be shorter than indicated on this chart
4. The Instantaneous settings have conventional 100% ±10% as the pickup points.
5. Total clearing times shown include the response times of the trip unit, the breaker opening and the interruption of the current.
6. An additional, fixed High Instantaneous Trip function is provided in the circuit breaker set to pickup at 90kA Instantaneous peak current level.
This protection is functional even when the Instantaneous is set to the OFF position.
7. These curves are comprehensive for Series NRX - Type NF frame circuitbreakers, including all frame sizes, ratings, and constructions. The totalInstantaneous clearing times shown are conservative and consider themaximum response times of the trip unit, the circuit breaker opening, and the interruption of the current under factors that contribute to worst caseconditions, like: maximum rated voltages, single phase interruption, and
minimum power factor. Faster clearing times are possible depending on thespecific system conditions, the type of circuit breaker applied, and if any arc reduction settings are employed. Contact Eaton Corporation for additionalInformation.
Thecircuit breaker’s Short Delay rating is marked according to Test Standards with a 42kA current value.
30
40
50
3
4
6
8
10
Symmetrical RMS Current (kA)
10
20
30
40
100
200
300
400
500
50
60
70
80
90
1000
600
700
800
900
HighInstantaneous(See Note 6)
.01
.02
.03
.04
.05
.06
.07
.08
.09.1
.2
.3
.4
.5
.6
.7
.8
.91
TIM
E IN
SE
CO
ND
S
2
60
70
8090
100
1000900800
700
600
500
400
300
200
2000
3000
4000
5000
6000
70008000
900010000
3
4
5
6
7
8
910
20
30
40
501 M
INU
TE
2 H
OU
RS
1 H
OU
R
2
12
Current in Multiples of Rating ( I )n
Series NRX - Type RF Frame with Digitrip1150 / 1150i - Instantaneous Curve
.01
2
60
70
8090
100
1000900800
700
600
500
400
300
200
2000
3000
4000
5000
6000
70008000
900010000
.02
.03
.04
.05
.06
.07
.08
.09.1
.2
.3
.4
.5
.6
.7
.8
.91
3
4
5
6
7
8
910
20
30
40
501 M
INU
TE
2 H
OU
RS
TIM
E I
N S
EC
ON
DS
1 H
OU
R
1 2 3 4.5 .6 .7 .8 .9
10
205 6 7 8 9
1 2 3 4.5 .6 .7 .8 .9 10
20
30
40
50 5 6 7 8 9
Available AdjustableInstantaneous
Setting 2 to 12x I ± 10%n
(See Notes 2, 3)
August 2011
Circuit Breaker Time / Current Curves(Phase Current)
Series NRX - Type RF Frame Circuit BreakersResponse: Instantaneous TripThis curve is for 50Hz and 60Hz applications.
Notes:
1. The end of the curve is determined by the interrupting rating of the circuit breaker.
2. This curve is shown as a multiple of the Rating Plug (I ).n
3. The Instantaneous settings have conventional 100% ±10% as the pickup points.
4. On the RF Frame, an additional, fixed High Instantaneous Trip function is provided in the circuit breaker.
This protection is functional even when the Instantaneous is set to the OFF position.
5. Contact Eaton Corporation for availability of the 85kA and 100kA options
6. These curves are comprehensive for Series NRX - Type NF frame circuitbreakers, including all frame sizes, ratings, and constructions. The totalInstantaneous clearing times shown are conservative and consider themaximum response times of the trip unit, the circuit breaker opening, and the interruption of the current under factors that contribute to worst caseconditions, like: maximum rated voltages, single phase interruption, and
minimum power factor. Faster clearing times are possible depending on thespecific system conditions, the type of circuit breaker applied, and if any arc reduction settings are employed. Contact Eaton Corporation for additionalInformation.
The circuit breaker’s Short Delay rating is marked according to Test Standards with a preset value.
30
40
50
3
4
6
8
10
Symmetrical RMS Current (kA)
10
20
30
40
100
200
300
400
500
50
60
70
80
90
1000
600
700
800
900
.01
.02
.03
.04
.05
.06
.07
.08
.09.1
.2
.3
.4
.5
.6
.7
.8
.91
TIM
E IN
SE
CO
ND
S
2
60
70
8090
100
1000900800
700
600
500
400
300
200
2000
3000
4000
5000
6000
70008000
900010000
3
4
5
6
7
8
910
20
30
40
501 M
INU
TE
2 H
OU
RS
1 H
OU
R
2
12
HighInstantaneous
RF Frame ONLY(See Notes 4 & 5)
65kA 85kA
100kA See Note 1
See Note 1
65kA85kA
100kA
Symmetrical RMS Current
Inst PeakAsymmetrical
65kA85kA
100kA
138kA140kA212kA
RMS Current (kA)
August 2011
.01
2
60
70
8090
100
1000900800
700
600
500
400
300
200
2000
3000
4000
5000
6000
70008000
900010000
.02
.03
.04
.05
.06
.07
.08
.09.1
.2
.3
.4
.5
.6
.7
.8
.91
3
4
5
6
7
8
910
20
30
40
501 M
INU
TE
2 H
OU
RS
TIM
E I
N S
EC
ON
DS
1 H
OU
R
4.0
1 2 3 4.5 .6 .7 .8 .9
10
205 6 7 8 9
.01
1 2 3 4.5 .6 .7 .8 .9
10
20
30
40
50
60
70
80
90
100
200
100
300
400
500
800
700
600
900 5 6 7 8 9
.02
.03
.04
.05
.06
.07
.08
.09
.1
.2
.3
.4
.5
.6
.7
.8
.9
TIM
E IN
SE
CO
ND
S
Maintenance Mode Characteristic
Series NRX - Type NF Frame Circuit BreakersResponse: Maintenance Mode TripThis curve is for 50Hz and 60Hz applications.
Notes:
1. The Maintenance Mode feature must be ENABLED via trip unit keypad, remote switch, or Communications for these curves to apply. Maintenance Mode IN USE message is displayed.
2. The end of the curve is determined by the interrupting rating of the circuit breaker.
4. The Digitrip 1150ARM will light the Instantaneous LED for a Maintenance Mode Trip.
5. Nominal Reduction Values have a tolerance of ±15%
6. 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 under factors that contribute to worst case conditions, like: maximum rated voltages, single phase interruption, and minimum power factor. Faster clearing times are possible depending on the specific system conditions, and the type of NRX Circuit Breaker applied.
Contact Eaton Electrical for additional information.
20 30
40
50
60
70
80
90
200
See Note 2
20
1000
Maximum Available Arc Flash
Reduction Setting1.0kA
5.0
2.0
3.0
1.0
Minimum Available Arc Flash
Reduction Setting5.0kA
Series NRX Type NF Frame using Digitrip 1150 /1150i with Maintenance Mode Trip
RMS Current (kA)
August 2011
Series NRX Type RF Frame using Digitrip 1150 /1150i with Maintenance Mode Trip
.01
2
60
70
8090
100
1000900800
700
600
500
400
300
200
2000
3000
4000
5000
6000
70008000
900010000
.02
.03
.04
.05
.06
.07
.08
.09.1
.2
.3
.4
.5
.6
.7
.8
.91
3
4
5
6
7
8
910
20
30
40
501 M
INU
TE
2 H
OU
RS
TIM
E I
N S
EC
ON
DS
1 H
OU
R
16.0
1 2 3 4.5 .6 .7 .8 .9
10
205 6 7 8 9
.01
1 2 3 4.5 .6 .7 .8 .9
10
20
30
40
50
60
70
80
90
100
200
100
300
400
500
800
700
600
900 5 6 7 8 9
.02
.03
.04
.05
.06
.07
.08
.09
.1
.2
.3
.4
.5
.6
.7
.8
.9
TIM
E IN
SE
CO
ND
S
Maintenance Mode Characteristic
Series NRX - Type RF Frame Circuit BreakersResponse: Maintenance Mode TripThis curve is for 50Hz and 60Hz applications.
Notes:
1. The Maintenance Mode feature must be ENABLED via trip unit keypad, remote switch, or Communications for these curves to apply. Maintenance Mode IN USE message is displayed.
2. The end of the curve is determined by the interrupting rating of the circuit breaker.
4. The Digitrip 1150ARM will light the Instantaneous LED for a Maintenance Mode Trip.
5. Nominal Reduction Values have a tolerance of ±15%
6. 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 under factors that contribute to worst case conditions, like: maximum rated voltages, single phase interruption, and minimum power factor. Faster clearing times are possible depending on the specific system conditions, and the type of NRX Circuit Breaker applied.
Contact Eaton Electrical for additional information.
20 30
40
50
60
70
80
90
200
See Note 2
20
1000
Maximum Available Arc Flash
Reduction Setting4.0kA
20.0
Minimum Available Arc Flash
Reduction Setting20.0kA
12.0
8.0
4.0
.01
.02
.03
.04
.05
.06
.07
.08
.09.1
.2
.3
.4
.5
.6
.7
.8
.91
2
3
4
5
6
78
910
20
TIM
E IN
SE
CO
ND
S
.1.0
9.0
8
Current in Multiples of Rating ( I )n
Available GND PU Setting0.24to 1. 0x I ±10%
with steps of 0.01.See Note 5
n
Available GND PU Setting0.24 to 1.0x I ±10%n
with steps of 0.01.See Note 5
Available FLAT responseGROUND TIME
0.1 to 0.5 secondswith 0.05s increments
FLAT response for GROUND TIME
See Note 7
See Notes 6, 7
August 2011
Series NRX - Type NF and RF Frame with Digitrip 1150 / 1150i - Ground (Earth) Curve
Series NRX - Type NF and RF Frame Circuit Breakers2Response: Ground (Earth) Trip (FLAT & I T)
This curve is for 50Hz or 60Hz applications.
Notes:
1. The end of the curve is determined by the interrupting rating of the circuit breaker.
2. The curve is shown as a multiple of the Rating Plug (I ).n
3. The Ground Fault settings have conventional 100% ± 10% as their pick up points.
4. Except as noted, tolerances on current levels are ±10% of values shown in chart.
5. The Ground Fault Pickup is limited to 1200A setting for the Digitrip 1150 unit. The Digitrip 1150i unit only has a minimum Earth Pickup setting starting at 0.1 x I .n
6. Ground Slope: FLAT Tolerance is +0 / -80 ms except 0.10s setting band is 0.05 to 0.13
0.15s setting band is 0.09 to 0.17
2 7. Ground Slope: I T
2 I T slope flattens out at 0.625x I for top of band with FLAT time minimum value n
prevailing for bottom of band. 2
Curve Trip Equation: Trip = (GROUND TIME) x 0.39 / I (top band) n2 Curve Trip Equation: Trip = ((GROUND TIME) x 0.39 / I ) * 0.70 (bottom band) n
The above equations indicate tolerance is +0 / -30% for all settings except 0.10s is +30% -25%
0.15s is +20% -25% 0.20s is +10% -25%
8. The curves are comprehensive for Series NRX NF and RF frame circuit breakersincluding all frame sizes, ratings, and constructions. The total clearing times shown include the response time for the trip unit, the breaker opening and theinterruption of the current.
Circuit Breaker Time/Current Curves (Ground Current)
0.50s 0.50s
0.10s
Break point @ 0.625x I to FLATn
1 M
INU
TE
1 H
OU
R2 H
OU
RS
TIM
E IN
SE
CO
ND
S
1
2
3
.01
.02
.08
.09
.05
.04
.03
.07
.06
.1
.2
.8
.9
.5
.4
.3
.7
.6
500
10
20
80009000
10000
800
900
400
4000
2000
600
3000
1000
700
5000
6000
7000
89
5
4
30
7
6
100
200
80
90
50
40
300
70
60
.5 .6 .7 .8 .9 1 2 3 4 5 6 7 8 910
20
30
40
50
60
.2 .4.3 .5 .6 .7 .8 .9 1 2 3 4 5 6 7 8 910
2Available I T Response
GROUND TIME 0.1 to 0.5 seconds
with 0.01s increments
Min Persistencefor 0.1s setting
Max Clearing Time
.07
.06
.05 .2 .4.3 .5 .6 .7 .8 .9 1 2 3 4 5 6 7 8 9
10
effective August 2011
Disclaimer of warranties and limitation of liability
The information, recommendations, descriptions, and safety notations in this document are based on Eaton Corporation’s (“Eaton”) experience and judgment, and may not cover all contin-
should be consulted.
Sale of the product shown in this literature is subject to the terms and conditions outlined in appropriate Eaton selling poli-cies or other contractual agreement between Eaton and the pur-chaser.
THERE ARE NO UNDERSTANDINGS, AGREEMENTS, WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE OR MERCHANTABILITY, OTHER THAN THOSE SPECIFICALLY SET OUT IN ANY EXISTING CONTRACT BETWEEN THE PARTIES. ANY SUCH CONTRACT STATES THE ENTIRE OBLIGATION OF
EATON. THE CONTENTS OF THIS DOCUMENT SHALL NOT BECOME PART OF OR MODIFY ANY CONTRACT BETWEEN THE PARTIES.
In no event will Eaton be responsible to the purchaser or user in contract, in tort (including negligence), strict liability, or otherwise for any special, indirect, incidental, or consequential damage or loss whatsoever, including but not limited to damage or loss of use of equipment, plant or power system, cost of capital, loss of power, additional expenses in the use of existing power facilities, or claims against the purchaser or user by its customers resulting from the use of the information, recommendations, and descrip-tions contained herein.
The information contained in this manual is subject to change without notice.
Eaton CorporationElectrical Group1000 Cherrington ParkwayMoon Township, PA 15108United States877-ETN-CARE (877-386-2273)Eaton.com
© 2010 Eaton CorporationAll Rights ReservedPrinted in USAPublication No. AD01301005EH02August 2011
PowerChain Management is a registered trademark of Eaton Corporation.
All other trademarks are property of their respective owners.
Application DataAD01301005ECharacteristic Curves for Series NRXType NF and RF Frame with Digitrip1150 Trip Unit
Data 1301005E effective July 2011 Series NRX