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Application Data AD01301005E effective August 2011 Series NRX
Characteristic Curves for Series NRX
Type 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 Series
NRX 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 I
rfor 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 I r for SeriesNRX 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
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Characteristic Curves for Series NRX
Type NF and RF Frame with Digitrip
1150 Trip Unit
effective May 2011
Application DataAD01301005EEffective August 2011
searching for AD01301005E.
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Series NRX Digitrip 1150 / 1150i - Curves
2I T
.5 .
6.
7.
8 .91 2 3 4 5 6 7 89
10
20
30
40
50
500
10
20
Range: 2-24 seconds @ 6x Ir
24
10
4
2
0.50s 0.50s
Adjustable LONG PU0.5 to 1.0x In = Ir
with 0.05 incrementsSee Note 1
Minimum persistenceFor 0.10s setting
Adjustable LONG TIME2-24 seconds
(+0 -30%) @ 6x IrWith 0.5s increments
See Note 6
Max Totalclearing time
Minimum
persistenceSee Notes 4 & 8
2Adjustable I T response
SHORT TIME0.10 to 0.50 secondswith 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 byrrapid 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).r2
LongTIME Curve Equation: Trip = LongTIME *36/ I * 0.70 (bottom).
The SHORT TIME Function and the LongTIME function act independently and the entire set ofLongTIME 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 bottomrof band.
2Curve Trip Equation: Trip = SHORT TIME * 64/ I , where I is a multiple of I (top)r
2Curve 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
2For all curves the lower flat response time value projected to I T line will determine the otherBreak 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 -20C to +55C ambient. Temperatures above +85C 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 includingall frame sizes, ratings, and constructions. The total clearing times shown include the responsetime 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 PU2.0x to 10x
With 0.5 increments
TIM
EIN
SEC
ONDS
AdjustableSHORT TIME0.10s to 0.50s
With 0.05 stepsSee Note 4
8000
9000
10000
800
900
400
4000
2000
600
3000
1000
700
5000
6000
7000
8
9
5
4
30
7
6
100
200
80
90
50
40
300
70
60
1
2
3
.02
.08
.09
.05
.04
.03
.07
.06
.1
.2
.8
.9
.5
.4
.3
.7
.6
0.20s
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Series NRX Digitrip 1150 / 1150i - Curves
4I T
Range: 1-5 seconds @ 6x Ir
5
1
Adjustable LongTIME1-5 seconds
(+10 -40%) @ 6x IrWith 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 ).rThe 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
43. In this time region
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Series NRX Digitrip 1150 - IEEE Curves - Moderately Inverse
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 PICKUPsetting 0.5 to 1.0x I = In r
with 0.05 incrementsSee Note 3
Minimum persistenceSee Notes 5, 7
Adjustable SHORT PU2.0x to 10x Ir
With 0.5 incrementsSee Note 3
AdjustableSHORT TIME0.10s to 0.50s
With0.05 increments
See Note 5
Adjustable TimeDialSetting 0.10 to 5.00
With 0.10 incrementsSee 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 TimeDialrsetting combined with SHORT PU and SHORT TIME setting (shown in heavylines) 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 .rFor current > 1.2xI tolerance is [15%] or [-15%, +90 ms], whichever is larger.rTimeDial curve goes to flat response at 14xI with a shorter time of TimeDialrfunction or SHORT TIME function prevailing if curves overlap. The ShortTimefunction and the TimeDial function act independently and the entire TimeDialcurves continue to be active even after the curves intersect.
3. The actual pick up point (indicated by rapid flashing of Unit Status LED on theproduct) occurs at 110% of the Ir, current, with a 10% tolerance. The SHORTPU 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 onlyTolerance 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 -20C to +55C ambient. Temperatures above +85C causeautomatic trip.
7. Minimum persistence refers to the time at which the breaker will not trip for agiven setting.
8. The curves are comprehensive for Series NRX NF and RF frame circuitbreakers including all frame sizes, ratings, and constructions. The totalclearing times shown include the response time for the trip unit, thebreaker opening and the interruption of the current.
TIMEI N
SECON
DS
1
2
3
.02
.08
.09
.05
.04
.03
.07
.06
.1
.2
.8
.9
.5
.4
.3
.7
.6
500
10
20
8000
9000
10000
800
900
400
4000
2000
600
3000
1000
700
5000
6000
7000
8
9
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 9
10
20
30
40
50
60
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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
0.50 s
0.50
Adjustable PICKUPsetting 0.5 to 1.0x I = In r
with 0.05 incrementsSee Note 3
Minimum persistenceSee Notes 5, 7
Adjustable SHORT PU2.0x to 10x Ir
With 0.5 incrementsSee Note 3
AdjustableSHORT TIME0.10s to 0.50sWith 0.050sincrementsSee 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 TimeDialrsetting combined with SHORT PU and SHORT TIME setting (shown in heavylines) depict the IEEE Very Inverse response. The Instantaneous, shown as aseparate 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 .rFor current > 1.2xI tolerance is [15%] or [-15%, +90 ms], whichever is larger.rTimeDial curve goes to flat response at 14xI with a shorter time of TimeDialrfunction or SHORT TIME function prevailing if curves overlap. The ShortTimefunction and the TimeDial function act independently and the entire TimeDialcurves 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 SHORTPU 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 onlyTolerance 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 -20C to +55C ambient. Temperatures above +85C causeautomatic trip.
7. Minimum persistence refers to the time at which the breaker will not trip for agiven setting.
8. The curves are comprehensive for Series NRX NF and RF frame circuitbreakers including all frame sizes, ratings, and constructions. The totalclearing times shown include the response time for the trip unit, thebreaker opening and the interruption of the current.
TIMEI N
SECON
DS
1
2
3
.02
.08
.09
.05
.04
.03
.07
.06
.1
.2
.8
.9
.5
.4
.3
.7
.6
500
10
20
8000
9000
10000
800
900
400
4000
2000
600
3000
1000
700
5000
6000
7000
8
9
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 9
10
20
30
40
50
60
Adjustable TimeDialSetting 0.20 to 5.00
With 0.10 increments See Note 2
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Series NRX Digitrip 1150 - IEEE Curves - Extremely Inverse
2.00
3.00
4.00
5.00
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 PICKUPsetting 0.5 to 1.0x I = In r
with 0.05 incrementsSee Note 3
Minimum persistenceSee Notes 5, 7
Adjustable SHORT PU2.0x to 10x Ir
With 0.5 incrementsSee Note 3
Adjustable TimeDialSetting 0.20 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: 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 TimeDialrsetting combined with SHORT PU and SHORT TIME setting (shown in heavylines) 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 .rFor current > 1.2xI tolerance is , whichever is larger.rTimeDial curve goes to flat response at 14xI with a shorter time of TimeDialrfunction or SHORT TIME function prevailing if curves overlap. The ShortTimefunction and the TimeDial function act independently and the entire TimeDialcurves continue to be active even after the curves intersect.
3. The actual pick up point (indicated by rapid flashing of Unit Status LED on theproduct) occurs at 110% of the I , current, with a 10% tolerance. TherSHORT 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 circuitbreaker.
5. SHORT TIME: FLAT onlyTolerance 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 -20C to +55C ambient. Temperatures above +85C causeautomatic trip.
7. Minimum persistence refers to the time at which the breaker will not trip for agiven setting.
8. The curves are comprehensive for Series NRX NF and RF frame circuitbreakers including all frame sizes, ratings, and constructions. The totalclearing times shown include the response time for the trip unit, thebreaker opening and the interruption of the current.
[15%] or [-15%, +90 ms]
TIMEI N
SECON
DS
1
2
3
.02
.08
.09
.05
.04
.03
.07
.06
.1
.2
.8
.9
.5
.4
.3
.7
.6
500
10
20
8000
9000
10000
800
900
400
4000
2000
600
3000
1000
700
5000
6000
7000
8
9
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 9
10
20
30
40
50
60
AdjustableSHORT TIME0.10s to 0.50s
With 0.05Increments
See Note 5
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Series NRX Digitrip 1150i- IEC Curves - IEC-A (Normal Inverse)
.5 .6 .7
.8 .
91 2 3 4 5 6 7 8 9 1
020
30
40
50
60
70
1.00
0.70
0.50
0.20
0.30
0.50 s
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 ). TherTimeDial 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 isrlarger.
TimeDial curve goes to flat response at 14xI with a shorter time ofrTimeDialfunction or SHORT TIME function prevailing if curves overlap.The ShortTime function and the TimeDial function act independentlyand the entire TimeDial curves continue to be active even after thecurves intersect.
3. The actual pick up point (indicated by rapid flashing of Unit Status LEDon the product) occurs at 110% of the I , current, with a 10% tolerance.rThe 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 -20C to +55C ambient. Temperatures above 85Ccause automatic trip.
7. Minimum persistence refers to the time at which the breaker will not trip fora given setting
8. The curves are comprehensive for Series NRX NF and RF frame circuitbreakers 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 incrementsSee Note 2
Adjustable SHORT PU2.0x to 10x Ir
With 0.5 incrementsSee Note 3
Minimum persistence
See Notes 5, 7
AdjustableSHORT TIME0.10s to 0.50s
With 0.05 incrementsSee Note 5
TIM
EIN
SE
CONDS
.02
.03
.04
.05
.06
.07
.08
.09
.1
.2
.4
.3
.5
.6
.7
.8
.9
1
2
3
4
5
6
78
9
10
20
30
40
50
60
70
80
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100
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800
900
200
1000
2000
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7000
8000
9000
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Series NRX Digitrip 1150i - IEC Curves - IEC-B (Very Inverse)
.5 .
6.
7.
8 .9 1 2 3 4 5 6 7 8 9
10
20
30
40
50
60
70
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 TimeDialrsetting combined with SHORT PU and SHORT TIME setting (shown in heavylines) depict the IEC-B response. The Instantaneous, shown as a separateresponse, 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.rTimeDial curve goes to flat response at 14xI with a shorter time of TimeDialrfunction or SHORT TIME function prevailing if curves overlap. The ShortTimefunction and the TimeDial function act independently and the entire TimeDialcurves continue to be active even after the curves intersect.
3. The actual pick up point (indicated by rapid flashing of Unit Status LED on theproduct) occurs at 110% of the I , current, with a 10% tolerance. The SHORT PUrsettings 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 onlyTolerance 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 -20C to +55C ambient. Temperatures above +85C causeautomatic trip.
7. Minimum persistence refers to the time at which the breaker will not trip for agiven 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.
Adjustable SHORT PU2.0x to 10x Ir
With 0.5 incrementsSee Note 3
0.50 s
900010000
7000
8000
5000
6000
3000
4000
2000
1000900
800
700
600
500
400
300
200
100
50
90
80
70
60
40
30
20
109
.9
87
6
5
4
3
2
1
TIMEIN
SECONDS
.8
.7
.6
.5
.4
.3
.2
.1
.07
.06
.05
.04
.03
.09
.08
.02
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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
0.50 s0.70
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 PU2.0x to 10x Ir
With 0.5 incrementsSee Note 3
Adjustable TimeDialSetting 0.15 to 1.00
With 0.05 incrementsSee 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 TimeDialrsetting combined with SHORT PU and SHORT TIME setting (shown in heavylines) depict the IEC-C response. The Instantaneous, shown as a separateresponse, can be set to OFF.
2. Curve Equation:2
Trip = TimeDial *[ 80.0/ (I - 1)], where I is a multiple of I .rFor current > 1.2xI tolerance is [15%] or [-15%, +90 ms], whichever is larger.rTimeDial curve goes to flat response at 14xI with a shorter time of TimeDialrfunction or SHORT TIME function prevailing if curves overlap. The ShortTimefunction and the TimeDial function act independently and the entire TimeDialcurves continue to be active even after the curves intersect.
3. The actual pick up point (indicated by rapid flashing of Unit Status LED on theproduct) occurs at 110% of the I , current, with a 10% tolerance. The SHORTrPU 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 onlyTolerance 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 -20C to +55C ambient; temperatures above 85C causeautomatic trip.
7. Minimum persistence refers to the time at which the breaker will not trip for agiven setting.
8. The curves are comprehensive for Series NRX NF and RF frame circuitbreakers including all frame sizes, ratings, and constructions. The totalclearing times shown include the response time for the trip unit, thebreaker opening and the interruption of the current.
Adjustable SHORT TIME0.10s to 0.50s
With 0.05 incrementsSee Note 5
0.20
TimeinSeconds
2000
3000
4000
5000
6000
7000
8000
10000
1000
30
40
50
80
70
60
90
20
9000
900800
700
600
500
400
300
200
100
109
87
6
5
4
3
2
1
.9
.09
.08
.07
.6
.5
.4
.3
.2
.1
.8
.7
.06
.05
.04
.03
.02
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Series NRX - Type NF Frame with Digitrip1150 / 1150i - Instantaneous Curve
2
60
70
80
90
100
1000
900
800
700
600
500
400
300
200
2000
3000
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7000
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.02
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.06
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.2
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TIMEIN
SECONDS
1 2
3 4.
5.
6 .7
.8 .
9
10
205
6
7
8
9
Available AdjustableInstantaneous
Setting 2 to 12x I 10%n(See Notes 4, 6)
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 thecircuit 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 onthis chart
4. The Instantaneous settings have conventional 100% 10% as the pickuppoints.
5. Total clearing times shown include the response times of the trip unit, thebreaker opening and the interruption of the current.
6. An additional, fixed High Instantaneous Trip function is provided in thecircuit breaker set to pickup at 90kA Instantaneous peak current level.
This protection is functional evenwhen 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, andthe interruption of the current under factors that contribute to worst caseconditions, like: maximum rated voltages, single phase interruption, andminimum power factor. Faster clearing times are possible depending on thespecific system conditions, the type of circuit breaker applied, and if any arcreduction settings are employed. Contact Eaton Corporation for additionalInformation.
Thecircuit breakers Short Delay rating is marked according to Test Standardswith a 42kA current value.
30
40
50
3
4
6
8
10
HighInstantaneous(See Note 6)
.02
.03
.04
.05
.06
.07
.08
.09
.1
.2
.3
.4
.5
.6
.7
.8
.9
1
T
IMEIN
SECONDS
2
60
70
80
90
100
1000
900
800
700
600
500
400
300
200
2000
3000
4000
5000
6000
7000
8000
9000
10000
3
4
5
6
78
9
10
20
30
40
501MINUTE
2HOURS
1HOUR
2
12
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Series NRX - Type RF Frame with Digitrip1150 / 1150i - Instantaneous Curve
2
60
70
80
90
100
1000
900
800
700
600
500
400
300
200
2000
3000
4000
5000
6000
7000
8000
9000
10000
.02
.03
.04
.05
.06
.07
.08
.09
.1
.2
.3
.4
.5
.6
.7
.8
.9
1
3
4
5
6
78
9
10
20
30
40
50
TIMEIN
SECONDS
1 2
3 4.
5.
6 .7
.8 .
9
10
205
6
7
8
9
Available AdjustableInstantaneous
Setting 2 to 12x I 10%n(See Notes 2, 3)
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 thecircuit 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 pickuppoints.
4. On the RF Frame, an additional, fixed High Instantaneous Trip function isprovided in the circuit breaker.
This protection isfunctional 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, andthe interruption of the current under factors that contribute to worst caseconditions, like: maximum rated voltages, single phase interruption, andminimum power factor. Faster clearing times are possible depending on thespecific system conditions, the type of circuit breaker applied, and if any arcreduction settings are employed. Contact Eaton Corporation for additionalInformation.
The circuit breakers Short Delay rating ismarked according to Test Standards with a preset value.
30
40
50
3
4
6
8
10
.02
.03
.04
.05
.06
.07
.08
.09
.1
.2
.3
.4
.5
.6
.7
.8
.9
1
T
IMEIN
SECONDS
2
60
70
80
90
100
1000
900
800
700
600
500
400
300
200
2000
3000
4000
5000
6000
7000
8000
9000
10000
3
4
5
6
78
9
10
20
30
40
501MINUTE
2HOURS
1HOUR
2
12
HighInstantaneous
RF Frame ONLY(See Notes 4 & 5)
6 5k A 8 5k A
100kA See Note 1
See Note 1
65kA85kA
100kA
SymmetricalRMS Current
Inst PeakAsymmetrical
65kA85kA
100kA
138kA140kA212kA
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2
60
70
80
90
100
1000
900
800
700
600
500
400
300
200
2000
3000
4000
5000
6000
7000
8000
9000
10000
.02
.03
.04
.05
.06
.07
.08
.09
.1
.2
.3
.4
.5
.6
.7
.8
.9
1
3
4
5
6
78
9
10
20
30
40
50
TIMEIN
SECONDS
4.0
1 2 3 4.5 .6 .7 .8 .9
10
205
6
7
8
9
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 unitkeypad, 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 thecircuit breaker.
4. The Digitrip 1150ARM will light the Instantaneous LED for aMaintenance Mode Trip.
5. Nominal Reduction Values have a tolerance of 15%
6. The total 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 worstcase conditions, like: maximum rated voltages, single phaseinterruption, and minimum power factor. Faster clearing times arepossible depending on the specific system conditions, and the type of
NRX Circuit Breaker applied.
Contact Eaton Electrical for additional information.
See Note 2
Maximum AvailableArc Flash
Reduction Setting1.0kA
5.0
2.0
3.0
1.0
Minimum AvailableArc Flash
Reduction Setting5.0kA
Series NRX Type NF Frame using Digitrip 1150 /1150iwith Maintenance Mode Trip
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Series NRX Type RF Frame using Digitrip 1150 /1150iwith Maintenance Mode Trip
2
60
70
80
90
100
1000
900
800
700
600
500
400
300
200
2000
3000
4000
5000
6000
7000
8000
9000
10000
.02
.03
.04
.05
.06
.07
.08
.09
.1
.2
.3
.4
.5
.6
.7
.8
.9
1
3
4
5
6
78
9
10
20
30
40
50
TIMEIN
SECONDS
16.0
1 2 3 4.5 .6 .7 .8 .9
10
205
6
7
8
9
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 unitkeypad, 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 thecircuit breaker.
4. The Digitrip 1150ARM will light the Instantaneous LED for aMaintenance Mode Trip.
5. Nominal Reduction Values have a tolerance of 15%
6. The total 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 worstcase conditions, like: maximum rated voltages, single phaseinterruption, and minimum power factor. Faster clearing times arepossible depending on the specific system conditions, and the type of
NRX Circuit Breaker applied.
Contact Eaton Electrical for additional information.
See Note 2
Maximum AvailableArc Flash
Reduction Setting4.0kA
20.0
Minimum AvailableArc Flash
Reduction Setting20.0kA
12.0
8.0
4.0
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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%nwith steps of 0.01.
See Note 5
Available FLAT responseGROUND TIME
0.1 to 0.5 secondswith 0.05s increments
FLAT response forGROUND TIME
See Note 7
See Notes 6, 7
Series NRX - Type NF and RF Frame with Digitrip 1150 / 1150i - Ground (Earth) Curve
Series NRX - Type NF and RF Frame Circuit Breakers2
Response: 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. TheDigitrip 1150iunit only has a minimum Earth Pickup setting starting at 0.1 x I .n
6. Ground Slope: FLATTolerance is +0 / -80 ms except
0.10s setting band is 0.05 to 0.130.15s setting band is 0.09 to 0.17
27. Ground Slope: I T
2I T slope flattens out at 0.625x I for top of band with FLAT time minimum valuenprevailing for bottom of band.
2Curve Trip Equation: Trip = (GROUND TIME) x 0.39 / I (top band)n
2 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 except0.10s 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 timesshown include the response time for the trip unit, the breaker opening and theinterruption of the current.
Circuit Breaker Time/Current Curves (Ground Current)
0.50s0.50s
0.10s
Break point @ 0.625x I toFLATn
TIMEI N
SECON
DS
1
2
3
.02
.08
.09
.05
.04
.03
.07
.06
.1
.2
.8
.9
.5
.4
.3
.7
.6
500
10
20
8000
9000
10000
800
900
400
4000
2000
600
3000
1000
700
5000
6000
7000
8
9
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 9
10
20
30
40
50
60
2Available I T Response
GROUND TIME0.1 to 0.5 seconds
with 0 01s increments
Min Persistencefor 0.1s setting
Max Clearing Time
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effective August 20
Disclaimer of warranties and limitation of liability
The information, recommendations, descriptions, and safety
notations in this document are based on Eaton Corporations
(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 Corporation
Electrical 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 registeredtrademark of Eaton Corporation.
All other trademarks are property of theirrespective owners.
Application DataAD0130100Characteristic Curves for Series NRX
Type NF and RF Frame with Digitrip
1150 Trip Unit
Data 1301005E effective July 2011 Series NRX