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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


IEEE Very Inverse, Short Delay Flat Time-Phase Current Characteristic Curve based on I

rfor Series


IEEE Extremely Inverse, Short Delay Flat Time-Phase Current Characteristic Curve based on Ir

for Series


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


IEC-C Extremely Inverse, Short Delay Flat Time-Phase Current Characteristic Curve based on Ir

for


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


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

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3000

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5000

6000

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8

9

5

4

30

7

6

100

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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


Minimum persistenceSee Notes 5, 7

Adjustable SHORT PU2.0x to 10x Ir

With 0.5 incrementsSee Note 3


With0.05 increments

See Note 5

Adjustable TimeDialSetting 0.10 to 5.00



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


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






AdjustableSHORT TIME0.10s to 0.50sWith 0.050sincrementsSee Note 5


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.






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


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







With 0.10 increments

See Note 2


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.







[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


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



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.





Minimum persistence

See Notes 5, 7



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

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70

80

90

100

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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









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.





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.



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









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.



6. Curve applies from -20C to +55C ambient; temperatures above 85C causeautomatic trip.



Adjustable SHORT TIME0.10s to 0.50s


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

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 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:


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:


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

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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

8/3/2019 Ad 01301005 Eh 02

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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.


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


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.


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


20.0

Minimum AvailableArc Flash


12.0

8.0

4.0

8/3/2019 Ad 01301005 Eh 02

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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

8/3/2019 Ad 01301005 Eh 02

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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


1150 Trip Unit

Data 1301005E effective July 2011 Series NRX

ad 01301005 eh 02

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