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  3. RT316036B22

Eaton RT316036B22 Operating instructions

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Time Current Curves TD012029EN Effective February 2016
Contents
Series G NG-Frame
Digitrip 310+ Electronic Trip Unit types NGS, NGH, NGC, NGU Page
Catalog Number Selection .....................................................................3
Long Delay Response and Short Delay with Flat Response and Override
(LSI, LSIG, ALSI, ALSIG) ................................................. TC01210010E ........4
Long Delay Response and Short Delay with I2T Response Curve and Override (LS, LSG) TC01210011E.........5
Ground Fault Delay Response Curve (LSG, LSIG, ALSIG) ......................... TC01210012E ........6
Maintentance Mode / Instantaneous Setting (ALSI, ALSIG) ....................... TC01210016E ........7
Digitrip OPTIM 550 Trip Unit type NHH High Instantaneous
Long Delay I2T and Short Delay Flat ......................................... TC01207016E ........8
Long Delay I4T and Short Delay Flat.......................................... TC01207017E ........9
Instantaneous and Override ............................................... TC01207018E .......10
Digitrip 310 Electronic Trip Units
Eaton/Cutler-Hammer NG_ _ _ _T_ _W Electronic LD and SD with I2T Response .......TC01209003E .......11
Eaton/Cutler-Hammer NG_ _ _ _T_ _W Electronic LD and SD with Flat Response .....TC01209004E .......12
Eaton/Cutler-Hammer NG_ _ _ _T_ _W Electronic LD and SD with Flat Response (1600A) TC01209006E .......13
Series C ND-Frame
Catalog Number Selection ....................................................................14
NES Digitrip RMS 310 Electronic Trip Unit types ND, CND, HND, CHND, NDC, CNDC
I2T Ramp Short Time Delay ................................................ SC-5375-92A........15
Adjustable Short Time Delay ................................................SC-5376-92A........16
Ground Fault Protection ................................................... SC-5377-92A .......17
Digitrip OPTIM 550 & 1050 Electronic Trip unit types ND, HND, NDC
Long Delay I2T, Short Delay I2T ..............................................SC-6331-96 ........18
Long Delay I2T, Short Delay Flat ..............................................SC-6332-96 ........19
Long Delay I4T, Short Delay Flat .............................................SC-6333-96 ........20
Instantaneous and Override .................................................SC-6334-96 ........21
Ground Fault Protection ....................................................SC-6335-96 ........22
Note:
The following curves meet the requirements of UL, CSA, IEC, CCC and CE.
The following circuit breakers are derived from Eaton, Westinghouse, or Cutler-Hammer history.
Time Current Curves are engineering reference documents for application and coordination purposes only.
NG/ND-Frames
320-1600A, 240-690V
Proof 4 — March 20, 2016 11:29 PM
2
Time Current Curves AD012020EN
Effective October 2013
Series G
L-Frame
eaton www.eaton.com
ote:N Unless noted below, all curves remain unchanged from their prior revision.
Revision Curve Number Page Date
2
Time Current Curves TD012029EN
Effective February 2016
NG/ND-Frames
EATON www.eaton.com
Changed KAIC from 50 to 65 on page 3
ZSI times added to short delay curves.
Combined NG and ND frames into one document.
4 & 5 2/2016
Proof 4 — March 20, 2016 11:29 PM
3
Time Current Curves TD012029EN
Effective February 2016
NG/ND-Frames
EATON www.eaton.com
STATUS
TEST / ALARM
6646 C05
E
G
F
H
A
B
D
C
IR∑
.8 1.0
.2
.3
.6
.4
Ig (xIn)
GND 120
300Inst.
tg (ms)
GND
6
8
7
2
3
5
4
9
Isd (xIR)
SHORT
9
tR (s)
LONG
LSG
STATUS
TEST / ALARM
6646 C05 H11
E
G
F
H
A
B
D
C
IR∑
6
8
7
2
3
5
4
9
Isd (xIR)
SHORT
9
tR (s)
LONG
LS
STATUS
TEST / ALARM
tg (ms)
tsd
(ms)
120
K
N
Q
300
L
O
R
*Inst.
J
M
P
Inst.
120
300
Settings
6646 C05
E
G
F
H
A
B
D
C
IR∑
.8 1.0
.2
.3
.6
.4
Ig (xIn)
GND N
P
O
Q
J
K
M
L
R
sd
*
/
tt
g (ms)
SHORT / GND
6
8
7
2
3
5
4
9
Isd (xIR)
SHORT
9
tR (s)
LONG
LSIG
STATUS
TEST / ALARM
6646 C05
E
G
F
H
A
B
D
C
IR∑
120
300Inst.
tsd (ms)
SHORT
6
8
7
2
3
5
4
9
Isd (xIR)
SHORT
9
tR (s)
LONG
LSI
STATUS
TEST / ALARM
tg (ms)
tsd
(ms)
120
K
N
Q
300
L
O
R
* 50
J
M
P
50
120
300
Settings
6646 C05
E
G
F
H
A
B
D
C
IR∑
.8 1.0
.2
.3
.6
.4
Ig (xIn)
GND N
P
O
Q
J
K
M
L
R
sd
*
/
tt
g (ms)
SHORT / GND
6
8
7
2
3
5
4
9
Isd (xIR)
SHORT
9
tR (s)
LONG
ALSIG (With Maintenance Mode)
8
2.5
7
6
Ii (xIn)
INST
4
Maintenance Mode
Push to Trip
Remote MM
6646 C06
STATUS
TEST / ALARM
6646 C05
E
G
F
H
A
B
D
C
IR∑
120
30050
tsd (ms)
SHORT
6
8
7
2
3
5
4
9
Isd (xIR)
SHORT
9
tR (s)
LONG
ALSI (With Maintenance Mode)
8
2.5
7
6
Ii (xIn)
INST
4
Maintenance Mode
Push to Trip
Remote MM
6646 C06
NG H 3 080 39 ZG E C
Frame
NG
Amperes
080 = 800
120
125
160
= 120
= 1250
= 1600
Rating
Blank = 80% rated
C = 100% rated
Feature
Terminations
M = Metric tapped line/load
conductors
E = Imperial tapped line/load
conductors
Trip Unit
33
32
35
35B22
36
36B22
38
39
39B22
= 310+ Electronic LS
= 310+ Electronic LSI
= 310+ Electronic LSG
= 310+ Electronic LS(A), GFA, no trip
= 310+ Electronic LSIG
= 310+ Electronic LSI(A), GFA, no trip
= 310+ Electronic ALSI
with Maintenance Mode
= 310+ Electronic ALSIG
with Maintenance Mode
= 310+ Electronic ALSI(A)
with Maintenance Mode and GFA, no trip
Poles
3 = Three
4
7
9
= Four; neutral
0% protected
= Four; neutral
100% protected
= Four; neutral
0/60/100% adjustable
protection
Blank
B20
B21
ZG
= No feature
= High load alarm
= Ground fault
= Zone selective interlocking
Performance
600 480 415 240
S25 50 50 85
H35 65 70 100
C65 100100 200
U65 150 150 200
Notes
1 800A only.
2 Neutral inn left pole on GN;
right pole on NG.
3 Breakers do not ship with lugs.
4 IEC Only
Trip units are factory installable only.
2
2
2
3
4
4
1
Table 1. Series G N–Frame (320-1600A)
Catalog Number Selection
This information is presented only as an aid to understanding catalog numbers.
It is not to be used to build catalog numbers for circuit breakers or trip units.
Figure 1. Digitrip 310+ Faceplates
Proof 4 — March 20, 2016 11:29 PM
0.01
2
0.02
0.03
0.04
0.05
0.06
0.07
0.08
0.09
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
3
4
5
6
7
8
9
10
20
30
40
50
60
70
80
90
1000
900
800
700
600
300
200
2000
3000
4000
5000
6000
7000
8000
9000
10000
0.01
0.02
0.03
0.04
0.05
0.06
0.07
0.08
0.09
0.1
0.2
0.3
0.4
0.5
Maximum Total
Clearing Time
Available Long Delay Time
(For 1200A Only):
2, 4, 7, 10, 12, 15, 20, 24 Sec.
Shown at 6xI
2, 4, 7, 15, 24
Seconds +0/–30%
(See Chart )
r
2 3 4 5710 20 30 40 50 70 100 2 4 5710 20 30 40 50 70 100
0.5 0.7
12 3 4 5710 20 30
0.5 0.7
Minimum Total
Clearing Time
4
.
15
.
24
1.15
14400A
Application Determines
End of Curve
Instantaneous
Override (See Note 8)
.
.
300 ms
(P, Q, R)
120 ms
(M, N, O)
Inst.
(J, K, L)
Available Short Delay
Pickup Settings
2–8, 9 x I + 5%
(See Note 7)
.
12
12
r
1 Hour 2 Hours
7
2
9
6
4
3
5
2
7
500
400
100
1 Minute
Time in Seconds
Current in Multiples of (I )
rCurrent in 1000A Increments
3
Time in Seconds
Current in Multiples of ( )
r
I
Adjustable Flat Trip Style (LSI, LSIG, ALSI, ALSIG)
8
Digitrip 310+ Circuit Breaker Time/Current Curves (Phase Current)
Series G N-Frame Circuit Breakers
Long Delay Response and Short Delay with Flat Response and Override
Catalog Types: NGS, NGH, NGC, NGU, GNS, GNH, GNC, and GNU circuit breakers, three- and four-pole
Trip Unit Type: 32 (LSI), 36 (LSIG), 38 (ALSI), 39 (ALSIG)
Notes:
1. Curve accuracy applies from –20°C to +55°C ambient. For possible continuous ampere derating for
ambient above 40°C, refer to Eaton. Temperatures above +85°C cause an over-temperature protection
trip.
2. Application frequency is 50/60 Hz.
3. There is a memory effect that can act to shorten the Long Delay. If the breaker trips on a Long Delay
overload and is quickly reset, the memory capacitor will still have charge and a subsequent overload
will cause the breaker to trip in a shorter time than normal. The amount of time delay reduction is
inverse to the amount of time that has elapsed since the previous overload. Approximately five
minutes is required between overloads to completely reset memory.
4. The right portion of the curve is determined by the interrupting rating of the circuit breaker.
5. The left portion of the curve is shown as a multiple of the Long Delay Setting.
(Long Delay Pickup = 115% of Ir ). Range is 110–120%.
6. Total clearing times shown include the response times of the trip unit, the breaker opening,
and the interruption of the current.
7. The Short Delay Pickup has nine settings/positions, 2–8; the last two switch positions are
the same: 9X.
8. For high fault current levels, an additional fixed instantaneous hardware override is provided to trip
the breaker at 14400A. Instantaneous tolerance is +/- 20%. For the 1600A frame only, if Ir is set to
the maximum (position H) and SDPU is set to the maximum (position 9), then the SDPU setting and
the Instantaneous Override are set to the same value. The Instantaneous Override has precedence
over SDPU. Therefore, the breaker will trip on Instantaneous Override.
Available Sensors
(Ir) / (In)
Rated Amperes
800A 1200A 1250A 1600A
A
B
C
D
E
F
G
H
320A 500A 500A 630A
400A 600A 630A 630A
450A 630A 700A 700A
500A 700A 800A 800A
600A 800A 900A 900A
630A 900A 1000A 1000A
700A 1000A 1200A 1250A
800A 1200A 1250A 1600A
STATUS
TEST / ALARM
6646 C05
E
G
F
H
A
B
D
C
IR∑
120
300Inst.
tsd (ms)
SHORT
6
8
7
2
3
5
4
9
Isd (xIR)
SHORT
9
tR (s)
LONG
LSI
STATUS
TEST / ALARM
tg (ms)
tsd
(ms)
120
K
N
Q
300
L
O
R
*Inst.
J
M
P
Inst.
120
300
Settings
6646 C05
E
G
F
H
A
B
D
C
IR∑
.8 1.0
.2
.3
.6
.4
Ig (xIn)
GND N
P
O
Q
J
K
M
L
R
sd
*
/
t tg (ms)
SHORT / GND
6
8
7
2
3
5
4
9
Isd (xIR)
SHORT
9
tR (s)
LONG
LSIG
STATUS
TEST / ALARM
6646 C05
E
G
F
H
A
B
D
C
IR∑
120
30050
tsd (ms)
SHORT
6
8
7
2
3
5
4
9
Isd (xIR)
SHORT
9
tR (s)
LONG
ALSI (With Maintenance Mode)
8
2.5
7
6
Ii (xIn)
INST
4
Maintenance Mode
Push to Trip
Remote MM
6646 C06
STATUS
TEST / ALARM
tg (ms)
tsd
(ms)
120
K
N
Q
300
L
O
R
* 50
J
M
P
50
120
300
Settings
6646 C05
E
G
F
H
A
B
D
C
IR∑
.8 1.0
.2
.3
.6
.4
Ig (xIn)
GND N
P
O
Q
J
K
M
L
R
sd
*
/
t tg (ms)
SHORT / GND
6
8
7
2
3
5
4
9
Isd (xIR)
SHORT
9
tR (s)
LONG
ALSIG (With Maintenance Mode)
8
2.5
7
6
Ii (xIn)
INST
4
Maintenance Mode
Push to Trip
Remote MM
6646 C06
4
Time Current Curves TD012029EN
Effective February 2016
NG/ND-Frames
EATON www.eaton.com
0.01
2
0.02
0.03
0.04
0.05
0.06
0.07
0.08
0.09
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
3
4
5
6
7
8
9
10
20
30
40
50
60
70
80
90
100
1000
900
800
700
600
500
400
300
200
2000
3000
4000
5000
6000
7000
8000
9000
10000
0.01
0.02
0.03
0.04
0.05
0.06
0.07
0.08
0.09
0.1
0.2
0.3
Maximum Total
Clearing Time
I
r
Application Determines
End of Curve
Instantaneous
Override (See Note 10)
12 3 4 5710 20 30 40 50 70 100 2 3 4 5710 20 30 40 50 70 100
0.5 0.7
12 3 4 5710 20 30
0.5 0.7
Minimum Total
Clearing Time
2
I T Short Delay
(See Note 8)
.
.
.
1.15
14400A
67 ms
Available Short Delay
Pickup Settings
2–8, 9 x I + 5%
(See Notes 7 and 10)
r
12
12
See Note 9
.
.
.
Available Long Delay Time
(For 1200A Only):
2, 4, 7, 10, 12, 15, 20, 24 Sec.
Shown at 6x
2, 4, 7, 15, 24
Seconds +0/–30%
(See Chart) )
24
15
7
4
2
3
4
5
7
9
6
2
Current Multiples of (I )
r
2 Hours1 Hour
1 Minute
Time in Seconds
Time in Seconds
Current in Multiples of (I )
rCurrent in 1000A Increments
I2T Trip Style (LS and LSG)
8
Digitrip 310+ Circuit Breaker Time/Current Curves (Phase Current)
Series G N-Frame Circuit Breakers
Long Delay Response and Short Delay with I2T Response Curve and Override
Catalog Types: NGS, NGH, NGC, NGU, GNS, GNH, GNC, and GNU circuit breakers, three- and four-pole
Trip Unit Type: 33 (LS), 35 (LSG)
Notes:
1. Curve accuracy applies from –20°C to +55°C ambient. For possible continuous ampere derating for
ambient above 40°C, refer to Eaton. Temperatures above +85°C cause an over-temperature protection
trip.
2. Application frequency is 50/60 Hz.
3. There is a memory effect that can act to shorten the Long Delay. If the breaker trips on a Long Delay
overload and is quickly reset, the memory capacitor will still have charge and a subsequent overload
will cause the breaker to trip in a shorter time than normal. The amount of time delay reduction is
inverse to the amount of time that has elapsed since the previous overload. Approximately five
minutes is required between overloads to completely reset memory.
4. The right portion of the curve is determined by the interrupting rating of the circuit breaker.
5. The left portion of the curve is shown as a multiple of the Long Delay Setting.
(Long Delay Pickup = 115% of Ir ). Range is 110–120%.
6. Total clearing times shown include the response times of the trip unit, the breaker opening,
and the interruption of the current.
7. The Short Delay Pickup has nine settings/positions, 2–8; the last two switch positions are
the same: 9X.
8. Short Delay I2 T band has a tolerance of +15%.
9. Breakpoint back to FLAT response occurs @ 8x Ir for upper line of the I2 T curve.
10. For high fault current levels, an additional fixed instantaneous hardware override is provided to trip the
breaker at 14400A. Instantaneous tolerance is +/- 20%. For the 1600A frame only, if Ir is set to the
maximum (position H) and SDPU is set to the maximum (position 9), then the SDPU setting and the
Instantaneous Override are set to the same value. The Instantaneous Override has precedence over
SDPU. Therefore, the breaker will trip on Instantaneous Override.
Available Sensors
(Ir) / (In)
Rated Amperes
800A 1200A 1250A 1600A
A
B
C
D
E
F
G
H
320A 500A 500A 630A
400A 600A 630A 630A
450A 630A 700A 700A
500A 700A 800A 800A
600A 800A 900A 900A
630A 900A 1000A 1000A
700A 1000A 1200A 1250A
800A 1200A 1250A 1600A
STATUS
TEST / ALARM
6646 C05 H11
E
G
F
H
A
B
D
C
I
R∑
6
8
7
2
3
5
4
9
I
sd (xI
R
)
SHORT
9
t
R
(s)
LONG
LS
STATUS
TEST / ALARM
6646 C05
E
G
F
H
A
B
D
C
IR∑
.8 1.0
.2
.3
.6
.4
Ig (xIn)
GND 120
300Inst.
tg (ms)
GND
6
8
7
2
3
5
4
9
Isd (xIR)
SHORT
9
tR (s)
LONG
LSG
Figure 2. Digitrip 310+ Long Delay Response and Short Delay with Flat Response and Override Curve (LSI, LSIG, ALSI, ALSIG) -
Curve Number TC01210010E, March 2012
Digitrip 310+ Circuit Breaker Time/Current Curves (Phase Current)
Series G N-Frame Circuit Breakers
Long Delay Response and Short Delay with Flat Response and Override
Catalog Types: NGS, NGH, NGC, NGU, GNS, GNH, GNC, and GNU circuit breakers, three- and four-pole
Trip Unit Type: 32 (LSI), 36 (LSIG), 38 (ALSI), 39 (ALSIG)
Notes:
1. Curve accuracy applies from –20°C to +55°C ambient. For possible continuous ampere derating for
ambient above 40°C, refer to Eaton. Temperatures above +85°C cause an over-temperature protection
trip.
2. Application frequency is 50/60 Hz.
3. There is a memory effect that can act to shorten the Long Delay. If the breaker trips on a Long Delay
overload and is quickly reset, the memory capacitor will still have charge and a subsequent overload
will cause the breaker to trip in a shorter time than normal. The amount of time delay reduction is
inverse to the amount of time that has elapsed since the previous overload. Approximately ve
minutes is required between overloads to completely reset memory.
4. The right portion of the curve is determined by the interrupting rating of the circuit breaker.
5. The left portion of the curve is shown as a multiple of the Long Delay Setting.
(Long Delay Pickup = 115% of Ir ). Range is 110–120%.
6. Total clearing times shown include the response times of the trip unit, the breaker opening,
and the interruption of the current.
7. The Short Delay Pickup has nine settings/positions, 2–8; the last two switch positions are
the same: 9X.
8. For high fault current levels, an additional xed instantaneous hardware override is provided to trip
the breaker at 14400A. Instantaneous tolerance is +/- 20%. For the 1600A frame only, if Ir is set to
the maximum (position H) and SDPU is set to the maximum (position 9), then the SDPU setting and
the Instantaneous Override are set to the same value. The Instantaneous Override has precedence
over SDPU. Therefore, the breaker will trip on Instantaneous Override.
9. Maximum clearing time when using zone selective interlocking is 62ms.
Available Sensors
(Ir) / (In)
Rated Amperes
800A 1200A 1250A 1600A
A
B
C
D
E
F
G
H
320A 500A 500A 630A
400A 600A 630A 630A
450A 630A 700A 700A
500A 700A 800A 800A
600A 800A 900A 900A
630A 900A 1000A 1000A
700A 1000A 1200A 1250A
800A 1200A 1250A 1600A
STATUS
TEST / ALARM
6646 C05
E
G
F
H
A
B
D
C
IR∑
120
300Inst.
tsd (ms)
SHORT
6
8
7
2
3
5
4
9
Isd (xIR)
SHORT
9
tR (s)
LONG
LSI
STATUS
TEST / ALARM
tg (ms)
tsd
(ms)
120
K
N
Q
300
L
O
R
*Inst.
J
M
P
Inst.
120
300
Settings
6646 C05
E
G
F
H
A
B
D
C
IR∑
.8 1.0
.2
.3
.6
.4
Ig (xIn)
GND N
P
O
Q
J
K
M
L
R
sd
*
/
tt
g (ms)
SHORT / GND
6
8
7
2
3
5
4
9
Isd (xIR)
SHORT
9
tR (s)
LONG
LSIG
STATUS
TEST / ALARM
6646 C05
E
G
F
H
A
B
D
C
IR∑
120
30050
tsd (ms)
SHORT
6
8
7
2
3
5
4
9
Isd (xIR)
SHORT
9
tR (s)
LONG
ALSI (With Maintenance Mode)
8
2.5
7
6
Ii (xIn)
INST
4
Maintenance Mode
Push to Trip
Remote MM
6646 C06
STATUS
TEST / ALARM
tg (ms)
tsd
(ms)
120
K
N
Q
300
L
O
R
* 50
J
M
P
50
120
300
Settings
6646 C05
E
G
F
H
A
B
D
C
IR∑
.8 1.0
.2
.3
.6
.4
Ig (xIn)
GND N
P
O
Q
J
K
M
L
R
sd
*
/
tt
g (ms)
SHORT / GND
6
8
7
2
3
5
4
9
Isd (xIR)
SHORT
9
tR (s)
LONG
ALSIG (With Maintenance Mode)
8
2.5
7
6
Ii (xIn)
INST
4
Maintenance Mode
Push to Trip
Remote MM
6646 C06
Long Delay Time Settings +0%/ -30% (seconds)
800A
1200A
1250A
1600A
2 4 6 8 10 12 14 14
2 4 7 10 12 15 20 24
2 4 6 8 10 12 14 14
2 4 7 10 12 15 20 20
Proof 4 — March 20, 2016 11:29 PM
5
Time Current Curves TD012029EN
Effective February 2016
NG/ND-Frames
EATON www.eaton.com
0.01
2
0.02
0.03
0.04
0.05
0.06
0.07
0.08
0.09
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
3
4
5
6
7
8
9
10
20
30
40
50
60
70
80
90
100
1000
900
800
700
600
500
400
300
200
2000
3000
4000
5000
6000
7000
8000
9000
10000
0.01
0.02
0.03
0.04
0.05
0.06
0.07
0.08
0.09
0.1
0.2
0.3
Maximum Total
Clearing Time
I
r
Application Determines
End of Curve
Instantaneous
Override (See Note 10)
12 3 4 5710 20 30 40 50 70 100 2 3 4 5710 20 30 40 50 70 100
0.5 0.7
12 3 4 5710 20 30
0.5 0.7
Minimum Total
Clearing Time
2
I T Short Delay
(See Note 8)
.
.
.
1.15
14400A
67 ms
Available Short Delay
Pickup Settings
2–8, 9 x I + 5%
(See Notes 7 and 10)
r
12
12
See Note 9
.
.
.
Available Long Delay Time
(For 1200A Only):
2, 4, 7, 10, 12, 15, 20, 24 Sec.
Shown at 6x
2, 4, 7, 15, 24
Seconds +0/–30%
(See Chart) )
24
15
7
4
2
3
4
5
7
9
6
2
Current Multiples of (I )
r
2 Hours1 Hour
1 Minute
Time in Seconds
Time in Seconds
Current in Multiples of (I )
rCurrent in 1000A Increments
I2T Trip Style (LS and LSG)
8
Digitrip 310+ Circuit Breaker Time/Current Curves (Phase Current)
Series G N-Frame Circuit Breakers
Long Delay Response and Short Delay with I2T Response Curve and Override
Catalog Types: NGS, NGH, NGC, NGU, GNS, GNH, GNC, and GNU circuit breakers, three- and four-pole
Trip Unit Type: 33 (LS), 35 (LSG)
Notes:
1. Curve accuracy applies from –20°C to +55°C ambient. For possible continuous ampere derating for
ambient above 40°C, refer to Eaton. Temperatures above +85°C cause an over-temperature protection
trip.
2. Application frequency is 50/60 Hz.
3. There is a memory effect that can act to shorten the Long Delay. If the breaker trips on a Long Delay
overload and is quickly reset, the memory capacitor will still have charge and a subsequent overload
will cause the breaker to trip in a shorter time than normal. The amount of time delay reduction is
inverse to the amount of time that has elapsed since the previous overload. Approximately five
minutes is required between overloads to completely reset memory.
4. The right portion of the curve is determined by the interrupting rating of the circuit breaker.
5. The left portion of the curve is shown as a multiple of the Long Delay Setting.
(Long Delay Pickup = 115% of Ir ). Range is 110–120%.
6. Total clearing times shown include the response times of the trip unit, the breaker opening,
and the interruption of the current.
7. The Short Delay Pickup has nine settings/positions, 2–8; the last two switch positions are
the same: 9X.
8. Short Delay I2 T band has a tolerance of +15%.
9. Breakpoint back to FLAT response occurs @ 8x Ir for upper line of the I2 T curve.
10. For high fault current levels, an additional fixed instantaneous hardware override is provided to trip the
breaker at 14400A. Instantaneous tolerance is +/- 20%. For the 1600A frame only, if Ir is set to the
maximum (position H) and SDPU is set to the maximum (position 9), then the SDPU setting and the
Instantaneous Override are set to the same value. The Instantaneous Override has precedence over
SDPU. Therefore, the breaker will trip on Instantaneous Override.
Available Sensors
(Ir) / (In)
Rated Amperes
800A 1200A 1250A 1600A
A
B
C
D
E
F
G
H
320A 500A 500A 630A
400A 600A 630A 630A
450A 630A 700A 700A
500A 700A 800A 800A
600A 800A 900A 900A
630A 900A 1000A 1000A
700A 1000A 1200A 1250A
800A 1200A 1250A 1600A
STATUS
TEST / ALARM
6646 C05 H11
E
G
F
H
A
B
D
C
I
R∑
6
8
7
2
3
5
4
9
I
sd (xI
R
)
SHORT
9
t
R
(s)
LONG
LS
STATUS
TEST / ALARM
6646 C05
E
G
F
H
A
B
D
C
IR∑
.8 1.0
.2
.3
.6
.4
Ig (xIn)
GND 120
300Inst.
tg (ms)
GND
6
8
7
2
3
5
4
9
Isd (xIR)
SHORT
9
tR (s)
LONG
LSG
Figure 3. Digitrip 310+ Long Delay Response and Short delay with I2T Response Curve (LS, LSG) - Curve Number TC01210011E,
March 2012
Digitrip 310+ Circuit Breaker Time/Current Curves (Phase Current)
Series G N-Frame Circuit Breakers
Long Delay Response and Short Delay with I2T Response Curve and Override
Catalog Types: NGS, NGH, NGC, NGU, GNS, GNH, GNC, and GNU circuit breakers, three- and four-pole
Trip Unit Type: 33 (LS), 35 (LSG)
Notes:
1. Curve accuracy applies from –20°C to +55°C ambient. For possible continuous ampere derating for
ambient above 40°C, refer to Eaton. Temperatures above +85°C cause an over-temperature protection
trip.
2. Application frequency is 50/60 Hz.
3. There is a memory effect that can act to shorten the Long Delay. If the breaker trips on a Long Delay
overload and is quickly reset, the memory capacitor will still have charge and a subsequent overload
will cause the breaker to trip in a shorter time than normal. The amount of time delay reduction is
inverse to the amount of time that has elapsed since the previous overload. Approximately ve
minutes is required between overloads to completely reset memory.
4. The right portion of the curve is determined by the interrupting rating of the circuit breaker.
5. The left portion of the curve is shown as a multiple of the Long Delay Setting.
(Long Delay Pickup = 115% of Ir ). Range is 110–120%.
6. Total clearing times shown include the response times of the trip unit, the breaker opening,
and the interruption of the current.
7. The Short Delay Pickup has nine settings/positions, 2–8; the last two switch positions are
the same: 9X.
8. Short Delay I2 T band has a tolerance of +15%.
9. Breakpoint back to FLAT response occurs @ 8x Ir for upper line of the I2 T curve.
10. For high fault current levels, an additional xed instantaneous hardware override is provided to trip the
breaker at 14400A. Instantaneous tolerance is +/- 20%. For the 1600A frame only, if Ir is set to the
maximum (position H) and SDPU is set to the maximum (position 9), then the SDPU setting and the
Instantaneous Override are set to the same value. The Instantaneous Override has precedence over
SDPU. Therefore, the breaker will trip on Instantaneous Override.
11. Maximum clearing time when using zone selective interlocking is 62ms.
Available Sensors
(Ir) / (In)
Rated Amperes
800A 1200A 1250A 1600A
A
B
C
D
E
F
G
H
320A 500A 500A 630A
400A 600A 630A 630A
450A 630A 700A 700A
500A 700A 800A 800A
600A 800A 900A 900A
630A 900A 1000A 1000A
700A 1000A 1200A 1250A
800A 1200A 1250A 1600A
STATUS
TEST / ALARM
6646 C05 H11
E
G
F
H
A
B
D
C
IR∑
6
8
7
2
3
5
4
9
Isd (xIR)
SHORT
9
tR (s)
LONG
LS
STATUS
TEST / ALARM
6646 C05
E
G
F
H
A
B
D
C
IR∑
.8 1.0
.2
.3
.6
.4
Ig (xIn)
GND 120
300Inst.
tg (ms)
GND
6
8
7
2
3
5
4
9
Isd (xIR)
SHORT
9
tR (s)
LONG
LSG
Long Delay Time Settings +0%/ -30% (seconds)
800A
1200A
1250A
1600A
2 4 6 8 10 12 14 14
2 4 7 10 12 15 20 24
2 4 6 8 10 12 14 14
2 4 7 10 12 15 20 20
Proof 4 — March 20, 2016 11:29 PM
6
Time Current Curves TD012029EN
Effective February 2016
NG/ND-Frames
EATON www.eaton.com
0.01
2
3
4
5
6
8
10
20
30
40
50
60
70
80
90
100
1000
900
800
700
600
500
400
300
200
0.02
0.03
0.04
0.05
0.06
0.07
0.08
0.09
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
7
9
2000
3000
4000
5000
6000
7000
8000
9000
10000
0.1 0.2 0.3 0.4 0.5 0.7 1.0 2.0
0.1 0.2 0.3 0.4 0.5 0.7 1.0 2.0
Ground Fault Pickup Settings
(Tolerance ±10%)
Inst.
(J, M, P)
120 ms
(K, N, Q)
300 ms
(L, O, R)
0.4X Ig
0.3X Ig
0.2X Ig1X Ig
0.6X Ig
0.8X Ig
Ground Current in Multiples of (I )
n
Time in Seconds 1 Minute
Ig = 800A Frame : 800
1200A Frame : 1200
1250A Frame : 1250
1600A Frame : 1600
0.01
2
0.02
0.03
0.04
0.05
0.06
0.07
0.08
0.09
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
3
4
5
6
7
8
9
10
0.01
2
3
0.02
0.03
0.04
0.05
0.06
0.07
0.08
0.09
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
Maintenance Mode Trip
Instantaneous Mode Trip
2
3
4
5
6
7
8
9
10
1
Application
Determines
End of Curve
Current in Multiples of Ratings (I )
n
Application
Determines
End of Curve
Time in Seconds
Time in Seconds
0.5
0.6
0.7
0.8
0.9
1
4 5 6 7 8 9 10 20 30 40 50 1 10 100
2.5 4.0
7.0
10.0
12.0
6.0 8.0
800A 18x
1200A/1250A 12x
1600A 9x
Last
Instantaneous
Value
Digitrip 310+ Circuit Breaker Time/Current Curves (Ground Current)
Series G N-Frame Circuit Breakers
Ground Fault Delay Response Curve
Catalog Types: NGS, NGH, NGC, NGU, GNS, GNH, GNC, and GNU circuit breakers,
three- and four-pole
Trip Unit Type: 35 (LSG), 36 (LSIG), 39 (ALSIG)
STATUS
TEST / ALARM
6646 C05
E
G
F
H
A
B
D
C
I
R∑
.8 1.0
.2
.3
.6
.4
I
g (xIn)
GND 120
300Inst.
t
g (ms)
GND
6
8
7
2
3
5
4
9
I
sd (xI
R
)
SHORT
9
t
R
(s)
LONG
LSG
STATUS
TEST / ALARM
t
g
(ms)
t
sd
(ms)
120
K
N
Q
300
L
O
R
*
Inst.
J
M
P
Inst.
120
300
Settings
6646 C05
E
G
F
H
A
B
D
C
I
R∑
.8 1.0
.2
.3
.6
.4
I
g (xIn)
GND N
P
O
Q
J
K
M
L
R
sd
*
/
tt
g (ms)
SHORT / GND
6
8
7
2
3
5
4
9
I
sd (xI
R
)
SHORT
9
t
R
(s)
LONG
LSIG
STATUS
TEST / ALARM
tg (ms)
tsd
(ms)
120
K
N
Q
300
L
O
R
* 50
J
M
P
50
120
300
Settings
6646 C05
E
G
F
H
A
B
D
C
IR∑
.8 1.0
.2
.3
.6
.4
Ig (xIn)
GND N
P
O
Q
J
K
M
L
R
sd
*
/
tt
g (ms)
SHORT / GND
6
8
7
2
3
5
4
9
Isd (xIR)
SHORT
9
tR (s)
LONG
ALSIG (With Maintenance Mode)
8
2.5
7
6
Ii (xIn)
INST
4
Maintenance Mode
Push to Trip
Remote MM
6646 C06
t
g (ms)
t
sd
(ms)
120
K
N
Q
300
L
O
R
*Inst.
J
M
P
Inst.
120
300
Settings
Ground Fault Delay Response Notes:
1. Curve accuracy applies from –20°C to +55°C ambient. For possible continuous ampere derating
for ambient above 40°C, refer to Eaton. Temperatures about +85°C cause an overtemperature
protection trip.
2. Application frequency is 50/60 Hz.
3. Trip units are suitable for functional eld testing with test kit style # 70C1056G52.
4. For LD response and SD with at responses curve, see TC01210010E.
5. For LD responses and SD with I2 T response curve, see TC01210011E.
6. For testing information, please contact Eaton.
Note: Refer to table below for variations.
SD/ GF Delay Settings Table
Figure 4. Ground Fault Delay Reponse Curve (LSG, LSIG, ALSIG) Curve Number TC01210012E, March 2012
Proof 4 — March 20, 2016 11:29 PM
7
Time Current Curves TD012029EN
Effective February 2016
NG/ND-Frames
EATON www.eaton.com
0.01
2
0.02
0.03
0.04
0.05
0.06
0.07
0.08
0.09
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
3
4
5
6
7
8
9
10
0.01
2
3
0.02
0.03
0.04
0.05
0.06
0.07
0.08
0.09
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
Maintenance Mode Trip
Instantaneous Mode Trip
2
3
4
5
6
7
8
9
10
1
Application
Determines
End of Curve
Current in Multiples of Ratings (I )
n
Application
Determines
End of Curve
Time in Seconds
Time in Seconds
0.5
0.6
0.7
0.8
0.9
1
4 5 6 7 8 9 10 20 30 40 50 1 10 100
2.5 4.0
7.0
10.0
12.0
6.0 8.0
800A 18x
1200A/1250A 12x
1600A 9x
Last
Instantaneous
Value
Figure 5. Maintenance Mode/Instantaneous Setting (ALSI, ALSIG) Curve Number TC01210016E ,TC01210017E, and TC 01210018E,
March 2012
Digitrip 310+ Circuit Breaker Time/Current Curves
Maintenance Mode/Instantaneous Setting
Series G N-Frame Trip Unit Nameplates
Trip Unit Type: 38 (ALSI), 39 (ALSIG)
STATUS
TEST / ALARM
6646 C05
E
G
F
H
A
B
D
C
IR∑
120
30050
tsd (ms)
SHORT
6
8
7
2
3
5
4
9
Isd (xIR)
SHORT
9
tR (s)
LONG
ALSI (With Maintenance Mode)
8
2.5
7
6
Ii (xIn)
INST
4
Maintenance Mode
Push to Trip
Remote MM
6646 C06
STATUS
TEST / ALARM
tg (ms)
tsd
(ms)
120
K
N
Q
300
L
O
R
* 50
J
M
P
50
120
300
Settings
6646 C05
E
G
F
H
A
B
D
C
IR∑
.8 1.0
.2
.3
.6
.4
Ig (xIn)
GND N
P
O
Q
J
K
M
L
R
sd
*
/
tt
g (ms)
SHORT / GND
6
8
7
2
3
5
4
9
Isd (xIR)
SHORT
9
tR (s)
LONG
ALSIG (With Maintenance Mode)
8
2.5
7
6
Ii (xIn)
INST
4
Maintenance Mode
Push to Trip
Remote MM
6646 C06
Notes:
1. The maintenance mode feature must be ENABLED for these curves to apply. The LED
indicator is blue when in maintenance mode.
2. The end of the curve is determined by the interrupting rating of the circuit breaker.
3. Total clearing times shown include the response times of the trip unit, the breaker
opening, and the interruption of the current.
4. Available pickup settings ( x In) (tolerance is ±15%) 2.5, 4, 6, 7, 8, 10.
5. The Maintenance Mode consists of the two lowest settings of the INST switch: 2.5x and 4.0x.
6. The Remote Maintenance Mode is enabled by applying 24 VDC to the two wire cable that exists
the left side of the breaker. The wires are color coded as follows: Yellow = +24 V and Black =
common ground. A blue colored LED, on the left side of the breaker is the Maintenance Mode
section of the trip unit, will light. The lighted blue LED indicates that the lowest setting of the
Maintenance Mode is enabled. This setting corresponds to 2.5x of In. Turning the adjustable
switch on the trip unit has no affect on either the Maintenance Mode or the INST Mode settings
while the blue LED is lit. In addition to the blue colored LED, a relay contact (C, NO) is available.
The wires for this contact exit the left hand side of the breaker and are color coded as follows:
Blue = C, and Red = NO.
7. Contact Eaton for additional information.
Left Side of Breaker
YellowBlack
Blue
Red
24 Vdc
Relay Wiring
NO
C
800A 18x
1200A/1250A 12x
1600A 9x
Last
Instantaneous
Value
Proof 4 — March 20, 2016 11:29 PM
8
Time Current Curves TD012029EN
Effective February 2016
NG/ND-Frames
EATON www.eaton.com
AB DE-ION circuit breakers
10,000
0.5
0.6
0.7
0.8
0.9
1
3
5
6
7
8
9
10
20
30
40
50
60
70
80
90
100
200
Current in Multiples of Ampere Rating In
Current in Multiples of Ampere Rating In
300
400
500
600
700
800
900
1,000
2,000
3,000
4,000
5,000
6,000
7,000
8,000
9,000
10,000
4
2
0.5
0.6
0.7
0.8
0.9
1
3
5
6
7
8
9
10
20
30
40
50
60
70
80
90
100
200
300
400
500
600
700
800
900
1,000
2,000
3,000
4,000
5,000
6,000
7,000
8,000
9,000
10,000
4
2
1 Hour1 MinuteTime in Seconds 2 Hours
1 Hour 1 Minute Time in Seconds2 Hours
5,000
3,000
2,000
1,000
500
300
200
100
50
30
20
10
5
3
2
1
.5
.3
.2
.1
.05
.03
.02
.01
10,000
5,000
3,000
2,000
1,000
500
300
200
100
50
30
20
10
5
3
2
1
.5
.3
.2
.1
.05
.03
.02
.01
Maximum Total
Clearing Time
Minimum Total
Clearing Time
Available Long Delay
Time Settings Shown
@ 6 x In 2 to 24 Seconds +0/–30%
in 0.1 Second Increments
Available Short Delay
Pickup Settings 1.5 to 8 x In
±5% in 0.1 Increments
Available Flat Short Delay
Time Settings 0.1 to 0.5 Seconds
in 0.01 Second Increments
Application
Determines
End of Curve
24
7
4
2
.3
.1
Circuit breaker time/current curves (phase current)
Series G NHH circuit breakers
equipped with Digitrip OPTIM 550 trip units
response: LONG DELAY I T, SHORT DELAY FLAT
2
Catalog
Number
Ampere
Rating (In)
Short Delay
Pickup Range
1.5 to 8 x In Amperes
NHH3150T52X15 150 225–1200
NHH3175T52X15 175 262–1400
NHH3200T52X15 200 300–1600
NHH3225T52X15 225 337–1800
NHH3250T52X15 250 375–2000
NHH3300T52X15 300 450–2400
NHH3350T52X15 350 525–2800
1. For field testing primary injection methods, follow
NEMA AB4 publications.
2. Calibration response in short delay pickup range is the same for
1, 2, or 3 poles in series.
3. There is a memory effect that can act to shorten the long delay.
The memory effect comes into play if a current above the long
delay pickup value exists for a time and then is cleared by the
tripping of a downstream device or the circuit breaker itself.
A subsequent overload will cause the circuit breaker to trip in
shorter time than normal. The amount of time reduction is
inverse to the amount of time that has elapsed since the
previous overload. Approximately five minutes is required
between overloads to completely reset the memory.
4. The end of the curve is determined by the interrupting rating
of the circuit breaker. See Interrupting rating table above.
5. The Long Delay and Short Delay Pickup tolerances are
6. For additional curve tolerances, contact Eaton.
7. Total clearing times shown include the response times of the trip
unit, the breaker opening, and the extinction of the arcing current.
.5
Interrupting Rating
UL/CSA rms Sym. kA, 50/60 Hz kA
Breaker Type 240V 480V 600V
NHH 100 65 35
IEC 60947-2 rms Sym. kA, 50/60 Hz kA
Breaker Type 240V, (Ue) 415V, (Ue) 690V, (Ue)
Icu Ics Icu Ics Icu Ics
NHH 100 100 70 50 25 13
1.15
+/–5%.
AB DE-ION circuit breakers
10,000
0.5
0.6
0.7
0.8
0.9
1
3
5
6
7
8
9
10
20
30
40
50
60
70
80
90
100
200
Current in Multiples of Ampere Rating In
Current in Multiples of Ampere Rating In
300
400
500
600
700
800
900
1,000
2,000
3,000
4,000
5,000
6,000
7,000
8,000
9,000
10,000
4
2
0.5
0.6
0.7
0.8
0.9
1
3
5
6
7
8
9
10
20
30
40
50
60
70
80
90
100
200
300
400
500
600
700
800
900
1,000
2,000
3,000
4,000
5,000
6,000
7,000
8,000
9,000
10,000
4
2
1 Hour1 MinuteTime in Seconds 2 Hours
1 Hour 1 Minute Time in Seconds2 Hours
5,000
3,000
2,000
1,000
500
300
200
100
50
30
20
10
5
3
2
1
.5
.3
.2
.1
.05
.03
.02
.01
10,000
5,000
3,000
2,000
1,000
500
300
200
100
50
30
20
10
5
3
2
1
.5
.3
.2
.1
.05
.03
.02
.01
MaximumTotal
Clearing Time
Minimum Total
Clearing Time
Available Short Delay
Pickup Settings 1.5 to 8 x In
±5% in 0.1 Increments
Available Long Delay
Time Settings Shown
@ 6 x In 1 to 5 Seconds +0/–30%
in 0.1 Second Increments
Available Flat Short Delay
Time Settings 0.1 to 0.5 Seconds
in 0.01 Second Increments
Application
Determines
End of Curve
.1
.5
1
5
Circuit breaker time/current curves (phase current)
Series G NHH circuit breakers
equipped with Digitrip OPTIM 550 trip units
response: LONG DELAY I T, SHORT DELAY FLAT
4
Catalog
Number
Ampere
Rating (In)
Short Delay
Pickup Range
1.5 to 8 x In Amperes
NHH3150T52X15 150 225–1200
NHH3175T52X15 175 262–1400
NHH3200T52X15 200 300–1600
NHH3225T52X15 225 337–1800
NHH3250T52X15 250 375–2000
NHH3300T52X15 300 450–2400
NHH3350T52X15 350 525–2800
1. For field testing primary injection methods, follow
NEMA AB4 publications.
2. Calibration response in short delay pickup range is the same for
1, 2, or 3 poles in series.
3. There is a memory effect that can act to shorten the long delay.
The memory effect comes into play if a current above the long
delay pickup value exists for a time and then is cleared by the
tripping of a downstream device or the circuit breaker itself.
A subsequent overload will cause the circuit breaker to trip in
shorter time than normal. The amount of time reduction is
inverse to the amount of time that has elapsed since the
previous overload. Approximately five minutes is required
between overloads to completely reset the memory.
Interrupting Rating
UL/CSA rms Sym. kA, 50/60 Hz kA
Breaker Type 240V 480V 600V
NHH 100 65 35
IEC 60947-2 rms Sym. kA, 50/60 Hz kA
Breaker Type 240V, (Ue) 415V, (Ue) 690V, (Ue)
Icu Ics Icu Ics Icu Ics
NHH 100 100 70 50 25 13
1.15
4. The end of the curve is determined by the interrupting rating
of the circuit breaker. See Interrupting rating table above.
5. The Long Delay and Short Delay Pickup tolerances are
6. For additional curve tolerances, contact Eaton.
7. Total clearing times shown include the response times of the trip
unit, the breaker opening, and the extinction of the arcing current.
+/–5%.
Figure 6. Digitrip OPTIM 550 NHH Long Delay I2T, Short Delay Flat NHH—Curve Number TC01207016E, September 2009
UIMP = 8 kV Utilization Category A
Proof 4 — March 20, 2016 11:29 PM
9
Time Current Curves TD012029EN
Effective February 2016
NG/ND-Frames
EATON www.eaton.com
AB DE-ION circuit breakers
10,000
0.5
0.6
0.7
0.8
0.9
1
3
5
6
7
8
9
10
20
30
40
50
60
70
80
90
100
200
Current in Multiples of Ampere Rating In
Current in Multiples of Ampere Rating In
300
400
500
600
700
800
900
1,000
2,000
3,000
4,000
5,000
6,000
7,000
8,000
9,000
10,000
4
2
0.5
0.6
0.7
0.8
0.9
1
3
5
6
7
8
9
10
20
30
40
50
60
70
80
90
100
200
300
400
500
600
700
800
900
1,000
2,000
3,000
4,000
5,000
6,000
7,000
8,000
9,000
10,000
4
2
1 Hour1 MinuteTime in Seconds 2 Hours
1 Hour 1 Minute Time in Seconds2 Hours
5,000
3,000
2,000
1,000
500
300
200
100
50
30
20
10
5
3
2
1
.5
.3
.2
.1
.05
.03
.02
.01
10,000
5,000
3,000
2,000
1,000
500
300
200
100
50
30
20
10
5
3
2
1
.5
.3
.2
.1
.05
.03
.02
.01
MaximumTotal
Clearing Time
Minimum Total
Clearing Time
Available Short Delay
Pickup Settings 1.5 to 8 x In
±5% in 0.1 Increments
Available Long Delay
Time Settings Shown
@ 6 x In 1 to 5 Seconds +0/–30%
in 0.1 Second Increments
Available Flat Short Delay
Time Settings 0.1 to 0.5 Seconds
in 0.01 Second Increments
Application
Determines
End of Curve
.1
.5
1
5
Circuit breaker time/current curves (phase current)
Series G NHH circuit breakers
equipped with Digitrip OPTIM 550 trip units
response: LONG DELAY I T, SHORT DELAY FLAT
4
Catalog
Number
Ampere
Rating (In)
Short Delay
Pickup Range
1.5 to 8 x In Amperes
NHH3150T52X15 150 225–1200
NHH3175T52X15 175 262–1400
NHH3200T52X15 200 300–1600
NHH3225T52X15 225 337–1800
NHH3250T52X15 250 375–2000
NHH3300T52X15 300 450–2400
NHH3350T52X15 350 525–2800
1. For field testing primary injection methods, follow
NEMA AB4 publications.
2. Calibration response in short delay pickup range is the same for
1, 2, or 3 poles in series.
3. There is a memory effect that can act to shorten the long delay.
The memory effect comes into play if a current above the long
delay pickup value exists for a time and then is cleared by the
tripping of a downstream device or the circuit breaker itself.
A subsequent overload will cause the circuit breaker to trip in
shorter time than normal. The amount of time reduction is
inverse to the amount of time that has elapsed since the
previous overload. Approximately five minutes is required
between overloads to completely reset the memory.
Interrupting Rating
UL/CSA rms Sym. kA, 50/60 Hz kA
Breaker Type 240V 480V 600V
NHH 100 65 35
IEC 60947-2 rms Sym. kA, 50/60 Hz kA
Breaker Type 240V, (Ue) 415V, (Ue) 690V, (Ue)
Icu Ics Icu Ics Icu Ics
NHH 100 100 70 50 25 13
1.15
4. The end of the curve is determined by the interrupting rating
of the circuit breaker. See Interrupting rating table above.
5. The Long Delay and Short Delay Pickup tolerances are
6. For additional curve tolerances, contact Eaton.
7. Total clearing times shown include the response times of the trip
unit, the breaker opening, and the extinction of the arcing current.
+/–5%.
Figure 7. Digitrip OPTIM 550 NHH Long Delay I4T, Short Delay Flat NHH—Curve Number TC01207017E, September 2009
UIMP = 8 kV Utilization Category A
Proof 4 — March 20, 2016 11:29 PM
10
Time Current Curves TD012029EN
Effective February 2016
NG/ND-Frames
EATON www.eaton.com
AB DE-ION circuit breakers
10,000
Current in Amperes
Current in Amperes Amperes
1,000
1,500
2,500
3,000
3,500
4,000
4,500
5,000
10,000
15,000
20,000
25,000
30,000
35,000
40,000
45,000
50,000
1,000
2,000
3,000
4,000
5,000
6,000
7,000
8,000
9,000
10,000
20,000
30,000
40,000
50,000
60,000
70,000
80,000
2,000
500
1,000
1,500
2,500
3,000
3,500
4,000
4,500
5,000
10,0000
15,0000
20,0000
25,0000
30,0000
35,0000
40,0000
45,0000
50,0000
2,000
500
1 Hour1 MinuteTime in Seconds 2 Hours
5,000
3,000
2,000
1,000
500
300
200
100
50
30
20
10
5
3
2
1
.5
.3
.2
.1
.05
.03
.02
.01
10,000
1 Hour 1 Minute Time in Seconds2 Hours
5,000
3,000
2,000
1,000
500
300
200
100
50
30
20
10
5
3
2
1
.5
.3
.2
.1
.05
.03
.02
.01
Available Instantaneous
Pickup Settings
1000 to 4000 in 50 Amp
Increments
Available Flat Response
Short Delay Time Settings
0.1 to 0.5 Seconds
in 0.01 Second Increments
Application
Determines
End of Curve
Fixed
Instantaneous
Overrides
.5
Amperes
1,000
2,000
3,000
4,000
5,000
6,000
7,000
8,000
9,000
1,0000
20,000
30,000
40,000
50,000
60,000
70,000
80,000
Circuit breaker time/current curves (phase current)
Series G NHH circuit breakers equipped
with Digitrip OPTIM 550 trip units response:
INSTANTANEOUS AND OVERRIDE
Catalog
Number
Ampere
Rating (In)
Override
Amperes
NHH3150T52X15 150
1000–4000 11900–16100
NHH3175T52X15 175
NHH3200T52X15 200
NHH3225T52X15 225
NHH3250T52X15 250
NHH3300T52X15 300
NHH3350T52X15 350
.3
.1
1000–4000 11900–16100
1000–4000 11900–16100
1000–4000 11900–16100
1000–4000 11900–16100
1000–4000 11900–16100
1000–4000 11900–16100
Interrupting Rating
UL/CSA rms Sym. kA, 50/60 Hz kA
Breaker Type 240V 480V 600V
NHH 100 65 35
IEC 60947-2 rms Sym. kA, 50/60 Hz kA
Breaker Type 240V, (Ue) 415V, (Ue) 690V, (Ue)
Icu Ics Icu Ics Icu Ics
NHH 100 100 70 50 25 13
226 54
310
3
9 876 5 43 10
2
9 876 5 43 10
1
9 87
10
0
2
22
10
20
50
100
200
500
1000
2000
5000
10000
2
.2
.1
.05
.02
.01
.005
.002
.001
.5
1
5
.2
.1
.05
.02
.01
.005
.002
.001
.5
2
1
5
10
20
50
100
200
500
1000
2000
5000
10000 6 5 43 10
3
9 876 5 43 10
2
9 876 5 43 10
1
9 87
10
0
2
1 Hour
Time in Seconds
1 Hour
Time in Seconds
Current in Multiples of In
Maximum Total
Clearing Time
Minimum Total
Clearning Time
Note 1
Short Delay Pick-up Settings
(Tolerance + 10%)
Fixed Instantaneous
Override (Note 2)
Note 3
Interrupting Rating
Determines End of Curve
1.15
Figure 8. Digitrip OPTIM 550 NHH Instantaneous and Override NHH—Curve Number TC01207018E, September 2009
Instantaneous
Pickup settings
(in 50A increments)
1. For eld testing primary injection methods, follow NEMA AB4 publications.
2. Calibration response in instantaneous pickup range is the same for 1, 2, or 3
poles in series.
3. The end of the curve is determined by the interrupting rating of the circuit
breaker. See above tabulation.
4. The instantaneous settings tolerance is +/- 10%.
5. For additional curve tolerances, contact Eaton.
6. Total clearing times shown include the response times of the trip unit, the
breaker opening, and the extinction of the arcing current.
(+/- 10%)
UIMP = 8 kV Utilization Category A
Proof 4 — March 20, 2016 11:29 PM
11
Time Current Curves TD012029EN
Effective February 2016
NG/ND-Frames
EATON www.eaton.com
226 54
310
3
9 876 5 43 10
2
9 876 5 43 10
1
9 87
10
0
2
22
10
20
50
100
200
500
1000
2000
5000
10000
2
.2
.1
.05
.02
.01
.005
.002
.001
.5
1
5
.2
.1
.05
.02
.01
.005
.002
.001
.5
2
1
5
10
20
50
100
200
500
1000
2000
5000
10000 6 5 43 10
3
9 876 5 43 10
2
9 876 5 43 10
1
9 87
10
0
2
1 Hour
Time in Seconds
1 Hour
Time in Seconds
Current in Multiples of In
Maximum Total
Clearing Time
Minimum Total
Clearning Time
Note 1
Short Delay Pick-up Settings
(Tolerance + 10%)
Fixed Instantaneous
Override (Note 2)
Note 3
Interrupting Rating
Determines End of Curve
1.15
Notes:
1. Curves accuracy applies between -20 to +40°C breaker ambient. For
possible continuous ampere derating refer to Cutler-Hammer.
2. For high fault levels a xed instantaneous over-ride is provided at 14400
amperes, +/- 15%.
3. Total clearing times shown include the response times of the trip
unit, the breaker opening, and the extinction of the arcing current.
4. Not UL/CSA listed.
5. 800A Maximum.
800 Fixed 1600-6400
700 Fixed 1400-5600
630 Fixed 1260-5040
600 Fixed 1200-4800
550 Fixed 1100-4400
500 Fixed 1000-4000
450 Fixed 900-3600
400 Fixed 800-3200
400,500,600,800 Adjustable 800-6400
400,500,630,800 Adjustable 800-6400
800 Ampere Trip Unit Rating Plug
Ampere
Rating (In)Type
Pick-up
Range
Amperes
1250 Fixed 2500-10000
1200 Fixed 2400-9600
1000 Fixed 2000-8000
900 Fixed 1800-7200
800 Fixed 1600-6400
700 Fixed 1400-5600
630 Fixed 1260-5040
600 Fixed 1200-4800
600,800,1000,1200 Adjustable 1200-9600
600,800,1000,1250 Adjustable 1200-10000
1250 & 1200 Ampere Trip Unit Rating Plug
Ampere
Rating (In)Type
Pick-up
Range
Amperes
Figure 9. Digitrip 310 Long Delay and Short Delay with I2T Response (LS, LSG) - Curve Number TC01209003E
4
4
Digitrip 310 Circuit Breaker Time/Current Curves
(Phase Current)
Series G N-Frame Circuit Breakers
Eaton/Cutler-Hammer NG_ _ _ _T_ _W NGU Electronic LD and SD
with Flat Response
Catalog Types: NGS, NGH, NGC, NGU, GNS, GNH, GNC, and GNU
circuit breakers, three- and four-pole
Trip Unit Types: T33 (LS), T35 (LSG)
4
4
4
UL/CSA rms Sym. kA, 50/60 Hz
IEC 60947-2 rms Sym. kA, 50/60 Hz
Icu Ics Icu Ics Icu Ics
NGS 85 85 50 50 20 10
NGH 100 100 70 50 25 13
NGC 200 100 100 50 35 18
220/240V (Ue) 380/415V (Ue) 660/690V (Ue)
Breaker Type
NGS 65 50 25
NGH 100 65 35
NGC 200 100 65
NGU 200 150 65
240V 480V 600V
Breaker Type
Interrupting Rating
5
Proof 4 — March 20, 2016 11:29 PM
12
Time Current Curves TD012029EN
Effective February 2016
NG/ND-Frames
EATON www.eaton.com
654 10
1
987
10
0
6543 9876543 9872 10
3
2
5
10
20
50
100
200
500
1000
2000
5000
10000
.2
.1
.05
.02
.01
.005
.002
.001
.5
1
.2
.1
.05
.02
.01
.005
.002
.001
.5
2
1
5
10
20
50
100
200
500
1000
2000
5000
10000
10
2
2
32
654
101
98710
0
32 6543 9872 10
2
6543 987 10
3
2
I
1 Hour
Time in Seconds
1 Hour
Time in Seconds
Current in Multiples of In
Maximum Total
Clearing Time
Note 1
Minimum Total
Clearning Time
Short Delay Pick-up Settings
(Tolerance + 10%)
300ms
200ms
100ms
Fixed Instantaneous
Override (Note 2)
Note 3
Interrupting Rating
Determines End of Curve
1.15
654 101
987
100654398765439872 103
2
5
10
20
50
100
200
500
1000
2000
5000
10000
.2
.1
.05
.02
.01
.005
.002
.001
.5
1
.2
.1
.05
.02
.01
.005
.002
.001
.5
2
1
5
10
20
50
100
200
500
1000
2000
5000
10000
1022
32
654
10
1
987
1003265439872 1026543987 103
2
I
5X
7X
6X
3X
2X
4X
8X
1 Hour
Time in Seconds
1 Hour
Time in Seconds
Current in Multiples of In
Current in Multiples of In
Maximum Total
Clearing Time
Note 1
Minimum Total
Clearning Time
Short Delay Pick-up Settings
(Tolerance + 10%)
300ms
200ms
100ms
Fixed Instantaneous
Override (Note 2)
Interrupting Rating
Determines End of Curve
Note 3
1.15
800 Fixed 1600-6400
700 Fixed 1400-5600
630 Fixed 1260-5040
600 Fixed 1200-4800
550 Fixed 1100-4400
500 Fixed 1000-4000
450 Fixed 900-3600
400 Fixed 800-3200
400,500,600,800 Adjustable 800-6400
400,500,630,800 Adjustable 800-6400
800 Ampere Trip Unit Rating Plug
Ampere
Rating (In)Type
Pick-up
Range
Amperes
1250 Fixed 2500-10000
1200 Fixed 2400-9600
1000 Fixed 2000-8000
900 Fixed 1800-7200
800 Fixed 1600-6400
700 Fixed 1400-5600
630 Fixed 1260-5040
600 Fixed 1200-4800
600,800,1000,1200 Adjustable 1200-9600
600,800,1000,1250 Adjustable 1200-10000
1250 & 1200 Ampere Trip Unit Rating Plug
Ampere
Rating (In)Type
Pick-up
Range
Amperes
Figure 10. Digitrip 310 Long Delay and Short Delay with Flat Response (LSI, LSIG) - Curve Number TC01209004E
Notes:
1. Curves accuracy applies between -20 to +40°C breaker ambient. For
possible continuous ampere derating refer to Cutler-Hammer.
2. For high fault levels a xed instantaneous over-ride is provided at 14400
amperes, +/- 15%.
3. Total clearing times shown include the response times of the trip
unit, the breaker opening, and the extinction of the arcing current.
4. Not UL/CSA listed.
5. 800A Maximum.
Digitrip 310 Circuit Breaker Time/Current Curves (Phase Current)
Series G N-Frame Circuit Breakers
Eaton/Cutler-Hammer NG_ _ _ _T_ _W Electronic LD and SD
with Flat Response
Catalog Types: NGS, NGH, NGC, NGU, GNS, GNH, GNC, and GNU
circuit breakers, three- and four-pole
Trip Unit Types: T33 (LS), T35 (LSG)
4
4
UL/CSA rms Sym. kA, 50/60 Hz
IEC 60947-2 rms Sym. kA, 50/60 Hz
Icu Ics Icu Ics Icu Ics
NGS 85 85 50 50 20 10
NGH 100 100 70 50 25 13
NGC 200 100 100 50 35 18
220/240V (Ue) 380/415V (Ue) 660/690V (Ue)
Breaker Type
NGS 65 50 25
NGH 100 65 35
NGC 200 100 65
NGU 200 150 65
240V 480V 600V
Breaker Type
Interrupting Rating
5
4
4
4
Proof 4 — March 20, 2016 11:29 PM
13
Time Current Curves TD012029EN
Effective February 2016
NG/ND-Frames
EATON www.eaton.com
654 101
987
100654398765439872 103
2
5
10
20
50
100
200
500
1000
2000
5000
10000
.2
.1
.05
.02
.01
.005
.002
.001
.5
1
.2
.1
.05
.02
.01
.005
.002
.001
.5
2
1
5
10
20
50
100
200
500
1000
2000
5000
10000
1022
32
654
10
1
987
1003265439872 1026543987 103
2
I
5X
7X
6X
3X
2X
4X
8X
1 Hour
Time in Seconds
1 Hour
Time in Seconds
Current in Multiples of In
Current in Multiples of In
Maximum Total
Clearing Time
Note 1
Minimum Total
Clearning Time
Short Delay Pick-up Settings
(Tolerance + 10%)
300ms
200ms
100ms
Fixed Instantaneous
Override (Note 2)
Interrupting Rating
Determines End of Curve
Note 3
1.15
Notes:
1. Curves accuracy applies between -20 to +40°C breaker ambient. For
possible continuous ampere derating refer to Cutler-Hammer.
2. For high fault levels a xed instantaneous over-ride is provided at 14400
amperes, +/- 15%.
3. Total clearing times shown include the response times of the trip
unit, the breaker opening, and the extinction of the arcing current.
4. Not UL/CSA Listed.
800,1000,1250,1600 Adjustable 1600-12800
1600 Ampere Trip Unit Rating Plug
1600 A Frame
Ampere
Rating (In)Type
Pick-up
Range
Amperes
Figure 11. Digitrip 310 Long Delay and Short Delay with Flat Response (1600A) (LSI, LSIG) - Curve Number TC01209006E
Digitrip 310 Circuit Breaker Time/Current Curves (Phase Current)
Series G N-Frame Circuit Breakers
Eaton/Cutler-Hammer NG_ _ _ _T_ _W Electronic LD and SD with Flat
Response (1600A)
Catalog Types: NGS, NGH, GNS, GNH circuit breakers, three- and four-pole
Trip Unit Types: T32 (LSI), T36 (LSIG)
4
IEC 60947-2 rms Sym. kA, 50/60 Hz
Icu Ics Icu Ics Icu Ics
NGS 85 85 50 50 20 10
NGH 100 100 70 50 25 13
220/240V (Ue) 380/415V (Ue) 660/690V (Ue)
Breaker Type
Interrupting Rating
Proof 4 — March 20, 2016 11:29 PM
14
Time Current Curves TD012029EN
Effective February 2016
NG/ND-Frames
EATON www.eaton.com
Proof 4 — March 20, 2016 11:29 PM
ND 3 120 T3 2 W
Circuit Breaker/
Frame Type
ND
HND
NDC
NDU
CND
CHND
CNDC
Number of Poles
2
3
4
= Two-pole
= Three-pole
= Four-pole
Trip Type
2
3
5
6
7
= LSI
= LS
= LSG
= LSIG
= LSIA
Circuit Breaker/Frame
Ampere Rating
800
120
= 800 amperes
= 1200 amperes
Trip Model
T3
T5
T7
T10
= Model 310
= Model 550
= Model 750
= Modle 1050
Suffix
E
EH
K
W
X
Y
= 100% R.P. protected (four-pole)
= 50% R.P. protected (four-pole)
= High magnetic molded case switch
= Without terminals
= Load only terminals
= Line only terminals
Catalog Number Selection
This information is presented only as an aid to understanding catalog numbers.
It is not to be used to build catalog numbers for circuit breakers or trip units.
Time Current Curves TD012029EN
Effective February 2016
NG/ND-Frames
EATON www.eaton.com
Proof 4 — March 20, 2016 11:29 PM
6X
8X
4X
7X
2X
Long Delay➀
Minimum Total
Clearing Time
Long Delay ➀
Maximum Total
Clearing Time
Standard Fixed
Rating Plug
Short Delay
Pick Up
Settings
(Tolerance
± 10%)
5X
3X
CURREN T IN MULTIPLES OF R ATING PLU G AMPERES (In)
.5
.5
TIME IN SECONDS
10,000
100
50
30
20
10
5
3
2
1
.5
.3
.2
.1
.05
.03
.02
.01
.005
.003
.002
.001
1,000
500
300
200
5,000
3,000
2,000
1 HOUR
1 MINUTE 2 HOURS
20105432
1.8.6
1
.8
.6
100,000
.1
.01
10,000
50,000
40,000
30,000
20,000
200,000
.001
SECONDS
CURRENT IN AMPS
CURRENT IN MULTIPLES OF RATING PLU G AMPERES (In)
60,000
70,000
80,000
90,000
.7 .9 6 7 8 9
20105432 6 7 8 9
.05
.03
.02
.005
.003
.002
Fixed Instantaneous
Overide
Interrupting
Rating
Determines
End of Curve ➂
.7 .9
1.15
Circuit Breaker Time/Current Curves (Phase Current)
Series C N-Frame Circuit Breakers
Equipped With Type NES Digitrip RMS 310 Trip Units
The NES Digitrip RMS 310 Trip Units are AC only devices that employ microprocessor based technology that provides true RMS current
sensing means for proper correlation with thermal characteristics of conductors and equipment. They are used with Circuit Breaker
Types: ND, CND, HND, CHND, NDC, and CNDC.
Figure 12. I2T Ramp Short Time Delay (Phase Protection) - Curve Number SC-5375-92A, October 2006
Types ND, CND, HND, CHND, NDC, CNDC, NDU, NGU Equipped With Type NES Digitrip RMS 310 Trip
Units With I2t Ramp Short Time Delay (Phase Protection)
800 800 Fixed 8NES800T 1600-6400
800 700 Fixed 8NES700T 1400-5600
800 630 Fixed 8NES630T 1260-5040
800 600 Fixed 8NES600T 1200-4800
800 550 Fixed 8NES550T 1100-4400
800 500 Fixed 8NES500T 1000-4000
800 450 Fixed 8NES450T 900-3600
800 400 Fixed 8NES400T 800-3200
1200 400, 500, 600, 800 Adj. A8NES800T1 800-6400
1200 400, 500, 600, 800 Adj. A8NES800T2 800-6400
1200 1200 Fixed 12NES1200T 2400-9600
1200 1000 Fixed 12NES1000T 2000-8000
1200 900 Fixed 12NES900T 1800-7200
1200 800 Fixed 12NES800T 1600-6400
1200 700 Fixed 12NES700T 1400-5600
1200 630 Fixed 12NES630T 1260-5040
1200 600 Fixed 12NES600T 1200-4800
1200 600, 800, 1000, 1200 Adj. A12NES1200T1 1200-9600
Frame
Rating
Amperes
(Max.)
Available Rating Plugs
Ampere
Rating
(In)Type Catalog
Number
Short Delay
Pickup Range
Amperes
UL/CSA rms Sym. kA, 50/60 Hz
ND, CND 65 50 25
HND, CHND 100 65 35
NDC, CNDC 200 100 50
240V 480V 600V
Breaker Type
Interrupting Rating
IEC 60947-2 rms Sym. kA, 50/60 Hz
ND, CND 65 50
HND, CHND 100 65
NDC, CNDC 200 100
240/240V 380/415V
Breaker Type
ICS = .25 ICU, ICW = 15 kA @ .5S, Uimp = 8kV
Typical Trip Unit NameplateI
2
t Ramp Short Time Delay
Digitrip RMS 310
Trip Unit
40°C Ambient
Short Delay
Pickup
5
73
2 8
4 6 TEST
Remov eEngaged
Push
to
Trip
Digitrip RMS 310 Rating Plug
Cat.–
/n–
“Y”
x In
4
4
4
4
Notes:
Curve accuracy applies from -20°C to +55°C ambient. For possible ampere derating for ambient above 40°C, refer to Eaton.
Digitrip RMS 310 trip units are suitable for functional eld testing with test kit Cat. No. STK2. For eld testing using primary injection
methods, follow NEMA publication AB-4.
1 There is a memory effect that can act to shorten the long delay. The memory effect comes into play if a current above the long
delay pick up value exists for a time and then is cleared by the tripping of a downstream device or the circuit breaker itself. A
subsequent overload will cause the circuit breaker to trip in shorter time than normal. The amount of time delay reduction is inverse
to the amount of time that has elapsed since the previous overload. Approximately ve minutes is required between overloads to
completely reset the memory.
2 For high fault current levels a xed instantaneous override is provided at 14000A (Tolerance ±15%).
3 The end of the curve is determined by the interrupting rating of the circuit breaker. See above tabulation.
4 Not UL/CSA Listed.
5 Long Delay Pickup is 115% of In, +/- 5%.
15
16
Time Current Curves TD012029EN
Effective February 2016
NG/ND-Frames
EATON www.eaton.com
Proof 4 — March 20, 2016 11:29 PM
.1
.01
.001
.05
.03
.02
.005
.003
.002
6X
8X
4X
7X
3X
2X
Standard Fixed
Rating Plug
200 MS
100MS
300 MS
5X
TIME IN SECONDS
10,000
100
50
30
20
10
5
3
2
1
.5
.3
.2
.1
.05
.03
.02
.01
.005
.003
.002
.001
1,000
500
300
200
5,000
3,000
2,000
1 HOUR
1 MINUTE 2 HOURS
SECONDS
CURREN T IN MULTIPLES OF R ATING PLU G AMPERES (In)
.5
.5 20105432
1.8.6
1
.8
.6
100,000
10,000
50,000
40,000
30,000
20,000
200,000
CURRENT IN AMPS
CURRENT IN MULTIPLES OF R ATING PLU G AMPERES (In)
60,000
70,000
80,000
90,000
.7 .9 6 7 8 9
20105432 6 7 8 9
Short Delay
Pick Up
Settings
(Tolerance
±10%)
Long Delay➀
Minimum Total
Clearing Time
Long Delay ➀
Maximum Total
Clearing Time
Fixed Instantaneous
Overide ➁
Interrupting
Rating
Determines
End of Curve ➂
.7 .9
I
1.15
Figure 13. Adjustable Short Time Delay (Phase Protection) - Curve Number SC-5376-92A, October 2006
Types ND, CND, HND, CHND, NDC, CNDC, NDU, NGU Equipped With Type NES Digitrip RMS 310 Trip
Units With Adjustable Short Time Delay (Phase Protection)
Circuit Breaker Time/Current Curves (Phase Current)
Series C N-Frame Circuit Breakers
Equipped With Type NES Digitrip RMS 310 Trip Units
The NES Digitrip RMS 310 Trip Units are AC only devices that employ microprocessor based technology that provides true RMS current
sensing means for proper correlation with thermal characteristics of conductors and equipment. They are used with Circuit Breaker Types:
ND, CND, HND, CHND, NDC, and CNDC.
800 800 Fixed 8NES800T 1600-6400
800 700 Fixed 8NES700T 1400-5600
800 630 Fixed 8NES630T 1260-5040
800 600 Fixed 8NES600T 1200-4800
800 550 Fixed 8NES550T 1100-4400
800 500 Fixed 8NES500T 1000-4000
800 450 Fixed 8NES450T 900-3600
800 400 Fixed 8NES400T 800-3200
1200 400, 500, 600, 800 Adj. A8NES800T1 800-6400
1200 400, 500, 600, 800 Adj. A8NES800T2 800-6400
1200 1200 Fixed 12NES1200T 2400-9600
1200 1000 Fixed 12NES1000T 2000-8000
1200 900 Fixed 12NES900T 1800-7200
1200 800 Fixed 12NES800T 1600-6400
1200 700 Fixed 12NES700T 1400-5600
1200 630 Fixed 12NES630T 1260-5040
1200 600 Fixed 12NES600T 1200-4800
1200 600, 800, 1000, 1200 Adj. A12NES1200T1 1200-9600
Frame
Rating
Amperes
(Max.)
Available Rating Plugs
Ampere
Rating
(In)Type Catalog
Number
Short Delay
Pickup Range
Amperes
UL/CSA rms Sym. kA, 50/60 Hz
ND, CND 65 50 25
HND, CHND 100 65 35
NDC, CNDC 200 100 50
240V 480V 600V
Breaker Type
Interrupting Rating
IEC 60947-2 rms Sym. kA, 50/60 Hz
ND, CND 65 50
HND, CHND 100 65
NDC, CNDC 200 100
240/240V 380/415V
Breaker Type
ICS = .25 ICU, ICW = 15 kA @ .5S, Uimp = 8kV
Digitrip RMS 310
Trip Unit
40°C Ambient
Short Delay
Pickup
5
73
2 8
4 6 TEST
Remov eEngaged
Push
to
Trip
Digitrip RMS 310 Rating Plug
Cat.–
/n–
“Y”
x In
Typical Trip Unit NameplateAdjustable Short Time Delay
4
4
4
4
Notes:
Curve accuracy applies from -20°C to +55°C ambient. For possible ampere derating for ambient above 40°C, refer to Eaton.
Digitrip RMS 310 trip units are suitable for functional eld testing with test kit Cat. No. STK2. For eld testing using primary injection methods,
follow NEMA publication AB-4.
1 There is a memory effect that can act to shorten the long delay. The memory effect comes into play if a current above the long delay pick
up value exists for a time and then is cleared by the tripping of a downstream device or the circuit breaker itself. A subsequent overload
will cause the circuit breaker to trip in shorter time than normal. The amount of time delay reduction is inverse to the amount of time
that has elapsed since the previous overload. Approximately ve minutes is required between overloads to completely reset the memory.
2 For high fault current levels a xed instantaneous override is provided at 14000A (Tolerance ±15%).
3 The end of the curve is determined by the interrupting rating of the circuit breaker. See above tabulation.
4 Not UL/CSA Listed.
5 Long Delay Pickup is 115% of In, +/- 5%.
17
Time Current Curves TD012029EN
Effective February 2016
EATON www.eaton.com
Proof 4 — March 20, 2016 11:29 PM
5000
4000
3000
2000
Digitrip RMS 310
Trip Unit
40°C Ambient
TEST
Remov eEngaged
Push
to
Trip
Cat.–
/n–
Ground Fault
Pickup Time
4
6
2
1
3 5
500
150
1
300
IG=200A Millisec
“Y”
Digitrip RMS 310 Rating Plug
Short Delay
Pickup
5
73
2 8
4 6
x Inx IG
TIME IN SECONDS
10,000
100
50
30
20
10
5
3
2
1
.5
.3
.2
.1
.05
.03
.02
.01
.005
.003
.002
.001
1,000
500
300
200
5,000
3,000
2,000
1 HOUR
1 MINUTE 2 HOURS
100
.50
1000
800
600
900
700
500
400
300
200
5000
4000
3000
2000
1000
800
600
900
700
500
400
300
200
CURRENT IN AMPERES
.60
.70
.80
.90
100
.50
.60
.70
.80
.90
CURRENT IN AMPERES
400 A.
200 A.
800 A.
600 A.
1000 A.
Typical Trip Unit Nameplate
Ground Fault Pick Up Settings
(Tolerance ±10% Except
±20% on 200 A. Setting)
.15 SEC
.3 SEC
.5 SEC
I
1200 A.
Figure 14. Ground Fault Protection - Curve Number SC-5377-92A, October 2009
Types ND, CND, HND, CHND, NDC, CNDC, NDU, Equipped With Type NES Digitrip RMS 310 Trip
Units With Ground Fault Protection
Circuit Breaker Time/Current Curves (Ground Current)
Series C N-Frame Circuit Breakers
Equipped With Type NES Digitrip RMS 310 Trip Units
The NES Digitrip RMS 310 Trip Units are AC only devices that employ microprocessor based
technology that provides true RMS current sensing means for proper correlation with thermal
characteristics of conductors and equipment. They are used with Circuit Breaker Types ND, CND,
HND, CHND, NDC, and CNDC.
Notes:
Curve accuracy applies from –20°C to +55°C ambient.
Digitrip RMS 310 trip units are suitable for functional eld testing with Test Kit Cat. No. STK2.
For eld testing using primary injection methods, follow NEMA publication AB-4.
NG/ND-Frames
18
Time Current Curves TD012029EN
Effective February 2016
NG/ND-Frames
EATON www.eaton.com
Proof 4 — March 20, 2016 11:29 PM
.01
.01
10,000
5,000
3,000
2,000
1,000
500
300
200
100
50
30
20
10
5
3
2
1
11
.5
5.5.
.3
3.3.
.2
2.2.
.1
1.1.
.05
.05
.03
.03
.02
.02
1 MINUTE 1 HOUR 2 HOURS
SDNOCESNIEMIT
SDNOCESNIEMIT
500
600
700
800
900
2
3
20
30
4
5
6
7
40
50
60
70
80
90
100
300
10
0.8
0.9
1
0.5
0.6
0.7
8
9
20
30
40
50
60
70
80
90
0.5
2
3
5
6
7
10
8
9
200
400
CURRENT IN MULTIPLES OF LONG DELAY SETTING I
CURRENT IN MULTIPLES OF LONG DELAY SETTING I
1000
2000
3000
4000
5000
6000
7000
8000
9000
10,000
0.8
0.7
0.6
0.9
1
Minimum
Total
Clearing
Time
Maximum
Total
Clearing
Time
Available
Long Delay
Time Settings
Shown @ 6 x I
r
2-24 seconds +0 ⁄-30%
in 0.1 second
increments
Application
Determines
End of Curve
Available
Short Delay
Pickup Settings
1.5 to 8 x I
r
±5% in 0.1
increments
.5
.3
.1
Available I t Slope
Short Delay Time Settings
0.1 to 0.5 seconds in
0.01 second increments
2
Available Long Delay
Pickup Settings (I )
r
0.4 to 1 x I = I
n r
in 0.01 increments
r
r
24
7
4
2
100
1.15
Figure 15. Long Delay I2T, Short Delay I2T - Curver Number SC-6331-96, October 2006
Circuit Breaker Time/Current Curves (Phase Current)
Series C N - Frame Circuit Breakers
Equipped With Digitrip Optim Trip Units
Response: LONG DELAY I2t, SHORT DELAY I2t
Notes:
1 For eld testing primary injection methods, follow NEMA AB4 guidelines.
2 Calibration response in short delay pickup range is the same for 1, 2, or 3 poles in series.
3 There is a memory effect that can act to shorten the long delay. The memory effect
comes into play if a current above the long delay pickup value exists for a time and then
is cleared by the tripping of a downstream device or the circuit breaker itself. A
subsequent overload will cause the circuit breaker to trip in shorter time than normal.
The amount of time reduction is inverse to the amount of time that has elapsed since the
previous overload. Approximately ve minutes is required between overloads to
completely reset the memory.
4 The end of the curve is determined by the interrupting rating of the circuit breaker.
See above tabulation.
5 This curve is shown as a multiple of the Long Delay Pick-up Setting, (Ir). This Ir setting is
programmed in primary value amperes via a Breaker Interface Module, or OPTIMizer,
or a Remote PC (IMPACC System).
6 The Long Delay Pick-up Point (indicated by a ashing LED on the product) nominally
occurs above 115% of the Ir current, with a +/- 5% tolerance. The short delay settings have
conventional 100%, +/- 5% as the pickup points.
7 For additional curve tolerances contact Eaton.
8 Total clearing times shown include the response times of the trip unit, the breaker
opening, and the quenching of the arcing current.
800 800 ORPL80A800 320 - 800 480 - 6400
800 700 ORPL80A700 280 - 700 420 - 5600
800 630 ORPL80A630 252 - 630 378 - 5040
800 600 ORPL80A600 240 - 600 360 - 4800
800 550 ORPL80A550 220 - 550 330 - 4400
800 500 ORPL80A500 200 - 500 300 - 4000
800 450 ORPL80A450 180 - 450 270 - 3600
800 400 ORPL80A400 160 - 400 240 - 3200
1200 1200 ORPL12A1200 480 -1200 720 - 9600
1200 1000 ORPL12A1000 400 -1000 600 - 8000
1200 900 ORPL12A900 360 - 900 540 - 7200
1200 800 ORPL12A800 320 - 800 480 - 6400
1200 700 ORPL12A700 280 - 700 420 - 5600
1200 600 ORPL12A600 240 - 600 360 - 4800
Maximum
Ampere
Rating
Available Rating Plugs
Ampere
Rating
(In)
Rating Plug
Catalog
Number
Long Delay
Pickup Range
0.4 to 1 x In
Amperes
Short Delay
Pickup Range
1.5 to 8 x Ir
Amperes
UL/CSA rms Sym. kA, 50/60 Hz
ND 65 35 25
HND 100 65 35
NDC 200 100 50
240V 480V 600V
Breaker Type
Interrupting Rating
IEC 60947-2 rms Sym. kA, 50/60 Hz
Icu Ics Icu Ics Icu Ics
ND 85 85 50 50 20 10
HND 100 100 70 50 25 13
NDC 200 100 100 50 35 18
240V 415V 690V
Breaker Type
U = 8kV Utilization Category A
N-Frame Circuit Breakers Equipped with Digitrip OPTIM Trip Units; Long Delay I2t, Short Delay I2t
19
Time Current Curves TD012029EN
Effective February 2016
NG/ND-Frames
EATON www.eaton.com
Proof 4 — March 20, 2016 11:29 PM
.01
.01
10,000
5,000
3,000
2,000
1,000
500
300
200
100
50
30
20
10
5
3
2
1
11
.5
5.5.
.3
3.3.
.2
2.2.
.1
1.1.
.05
.05
.03
.03
.02
.02
ETUNIM 1 1 HOUR 2 HOURS
SDNOCESNIEMIT
SDNOCESNIEMIT
500
600
700
800
900
2
3
20
30
4
5
6
7
40
50
60
70
80
90
100
300
10
0.8
0.9
1
0.5
0.6
0.7
8
9
20
30
40
50
60
70
80
90
0.5
2
3
5
6
7
10
8
9
200
400
CURRENT IN MULTIPLES OF LONG DELAY SETTING I
CURRENT IN MULTIPLES OF LONG DELAY SETTING I
1000
2000
3000
4000
5000
6000
7000
8000
9000
10,000
0.8
0.7
0.6
0.9
1
Minimum
Total
Clearing
Time
Maximum
Total
Clearing
Time
Application
Determines
End of Curve
.1
.5
.3
Available
Long Delay
Time Settings
Shown @ 6 x I
r
2-24 seconds +0 ⁄-30%
in 0.1 second
increments
Available
Short Delay
Pickup Settings
1.5 to 8 x I
r
±5% in 0.1
increments
Available Flat
Short Delay Time Settings
0.1 to 0.5 seconds
in 0.01 second increments
Available Long Delay
Pickup Settings (I )
r
0.4 to 1 x I = I
n r
in 0.01 increments
r
r
24
7
4
2
100
1.15
Figure 16. Long Delay I2T, Short Delay Flat - Curve Number SC-6332-96, October 2006
Circuit Breaker Time/Current Curves (Phase Current)
Series C N - Frame Circuit Breakers
Equipped With Digitrip Optim Trip Units
Response: LONG DELAY I2t, SHORT DELAY FLAT
Notes:
1 For eld testing primary injection methods, follow NEMA AB4 guidelines.
2 Calibration response in short delay pickup range is the same for 1, 2, or 3 poles in series.
3 There is a memory effect that can act to shorten the long delay. The memory effect
comes into play if a current above the long delay pickup value exists for a time and then
is cleared by the tripping of a downstream device or the circuit breaker itself. A
subsequent overload will cause the circuit breaker to trip in shorter time than normal.
The amount of time reduction is inverse to the amount of time that has elapsed since the
previous overload. Approximately ve minutes is required between overloads to
completely reset the memory.
4 The end of the curve is determined by the interrupting rating of the circuit breaker.
See above tabulation.
5 This curve is shown as a multiple of the Long Delay Pick-up Setting, (Ir). This Ir setting is
programmed in primary value amperes via a Breaker Interface Module, or OPTIMizer,
or a Remote PC (IMPACC System).
6 The Long Delay Pick-up Point (indicated by a ashing LED on the product) nominally
occurs above 115% of the Ir current, with a +/- 5% tolerance. The short delay settings have
conventional 100%, +/- 5% as the pickup points.
7 For additional curve tolerances contact Eaton.
8 Total clearing times shown include the response times of the trip unit, the breaker
opening, and the quenching of the arcing current.
800 800 ORPL80A800 320 - 800 480 - 6400
800 700 ORPL80A700 280 - 700 420 - 5600
800 630 ORPL80A630 252 - 630 378 - 5040
800 600 ORPL80A600 240 - 600 360 - 4800
800 550 ORPL80A550 220 - 550 330 - 4400
800 500 ORPL80A500 200 - 500 300 - 4000
800 450 ORPL80A450 180 - 450 270 - 3600
800 400 ORPL80A400 160 - 400 240 - 3200
1200 1200 ORPL12A1200 480 -1200 720 - 9600
1200 1000 ORPL12A1000 400 -1000 600 - 8000
1200 900 ORPL12A900 360 - 900 540 - 7200
1200 800 ORPL12A800 320 - 800 480 - 6400
1200 700 ORPL12A700 280 - 700 420 - 5600
1200 600 ORPL12A600 240 - 600 360 - 4800
Maximum
Ampere
Rating
Available Rating Plugs
Ampere
Rating
(In)
Rating Plug
Catalog
Number
Long Delay
Pickup Range
0.4 to 1 x In
Amperes
Short Delay
Pickup Range
1.5 to 8 x Ir
Amperes
UL/CSA rms Sym. kA, 50/60 Hz
ND 65 35 25
HND 100 65 35
NDC 200 100 50
240V 480V 600V
Breaker Type
Interrupting Rating
IEC 60947-2 rms Sym. kA, 50/60 Hz
Icu Ics Icu Ics Icu Ics
ND 85 85 50 50 20 10
HND 100 100 70 50 25 13
NDC 200 100 100 50 35 18
240V 415V 690V
Breaker Type
U = 8kV Utilization Category A
N-Frame Circuit Breakers Equipped with Digitrip OPTIM Trip Units; Long Delay I2t, Short Delay Flat
20
Time Current Curves TD012029EN
Effective February 2016
NG/ND-Frames
EATON www.eaton.com
Proof 4 — March 20, 2016 11:29 PM
.01
.01
10,000
5,000
3,000
2,000
1,000
500
300
200
100
50
30
20
10
5
3
2
1
11
.5
5.5.
.3
3.3.
.2
2.2.
.1
1.1.
.05
.05
.03
.03
.02
.02
ETUNIM 1 1 HOUR 2 HOURS
SDNOCESNIEMIT
SDNOCESNIEMIT
500
600
700
800
900
2
3
20
30
4
5
6
7
40
50
60
70
80
90
100
300
10
0.8
0.9
1
0.5
0.6
0.7
8
9
20
30
40
50
60
70
80
90
0.5
2
3
5
6
7
10
8
9
200
400
CURRENT IN MULTIPLES OF LONG DELAY SETTING I
CURRENT IN MULTIPLES OF LONG DELAY SETTING I
1000
2000
3000
4000
5000
6000
7000
8000
9000
10,000
0.8
0.7
0.6
0.9
1
Application
Determines
End of Curve
Minimum
Total
Clearing
Time
Maximum
Total
Clearing
Time
Available
Long Delay
Time Settings
Shown @ 6 x I
r
1-5 seconds +10 ⁄-40%
in 0.1 second
increments
Available
Short Delay
Pickup Settings
1.5 to 8 x I
r
±5% in 0.1
increments
Available Flat
Short Delay Time Settings
0.1 to 0.5 seconds
in 0.01 second increments
Available Long Delay
Pickup Settings (I )
r
0.4 to 1 x I = I
n r
in 0.01 increments
5
1
100
.5
.1
r
r
1.15
Figure 17. Long Delay I4T, Short Delay Flat - Curve Number SC-6333-96, October 2006
Circuit Breaker Time/Current Curves (Phase Current)
Series C N - Frame Circuit Breakers
Equipped With Digitrip Optim Trip Units
Response: LONG DELAY I4t, SHORT DELAY FLAT
Notes:
1 For eld testing primary injection methods, follow NEMA AB4 guidelines.
2 Calibration response in short delay pickup range is the same for 1, 2, or 3 poles in series.
3 There is a memory effect that can act to shorten the long delay. The memory effect
comes into play if a current above the long delay pickup value exists for a time and then
is cleared by the tripping of a downstream device or the circuit breaker itself. A
subsequent overload will cause the circuit breaker to trip in shorter time than normal.
The amount of time reduction is inverse to the amount of time that has elapsed since the
previous overload. Approximately ve minutes is required between overloads to
completely reset the memory.
4 The end of the curve is determined by the interrupting rating of the circuit breaker.
See above tabulation.
5 This curve is shown as a multiple of the Long Delay Pick-up Setting, (Ir). This Ir setting is
programmed in primary value amperes via a Breaker Interface Module, or OPTIMizer,
or a Remote PC (IMPACC System).
6 The Long Delay Pick-up Point (indicated by a ashing LED on the product) nominally
occurs above 115% of the Ir current, with a +/- 5% tolerance. The short delay settings have
conventional 100%, +/- 5% as the pickup points.
7 For additional curve tolerances contact Eaton.
8 Total clearing times shown include the response times of the trip unit, the breaker
opening, and the quenching of the arcing current.
800 800 ORPL80A800 320 - 800 480 - 6400
800 700 ORPL80A700 280 - 700 420 - 5600
800 630 ORPL80A630 252 - 630 378 - 5040
800 600 ORPL80A600 240 - 600 360 - 4800
800 550 ORPL80A550 220 - 550 330 - 4400
800 500 ORPL80A500 200 - 500 300 - 4000
800 450 ORPL80A450 180 - 450 270 - 3600
800 400 ORPL80A400 160 - 400 240 - 3200
1200 1200 ORPL12A1200 480 -1200 720 - 9600
1200 1000 ORPL12A1000 400 -1000 600 - 8000
1200 900 ORPL12A900 360 - 900 540 - 7200
1200 800 ORPL12A800 320 - 800 480 - 6400
1200 700 ORPL12A700 280 - 700 420 - 5600
1200 600 ORPL12A600 240 - 600 360 - 4800
Maximum
Ampere
Rating
Available Rating Plugs
Ampere
Rating
(In)
Rating Plug
Catalog
Number
Long Delay
Pickup Range
0.4 to 1 x In
Amperes
Short Delay
Pickup Range
1.5 to 8 x Ir
Amperes
UL/CSA rms Sym. kA, 50/60 Hz
ND 65 35 25
HND 100 65 35
NDC 200 100 50
240V 480V 600V
Breaker Type
Interrupting Rating
IEC 60947-2 rms Sym. kA, 50/60 Hz
Icu Ics Icu Ics Icu Ics
ND 85 85 50 50 20 10
HND 100 100 70 50 25 13
NDC 200 100 100 50 35 18
240V 415V 690V
Breaker Type
U = 8kV Utilization Category A
N-Frame Circuit Breakers Equipped with Digitrip OPTIM Trip Units; Long Delay I4t, Short Delay Flat
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