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Time Current Curves TD012036EN Effective December 2015
Contents
Description Page
Catalog Number Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Digitrip RMS 310+ Electronic Trip Units
MDL, HMDL, CMDL, CHMDL, MDLB, HMLDB; 800A; 3- and 4-pole; LS and LSG . . . . . TD012051EN. . . . . . . . .6MDL, HMDL, CMDL, CHMDL, MDLB, HMLDB; 800A; 3- and 4-pole; LSI, LSIG,ALSI, ALSIG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TD012052EN . . . . . . . .7
Ground Fault Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TD012053EN. . . . . . . . .8Maintenance Mode Setting; ALSI and ALSIG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TD012054EN. . . . . . . . .9
Digitrip RMS 310 Electronic Trip UnitsMDL, HMDL, CMDL, CHMD; 800A; 3- and 4-pole; LS and LSG . . . . . . . . . . . . . . . . . . . . . SC-7204-99 . . . . . . . .10MDL, HMDL, CMDL, and CHMD; 800A 3- and 4-pole; LSI, LSIG, ALSI, ALSIG. . . . . . . . . . SC-6913-98 . . . . . . . .11Ground Fault Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SC-6914-98 . . . . . . . .12
MT Thermal/Magnetic Trip Unit
MDL, HMDL, MDLB, and HMDLB, 300-600A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SC-6911-98 . . . . . . . .13MDL, HMDL, MDLB, and HMDLB, 700-800A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SC-6912-98 . . . . . . . .14
Note:Time/Current characteristic curves for Series C M-frame circuit breakers--voltages shown in curve headings aremaximum at which the breaker may be applied. Interrupting capacity of inidvidual breaker is tabulated on each curve.
Note:The following curves are UL489 Listed for use in North America.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.For field testing molded case circuit breakers, refer to NEMA AB 4 guidelines.
Series C MDL-Frame 400-800A, 240-600V
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ote:N Unless noted below, all curves remain unchanged from their prior revision.
Revision Curve Number Page Date
2 EATONwww.eaton.com
Time Current Curves TD012036ENEffective December 2015
Series CM-Frame
Changed trip labels on page 5
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Time Current Curves TD012036EEffective December 20
Series CM-Frame
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.
MDL 3 800 F
Circuit Breaker/
Frame Type
MDL, MDLBHMDL, HMDLB
Number of Poles
2
3= Two-pole
= Three-pole
Circuit Breaker/Frame
Ampere Rating
300350400450500
600700800
Suffix
FKV
WX
Y
= Frame only
= High magnetic molded case switch
= 500C (thermal-magnetic trip units only)
= Without terminals
= Load side terminals only
= Line side terminals only
Table 2. Circuit Breaker/Frame
1
1
MT 3 800 T
Trip Unit Type
MTMES
Number of Poles
23
= Two-pole
= Three-pole
Trip Unit
Ampere Rating
300350400450500600700
800
Suffix
TV
LSLSILSGLSIG
= Thermal-magnetic
= 500C (thermal-magnetic trip units only)
= Digitrip RMS 310
= Digitrip RMS 310
= Digitrip RMS 310
= Digitrip RMS 310
Table 1. Thermal-Magnetic Trip Unit
1
1
Note
1 Thermal-magnetic only.
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Time Current Curves TD012036EN
Effective December 2015
Series C
M-Frame
EATONwww.eaton.com
MES 3 800 ALSIG B21
Trip
Unit Type
MES
Poles
3 = Three Amperes
800
Features
BlankB20B21
B22
ZG
= No feature
= High load alarm
= Ground fault
alarm, with trip
= Ground fault
alarm, no trip
= Zone selective
interlocking
Trip Unit
LSLSILSG
LSIGALSI
ALSIG
= 310+ Electronic LS
= 310+ Electronic LSI
= 310+ Electronic LSG
= 310+ Electronic LSIG
= 310+ Electronic LSI with
Maintenance Mode
= 310+ Electronic LSIG with
Maintenance Mode
Table 4. MDL Electronic Trip Unit
MDLB 3 800 F T36 B21 W
Performance at 480 VacPoles
3 = ThreeAmperes
800 Features
BlankB20B21
B22
ZG
= No feature= High load alarm= Ground fault alarm, with trip= Ground fault
alarm, no trip= Zone selective
interlocking
Trip Unit
T33T32T35T36T38
T39
= 310+ Electronic LS= 310+ Electronic LSI= 310+ Electronic LSG= 310+ Electronic LSIG= 310+ Electronic LSI with Maintenance Mode
= 310+ Electronic LSIG with Maintenance Mode
FrameDesignation
F
MDLB
HMDLBCMDLB
CHMDLB
= 50 kAIC
= 65 kAIC= 50 kAIC 100% rated
= 65 kAIC 100% rated
Terminals
W = No terminals
Table 3. MDL Breaker Assembly
MDL 3 800 F
Performance at 480 Vac
Poles
3 = Three Amperes
800
Frame Designation
F
MDLHMDLCMDL
CHMDL
= 50 kAIC
= 65 kAIC
= 50 kAIC
100% rated
= 65 kAIC
100% rated
Table 5. MDL Frame Only
Note
1 Maintenance Mode and ZSI are only available with LSI and LSIG trip units.
2 B21 and B22 features available only with LSG, LSIG and ALSIG trip units.
3 B2x suffixes cannot be combined with other B2x suffixes.
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Time Current Curves TD012036EEffective December 2
Series C
M-Frame
EATONwww.eaton.com
Figure 1. Digitrip 310+ Faceplates
ALSIG (With Maintenance Mode)
LS
LSI
LSG
LSIG
ALSI (With Maintenance Mode)
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Time Current Curves TD012036EN
Effective December 2015
Series C
M-Frame
EATONwww.eaton.com
.
.
.
.
.
.
0.01
2
10
20
30
40
50
60708090100
1000900800700600
500
400
300
200
2000
3000
4000
5000
6000700080009000
10,000
0.02
0.03
0.04
0.05
0.060.070.080.090.1
0.2
0.3
0.4
0.50.60.70.80.9
etuniM1
sruoH2
sdnoceSniemiT
ruo
H
1
Current in Multiples of (Ir)
1 2 3 4 5 7 10 20 300.5 0.7
Current in Multiples of (In)Current in Multiples of (Ir)I2t Trip Style (LS and LSG)
12
1 2 3 4 5 7 10 20 30 40 50 70 100 2 3 4 5 7 10 20 30 40 50 70 1000.5 0.7 12
Available Short DelayPickup Settings
28 x Ir 5%(See Notes 7 and 10)
Application
DeterminesEnd of Curve
InstantaneousOverride
(See Note 10)
I2t Short Delay(See Note 8)
67 ms
See Note 9
0.01
0.02
0.03
0.04
0.05
0.060.070.080.090.1
0.2
0.3
sdnoce
SniemiT
3
4
5
6789
Maximum Total
Clearing Time
Minimum Total
Clearing Time
1.15
Available Long Delay Time(Seconds +0/30%):
2*, 4*, 7*, 10, 12, 15*, 20, 24**Shown below at 6x
15
24
1
7
4
2
2 4
3
5
7
8
6
.
Digitrip 310+ Circuit Breaker Time/Current Curves (Phase Current)
Series C M-Frame Circuit Breakers (800A)
Catalog Types: MDL, HMDL, CMDL, CHMDL, MDLB, HMLDB
Trip Unit Types: 33 (LS), 35 (LSG)
Figure 2. Digitrip 310+ Trip Units (800A), Long Delay Response and Short Delay with I2T Response Curve and Override(LS, LSG) - TD012051EN, October 2014
MDL, MDLB, CMDL 65 50 25
HMDL, HMDLB, CHMDL 100 65 35
Interrupting Rating
UL/CSA rms Sym. kA, 50/60 Hz
Breaker Type 240V 480V 600V
Notes:
1 Curve accuracy applies from 20C to +55C ambient . For possible continuous ampere
derating for ambient above 40C, refer to Eaton . Temperatures above +88C cause an
over-temperature protection trip.
2 Application frequency is 50/60 Hertz.
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 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 Pick Up has 7 settings/positions, 28 Ir
8 Short Delay I2T band has a tolerance of 15%.
9 Breakpoint back to FLAT response occurs at 8x IRfor upper line of the I2T curve.
10 For high fault current levels, an additional fixed instantaneous hardware override is providedat 6800A (Tolerance 15%).
A 320A
B 400A
C 450A
D 500A
E 600A
F 630A
G 700A
H 800A
AvailableSensors Amperes(Ir)/(In) 800A
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Time Current Curves TD012036EEffective December 2
Series C
M-Frame
EATONwww.eaton.com
.
.
.
.
.
1 2 3 4 5 7 10 20 300.5 0.7 12
1000900800
2000
3000
5000
6000700080009000
10,000
30
40
50
60708090
100
700600
500
400
300
200
4000
etuniM1
sruoH2
ru
oH
1
0.01
2
0.02
0.03
0.04
0.05
0.060.070.080.090.1
0.2
0.3
0.4
0.5
0.60.70.80.9
3
4
5
6789
10
20
sdnoceSniemiT
Maximum TotalClearing Time
1.15
Available
Long Delay Time(Seconds +0/30%):
2*, 4*, 7*, 10, 12, 15*, 20, 24**Shown below at 6x
MinimumTotalClearingTime
Available ShortDelay Pickup
Settings 28, x Ir5%
(See Note 7)
300 ms
(P, Q, R)
120 ms
(M, N, O)
Inst.
(J, K, L)
1
Current in Multiples of (Ir)
Current in Multiples of (Ir)
Current in Multiples of (In)
1 2 3 4 5 7 10 20.5 0.7
Adjustable Flat Trip Style (LSI, LSIG, ALSI, ALSIG)
12 001070504030201743 50.01
0.02
0.03
0.04
0.05
0.060.070.080.090.1
0.2
0.3
0.4
sdnoce
SniemiT
ApplicationDetermines
End of Curve
InstantaneousOverride (See Note 8)
20 30 40 50 70 100
7
2 4
3
5
6
8
2
4
7
15
24
Figure 3. Digitrip 310+ Trip Units (800A), Long Delay Response and Short Delay with Flat Response Curve and Override(LSI, LSIG, ALSI, ALSIG) - TD012052EN, October 2014
Digitrip 310+ Circuit Breaker Time/Current Curves (Phase Current)
Series C M-Frame Circuit Breakers (800A)Catalog Types: MDL, HMDL, CMDL, CHMDL, MDLB, HMLDB
Trip Unit Types:32 (LSI), 36 (LSIG), 38 (ALSI), and 39 (ALSIG)
Notes:
1 Curve accuracy applies from 20C to +55C ambient . For possible continuous ampere
derating for ambient above 40C, refer to Eaton . Temperatures above +88C cause an
over-temperature protection trip.
2 Application frequency is 50/60 Hertz.
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 clearedby the tripping of a downstream device or the circuit breaker itself. A subsequent overload
will cause the c ircuit 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 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). Range is 110%120%.
6 Total clearing times shown include the response times of the trip unit, the breaker
Pickup = 115% of Ir opening, and the interruption of the current.
7 The Short Delay Pick Up has 7 settings/positions, 28 IR
8 For high fault current levels, an additional fixed instantaneous hardware override is provided
at 5620A (Tolerance 15%).
A 320A
B 400A
C 450A
D 500A
E 600A
F 630A
G 700A
H 800A
AvailableSensors Amperes(Ir)/(In) 800A
MDL, MDLB, CMDL 65 50 25
HMDL, HMDLB, CHMDL 100 65 35
Interrupting Rating
UL/CSA rms Sym. kA, 50/60 Hz
Breaker Type 240V 480V 600V
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Time Current Curves TD012036EN
Effective December 2015
Series C
M-Frame
EATONwww.eaton.com
0.01
2
3
4
5
6
8
10
20
30
40
50
60708090
100
1000900800700600
500
400
300
200
0.02
0.03
0.04
0.05
0.060.070.080.090.1
0.2
0.3
0.4
0.5
0.60.70.80.9
1
7
9
2000
3000
40005000
6000700080009000
10,000
etuniM1
Ground Current in Multiple of (In)
0.1 0.2 0.3 0.4 0.5 0.7 1 2
0.1 0.2 0.3 0.4 0.5 0.7 1 2
Ground Fault Pickup Settings
(Tolerance 10%)
0.4X
0.3X
0.2X 1X0.6X
0.8X
Inst.
(J, M, P)
120 ms
(K, N, Q)
300 ms
(L, O, R)
sdnoceSniemiT
Figure 4. Ground Fault Delay Response Curve (LSG, LSIG, ALSIG) - Curve Number TD012053EN
Digitrip 310+ Circuit Breaker Time/Current Curves (Ground Current)Series C M-Frame Circuit Breakers (800A)
Catalog Types:MDL, HMDL, CMDL, CHMDL, MDLB, HMLDB
Trip Unit Types:LSG, LSIG, ALSIG
Notes:
Curve accuracy applies from 20C to +55C ambient. For possible continuous ampere deratingfor ambient above 40C, refer to Eaton.
Digitrip RMS 310 trip units are suitable for functional field testing with test kit C at. No. STK2.For field testing using primary injection methods, follow NEMA publications
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Time Current Curves TD012036EEffective December 2
Series C
M-Frame
EATONwww.eaton.com
Current in Multiples of Rating( )In
.01
2
.02
.03
.04
.05
.06
.07
.08
.09
.1
.2
.3
.4
.5
.6
.7
.8
.9
1
3
4
5
6
7
8
9
10
1 2 3 4.
5 .6
.7 .
8.
910
20
30
40
505 6 7 8 9
2.5
Maintenance Mode Trip
TIMEINSECONDS
Applicationdeterminesend of curve
.
Figure 5. Maintenance Mode Setting (ALSI, ALSIG) - Curver Number - TD012054EN, October 2014
Digitrip 310+ Circuit Breaker Time/Current Curves
Maintenance Mode Setting
Trip Unit Types: 38 (ALSI) and 39 (ALSIG)
Series C M-Frame Trip Unit Nameplates
Notes:
1 The Maintenance Mode feature must be ENABLED via application of
24 Vdc for these curves to apply. The blue LED is lit 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 Nominal Values (Pickup) (Tolerance is 15%) 2.5 x In.
5 The total clearing times shown are conservative and consider the maximum response
time of the trip unit, the circuit breaker opening, and the interruption of the current in the worst case conditions such as: maximum rated voltages, single-phase interruption,
and minimum power factor. Faster clearing times are possible depending on the specific
system conditions.
Contact Eaton for additional information.
Ir= Continuous Current Setting or Rating Plug Value, Is= Current Sensor Frame Rating,
In= Rating Plug Value, Ig= Ground Current Pickup Multiplier, Ii= Instantaneous Override Pickup.
Left Side of Breaker
YellowBlack
Blue
Red
24 Vdc
Relay Wiring
NO
C
ALSI
ALSIG
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6X
8X
4X
7X
2X
Long Delay Minimum TotalClearing Time
Long Delay Maximum TotalClearing Time
Standard FixedRating Plug
Short DelayPick UpSettings(Tolerance10%)
5X
3X
CURRENT IN MULTIPLES OF RATING PLUG AMPERES (In )
.5
.5
TIMEINS
ECONDS
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
1HOUR
1MINUTE
2HOURS
20106. 8. 1
1.8.6
CURRENT IN MULTIPLES OF RATING PLUG AMPERES (In)
.7 .9 6 7 8 9
20102 6 7 8 9.7 .9
Fixed InstantaneousOverride
10,000
.1
.01
1000
5000
4000
3000
2000
20,000
.001
SECONDS
30,000
40,000
50,000
100,000
.02
.03
.04
.05
InterruptingRating
DeterminesEnd ofCurve
CURRENT IN AMPERES
2 3 4 5
+
3 4 5
1.15
Figure 6. MDL, HMDL, CMDL, and CHMDL, types MES3800LS and MES3800LSG - Curve Number SC-7204-99, June 2007
Circuit Breaker Time/Current Curves (Phase Current)
Series C M-Frame Circuit Breakers
Equipped With Type MES Digitrip RMS 310 Trip Units
Catalog Types: MES3800LS and MES3800LSG Digitrip RMS 310 Trip Units for usewith Circuit Breaker Types MDL, HMDL, CMDL and CHMDL 3 Poles.
Fixed Short Delay Time Typical Trip Unit Nameplate
Engaged
Remove
Cat.
In
Digitrip RMS 310 Rating Plug
Push to Trip
Short DelayPickup x In
5
7
2 8
4 6 Digitrip RMS 310Trip Unit40oCAmbient
Test
3
Notes:
Digitrip RMS 310 trip units are suitable for functional field testing with test kit Cat. No. STK2.For field testing using primary injection methods, follow NEMA AB4 publications.
Calibration response in short delay pick-up range is same for 1, 2 or 3 poles in series.
There is a memory effect that can act to shorten the long delay. The memory effect comesinto play if a current above the long delay pick-up value exists for a time and then is clearedby the tripping of a downstream device or the circuit breaker itself. A subsequent overloadwill cause the circuit breaker to trip in shorter time than normal. The amount of time delay
reduction is inverse to the amount of time that has elapsed since the previous overload.Approximately five minutes is required between overloads to completely reset the memory.
1 Curve accuracy applies from 20C to +55C ambient. For possible continuous ampere derating for ambient above 40C, refer to Eaton.
2 For high fault current levels a fixed instantaneous override is provided at 6800A. (Tolerance 15%).
3 The end of the curve is determined by the interrupting rating of the circuit breaker. See above tabulation.
4 Long delay pickup is 115% of In, +/- 15%.
800 Fixed 8MES800T 1600-6400
700 Fixed 8MES700T 1400-5600
600 Fixed 8MES600T 1200-4800
500 Fixed 8MES500T 1000-4000
400 Fixed 8MES400T 800-3200
400, 500, 600, 800 Adjustable A8MES800T1 800-6400
AmpereRating(In)
Available Rating Plugs
Type
Rating PlugCatalogNumber
Short DelayPickup RangeAmperes
UL/CSA rms Sym. kA, 50/60 Hz
MDL, MDLB, CMDL, CMDLB 65 50 25
HMDL, HMDLB, CHMDL, CHMDL 100 65 35
240V 480V 600VBreaker Type
IEC 60947-2 rms Sym. kA, 50/60 Hz
Icu Ics Icu Ics Icu Ics
MDL, MDLB, CMDL, CMDLB 65 65 50 50 20 10
HMDL, HMDLB, CHMDL, CHMDL 100 100 70 50 25 13
240V 380/415V 690VBreaker Type
Utilization Category A
UIMP= 8 kV
Interrupting Rating
Types MDL, HMDL, CMDL, and CHMDL Equipped with Type MES Digitrip RMS 310 Trip Units, Types MES3800LS and MES3800LSG
10 EATONwww.eaton.com
Time Current Curves TD012036ENEffective December 2015
Series CM-Frame
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6X
8X
4X
7X
3X
2X
Standard FixedRating Plug
100 ms
300 ms5X
TIMEINSECONDS
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
1HOUR
1MINUTE
2HOURS
CURRENT IN MULTIPLES OF RATING PLUG AMPERES (In)
.5
.5 20106. 8. 1
1.8.6
CURRENT IN MULTIPLES OF RATING PLUG AMPERES (In)
.7 .9 6 7 8 9
20102 6 7 8 9
Short DelayPickupSettings(Tolerance+10%)
Long Delay Minimum TotalClearing Time
Long Delay Maximum TotalClearing Time
.7 .9
Fixed InstantaneousOverride
InterruptingRatingDeterminesEnd ofCurve
10,000
.1
.01
1000
5000
4000
3000
2000
20,000
.001
SECONDS
CURRENT IN AMPS
30,000
40,000
50,000
100,000
.02
.03
.04
.05
200 ms
I
2 3 4 5
3 4 5
1.15
Figure 7. MDL, HMDL, CMDL, and CHMDL, types MES3800LSI and MES3800LSIG Curve Number - SC-6913-98, June 2007
Circuit Breaker Time/Current Curves (Phase Current)
Series C M-Frame Circuit Breakers
Equipped With Type MES Digitrip RMS 310 Trip Units
Catalog Types: MES3800LSI and MES3800LSIGDigitrip RMS 310 Trip Units for use
with Circuit Breaker Types MDL, HMDL, CMDL, CHMDL 3 Poles.
Adjustable Short Delay Time Typical Trip Unit Nameplate
Engaged
Remove
Cat.
In
Digitrip RMS 310 Rating Plug
Push to TripDigitrip RMS 310Trip Unit40oCAmbient
Test
5
7 3
2 8
4 6
Short DelayPickup x In
300
100
I
200
TimeMIsec
Notes:
Digitrip RMS 310 trip units are suitable for functional field testing with test kit Cat. No. STK2.For field testing using primary injection methods, follow NEMA AB4 publications.
Calibration response in short delay pick-up range is same for 1, 2 or 3 poles in series.
There is a memory effect that can act to shorten the long delay. The memory effect comesinto play if a current above the long delay pick-up value exists for a time and then is clearedby the tripping of a downstream device or the circuit breaker itself. A subsequent overloadwill cause the circuit breaker to trip in shorter time than normal. The amount of time delayreduction 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.
1 Curve accuracy applies from 20C to +55C ambient. For possible continuous ampere derating for ambient above 40C, refer to Eaton.
2 For high fault current levels a fixed instantaneous override is provided at 6800A. (Tolerance 15%).
3 The end of the curve is determined by the interrupting rating of the circuit breaker. See above tabulation.
4 Long delay pickup is 115% of In, +/- 5%.
800 Fixed 8MES800T 1600-6400
700 Fixed 8MES700T 1400-5600
600 Fixed 8MES600T 1200-4800
500 Fixed 8MES500T 1000-4000
400 Fixed 8MES400T 800-3200
400, 500, 600, 800 Adjustable A8MES800T1 800-6400
AmpereRating(In)
Available Rating Plugs
Type
Rating PlugCatalogNumber
Short DelayPickup RangeAmperes
UL/CSA rms Sym. kA, 50/60 Hz
MDL, MDLB, CMDL, CMDLB 65 50 25HMDL, HMDLB, CHMDL, CHMDL 100 65 35
240V 480V 600VBreaker Type
IEC 60947-2 rms Sym. kA, 50/60 Hz
Icu Ics Icu Ics Icu Ics
MDL, MDLB, CMDL, CMDLB 65 65 50 50 20 10
HMDL, HMDLB, CHMDL, CHMDL 100 100 70 50 25 13
240V 380/415V 690VBreaker Type
Utilization Category A
UIMP= 8 kV
Interrupting Rating
Types MDL, HMDL, CMDL, and CHMDL Equipped with Type MES Digitrip RMS 310 Trip Units, Types MES3800LSI and MES3800LSIG
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Ground Fault PickupSettings(Tolerance +10%Except 20% on1xIGSetting)
3xIG
1
4xIG
2xIG
1xIG
2 3 4 5 6 7 8 910 100
GROUND CURRENT-AMPERES
TIMEI
NSECONDS
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
1HOUR
1MIN
UTE
2HOURS
16000
GROUND CURRENT-IN MULTIPLES OF Ig= 160A
1600
960
800
640
480
320
160
1120
1280
1440
5xIG
I
500 ms
300 ms
150 ms
+
Figure 8. MDL, HMDL, CMDL, and CHMD Ground Fault Protection - Curve Number SC-6914-98, June 2007
Circuit Breaker Time/Current Curves (Ground Current)
Series C M-Frame Circuit BreakersEquipped With Type MES Digitrip RMS 310 Trip Unitsfor Ground Fault Protection
Catalog Types: MES3800LSG and MES3800LSIG Digitrip RMS 310 Trip Units for usewith Circuit Breaker Types MDL, KMDL, CMDL, CHMDL.
Engaged
Remove
Cat.
In
Digitrip RMS 310 Rating Plug
Push to TripDigitrip RMS 310Trip Unit40oCAmbient
Test
500
150
3004
2
1
3 5
Ig=160A
5
7 3
2 8
4 6
Short DelayPickup x In
I
Ground FaultPickup x Ig
TimeMIsec
300
100
I
200
TimeMIsec
Fixed Short Delay Time
Adjustable Short Delay Time
Typical Trip Unit Nameplate
Typical Trip Unit Nameplate
Engaged
Remove
Cat.
In
Digitrip RMS 310 Rating Plug
Push to TripDigitrip RMS 310Trip Unit40oCAmbient
Test
500
150
3004
2
1
3 5
Ig=160A
5
7 3
2 8
4 6
Short DelayPickup x In
I
Ground FaultPickup x Ig
TimeMIsec
Notes:
Curve accuracy applies from 20C to +55C ambient. For possible continuous ampere derating
for ambient above 40C, refer to Eaton.
Digitrip RMS 310 trip units are suitable for functional field testing with test kit Cat. No. STK2. Forfield testing using primary injection methods, follow NEMA publication (AB4).
Types MDL, HMDL, CMDL, and CHMDL Equipped with Type MES Digitrip RMS 310 Trip Units, Ground Fault Protection
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MaximumMinimum
Maximum SinglePole Trip Timesat 25oC 1
Adjustable Magnetic Trip
5X
10X+20% 10%
TypicalTrip UnitNameplate
100
50
30
20
10
5
3
2
1
.5
.3
.2
.1
.05
.03
.02
.01
.005
.003
.002
.001
TIMEINSECONDS
1,000
500
300
200
5,000
3,000
2,000
1HOUR
1MINUTE
2H
OURS
TIMEINSECONDS
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
1HOUR
1MINUTE
2HOURS
100
80
60
90
70
50
1000
800
600
900
700
500
400
300
200
10,
000
8000
6000
9000
7000
5000
4000
3000
2000
10,
000
8000
6000
9000
7000
5000
4000
3000
2000
1000
800
600
900
700
500
400
300
200
100
80
60
90
70
50
100,
000
80,0
00
60,0
00
90,0
00
70,0
00
50,0
00
40,0
00
30,0
00
20,0
00
Maximum Interrupting Time
CURRENT IN PERCENT OF BREAKER TRIP UNIT RATING (In)
CURRENT IN PERCENT OF BREAKER TRIP UNIT RATING (In)
Interrupting RatingDetermines End ofCurve
10,000
Individual Pole
Adjustments
ThermalMagneticTrip Unit
C Push to Trip
MagneticMultiples Of In
10
7.5
10 5
7.5
10 5
Amps(In)
Cat.No.40
oC
7.5
5
+
Circuit Breaker Time/Current Curves
Series C M-Frame Circuit Breakers
Equipped With Type MT Thermal-Magnetic Trip UnitCatalog Types: MDL, HMDL, MDLB, HMDLB Circuit Breakers, 2 and 3 Poles.
For application and coordination purposes only. Thermal calibration based on 40C ambient, coldstart. Connected with four (4) feet of rated wire (75C) per terminal. Tested in open air with
current in all poles. Instantaneous calibration based on single-pole tests.
Maximum Voltage:600V, AC (50/60 Hz) 250V, DC
Notes:
For additional in formation on the trip uni t, see IL 29C607.
1 Single pole data at 25C based on NEMA Procedures (AB 4) for verifying performance ofmolded case circuit breakers.
UL/CSA rms Sym. kA, 50/60 Hz kA, DC
MDL, MDLB 65 50 25 22
HMDL, HMDLB 100 65 35 25
240V 480V 600V 250VBreaker Type
IEC 60947-2 rms Sym. kA, 50/60 Hz kA, DC
Icu Ics Icu Ics Icu Ics
MDL, MDLB 65 65 50 50 20 10 20 10
HMDL, HMDLB 100 100 70 50 25 13 20 10
240V 380V 415V 250VBreaker Type
Utilization Category A
UIMP= 8 kV
Breaker Rating
Rated
Amperes (In)
Instantaneous Trip Amperes
(See Figure Below)
300 - 600 500 to 1000% of trip unit rating (DC values are approximately 40% higher)
Figure 9. MDL, HMDL, MDLB, and HMDLB, 300-600A - Curve Number SC-6911-98, June 2007
Types MDL, HMDL, MDLB, and HMDLB Equipped with Type MT Thermal-Magnetic Trip Unit, 300 to 600 Amperes
Interrupting Rating
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Time Current Curves TD012036EN
Effective December 2015
Series C
M-Frame
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MaximumMinimum
Maximum SinglePole Trip Timesat 25oC 1
Adjustable Magnetic Trip
TypicalTrip UnitNameplate
Individual PoleAdjustments
ThermalMagneticTrip Unit
Push to Trip
MagneticMultiples Of In
Amps(In)
Cat.No.
oC
100
50
30
20
10
5
3
2
1
.5
.3
.2
.1
.05
.03
.02
.01
.005
.003
.002
.001
T
IMEINSECONDS
1,000
500
300
200
5,000
3,000
2,000
1HOUR
1MINUTE
2HOURS
TIMEINSECO
NDS
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
1HOUR
1MINUTE
2H
OURS
100
80
60
90
70
50
1000
800
600
900
700
500
400
300
200
10,
000
8000
6000
9000
7000
5000
4000
3000
2000
10,0
00
8000
6000
9000
7000
5000
4000
3000
2000
1000
800
600
900
700
500
400
300
200
100
80
60
90
70
50
100,0
00
80,0
00
60,0
00
90,0
00
70,0
00
50,0
00
40,0
00
30,0
00
20,0
00
Maximum Interrupting Time
CURRENT IN PERCENT OF BREAKER TRIP UNIT RATING (In)
CURRENT IN PERCENT OF BREAKER TRIP UNIT RATING (In)
Interrupting RatingDetermines End ofCurve
10,000
8
6
4 8
6
4 8
6
4
4X
+
8X 10%20% +
Circuit Breaker Time/Current CurvesSeries C M-Frame Circuit Breakers
Equipped With Type MT Thermal-Magnetic Trip Unit
Catalog Types: MDL, HMDL, MDLB, HMDLB Circuit Breakers, 2 and 3 Poles.
For application and coordination purposes only. Thermal calibration based on 40C ambient, cold
start. Connected with four (4) feet of rated wire (75C) per terminal. Tested in open air with
current in all poles. Instantaneous calibration based on single-pole tests.
Maximum Voltage:600V, AC (50/60 Hz) 250V, DC
Notes:
For additional information on the trip uni t, see IL 29C607.
1 Single pole data at 25C based on NEMA Procedures (AB 4) for verifying performance ofmolded case circuit breakers.
UL/CSA rms Sym. kA, 50/60 Hz kA, DC
MDL, MDLB 65 50 25 22
HMDL, HMDLB 100 65 35 25
240V 480V 600V 250VBreaker Type
IEC 60947-2 rms Sym. kA, 50/60 Hz kA, DC
Icu Ics Icu Ics Icu Ics
MDL, MDLB 65 65 50 50 20 10 20 10
HMDL, HMDLB 100 100 70 50 25 13 20 10
240V 380V 415V 250VBreaker Type
Utilization Category A
UIMP= 8 kV
Breaker Rating
Rated
Amperes (In)
Instantaneous Trip Amperes
(See Figure Below)
700 - 800 400 to 800% of trip unit rating (DC values are approximately 40% higher)
Figure 10. MDL, HMDL, MDLB, and HMDLB, 700-800A - Curve Number SC-6912-98, June 2007
Types MDL, HMDL, MDLB, and HMDLB Equipped with Type MT Thermal-Magnetic Trip Unit, 700 and 800 Amperes
Interrupting Rating
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Eaton1000 Eaton BoulevardCleveland, OH 44122United StatesEaton.com
2014 EatonAll Rights ReservedPrinted in USAPublication No. TD012036EN / KDCApril 2014
Eaton is a registered trademark.
All other trademarks are propertyof their respective owners.
Series CM-Frame
Time Current Curves TD012036ENEffective December 2015