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Application Data

29-167J

Page 2

AB DE-ION Circuit Breakers

December 1998

Series C Types JDB, JD, HJD Equipped With Type JT Thermal-Magnetic Trip Unit

Curve No. SC-4247-87C

Maximum

(125-225A)

Adjustable Magnetic Trip

5X20% 10%

10X

(250A)

(70-100A)

Interrupting RatingDetermines Endof Curve

TypicalTrip UnitNameplate

Individual PoleAdjustments

Maximum Single PoleTrip Times at 25C

ThermalMagneticTrip Unit

C Push to Trip

MagneticMultiples Of In

10

7.5

10 5

7.5

10 5

Amps(In)

Cat.No.40C

7.5

5

Minimum

Circuit Breaker Time/Current Curves

Series CJ -Frame Circuit BreakersEquipped with Type J T Thermal-Magnetic Trip Unit

Catalog Types J DB, J D, HJ D Circuit Breakers, 2, 3 and 4 Poles

For application and coordination purposes only. Thermal calibrationbased on 40C ambient, cold start. Connected with four (4) feet ofrated wire (60C up to 125 amps, 75C above 125 amps) per terminal.Tested in open air with current in all poles. Instantaneous calibrationbased on single-pole tests.

Maximum Voltage600 V., Ac (50/60 Hz.)250 V., Dc

Breaker RatingRated Amperes (In)

Single pole test data at 25C based on NEMA Procedures(AB 4-1991) for verifying performance of molded case circuitbreakers.

Note:For additional information on the trip unit, see IL 29C600.

Interrupting Rating

Instantaneous Trip Amperes(See Figure Below)

70, 90, 100,125, 150, 175,200, 225, 250

500 to 1000% of tri p unit rating. (Dc valuesare approximately 40% higher)

UL/CSA

RMS Sym. kA, 50/60 Hz.240 V.

BreakerType

J DBJ DHJ D

480 V. 600 V. 250 V.

101022

IEC 157-1 (P1)

RMS Sym. kA, 50/60 Hz.

240 V., (Ue) 380 V., (Ue) 415 V., (Ue) 250 V., (Ue)

kA, Dc

kA, Dc

6565

100

353565

181825

101022

6565

100

353565

353565

J DBJ DHJ D

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

2HOURS

TIMEINSECONDS

10,000

100

50

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

10,0

00

8000

6000

9000

7000

5000

4000

3000

2000

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

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)

10,000

30

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