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910

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8090

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.02

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.09.1

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.91

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8

910

20

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40

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8090

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1000900

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80009000

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1M

INU

TE

2H

OU

RS

TIM

EIN

SE

CO

ND

S1

HO

UR

Maximum TotalClearing Time

Ir

7

Curve Number: TC01207012EPrinted in U.S.A. May 2008

Available Short DelayPick Up Settings

(See Notes 7 and 10)

2

Circuit Breaker Time/Current Curves (Phase Current)

250A400A600A630A

Current in Multiples of ( )Ir

Current in Multiples of ( )Ir

1 2 3 4 5 7 10 20 30 40 50 70 100.5 .7

1 2 3 4 5 7 10 20 30.5 .7

8

Long Delay Response & Short Delay with I2 T Response Curve &

I2T Trip Style

I2T Short Delay

Minimum Total

(See Note 8)

Clearing Time

10

5

4

.15

.24

6

.

3

1.15

67 ms

SERIES G L - Frame Circuit Breakers

Catalog Types: LGC, LGU, LGX, GLE, GLS, GLH, GLC, GLU, GLX, LGE, LGS

Available Sensors ( n):I

Curves in this Family:

Long Delay Response and Short Delay with Flat Response - TC01207004E

Long Delay Response and Short Delay with I t Response - TC01207005E

Ground Fault Response Curve - TC01207006E______________________________________________________________

Long Delay Response and Short Delay with Flat Response and Instantaneous / Maintenance Mode Setting - TC01207011E

Long Delay Response and Short Delay with I t Response and Instantaneous / Maintenance Mode Setting - TC01207012E

Ground Fault Response Curve and Instantaneous / Maintenance Mode Setting - TC01207013E

Instantaneous / Maintenance Mode Setting - TC01207014E

Legend for Time Current Curves for Series G L- Frame Circuit Breakers - 5722B41

2

2

2-8, 10 & 12 X 5%I +r

12

12

712

See Note 9

4

.

.

.

Notes:

1. Curve accuracy applies from -20° C to + 55 °C ambient. Temperatures above + 85 °C cause an over-temperatureprotection trip. For possible continuous ampere derating for ambient above 40 °C, refer to Cutler-Hammer.

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 isquickly reset, the memory cap will still have charge and a subsequent overload will cause the breaker to trip in ashorter time than normal. The amount of time delay reduction is inverse to the amount of time that has elapsed sincethe 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 Pick Up = 115% of r).Range is 110 - 120%.

6. Total clearing times shown include the response times of the trip unit, the breaker opening, and the interruption ofthe current.

7. The Short Delay Pick Up has nine settings/positions; 2-8, 10 and 12.

8. Short Delay I2T band has a tolerance of 15%.

9. Breakpoint back to FLAT response occurs @ 8x r for upper line of the I2T curve.

I

I

+

In 250A 400A 600A 630AIr

A 100A 160A 250A 250AB 125A 200A 300A 300AC 150A 225A 315A 315AD 160A 250A 350A 350AE 175A 300A 400A 400AF 200A 315A 450A 500AG 225A 350A 500A 600AH 250A 400A 600A 630A

Instantaneous/Maintenance Mode Setting

2

Long Delay Response & Short Delay with I2 T Response Curve &

Instantaneous/Maintenance Mode Setting

& LGH Circuit Breakers, 3 & 4 Poles

2,4,7,10,12,15,20,24 sec.Available Long Delay Time:

Shown @ 6x

2,4,7,15,24seconds +0/-30%