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Student Resource Building Clement Fung University of California Santa Barbara Lighting | Electrical Option

APPENDIX E

Electrical System Single Line Diagram

Overcurrent Protection Study

Overcurrent Protection Device Specifications

Ove

rcur

rent

Pro

tect

ion

and

Coo

rdin

atio

n

Bre

aker

Rat

ing

(A)

% o

f Rat

ed C

urre

ntA

ctua

l Cur

rent

(A)

Tim

e(s)

Act

ual C

urre

nt (A

)Ti

me(

s)A

ctua

l Cur

rent

(A)

Tim

e(s)

Act

ual C

urre

nt (A

)Ti

me(

s)A

ctua

l Cur

rent

(A)

Tim

e(s)

100

1200

1000

050

1000

060

1000

010

010

000

200

1000

020

024

0075

100

7012

045

200

4040

045

300

3600

3515

015

180

1030

012

600

1740

048

0018

200

624

05

400

4.5

800

650

060

0012

250

3.5

300

350

02

1000

460

072

007

300

236

02

600

0.8

1200

2.5

800

9600

440

00.

948

00.

780

00.

035

1600

1.5

Bre

aker

Rat

ing

(A)

% o

f Rat

ed C

urre

ntA

ctua

l Cur

rent

(A)

Tim

e(s)

Act

ual C

urre

nt (A

)Ti

me(

s)A

ctua

l Cur

rent

(A)

Tim

e(s)

100

400

1000

034

510

000

150

1000

020

080

015

069

070

300

120

300

1200

4010

3530

450

4040

016

0018

1380

1760

020

500

2000

1017

2510

750

9.5

600

2400

720

706

900

5.2

800

3200

0.03

2760

0.04

1200

0.04

Tran

sfor

mer

T1A

(prim

ary)

400

800

150

Feed

er to

H1A

Feed

er to

Pan

el L

1Aa

Tran

sfor

mer

T1A

(sec

onda

ry)

Mai

n S

witc

hboa

rd (M

S)

Pan

el H

3Aa

Pan

el H

2AP

anel

H1A

1200

100

200

5060

Tim

e-C

urre

nt C

urve

s Fo

r Bra

nch

Circ

uit P

rote

ctio

n"P

ath

B-C

-D-E

"

0.010.

1110100

1000

1000

0

1010

010

0010

000

Cur

rent

(A)

Time (Seconds)

1200

A10

0A20

0A60

A50

A

Tim

e-C

urre

nt C

urve

s Fo

r Bra

nch

Circ

uit P

rote

ctio

n"P

ath

B-1

-2"

0.010.

1110100

1000

1000

0

1010

010

0010

000

Cur

rent

(A)

Time (Seconds)

1200

A40

0A80

0A15

0A

AB DE-ION Circuit Breakers

Application Data29-167N

Page 3

October 1997

Curve No. SC-5376-92A

Types ND, CND, HND, CHND, NDC, CNDC Equipped With Type NES Digitrip RMS 310 TripUnits With Adjustable Short Time Delay (Phase Protection)

.1

.01

.001

.05

.03

.02

.005

.003

.002

6X

8X

4X

7X

3X

2X

Standard FixedRating Plug

200 MS

100MS

I

300 MS

5X

TIM

E IN

SEC

ONDS

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 H

OU

R1

MIN

UT

E2

HO

UR

S

SECO

NDS

CURRENT IN MULTIPLES OF RATING PLUG AMPERES (In)

.5

.5 201054321.8.6

1.8.6

100,

000

10,0

00

50,0

00

40,0

00

30,0

00

20,0

00

200,

000

CURRENT IN AMPS


60,0

0070

,000

80,0

0090

,000

.7 .9 6 7 8 9

20105432 6 7 8 9

Short DelayPick UpSettings(Tolerance±10%)

Long Delay➀Minimum TotalClearing Time

Long Delay➀Maximum TotalClearing Time

Fixed InstantaneousOveride➁

InterruptingRatingDeterminesEnd of Curve➂

.7 .9

➀

NotesCurve accuracy applies from -20°C to +55°C ambient. For possible ampere derating for ambientabove 40°C, refer to Cutler-Hammer.

Digitrip RMS 300 trip units are suitable for functional field testing with test kit Cat. No. STK2. Forfield testing using primary injection methods, follow NEMA publication AB-4-1991.

For ground fault time-current curves see SC-5377-92A.

➁

➂

➃

FrameRatingAmperes(Max.)

Available Rating PlugsAmpereRating (In)

800 700 630 600 550 500 450 400 400, 500, 600, 800 400, 500, 630, 80012001000 900 800 700 630 600 600, 800, 1000, 1200

FixedFixedFixedFixedFixedFixedFixedFixedAdj.Adj.FixedFixedFixedFixedFixedFixedFixedAdj.

8NES800T8NES700T8NES630T➃8NES600T8NES550T8NES500T8NES450T8NES400TA8NES800T1A8NES800T2➃12NES1200T12NES1000T12NES900T➃12NES800T12NES700T12NES630T➃12NES600TA12NES1200T1

1600-64001400-56001260-50401200-48001100-44001000-4000

900-3600800-3200800-6400800-6400

2400-96002000-80001800-72001600-64001400-56001260-50401200-48001200-9600

Type CatalogNumber

Short DelayPickup RangeAmperes

800

1200

Interrupting Ratings – 50/60 HzRMS Sym. Amperes (kA)

BreakerType

ND, CNDHND, CHNDNDC, CNDC

65100200

65100200

5065

100

253550

5065

100

UL/CSA240V 480V 600V

IEC 947-2220-240V 380-415V

ICS = .25 ICUICW = 15 kA @ .5SUimp = 8kV

Digitrip RMS 310Trip Unit

40°C Ambient

Short DelayPickup

5

73

2 8

4 6 TEST

RemoveEngaged

Pushto

Trip

Digitrip RMS 310 Rating Plug

Cat.–/n–

“Y”x In

Typical Trip Unit NameplateAdjustable Short Time Delay

Circuit Breaker Time/Current Curves (Phase Current)Series C® N-Frame Circuit BreakersEquipped With Type NES Digitrip RMS 310 Trip UnitsThe NES Digitrip RMS 310 Trip Units are AC only devices that employ microprocessorbased technology that provides true RMS current sensing means for proper correlationwith thermal characteristics of conductors and equipment. They are used with CircuitBreaker Types ND, CND, HND, CHND, NDC, and CNDC.

There is a memory effect that can act to shorten the long delay. The memory effect comes intoplay if a current above the long delay pick up value exists for a time and then is cleared by thetripping of a downstream device or the circuit breaker itself. A subsequent overload will causethe circuit breaker to trip in shorter time than normal. The amount of time delay reduction isinverse to the amount of time that has elapsed since the previous overload. Approximately fiveminutes is required between overloads to completely reset the memory.

For high fault current levels a fixed instantaneous override is provided at 14000A (Tolerance±15%).

The end of the curve is determined by the interrupting rating of the circuit breaker. See abovetabulation.

Not UL/CSA Listed.


Application Data29-167N

Page 2

October 1997


Types ND, CND, HND, CHND, NDC, CNDC Equipped With Type NES Digitrip RMS 310 TripUnits With I2t Ramp Short Time Delay (Phase Protection)

6X

8X

4X

7X

2X

Long Delay➀Minimum TotalClearing Time

Long Delay➀Maximum TotalClearing Time

Standard FixedRating Plug

Short DelayPick UpSettings(Tolerance± 10%)

5X

3X


.5

.5

TIM

E IN

SEC

ONDS

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 H

OU

R1

MIN

UT

E2

HO

UR

S

201054321.8.6

1.8.6

100,

000

.1

.01

10,0

00

50,0

00

40,0

00

30,0

00

20,0

00

200,

000

.001

SECO

NDS

CURRENT IN AMPS


60,0

0070

,000

80,0

0090

,000

.7 .9 6 7 8 9

20105432 6 7 8 9

.05

.03

.02

.005

.003

.002

Fixed InstantaneousOveride➁

InterruptingRatingDeterminesEnd of Curve➂

Typical Trip Unit Nameplate

.7 .9

FrameRatingAmperes(Max.)

Available Rating PlugsAmpereRating (In)

800 700 630 600 550 500 450 400 400, 500, 600, 800 400, 500, 630, 80012001000 900 800 700 630 600 600, 800, 1000, 1200

FixedFixedFixedFixedFixedFixedFixedFixedAdj.Adj.FixedFixedFixedFixedFixedFixedFixedAdj.

8NES800T8NES700T8NES630T➃8NES600T8NES550T8NES500T8NES450T8NES400TA8NES800T1A8NES800T2➃12NES1200T12NES1000T12NES900T➃12NES800T12NES700T12NES630T➃12NES600TA12NES1200T1

1600-64001400-56001260-50401200-48001100-44001000-4000

900-3600800-3200800-6400800-6400

2400-96002000-80001800-72001600-64001400-56001260-50401200-48001200-9600

Type CatalogNumber

Short DelayPickup RangeAmperes

800

1200

Interrupting Ratings – 50/60 HzRMS Sym. Amperes (kA)

BreakerType

ND, CNDHND, CHNDNDC, CNDC

65100200

65100200

5065

100

253550

5065

100

UL/CSA240V 480V 600V

IEC 947-2220-240V 380-415V

ICS = .25 ICUICW = 15 kA @ .5SUimp = 8kV

NotesCurve accuracy applies from -20°C to +55°C ambient. For possible ampere derating for ambientabove 40°C, refer to Cutler-Hammer.

Digitrip RMS 300 trip units are suitable for functional field testing with test kit Cat. No. STK2. Forfield testing using primary injection methods, follow NEMA publication AB-4-1991.

For ground fault time-current curves see SC-5377-92A.

➀

➁

➂

➃

I2t Ramp Short Time Delay

There is a memory effect that can act to shorten the long delay. The memory effect comes intoplay if a current above the long delay pick up value exists for a time and then is cleared by thetripping of a downstream device or the circuit breaker itself. A subsequent overload will causethe circuit breaker to trip in shorter time than normal. The amount of time delay reduction isinverse to the amount of time that has elapsed since the previous overload. Approximately fiveminutes is required between overloads to completely reset the memory.

For high fault current levels a fixed instantaneous override is provided at 14000A (Tolerance±15%).

The end of the curve is determined by the interrupting rating of the circuit breaker. See abovetabulation.

Not UL/CSA Listed.

Circuit Breaker Time/Current Curves (Phase Current)Series C® N-Frame Circuit BreakersEquipped With Type NES Digitrip RMS 310 Trip UnitsThe NES Digitrip RMS 310 Trip Units are AC only devices that employ microprocessorbased technology that provides true RMS current sensing means for proper correlationwith thermal characteristics of conductors and equipment. They are used with CircuitBreaker Types ND, CND, HND, CHND, NDC, and CNDC.

Digitrip RMS 310Trip Unit

40°C Ambient

Short DelayPickup

5

73

2 8

4 6 TEST

RemoveEngaged

Pushto

Trip

Digitrip RMS 310 Rating Plug

Cat.–/n–

“Y”x In


October 1997

Application Data29-167L

Page 2

Types LDB, LD, HLD Equipped With Type LT Thermal-Magnetic Trip Unit

Curve No. SC-4547-89B

MaximumMinimum

Maximum SinglePole Trip Timesat 25°C 1

Adjustable Magnetic Trip

5X 10X±20% ±10%

TypicalTrip UnitNameplate

Individual PoleAdjustments

ThermalMagneticTrip Unit

C Push to Trip

MagneticMultiples Of In

10

7.5

10 5

7.5

10 5

Amps(In)

Cat.No.40°C

7.5

5

Circuit Breaker Time/Current Curves

Series C® L-Frame Circuit BreakersEquipped With Type LT Thermal-Magnetic Trip Unit

Catalog Types LDB, LD, HLD Circuit Breakers, 2, 3 and 4 Poles

For application and coordination purposes only. Thermal calibrationbased on 40°C ambient, cold start. Connected with four (4) feet ofrated wire (75°C) per terminal. Tested in open air with current in allpoles. Instantaneous calibration based on single-pole tests.

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

Breaker RatingRated Amperes (In)

Interrupting Rating

UL/CSARMS Sym. kA, 50/60 Hz.

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

➀

240 V.

BreakerType

LDBLDHLD

Utilization Category AUIMP = 8 kV

Instantaneous Trip Amperes(See Figure Below)

480 V. 600 V. 250 V.

101020

IEC 947-2RMS Sym. kA, 50/60 Hz.

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

kA, Dc

kA, Dc

Icu Ics Icu Ics Icu Ics Icu Ics

LDBLDHLD

65 17 40 10 40 10 10 365 17 40 10 40 10 10 3

100 25 65 17 65 17 20 5

Note: For additional information on the trip unit, see IL 29C606.

300, 350, 400,500, 600

500 to 1000% of trip unit rating (Dc valuesare approximately 40% higher)

65 35 2565 35 25

100 65 35

100

50

30

20

10

5

3

2

1

.5

.3

.2

.1

.05

.03

.02

.01

.005

.003

.002

.001

TIME IN

SECONDS

1,000

500

300

200

5,000

3,000

2,000

1 HOUR1 M

INUTE

2 HOURS

TIM

E IN

SEC

ONDS

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 HO

UR1

MIN

UTE

2 HO

URS

100

8060 907050 1000

800

600

900

700

500

400

300

200

10,0

00

8000

6000

9000

7000

5000

4000

3000

2000 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

10,0

00

8000

6000

9000

7000

5000

4000

3000

2000

100080

0

600

900

700

500

400

300

200

1008060 907050

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

Technical DataEffective: May 1999 Page 1

AD 29-167F

Cutler-Hammer

Maximum SinglePole Trip Timesat 25°C ➁

➀

MaximumTrip Time

MinimumTrip Time

175 A

200 A

225 A

➂

➃

100

50

30

20

10

5

3

2

1

.5

.3

.2

.1

.05

.03

.02

.01

.005

.003

.002

.001

TIME IN SECONDS

1,000

500

300

200

5,000

3,000

2,000

1 HO

UR

1 MIN

UT

E2 H

OU

RS

TIM

E IN

SEC

ONDS

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 H

OU

R1

MIN

UT

E2

HO

UR

S

175-225A

➀➁

➂➃

Circuit Breaker Time/Current CurvesMolded-Case Circuit BreakersCatalog Types FD/HFD Circuit Breakers, Two, Three and Four PolesFor application and coordination purposes only.Based on 40˚C ambient, cold start. Connected with four (4) feet of ratedwire (75˚C) per terminal. Tested in open air with current in all poles.

Maximum AC Volts: 690 at 50/60 HzMaximum DC Volts: 250

Breaker RatingIn Amperes Instantaneous Pick-up, Amperes RMS175 2400200 2400225 2400

BreakerType

Symmetrical RMS Amperes (kA), Icu

FDHFD

Fixed Inverse – Time Overcurrent Release.Single Pole Test Data at 25°C based on NEMA Procedures (AB 4-1991)for verifying performances of Molded Case Circuit Breakers.Total Operation Time.Interrupting Rating Determines End of Curve.In this interruption region:

The curve is drawn for In = 200A. For In ≠ 200A, the end points in thisregion are displaced along the current-axis by a factor (200A/In)

240 Vac

Interrupting Ratings

65100

480 Vac

2565

600 Vac

1825

250 Vac

1022

CURRENT IN MULTIPLES OF In

CURRENT IN MULTIPLES OF In

Notes:

1 86 975432 10 8060 907050403020

1000800

600

900

700

500

400

300

200

100

1 86 975432 10 8060 907050403020 1000

800

600

900

700

500

400

300

200

100

Page 36a


Types FD and HFD 225 Amperes AB DE-ION Circuit Breakers

Application Data29-167F

Page 36


October 1997

Types FDB, FD and HFD 150 Amperes


MaximumMinimum



150A

InterruptingRatingDeterminesEnd of Curve(See Above)

1

100

50

30

20

10

5

3

2

1

.5

.3

.2

.1

.05

.03

.02

.01

.005

.003

.002

.001

TIME IN SECONDS

1,000

500

300

200

5,000

3,000

2,000

1 HO

UR

1 MIN

UT

E2 H

OU

RS

CURRENT IN AMPERES

1000

0

8000

6000

9000

7000

5000

4000

3000

2000

1000800

600

900

700

500

400

300

200

1008060 907050403020109875 6

TIM

E IN

SEC

ONDS

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 H

OU

R1

MIN

UT

E2

HO

UR

S

CURRENT IN AMPERES

1000

0

8000

6000

9000

7000

5000

4000

3000

2000

1000

800

600

900

700

500

400

300

200

100

8060 907050403020109875 6


Series C® F-Frame Circuit Breakers

Catalog Types EHD, FDB, FD and HFD Circuit Breakers, Two, Three andFour Poles

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

Maximum AC Volts: 600 at 60 HzMaximum DC Volts: 250

Breaker RatingContinuous Amperes Instantaneous Trip Amperes150 Amps See Curve

Interrupting Rating (UL/CSA Listed)BreakerType

Symmetrical RMS Amperes (KA) Amps (KA)@ 240 V., Ac @ 480 V., Ac @ 600 V., Ac 250V., Dc

1865

100

FDBFDHFD

142565

141825

101022

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


Page 32


October 1997

Types EHD, FDB, FD and HFD 100 Amperes


MaximumMinimum



100A


1

100

50

30

20

10

5

3

2

1

.5

.3

.2

.1

.05

.03

.02

.01

.005

.003

.002

.001

TIME IN SECONDS

1,000

500

300

200

5,000

3,000

2,000

1 HO

UR

1 MIN

UT

E2 H

OU

RS

CURRENT IN AMPERES

1000

0

8000

6000

9000

7000

5000

4000

3000

2000

1000800

600

900

700

500

400

300

200

1008060 907050403020109875 6

TIM

E IN

SEC

ONDS

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 H

OU

R1

MIN

UT

E2

HO

UR

S

CURRENT IN AMPERES

1000

0

8000

6000

9000

7000

5000

4000

3000

2000

1000

800

600

900

700

500

400

300

200

100

8060 907050403020109875 6







Interrupting Rating (UL/CSA Listed)BreakerType


181865

100

EHDFDBFDHFD

14142565

--141825

10101022



Page 28


October 1997



Minimum Maximum




60A

1

BreakerType


181865

100

EHDFDBFDHFD

14142565

--141825

10101022

100

50

30

20

10

5

3

2

1

.5

.3

.2

.1

.05

.03

.02

.01

.005

.003

.002

.001

TIME IN SECONDS

1,000

500

300

200

5,000

3,000

2,000

1 HO

UR

1 MIN

UT

E2 H

OU

RS

CURRENT IN AMPERES

1000

0

8000

6000

9000

7000

5000

4000

3000

2000

100080

0

600

900

700

500

400

300

200

1008060 907050403020109875 6

TIM

E IN

SEC

ONDS

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 H

OU

R1

MIN

UT

E2

HO

UR

S

CURRENT IN AMPERES

1000

0

8000

6000

9000

7000

5000

4000

3000

2000

1000

800

600

900

700

500

400

300

200

100

8060 907050403020109875 6







Interrupting Rating (UL/CSA Listed)



Page 27


October 1997



Minimum Maximum




50A

1

BreakerType


181865

100

EHDFDBFDHFD

14142565

--141825

10101022

100

50

30

20

10

5

3

2

1

.5

.3

.2

.1

.05

.03

.02

.01

.005

.003

.002

.001

TIME IN SECONDS

1,000

500

300

200

5,000

3,000

2,000

1 HO

UR

1 MIN

UT

E2 H

OU

RS

CURRENT IN AMPERES

1000

0

8000

6000

9000

7000

5000

4000

3000

2000

100080

0

600

900

700

500

400

300

200

1008060 907050403020109875 6

TIM

E IN

SEC

ONDS

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 H

OU

R1

MIN

UT

E2

HO

UR

S

CURRENT IN AMPERES

1000

0

8000

6000

9000

7000

5000

4000

3000

2000

1000

800

600

900

700

500

400

300

200

100

8060 907050403020109875 6







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Student Resource Building Clement Fung University of ... E.pdffield testing using primary injection...

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