air circuit breakers - gistargistar.ru/pdf/acb.pdf · 33 introduction sfa and sda series air...

Air Circuit Breakers

www.sigmaelektrik.com

Do not risk your safety!


33

IntroductionSFA and SDA series air circuit breaker is suitable for the circuit of AC 50Hz/60Hz with rated service voltage 400V, 690V and rated service current up to 4000A. It is mainly used to distribute electric energy and protect circuits and electric equipment against over-load, under-voltage, short-circuit and single-phase earthing fault. With intelligentized and selective protection functions, the breaker can improve the reliability of power supply, and avoid unnucessary power failure. The breaker is applicable for power stations, foctories, mines (for 690V) and modernhigh-buildings, especially for the distribution system of intelligentized building.

Main FeaturesAccording to the mounting: fixed and draw-outAccording to the poles: three poles, four polesAccording to the operation ways: motor and manuel

Operation ConditionsAmbient air temperature

a) Maximum not exceed +40°Cb) Minumum not lower than -5°Cc) 24h average value not exceed +35°C

Note: Ambient air temperature is -10°C or -25°C and users should declare to manufacturer when put the order; ambient working condition is between -25°C and +40°C. User should negotiate with manufacturer.

Elevation ≤ 2000M

Atmosphere condition: relative humidity is not exceeding 50% at the maximum ambient temperature of +40°C With lower temperature, higher humidity would be permitted, but the lowest average tempature in a month not exceeding +25°C during the moistest month, and the maximum monthly average relative humidity not exceeding 90% in that month,and giving consideration to the dews on the goods surface, which would appear due to temparature change.

ACBAir Circuit BreakersACBACB

ACBACB


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Technical Specifications

Type SDA 2000/ SFA 2000 SDA 3200/ SFA 3200 SDA 4000/ SFA 4000Kind Of Assembly Drawout/Fixed Drawout/Fixed Drawout/Fixed

No Of Poles 3-4 3-4 3-4

Electrical Specifications

Rated Current at 40°C A 1600,2000 2500,3200 4000

Rated Voltage Ue V AC 415 415 415

Rated Insulation Voltage Ui V 750 750 1000

Rated Impulse Withstand Voltage Uimp kV 8 8 8

Rated Short-circuit Breaking Capacity

Rated Ultimate Short-circuit Breaking Capacity Icu kA690 V AC 50 65 65

415 V AC 80 100 100

Rated Service Short-circuit Breaking Capacity Ics kA690 V AC 40 50 50

415 V AC 50 65 65

Category A,B A,B A,B

Pollution degree 3 3 3

Electrical life ope. 415 V 1000 500 500

Mechanical life ope. 10000 5000 5000

Tripping Unit Electronic Electronic Electronic

Long-time delay current Ir A (0,4-1)xIn (0,4-1)xIn (0,4-1)xIn

Action time at 1.5xIn Tr sn15,20,25,30,40,5060, 80,100,120,160200, 240,320,480

15,20,25,30,40,50,60, 80,100,120,160,

200, 240,320,480

15,20,25,30,40,50,60, 80,100,120,160,

200, 240,320,480

Short-Time Delay Current Im A (0,4-15)xIn (0,4-15)xIn (0,4-15)xIn

Short-Time Delay Time sn0,1-0,2-0,3-0,4-0,5-

0,6-0,7-0,8-0,9-1-OFF0,1-0,2-0,3-0,4-0,5-

0,6-0,7-0,8-0,9-1-OFF0,1-0,2-0,3-0,4-0,5-0,6-

0,7-0,8-0,9-1-OFF

Instantaneous Current Ii A In...50 kA +OFF In...50 kA +OFF In...50 kA +OFF

Earth Fault Current Ie A (0,2-0,8)xIn+OFF (0,2-0,8)xIn+OFF (0,2-0,8)xIn.OFF

Ambient Temp.

Max. Operatioanal Ambient Temperature °C From -25 to +70 From -25 to +70 From -25 to +70

Max. Storage Temperature °C From -40 to +80 From -40 to +80 From -40 to +80

Dimensions

W mm 335/318 395/378 510

H mm 432/402 432/402 432

D mm 501/322 421/322 487

Weight kg 74/45 95/53 119/73

Accessories

Shunt Trip coil ( 230 V AC) On Request On Request On Request

Undervoltage Coil (230 V AC) On Request On Request On Request

Closing Coil ( 230 V AC) On Request On Request On Request

Aux. Contact ( 2NO+2NC) Standard Standard Standard

Motor Operator ( 230 V AC) On Request On Request On Request

Mechanical Interlock On Request On Request On Request

ACMIDPAVACB ACBAir Circuit Breakers Air Circuit Breakers


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Current ratingsRange(Ir1)

Error Current Actions Time Time Error

(0.4~1)In ±10%

≤1.05Ir1 <2h Non-trip

˃1.30Ir1 <1h trip

1.51 Ir1 (setting time) 15 30 60 120 240 480 ±10%2.0Ir1 8.4 16.9 33.7 67.5 135 270 ±10%



(1~15)Ir1+OFF (OFF Position) ±10%

≤0.9Ir2 Non-trip

˃1.10Ir2 Delayed-trip

Time setting (ts) 0.1 0.2 0.3 0.4 ±15%Returnable Time 0.06 014 0.23 0.35 ±15%



(0.2~0.8)In+OFF (OFF Position)

(NA1-2000,min160A)±10%

≤0.9Ir2 Non-tripping

˃1.10Ir2 Tripping

Setting time (Tg) 0.1 0.2 0.3 0.4 ±15%Returnable time 0.06 014 0.23 0.35 ±15%

Phase N Overload and Over-Current Characteristic

Overload long time-delay protection

Short-circuit short-delay protection

Short-circuit instantaneous protection

Single phase earth fault protection technical data:

100% or 50% (Applicable to 3p+N or 4P)

Current Ratings Range(Ir3) Error Current Action Characteristic1.0 In~50A/75kA/100A

+OFF (OFF Position)± 15%

≤0.85lr3 Non-trip

˃1.15lr3 trip

Intelligent Controller Functions



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30 40 50 60 70 80 100.2 .3 .4 .5 .6 .8 1 2 3 4 5 6 8 10 20 x ln

t (a)

kA

10000

5000

2000

1000

500

200

100

50

20

10

5

2

1

0.5

0.2

0.1

0.05

0.02

0.01

Ir1=(0. 4~1)In

Tr=(15~480)s

I2toff

Ir2=(I.0~I5)Irl

0.4s

0.3s

0.2s

0.1s

Ir3=1.0In~50kA/75kA/100kA

Time-Current Characteristics Curves

1000

500

100

50

20

10

5

2

1

0.5

0.2

0.1

0.05

0.02

0.01

Ir4=(0.2~0.8)In

xln

t(s)

.05 .06 .08 .1 .2 .3 .4 .5 .6 .8 1 2 3 4 5 6 8 10 20 30

0.4s

0.3s

0.2s

0.1s

0.4s

0.3s

0.2s

0.1s

Over-current protection characteristic curve

Earth fault protection characteristic curve

The earth fault protection has definite time-delay characteristic with the failure delayed time no less than the definite time-delay time setting



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Control Circuit

MainCircuit Asistant Switch

DF

Q F X M

DF

SB1

SB1

SB3

SA

26864

0 0

2

AC380VAC220VVorking powersupply

1

(-)(+)

U1 (+) U2 (-)

3/46/8

28

259753 27 29 31 33 35 36 38 39 41 42 44 45 47

30 32 34 37 40 43 46

power supply

offStored energy

main circuit

power supply

*DC220V DC110V

Processing

Unit

Intelligent Controller

closeAllident

Sb1 shurt button (prepared by user)

Sb2 under-vottage button (prepared by user)

SB3 swich-on button (prepared by user)

DF auxiliary contect

F shurt relaase

SA motor microphonic

X swich-on electric magnet

M stored energy motor

XT wiring terminal

Q under-voltage release or under-voltage delay release

O always-open contact

O signal lamp (prepared by user)



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Control Circuit

Examples

The busbars should be suitably adjusted to ensure the connection points are positioned on the terminals before the bolts are inserted B the connections are held by the supporter which is fixed to the framework of the swich board, in this way the circuit breaker terminals do not have to support its weight C. (This support should be placed close to the terminals).

Correct clamping of busbars depends on the tightening torques used for the nuts and bolts,etc Over-tightening may have the same consequences as under-tightening.

For connecting busbars to the circuit breaker, the tightening torques to be used are shown in the table below.These values are for use with copper busbars and steel nuts and bolts, class 8.8.

Preferred tightening torque for NA1's tightening componets

Type Of Screw Application Preferred Tightening TorqueM4 Screws For Secondary Terminals 11 Nm

M10 Installing Bolts Of Air Circuit Breaker 45 NmM12 Connection Terminals 50 Nm

B BC

5

1

1 breaker terminal

2 busbar

3 bolt

4 washer

5 nut

2 3 4



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Recommendation for user's connecting bus-bar

Note: The specifications in the table is obtanied as the ambient tempature of air circuit breaker is 40°C, with open installations; this is in compliance with the specication of copper busbars adopted under the heating conditions regulated in IEC/EN60947-2.

Connected Position Test Position Disconnected Position Drawout Position

Making the secondary circuit power, the motor-driven mechanims can store energy automatically until hearing the click and energy stored ''indicating on the panel. Otherwise press the storage handle for 6 times until hearing the click and the indicator display energy stored'' And the closing operation can be realized either by closing electromagnet or manuel button.

Both main circuit and 1. control circuit are connected.

Normal application 2. conditions

The main circuit is 1. disconnected and the control circuit is connected.

Test application 2. conditions.

Neither the main circuit nor the control circuit is connected.

Main body is out of the drawer seat.

In (A) 1600 2000 2000 2500 3200 4000

BusbarThickness(mm) 10 10 8 10 10 10

Width (mm) 80 80 100 100 100 100Number 2 2 2 2 4 4



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3 vertical installed circuit breaker with lever interlock. If two breakers interlock, it only needs remove the above breaker.

50

40

160

50

40

153

163

166

Base

Base Of Circuit Breaker

900

900

45

100

52 60

52 60

65

160

2m max

R≥120 mm

Horizontal Interlock

Vertical Interlock

Mechanical Interlocking between 2 or 3 Air Circuit Breakers



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378

352

400

258

2113211

1111

290

402

112

a55

150

318

292

340

11

258

13

50 150

290

112

55a

335

402

Dimensions

SFA 2000 (1600 A, 2000 A)

SFA 3200 (2500 A , 3200 A)

In A a mm

1600 15

2000 20


42

205

487

533

175 97

9230

112

510

550352

258

425

432

37

307

70

4xM12

400

150362

8xMS

311

267

404

2

300

342.2

25

8.5

269

311.

2

340

12

150

Terminal Connection (mm)Terminal Connection (mm) Panel Front Cut out (mm)

140

14050

20

103

33 175

440

14

11

2-11x17

197.5 197.5

Terminal Connection (mm) Panel Front Cut out (mm)

Panel Front Cut Out (mm)

SFA 4000 ( 4000 A )

Connection Terminals

28

95 95

42

6013

17

5086

16115 11532

16

9xM12



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Type No order Rated Current Break. Cap Release pack boxof poles code In (A) Icu (kA) pcs pcs

SFA-2000 3 SFA 1600 640-1600 80 Electronic 1 1SFA-2000 3 SFA 2000 1200-2000 80 Electronic 1 1SFA-3200 3 SFA 2500 1000-2500 80 Electronic 1 1SFA-3200 3 SFA 3200 1280-3200 80 Electronic 1 1SFA-4000 3 SFA 4000 1600-4000 80 Electronic 1 1

Type No order Rated Current Break. Cap Release pack boxof poles code In (A) Icu (kA) pcs pcs

SFA-2000 3 SDA 1600 640-1600 80 Electronic 1 1SFA-2000 3 SDA 2000 1200-2000 80 Electronic 1 1SFA-3200 3 SDA 2500 1000-2500 80 Electronic 1 1SFA-3200 3 SDA 3200 1280-3200 80 Electronic 1 1SFA-4000 3 SDA 4000 1600-4000 80 Electronic 1 1

TypeCode

OrderCode Description Spec. Pack

pcsBox pcs

SADG SADG Undervoltage Coil 220 V AC 1 1SAAB SAAB Shunt Trip Coil 220 V AC 1 1SAKB SAKB Closing Coil 220 V AC 1 1SAMM SAMM Motor Operator 220 V AC 1 1SAYK SAYK Aux. Contact 2NO+NC 1 1SAMK SAMK Mechanical Interlock 1 1

OrderingFixed Type ACB's

Drawable Type ACB's

Accessories

air circuit breakers - gistargistar.ru/pdf/acb.pdf · 33 introduction sfa and sda series air...

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