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Application of S MCCB 
S series Molded case circuit breaker(hereinafter referred to as MCCB) is the new series MCCB, which is developed strictly according to international standards and manufactured with advanced technology by HOREL Electric Technology CO.,LTD.
This product complies with IEC60947-2.The MCCB, having rated insulation voltage 500V(lnm ≤ 160A) to (lnm ≥ 250A) is designed to be used for distribution network of having rated current 10A to 1600A, rated operational voltage 380/400V to 660/690, intended for power distribution, protection of electrical equipments and circuits against overload, short-circuit and under voltage, and also for unfrequent switching of electric circuits in most cases. MCCB with frame rating up to and including 400A can be used for unfrequent starting, and interruption of squirrel cage motors, and
for protection of motors against overload, short-circuit and under voltage.
SM8 series circuit breakers can be equipped with electric accessories and mechanical accessories, such as under voltage release, shunt release,auxiliary contacts, alarm contact, electric operating mechanism and rotary mechanical operating handle etc.
SM8 series intelligent molded case circuit breakers are equipped with electronic release with the function of protection of electric circuits and equipments not only against overload, short-circuit and under voltage, but also against earthing failure. The intelligent functions of it are:current failure; output of over-current signal and monitoring of circuit breaker open/close, particularly, the intelligent trip unit is designed with interface available for remote measuring, remote adjusting, remote controlling and remote communicating between circuit breakers and computers.

Working conditions of S MCCB 
1. Not over altitude 2000m;
2. Ambient temperature is between-25°C and +40°C ; Working in the medium which not any explosive, not enough dielectric to corrode metal, no gas to damage insulation and electric conduction dust;
3. Working in the place would not be invaded by rain and snow; 3. Pollution degree3; 4. Mounting type.

Classification of S MCCB

1) According to using: distribution circuit protection type, motor production type;
2) According to connection mode: front panel connection, back panel connection, plug-in connection;
3) According to operating way: for direct handle operating, for motor operator operating, for rotary handle operating.
4) According to the number of pole: 3,4 pole.
5) According to the accessory: with accessory setting, and without accessory setting.

Technical features of S MCCB
Complete range of current ratings which enable users to solve all protection requirements of installation:
with high short-circuit breaking capacity
B-Basic type: general breaking capacity
N-Ordinary type: ordinary breaking capacity
S-Standard type: standard breaking capacity
H-Higher breaking type: higher breaking capacity

 

The Main Capability Index of S MCCB

Rated current of release(A)

Thermodynamic release(ambient temp+40 )

Operation current of magnetic release(A)

1.05ln(cold state)
inoperative time(h)

1.30ln(heat state)
inoperative time(h)

ln 63

1

1

10-50ln 20%

63 ln 250

2

2

10ln 20%

250 ln 800

2

2

5-10ln 20%


Rated current of release(A)

Thermodynamic release(ambient temp+40 )

Operation current of magnetic release(A)

1.0ln(cold state)
inoperative time(h)

1.20ln(heat state)
inoperative time(h)

1.50ln(heat state)
inoperative time(h)

1.0ln(heat state)
inoperative time(h)

12.5 ln 400

2

2

4min

2S Tp 10S

12ln 20%

S MCCB SPECS

 

 
Type

Rated current (A)

Pole

Rated insulating voltage (V)

Rated operating voltage (V)

Arcing over distance (mm)

Ultimate short circuit breaking capacity (KA)

Service short circuit breaking capacity (KA)

Operation performance (Endurance)

Overall dimensions

AC380V (400)

AC660V (690)

DC250

AC380V (400)

AC660V (690)

Load

Unload

L

W (3P/4P)

H

S-125S

12.5,16,20,25
32,40,50,63
80,100,125

2,
3,
4,

660

380
660

>30

15

-

-

7.5

-

3000

7000

120

76/101

70

S-125S

25

-

20

16

-

S-160S

16,20,32,40
50,63,80,100
125,160

0

35

8

20

18

-

4000

6000

120

90/120

70

S-160H

50

10

40

25

-

S-250S

100,125,160
180,200,225
250

35

10

40

18

-

2000

6000

170

105/140

103.5

S-250M

50

16

40

30

-

S-250H

65

18

40

48

-

S-400S

200,225,250
315,350,400

35

16

40

18

-

1000

4000

254

140/184

103.5

S-400M

50

20

40

30

-

S-400H

65

25

40

48

-

S-630S

400,500,630

50

20

40

30

-

1000

4000

268

210/280

103.5

S-630M

65

25

40

48

-

S-630H

80

30

40

60

-

S-800S

500,630
700,800

50

20

40

30

 

1000

4000

268

210/280

103.5

S-800M

65

25

40

48

 

S-800H

80

30

40

60

 

 

 

Specifications
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ADD : No119 Xinguang Road Industry Liushi Town Yueqing City
Zhejiang Province China
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E-mail : alan@chinahorel.com

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