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 Products >> LOW VOLTAGE PRODUCTS >> MOULDED CASE BREAKER >> MSM3(ABB-S, MSM1, MSM3)Series Moulded Case Circuit Breakers
MSM3(ABB-S, MSM1, MSM3)Series Moulded Case Circuit Breakers
    Product details

MSM3(ABB-S, MSM1, MSM3)Series Moulded Case Circuit Breakers

 

Product Features

MSM3(ABB-S, HSM1,HM3)Series moulded case circuit breaker, It's applicable circuit of AC 50Hz(or 60Hz),rated insulation voltage 660V, rated operating voltage under AC 660V, 250V(DC), rated operating current 10A-800A,for distribute energy of electricity and infrequent making and breaking circuit. In normal conditions , the MCCB rated current under 400A they are provided with the function of the protection against overload and short circuit and undervoltage. The MCCB complies with standard of IEC947-2, GB14048.2, GB14048.4 and so on.

Type and meanings

 

Note:   No code for distribution breakers; "2" represents motor protection circuitbreakers.
         
  No code for direct handle operation; "P" represents electrical operation,and "Z"  represents- rotary- operated- handles.
        
  Rated breaking capacity grade of MCCB: E-Economical type S-Stan-dard type M-High breaking capacity type              H- Highest breaking capacity type.

Classification of MCCB

Installation type of MCCB: MCCB are suiable for vertical or harizontal installation.
According to use of MCCB: distribution circuit protection type, motor protection type
According to connection way : front panel connection, back panel connection plug-in connection;
According to operation way: for direct handle operation for external rotary handle operating, formotor operating;
According to overload release type: magnetic release (only instantaneous) the modynamic magnetictype (dual), electronical release;
According to number of poles: two poles, there poles, four poles.
The neutral poles (N poles) of four poles MCCB has for types:
Type A: no overload release on N pole, which is making at the time ; not closing and opening withthe other three poles.
Type B: no overload release on N pole, which closing and opening with the other three poles
Type C: with overload release on N pole, which closing and opening with the other three poles.
Type D: with overload release on N pole, which making all time; not closing and opening with theother three poles.
Type E: with a neutral pole interruption protector on N pole that closing or opening with other threepoles.

Main technical Specifications

Type

Rated
Cureent(A)

Pole No.

Rated
opreating voltage (V)

Ultimate short circuit breaking capacity(KA)

Short circuit breaking capacity(KA)

Operation
performance
(endurance)

Operation
performance

AC380V
(400)

AC660V
(690)

DC250

AC380V
(400)

Load

Unload

L

W(3P/4P)

H

MSM3-125E

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

2P

3P

4P

?30

15

-

-

7.5

3000

7000

120

76/101

70

MSM3-125S

25

-

20

16

MSM3-160S

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

380V
660V

35

8

20

18

4000

6000

120

90/120

70

MSM3-160H

50

10

40

25

MSM3-250S

100,125,
160,180,200,
225,250

35

10

40

18

2000

6000

170

105/140

103.5

MSM3-250M

50

16

40

30

MSM3-250H

200,225,250
315,350,400

65

18

40

48

1000

4000

254

140/184

103.5

MSM3-400S

35

16

40

18

MSM3-400M

50

20

40

20

MSM3-400H

65

25

40

48

MSM3-630S

400,500,630

50

20

40

30

1000

4000

268

210/280

103.5

MSM3-630M

65

25

40

48

MSM3-600H

80

30

40

60

MSM3-800S

500,630
700,800

50

20

40

30

1000

4000

268

210/280

103.5

MSM3-800M

65

25

40

48

MSM3-800H

80

30

40

60

 

Motion characteristic

The thermodynamic release of a circuit breaker provides the feature of inverse time-delay, while the magnetic release is the instantaneous operation as shown on table 2(distribution circuit breaker) and table 3 (motor protection circuit breakers).

Table2

Rated current of release(A)

Thermodynamic Release
(ambient templand +40 ? marine +45?)

Operational current of
magnetic release(A)

1.05In(cold state)
inoperative time(h)

1.30In(heat state)
operative time(h)

In= 63

=1

< 1

10-50In20%

63<In= 250

=2

< 2

10In20%
5-10In20%

250<In= 800

=2

< 2

Table3

Rated current of release(A)

Thermodynamic Release
(ambient templand +40? marine +45?)

Operational current of
magnetic release(A)

1.0In(cold state)
inoperative time(h)

1.20In(heat state)
operative time(h)

1.50In(heat state)
operative time(h)

7.2In(cold state)
operative time(h)

12.5=In= 400

2

2

= 4min

2s<Tp= 10s

12In20%

 

Rotation handle operated mechanism

The rotation handle operated mechanism used in AM3 series MCCB ,meet the requirements(drawer chambers, distributor panel and power supply boxes )of set swithgear It can ensures the safety of equipment when the MCCB aare close .i.e it with panel door with handle in ON position ,may turn the Red release button in Rotation handle pedestal side



Shown in above fig. Hinge of panel door to handle centre R and breaker cover to cabinet panel H isminimum distances.

Motor operators

Motor operator are used to make or break the MCCB automatically in thedistance

Lock device

  With padlock front panel type is used by MCCB of fumish operating mecha-nism. (Applicable MCCB type: AM3-250~AM3-800) (MCCB) is "OFF" posi-tion when the locked device operated may avoid making of MCCB. It's rationthree unit padlock of diameter 6mm (user provide for oneself ). It's selectionunder following
  One "OFF" position lockTwo or more than two, "OFF" position lock of MCCB (MCCB group use thesame kind key).

Name of accessories

without accessories

alarm contact

shunt release

sht and alt

auxilary contact

aux and alt

undervoltage release

instantaneous release(Mag)

200

208

210

218

220

228

230

thermo-mag release

300

308

310

318

320

328

330

 

Name of accessories

UVT and alt

sht and aux

sht aux and alt

two auxilary contact

aux and one aux

aux and one alt

unx and one aux and alt

instantaneous release(Mag)

238

240

248

260

268

270

278

thermo-mag release

338

340

348

360

368

370

378


*  Alt i.e. Alarm contact Sht i.e.Shunt release UVT i.e. Undervoltage release AUX i.e. Auxilarycontact
*   Two auxiliary contact and alarm contact only supply by inm 630A and 800A

Working environment

The MCCB can be reliably operate, d under the following conditio, ns
1. The altitude not exceeding 2000m;
2. The ambient temperature is from +40oC to -5oC;
3. Ambient envirohment freeing from explosive danger and air or dustwhich may cause corrosion of metal or weakness of insulation;
4. Ambient environment freeing from erosion of rain or snow;
5. Pollution degree 3;6. Installation category III.

Outline and installation dimensions


Front panel connection
Back panel connection



Plug-in connection front panel connection
Plug-in connection front panel connection



Plug-in connection back panel connection

 


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