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Thermal Overload Operation MCCB
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Product: Views:334Thermal Overload Operation MCCB 
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Last updated: 2018-06-24 03:40
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DAM1 series thermal overload operation Moulded case circuit breaker(Fixed type)

This product patent protected

1P,2P,3P,4P 400V/415V Moulded case circuit breaker high quality with ASTA,KEMA,SEMKO,CE,CB,ROHS certificate

Introduction

The DAM1 series circuit breakers are intended for conducting current in normal mode and switching it off at short circuits, overload, inadmissible bucking as well as operational actuation and tripping of electric circuit parts. They are designed for use in electric units having the operative voltage limited to 400V per rated current from 12,5 to 1600A. 

They correspond to the requirements of EN 60947-1, EN 60947-2 

Thermal-Magnetic Circuit Breakers:

Thermal protection function:(For protection under over load conditions) 

Bimetal,  which provides thermal protection, consists of combination of two metals with different extension coefficients under heat. When bimetal is heated, it bends towards the metal with less extension. In this way, a notch that assists opening of the breaker mechanism is released to disable the breaker. Bending speed of bimetal is in direct proportion with size of the current passing through the breaker. Because, increase of current means increase of heat. In this way, over current protection function of the breaker is fulfilled by bimetal at load currents higher than the rated current

Magnetic protection function (For protection under short circuit conditions)

Another function of the breaker is to protect the connected circuit against short circuits. Short circuit may occur as a result of contact of phases with each other or contact of phase-ground. Since a very high current shall pass through the cables in case of short circuit, system energy should be broken in a shorter time due to thermal protection. Breaker should perform instant opening to protect load it is connected to. The part fulfilling this function is a mechanical opening mechanism that operates with magnetization caused by the magneticarea formed by the short circuit current

Advantages

.Easy independent installation of auxiliary devices:

.Alarm contact;

.Auxiliary contact;

.Under voltage release;

.Shunt release;

.Handle operating mechanism;

.Electrical operating mechanism;

.Plug-in device;

.Draw-out device;.

.Standard set of each circuit breaker consists of connecting busbars or cable lugs, phase separators, a set of screws and nuts for its mounting onto an installation panel.

.With the help of special clamp 125 and 160 units can be installed onto a DIN-rail.

.Weight and dimensions of these circuit breakers are by 10-20% less than that suggested by other home manufacturers. This fact provides for mounting smaller boxes and panels. Besides, small dimensions make it possible to change old circuit breakers to DAM1.

Application

Moulded case circuit breakers are low-voltage circuit breakers. They meet the installation needs of small users all the way to large industrial substations and power distribution systems. They are commonly applied in steel mills, oil platforms, hospitals, railway systems, airports, computing centers, office buildings, convention centers, theaters, skyscrapers, and other large scale structures.

Electrical parameters of DAM1 MCCB molded case circuit breaker

Thermal-magnetic fixed type MCCB

Photo

Model

code

  Icu (KA)

Ics (KA)

Rated Current
-In

Ui(V)

Ue(V)

Pole

Uimp(V)

DAM1-160

B

25

18.75

10 - 12,5 - 16 - 20 - 25 - 32 - 40 - 50 - 63- 80 - 100 - 125-160A

500V

230V

1P

10000

N

36

27

DAM1-200

B

25

18.75

10 - 12,5 - 16 - 20 - 25 - 32 - 40 - 50 - 63- 80 - 100 - 125-160(200)A

750V

400V

2P

10000

N

36

27

DAM1-125

B

25

12.5

10 - 12,5 - 16 - 20 - 25 - 32(30) - 40 - 50 - 63(60) - 80 - 100 - 125A

750V

400V

3P / 4P

10000

N

35

17.5

S

50

37.5

DAM1-160

B

25

12.5

10- 12,5-16-20 - 25 - 32 - 40  - 50 - 63 - 80 - 100 -125 - 160(150)A

750V

400/415V

3P / 4P

8000

N

35

26.25

S

50

37.5

DAM1-250

N

35

26.25

63 - 80-100-125 - 160(180) -  200(225) - 250(320)A

750V

400/415V

3P /4P

8000

S

50

37.5

H

65

48.75

G

85

51

DAM1-630(400)

N

35

26.25

250 - 315 (350)- 400 - 500  - 630A

750V

400/415V

3P /4P

8000

S

50

37.5

H

70

52.5

G

85

52.5

DAM1-800

N

35

35

400 - 500 - 630 (700)- 800 -1000A

750V

400/415V

3P /4P

8000

S

50

37.5

H

70

52.5

G

85

52.5

DAM1-1600

S

65

50

800 -1000 - 1250 - 1600A

750V

400V

3P / 4P

8000

H

85

50

G

100

50

Icu:O-t-CO test(O:Open maneuver,CO:Close-Open maneuver,t:Waiting duration)

Ics:O-t-CO-t-CO test(O:open maneuver,CO:Close-Open maneuver,t:Waiting duration)

ON/I Position: It indicates that contacts of the breaker are closed. In this position, the breaker lever is in the top position

TRIP Position: It indicates that the breaker is opened due to any failure (over load or short circuit). In this case, breaker lever is in the middle position between ON and OFF positions. In order to take the breaker, which is in trip position, to ON position; push the breaker lever downwards as shown by the OFF signBreaker shall be set with "click" sound.After that, pull the lever as shown by ON sign to close the breaker 

OFF/0 Position: It indicates that contacts of the breaker are open. In this way, the breaker lever is in the bottom position.

Physical parameters of DAM1-125 MCCB molded case circuit breaker

Category (EN 60947-2/IEC 60947-2)

Endurance

Model

Pole

Dielectric Propery (V)


lonizationdistance           (mm)

Total Cycles

Electrical Life

Mechanical Life

Main circuit

Auxiliary circuit

DAM1-160

1P

2500

≤30/0

20000

3000

17000

A/0

AC-15

DAM1-200

2P

2500

≤30/0

15000

2500

12500

A/0

AC-15

DAM1-125

3P / 4P

2500

≤30/0

8000

1000

7000

A/0

AC-15

DAM1-160

3P / 4P

3000

≤30/0

8000

1000

7000

A/0

AC-15

DAM1-250

3P /4P

3000

≤30/0※

8000

1000

7000

A/B

AC-15

DAM1-630(400)

3P /4P

3000

≤60/0※

5000

1000

4000

A/B

AC-15

DAM1-800

3P /4P

3000

≤80/0※

5000

1000

4000

A/B

AC-15

DAM1-1600

3P / 4P

3000

≤80/0※

3000

500

2500

A/B

AC-15

Size of MCCB molded case circuit breaker

Model

Pole

Outline dimension
(LXWXH)

DAM1-160

1P

120x30x70mm

DAM1-200

2P

120x60x70mm

DAM1-125

3P

120x76x70mm

 4P

120x101x70mm

DAM1-160

3P

120x90x70mm

 4P

120x120x70mm

DAM1-250

3P

170x105x103.5mm

 4P

170x140x103.5mm

DAM1-630(400)

3P

254x140x103.5mm

 4P

254x184x103.5mm

DAM1-800

3P

268x210x103.5mm

 4P

268x280x103.5mm

DAM1-1600

3P

410x210x138.5mm

 4P

410x280x138.5mm

Working principle

The main contact of the molded case circuit breaker is manual manipulation or electric closing. After the main contact is closed, the free release mechanism locks the main contact into the closing position. The over current trip coil and the thermal trip element are connected in series with the main circuit. The under voltage release coil and the power supply are connected in parallel.

Configuration

Connecting busbars Phase separators Set of screws for panel mounting Set for connecting external conductors

Auxiliary devices for DAM1 MCCB 

1 - Power circuit breaker 

2 - Mounting panel (base) for plug-in/draw-out) option 

3 - Side panels for draw-out option 

4 – Phase separators 

5 – Connecting busbars 

6 – Plug-in contacts 

7 – Blocking unit

8 – Terminal cover 

9 – Casing cover 

10 – Top cover 

11 - Rotary handle operating mechanism

12 – Electrical operating mechanism

13 - Shunt release/under voltage release

14 – Auxiliary/Alarm contacts


DAM1 have more flexible connection method, which can be connected by cable, extended bus-bar, spreader te

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