Introduction
The DAM1 series circuit breakers are engineered to conduct current seamlessly in normal conditions and to swiftly switch off during short circuits, overloads, or inadmissible bucking. They also offer operational actuation and tripping of electric circuit parts. These circuit breakers are meticulously designed for electric units with an operative voltage limited to 400V, suitable for rated currents ranging from 12.5A to 1600A.
They meet the stringent standards of EN 60947-1 and EN 60947-2, ensuring top-notch reliability and performance.
Thermal-Magnetic Circuit Breakers:
Thermal protection function: (For protection under overload conditions)
The thermal protection feature utilizes a bimetal strip, which is composed of two metals with different expansion rates under heat. When heated, the bimetal bends towards the less expansive metal, releasing a notch that triggers the breaker mechanism, thereby disabling the breaker. The bending speed is directly proportional to the current passing through the breaker, as higher currents generate more heat. This ensures that the breaker provides effective overcurrent protection at load currents higher than the rated current.
Magnetic protection function:(For protection under short circuit conditions) Another vital function of the breaker is tosafeguard the connected circuit against shortcircuits. Short circuits can occur due tocontact between phases or betweena phase and ground. Given the exceedinglyhigh current that flows through the cables during a short circuit, system energymust be interrupted promptly dueto thermal protection. The breaker mustimmediately open to protect the loadit is connected to. This function is fulfilled bya mechanical openingmechanism thatis activated bythe magnetic field generated by the short circuit current.
Thermal-Magnetic fixed type Circuit Breakers |
|
Model |
DAM1-250 |
Breaking Capacity Code |
N |
S |
H |
G |
Rated Current of Frame size- Inm (A) |
250A |
Rated Current-In(40,50 or 55ºC) (A) |
63 - 80-100-125 - 160(180) - 200(225) - 250(320)A |
Rated İnsulation Voltage -Ui(a.c.) 50-60Hz (V) |
750V |
Rated operation Voltage -Ue(a.c.) 50-60Hz (V) |
400/415V |
Number of Pole |
3P /4P |
Rated ultimate short Circuit breaking Capacity kA Icu AC400V/50Hz O-CO (KA) |
35 |
50 |
65 |
85 |
Rated service short Circuit breaking Capacity kA Ics AC400V/50Hz O-CO-CO (KA) |
26.25 |
37.5 |
48.75 |
51 |
Rated short-circuit breaking capacity Icm(peak)/cos ф AC400V/50HZ O-CO (KA) |
77/0.25 |
114/0.25 |
143/0.2 |
178/0.2 |
Rated impulse withstand Voltage -Uimp (V) |
8000 |
Dielectric Propery (V) |
3000 |
lonization distance (mm) |
≤30/0 |
Endurance |
Total Cycles |
8000 |
Electrical Life |
1000 |
Mechanical Life |
7000 |
Over Current trip |
Thermal and Magnetic release fix type |
√ |
Category (EN 60947-2/IEC 60947-2) |
Main circuit |
A/B |
Auxiliary circuit |
AC-15 |
Under Voltage Release |
√ |
Shunt Release |
√ |
Auxiliary Contact |
√ |
Alarm Contact |
√ |
Auxiliary Contact and Alarm Contact |
√ |
Handle Operation Mechanism |
√ |
Electrical Operastion Mechanism |
√ |
DIN clips |
- |
Terminal cover |
|
|
√ |
Phase seperator |
|
|
√ |
Extention Handle |
|
|
- |
|
W (mm) |
3P |
105 |
4P |
140 |
L (mm) |
3P |
170 |
4P |
170 |
H (mm) |
3P |
103.5 |
4P |
103.5 |
Weight |
Fixed version 3P/4P |
2.7/3.5 |
41.5/5.5 |
Plug-in version 3P/4P |
3.2/4.2 |
4.6/6 |
Draw out version 3P/4P |
3.6/4.6 |
5/6.4 |
![250A Moulded Case Circuit Breaker with Asta Certification](//www.micstatic.com/athena/img/transparent.png)
![250A Moulded Case Circuit Breaker with Asta Certification](//www.micstatic.com/athena/img/transparent.png)
![250A Moulded Case Circuit Breaker with Asta Certification](//www.micstatic.com/athena/img/transparent.png)
![250A Moulded Case Circuit Breaker with Asta Certification](//www.micstatic.com/athena/img/transparent.png)
![250A Moulded Case Circuit Breaker with Asta Certification](//www.micstatic.com/athena/img/transparent.png)
![250A Moulded Case Circuit Breaker with Asta Certification](//www.micstatic.com/athena/img/transparent.png)
![250A Moulded Case Circuit Breaker with Asta Certification](//www.micstatic.com/athena/img/transparent.png)
![250A Moulded Case Circuit Breaker with Asta Certification](//www.micstatic.com/athena/img/transparent.png)
![250A Moulded Case Circuit Breaker with Asta Certification](//www.micstatic.com/athena/img/transparent.png)
![250A Moulded Case Circuit Breaker with Asta Certification](//www.micstatic.com/athena/img/transparent.png)
![250A Moulded Case Circuit Breaker with Asta Certification](//www.micstatic.com/athena/img/transparent.png)