Introduction
The DAM1 series circuit breakers are meticulously engineered to conduct current seamlessly in normal operation and to interrupt it in the event of short circuits, overloads, or other unacceptable conditions. They are also adept at operational actuation and tripping of circuit segments. These circuit breakers are specifically designed for electric units with an operative voltage capped at 400V, catering to a rated current range of 12.5 to 1600A.
They comply fully with the stringent requirements of EN 60947-1 and EN 60947-2.
Thermal-Magnetic Circuit Breakers:
Thermal Protection Function: (For protection under overload conditions)
The thermal protection is enabled by a bimetallic component, composed of two metals with distinct expansion rates when heated. Upon heating, the bimetal bends towards the metal with the lesser expansion, triggering a notch that releases the breaker mechanism to disconnect the circuit. The bending rate of the bimetal is directly proportional to the current passing through the breaker, as higher current generates more heat. This mechanism ensures the breaker provides overcurrent protection when load currents exceed the rated threshold.
Magnetic Protection Function:(For protection under short circuit conditions) Another crucial function of the breaker is tosafeguard the connected circuit against shortcircuits. Short circuits can occur due tophase-to-phase contact or phase-to-ground contact.Given the very high current that flows through cables during a short circuit, thesystem must disconnect power swiftly to prevent thermal damage. To ensurethis protection, the breaker must perform an instantdisconnection. This is achieved through amechanical opening mechanism thatoperates via magnetization caused by the magnetic fieldgenerated by the short circuit current.This mechanismensures rapid response,effectively protecting the connected load.
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 |
![Certified 250A MCCB for Safe Electrical Distribution Systems](//www.micstatic.com/athena/img/transparent.png)
![Certified 250A MCCB for Safe Electrical Distribution Systems](//www.micstatic.com/athena/img/transparent.png)
![Certified 250A MCCB for Safe Electrical Distribution Systems](//www.micstatic.com/athena/img/transparent.png)
![Certified 250A MCCB for Safe Electrical Distribution Systems](//www.micstatic.com/athena/img/transparent.png)
![Certified 250A MCCB for Safe Electrical Distribution Systems](//www.micstatic.com/athena/img/transparent.png)
![Certified 250A MCCB for Safe Electrical Distribution Systems](//www.micstatic.com/athena/img/transparent.png)
![Certified 250A MCCB for Safe Electrical Distribution Systems](//www.micstatic.com/athena/img/transparent.png)
![Certified 250A MCCB for Safe Electrical Distribution Systems](//www.micstatic.com/athena/img/transparent.png)
![Certified 250A MCCB for Safe Electrical Distribution Systems](//www.micstatic.com/athena/img/transparent.png)
![Certified 250A MCCB for Safe Electrical Distribution Systems](//www.micstatic.com/athena/img/transparent.png)
![Certified 250A MCCB for Safe Electrical Distribution Systems](//www.micstatic.com/athena/img/transparent.png)