DAA series Low Voltage Air circuit breaker air circuit breaker is suitable for the circuit of AC 50Hz/60Hz with rated service voltage 400V, 690V and rated service current up to 6300A.It is mainly used to distribute electric energy and protect circuits and electric equipment against over-load, under-voltage, short-circuit and single-phase earthing fault.
With intelligentized and selective protection functions, the breaker can improve the reliability of power supply, and avoid unnecessary power failure.The breaker is applicable for power stations, factories, mines (for 690V) and modern high- buildings, especially for the distribution system of intelligentized building.
·Advantages provided for design and manufacture of LV assemblies
>> With high short-circuit breaking capacity,Non ionization distance
380/400V80-120kA
660/690V50-85kA
>> Perfect intelligent protective functions.
The electronic trip unit is a microprocessor based techniques with intelligent protective functions.
>> All modular structure
Modular design for whole series,simple maintenance and adjustment free.
>> Double insulation, safe and reliable
Double insulation from the front face of the circuit breakers, operated safely and reliably.
>> Compact design, Light in weight
>> Complete range of accessories.Common for whole series
>> Compliance with International and national standards.
IEC 947-2
GB14048.2
Technical note The model number of those product is DW 45 used in low-voltage electrical Industry.
· Normal operation conditions
>> The ambient air temperatures DA All not be over +40ºCand below-5ºC and its average over a period of 24h hours does not exceed +35ºC.
Altitude
>> The altitude of the site of installation does not exceed 2000m
>> Atmospheric conditions
Its relative humidity does not exceed 50% at a maximum temperature of +40ºC,Higher relative humidity maybe permitted at lower temperature.The mean maximum value of the most humidity month is 90%,and the mean lowest temperature of this month is+25ºC.Care should be taken
of moderate condensation which may occur on the surface of products due to variations in temperature.
· Normal installation conditions
>> The circuit breakers DAA all be installed in accordance with the manufacturer's instrucions.The vertical inclination of the circuit breakers DA All not exceed 5°
· Installation category
| Rated operational voltage |
380/400V |
660/690V |
| Installation category |
| Electric circuit |
| Main circuit |
IV |
IV |
| Coil of under voltage release |
| Pirmary coil power transformer |
| Auxiliary circuit |
III |
III |
| Degree of protection |
Installation method |
Accessories |
| IP30 |
Normal open mounting |
|
| IP40 |
Mounted in a compartment of cubicle with additional door frame |
door frame to be mounted by user |
| IP54 |
Mounted in a compartment of cubicle with additional door frame and transparent cover |
door frame and transparent cove to be mounted by user |
· Pollution degree
| Type |
DAA1-1000 |
DAA1-2000 |
DAA2-3200 |
DAA3-4000 |
DAA4-6300 |
| Frame rated |
1000 |
2000 |
3200 |
4000 |
6300 |
| current Inm (A) |
| Number of poles |
3,4 |
3,4 |
3,4 |
3,4 |
3,4 |
| Rated current In (A) |
200,400,630,800,1000 |
400,630,800,1000,1250,1600,2000 |
2000,2500,3200 |
4000 |
5000,6300 |
|
|
|
|
| Icu (kA)O-CO |
400V |
42 |
80 |
100 |
100 |
120 |
| 690V |
25 |
50 |
65 |
65 |
85 |
| Ics (kA)O-CO-CO |
400V |
30 |
50 |
65 |
65 |
100 |
| 690V |
20 |
40 |
50 |
50 |
80 |
| Icw(kA)O-CO |
400V |
20 |
50 |
65 |
65/80(MCR) |
85/100(MCR) |
| 690V |
20 |
40 |
50 |
50/65(MCR) |
65/75(MCR) |
| Rated current at N-pole In (A) |
50%In, 100%In |
| Inherent making& breaking time |
23-32ms |
|
|
| Operational performance (operations) |
Electric life |
500 |
|
| Mechanical life |
9500 |
| Mounting mode |
Fixed with drawable |
|
| Arcing distance(mm) |
0 |
|
| Intelligent controller |
Standard type(M) Telecommunication type (H) |
|
Audited Supplier 
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