DAA Air circuit breaker
DAA Air circuit breaker
DAA Air circuit breaker
DAA Air circuit breaker
DAA Air circuit breaker
DAA Air circuit breaker
DAA Air circuit breaker
DAA Air circuit breaker

DAA Air circuit breaker

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.
  • Product Description
  • Specifications
  • Product Features
  • More Details

Product Description

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.

Specifications

· 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)

● Protection characteristics and functions of intelligent overcurrent controller

Protection characteristics of overcurrent controller
1. The setting value Ir (I/In) and error of the controller

Long delay short delay Instantaneous Ground Fault
Ir1 Ir2 error Ir3 error Ir4 error
(0.4-1)In (0.4-15)In ±10% In~50kA(Inm=2000A)
In~75kA(Inm=3200~4000A)
In~100kA(Inm=6300A)
±15% Inm=2000~4000A
(0.2~0.8)In
Max 1200A, Min 160A
Inm=6300A
(0.2-1.0)In
±10%

Note: When there is (required) three-stage protection at the same time, the setting values cannot be crossed.

2. Long-delay overcurrent protection inverse-time operation characteristics I²TL=(1.5lr1)²tL, and the operation time of (1.05~2.0)lr1 is shown in Table 4, and the time error is ±15%.
Note: tL-Long delay 1.5lrs setting time, TL-Long delay operation time.
Note: When there is (required) three-stage protection at the same time, the setting values cannot be crossed.

1.05Ir1 1.3Ir1 1.5Ir1 setting time (s) 15 30 60 120 240 480
>2h non-operation <1h opetation 2.0Ir1 opetation time (s) 8.4 16.9 33.7 67.5 135 270

3. Short delay over-current protection characteristics
Short-time delay over-current protection is definite time limit. If the low multiple is required to be inverse time, the characteristic is: I²Ts=(8Ir1)²ts, ts is the general delay design time;
When the overload current >8Ir, it automatically converts to the definite time characteristic. Its definite time limit characteristic is shown in Table 5. The time limit error is ±15°C.

 

Product Features

· Normal operation conditions

 

>> The ambient air temperatures DA All not be over +40℃and below-5℃ and its average over a period of 24h hours does not exceed +35℃.

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 +40℃,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+25℃.Care should be taken

of moderate condensation which may occur on the surface of products due to variations in temperature.

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