product

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 Detail

FAQ

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·Introduction

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

 

 

·Types and meanings

DAA  -1/2 

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 +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.

 

· 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)

 

 

 


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