Cookie Img
Back to top
Home » Products » Fuses&Breakers » Air Circuit Breaker

Air Circuit Breaker

Air Circuit Breaker
Air Circuit Breaker
Send Inquiry
Product Code : GTW1
Product Description

GTW1 Series Air Circuit Breaker is applicable for distribution network of AC 50Hz,rated voltage of 400V and 690V, and rated current of 630Aï½Å¾ 6300A,to distribute electric energy protection circuit and prevent power equipment from harm of overload, under-voltage, short circuit and single-phase earth etc. Provided with intelligent protecting function and precise selective protective, breaker can enhance the dependability of power supply and avoid unwanted power cut.

Circuit breaker rated current

Frame size rated current Inm (A)

Rated current In A

2000

400A 630A 800A 1000A 1250A 1600A  2000A

3200

2000 A 2500A 2900A 3200A

4000

3200A 3600A 4000A

6300

4000A 5000A 6300A


Circuit breaker rated short-circuit breaking capacity and rated short-time withstand current, Arcing- over distance is zero.

Frame size rated current Inm (A)

2000

3200

4000

6300

Rated limit short-circuit breaking
capacity Icu (KA) O-CO

400V

85

100

100

120

690V

50

65

65

80

Rated short-circuit connecting capacity
N×Icu (KA)/ cosФ

400V

176/0.2

220/0.2

220/0.2

264/0.2

690V

105/0.25

143/0.2

143/0.2

187/0.2

Rated operating short-circuit breaking
capacity Icu (KA) O-CO

400V

50

65

65

80

690V

40

50

50

70

Rated operating short-circuit breaking
capacity Icu (KA) O-CO

400V

50

65

65/80(MCR)

85/100(MCR)

690V

40

50

50/65(MCR)

65/75(MCR)

Note: last hour line and next enter line of breaking capacity in the table are the same.


Earthing fault

Largest loss-power of the breaker is 360W. Breaker’s rated continuous current changes under different conditions.

TemperaturežÆ’\GTW1

400A

630A

800A

1000A

1250A

1600A

2000A

40

400A

630A

800A

1000A

1250A

1600A

2000A

50

400A

630A

800A

1000A

1250A

1550A

1900A

60

400A

630A

800A

1000A

1250A

1550A

1800A

Note: 2500A or above derating factor is 0.9, including 4000A non-derating among 6300A.


Intelligent over-current controller protection characteristic and function
Over-current controller protection feature
a.Controllers setting value Ir (I/ In) and accuracy

Long-delay

Short-delay

Instantaneous

Arthing fault

Ir1

Ir2

Accuracy

 

Ir3

Accuracy

Accuracy

(0.4-1)In

(0.4-15)In

±10%

In~50KA(Inm=200A)
In~75KA(Inm=3200~4000A)
In~100KA(Inm=6300A)

±15%

Inm=2000~4000A(0.2~0.8)
InMax.1200AMin.160A

Inm=6300A(0.2-1.0)In

±10%

Note:when required three-section protection at the same time,setting values can’t inter cross.

b.Long time delay over current protection characteristics I2TL=(1.5Ir1) 2 tL Operative time of (1.05~2.0)Ir1 view table below, time accuracy
is ±15%.
Note: tL- long time delay setting for 1.5 Irs, TL- long time delay operative time
c.Short time delay over-current protection characteristic
d.Short time delay over-current protection is with fixed time setting. When inverse time limit is required to be low multiples, its characteristic
should according to I2Ts=(8Ir1) 2 ts, ts is for common delay time setting; when over load current >8 Ir1 , automatically changes to fixed
time setting characteristic, its characteristic view table below, time accuracy is ±15%.

Delay time(s)

Returnable time(s)

0.1

0.2

0.3

0.4

0.06

0.14

0.23

0.35

d.over-current protection characteristic view graph1,earthing fault protection characteristic view graph2.


X