NSW2-1000 Air Circuit Breaker

NSW2 series” anxele”brand Air circuit breaker is applicable for distribution network of AC/DC 50/60Hz,rated voltage of 400V and 690V, and rated current of 200A~ 8000A,to distribute electric energy protection circuit and prevent power equipments from harm of overload, under-voltage, short circuit andsingle-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.







Model and meaning

Structure of circuit breaker


Technical specification

Circuit breaker rated current

Frame size rated current Inm (A) Rated current In A
1000 200、400、630、800、1000、1250
1600 1000、1250、1600
3200 1600、2000、2500、2900、3200
4000 3200、3600、4000
8000 4000、6300、7500、8000

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

Frame size rated current Inm (A) 1000 1600 3200 4000 6300 8000
Rated limit short-circuit breaking
capacity Icu (KA) O-CO
400V 65 85 100 100 120 150
690V 42 50 65 65 80 85
Rated operating short-circuit breaking
capacity Icu (KA) O-CO
400V 50 50 65 65 80 120
690V 40 40 50 50 70 85
Rated operating short-circuit breaking
capacity Icu (KA) O-CO
400V 50 50 65 65/80(MCR) 85/100(MCR) 85/120(MCR)
690V 40 40 50 50/65(MCR) 65/75(MCR) 75/85(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.

Temperature℃NSW1 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 none-derating among 6300A.

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

Long-delay Short-delay Instantaneous arthingfault
Ir1 Ir2 Accuracy Ir3 Accuracy Accuracy
(0.4-1)In (0.4-15)In ±10% In~50KA(Inm=200A)
±15% Inm=2000~4000A(0.2~0.8)
Inm=6300A(0.2-1.0)In ±10%
Note:when required three-section protection at the same time,setting values can’t intercross.

b.Long time delay overcurrent 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 pver 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.

Shape mounting dimensions

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