014
5 basic frame sizes
Summary
For your various requirements, the Air Circuit Breaker NA1
includes 5 basic frame sizes as followed.
1. General
2. Operating conditions
C
NA1
Air Circuit Breaker
P-040
P-039
NA1
Air Circuit Breaker
1.1 Application scope
NA1 series 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.
1.2 Standard: IEC/EN 60947-2.
2.1 Temperature condition:
-5℃~40℃; the average value within 24h shall not exceed
+35℃ (special situation excluded);
2.2 Altitude:≤2000m;
2.3 Pollution grade: Grade 3;
2.4 Air conditions:
At mounting site, relative humidity not exceed 50% at the
max temperature of +40℃, higher relative humidity is
allowable under lower temperature, RH could be 90% at
+20℃, special measures should be taken to occurrence of
dews;
2.5 Note: Without the intelligent controller, the breaker
functions as a switch-disconnector.
No. of poles:
3:3-pole
4:4-pole
Rated current:
Mode of installation:
F:Fixed type
D:Draweout type
Mode of operation:
M:Manual
P: Power-driven
2.6 Type designation
NA1 - □□-□□ / □-□-□-□-□
Voltage of secondary circuit
AC220V, AC380V,
AC230V, AC400V
DC220V, DC110V
Wiring of main circuit:
H:Horizontal wiring of main circuit
V:Vertical wiring of main circuit
Intelligent controller:
M: Standard type
3M: Multifunctional type
3H: Communication type
Frame size
rated current
Rated current
630A
800A
1000A
1250A
1600A
2000A
2000A
2000A
2500A
3200A
4000A
3200A
4000A
5000A
6300A
6300A
200A
400A
630A
800A
1000A
1000A
Frame size rated current:
1000,2000,3200,4000,6300
Design sequence number
ACB
Company code
4000A
Breaking capacity:
X
XN
XH
NA1-2000X,NA1-2000XN，NA1-2000XH
630A to 2000A
NA1-3200X,NA1-3200XN,NA1-4000X
2000A to 4000A
NA1-6300X,NA1-6300XN
4000A to 6300A
NA1-1000X
200A to 1000A
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