CHINT NA1-2000X User Manual

13.2 Selective protection in NA1
Circuit breaker
Rated
current (A)
Default setting ratings
of short time-delay 8In (kA)
Setting
range (kA)
Delayed tripping
time (s)
Returnable time
Frame size
rated current
Rated
current (A)
630
1000 1250 1600
2000 2000 2500 3200
NA1-2000X
NA1-3200X
NA1-4000X
NA1-6300X
4000 4000 5000 6300
NA1-2000X/NA1-2000XN/NA1-2000XH NA1-3200X/NA1-3200XN
NA1-4000X
NA1-6300X/NA1-6300XN
5.04
0.63～9.45
8
1~15
10 16 16
20 25.6 32 32
1.25~18.75
2~30 2~30 2.5~37.7 3.2~48 4~60 4~60
40 50.4
5~75
6.3~94.5
Default instantaneous
setting ratings 12In (kA)
400
630
800
1000
1250
1600
2000
2000
2500
3200
3200
4000
4000
5000
6300
4.8
7.56
9.6
12
15
19.2
24
24
30
38.4
38.4
48
48
60
75
6.348~9.45
800
6.4
0.8~12
6.348~12
9.998~12
6.348~15
9.998~15
12.696~15
6.348~18.75
9.998~18.75
12.696~18.75
15.87~18.75
6.348~24
9.998~24
12.696~24
15.87~24
19.837~24
6.348~30
9.998~30
12.696~30
15.87~30
19.837~30
25.392~30
6.348~30
9.998~30
12.696~30
15.87~30
19.837~30
25.392~30
6.348~37.7
9.998~37.7
12.696~37.7
15.87~37.7
19.837~37.7
25.392~37.7
31.74~37.7
31.74~37.7
6.348~48
9.998~48
12.696~48
15.87~48
19.837~48
25.392~48
31.74~48
31.74~48
39.675~48
6.348~60
9.998~60
12.696~60
15.87~60
19.837~60
25.392~60
31.74~60
31.74~60
39.675~60
50.784~60
50.784~60
6.348~60
9.998~60
12.696~60
15.87~60
19.837~60
25.392~60
31.74~60
31.74~60
39.675~60
50.784~60
50.784~60
6.348~75
9.998~75
12.696~75
15.87~75
19.837~75
25.392~75
31.74~75
31.74~75
39.675~75
50.784~75
50.784~75
63.48~75
63.48~75
6.348~94.5
9.998~94.5
12.696~94.5
15.87~94.5
19.837~94.5
25.392~94.5
31.74~94.5
31.74~94.5
39.675~94.5
50.784~94.5
50.784~94.5
63.48~94.5
63.48~94.5
79.35~94.5
Note: It can satisfy the selective protection if only the short time-delay setting value of the superior breaker 1.32 times more than the
subordinate breaker, when the instantaneous setting value is adjustive.
Downstream
Upstream
0.1, 0.2, 0.3, 0.4 0.1, 0.2, 0.3, 0.4
0.06, 0.14, 0.23, 0.35 0.06, 0.14, 0.23, 0.35
12.8
1.6~24
C
NA1
Air Circuit Breaker
P-078
P-077
NA1
Air Circuit Breaker

CHINT NA1-2000X Specifications

General

Brand	CHINT
Model	NA1-2000X
Category	Circuit breakers
Language	English