01
User Purpose
1
The NS2-80 AC motor starter (hereinafter referred to as starter) is
applicable to circuits with frequency of AC 50Hz or 60Hz, rated operating
voltage of 690V and below, and current range from 20A to 80A, for
infrequent start control of 3-phase AC motor and protection for short
circuit, overload and phase failure. It can also be used for protection of
distribution line and infrequent load transfer, or used as isolator.
Environmental Conditions and Key
Technical Parameters
2
Table 1 Environmental Conditions
No. Model
Frame
size
rated
current
I
nm
A
Rated
current
of
release
I
n
A
Setting
current
range of
release
A
Rated limit short-circuit
breaking capacity I
cu
,Rated
operating short-circuit
breaking capacity I
cs
kA
Flashover
distance
mm
400/415V
1
2
3
4
5
6
NS2-80
50
I
cu
I
cs
Environmental conditions
Ambient temperature (℃)
Hot and humid
atmospheric conditions
-
5℃~+40℃, with average temperature
within 24h not exc35℃.
Relative humidity should not exceed 50% at
+40℃, up to 90% at +20℃.
Pollution class/installation category
Altitude
No influence below 2000m
Class 3/Category
Ⅲ
Table 2 Main Circuit Technical Parameters 1
Setting
current
value of
short
circuit
current
release
I
r
A
690V
I
cu
I
cs
80
25
32
40
50
65
80
20 25
23~32
30~40
37~50
48~65
63~80
~
350
448
560
700
910
1120
50
50
50
50
50
50
17.5
17.5
17.5
17.5
17.5
17.5
4
4
4
4
4
4
2
2
2
2
2
2
