12
Table 9
Optional
tripping curve
grade K
1
2
3
5
10
15
20
25
30
35
40
Tripping delay
（
S
）
tolerance
±10%
Three - phase balanced load, starting from the cold state
Rated value
Ie×1.2
25
50
75
125
250
375
500
625
750
875
1000
×1.5
16
32
48
80
160
240
320
400
480
560
640
×2
9
18
27
45
90
135
180
225
270
315
360
×3
4
8
12
20
40
60
80
100
120
140
160
×4
2.26
4.52
6.78
11.3
22.5
33.8
45
56.3
67.5
78.8
90
×5
1.44
2.88
4.32
7.2
14.4
21.6
28.8
36
43.2
50.4
57.6
×6
1
2
3
5
10
15
20
25
30
35
40
×7.2
0.7
1.4
2.1
3.5
6.9
10.4
13.9
17.4
20.8
24.3
27.8
0
100
200
300
400
500
600
700
800
900
1000
Ie × 1.2 × 1.5
× 2
× 3
× 4
× 5
× 6
× 7.2
× 8
Fig. 10 Characteristic curve of overload (K curve)
Inverse time overload protection improves manual and automatic reset options.When "automatic"
is selected, after the overload trip of the motor, the heat capacity will be automatically reset to less
than 15%, and the restart operation can be allowed without the need for further reset
operation;When "manual" is selected, after the motor overload trip, the heat capacity will be
reduced to less than 15%. Manual manual reset is required, otherwise the restart operation is not
allowed.
