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S3 PROTECTION
6–38
Table 6-1: Standard overload curve trip times (in seconds)
MOTOR
STANDARD CURVE MULTIPLIERS
CURRE
× 1
× 2
× 3
× 4
NT
(× FLA)
1.01
435
870
130
174
3.6
7.2
61
14
1.05
853.
170
256
341
71
7.4
1.1
4.9
1.10
416.
833.
125
166
68
36
0.0
6.7
1.20
198.
397.
596.
795.
86
72
58
44
1.30
126.
253.
380.
507.
80
61
41
22
1.40
91.1
182.
273.
364.
4
27
41
55
1.50
69.9
139.
209.
279.
9
98
97
96
1.75
42.4
84.8
127.
169.
1
3
24
66
2.00
29.1
58.3
87.4
116.
6
2
7
63
2.25
21.5
43.0
64.5
86.1
3
6
9
2
2.50
16.6
33.3
49.9
66.6
6
2
8
4
2.75
13.3
26.6
39.9
53.3
3
5
8
1
3.00
10.9
21.8
32.8
43.7
3
6
0
3
3.25
9.15 18.2
27.4
36.5
9
4
8
3.50
7.77 15.5
23.3
31.0
5
2
9
3.75
6.69 13.3
20.0
26.7
9
8
8
4.00
5.83 11.6
17.4
23.3
6
9
2
4.25
5.12 10.2
15.3
20.5
5
7
0
4.50
4.54 9.08 13.6
18.1
3
7
4.75
4.06 8.11 12.1
16.2
7
2
5.00
3.64 7.29 10.9
14.5
3
7
5.50
2.99 5.98 8.97 11.9
6
6.00
2.50 5.00 7.49 9.99 12.4
6.50
2.12 4.24 6.36 8.48 10.6
7.00
1.82 3.64 5.46 7.29 9.11 10.9
7.50
1.58 3.16 4.75 6.33 7.91 9.49 11.0
8.00
1.39 2.78 4.16 5.55 6.94 8.33 9.71 11.1
× 5
× 6
× 7
× 8
× 9
217
261
304
348
391
68
22
75
29
83
426
512
597
682
768
8.6
2.3
6.0
9.7
3.4
208
250
291
333
375
3.4
0.1
6.8
3.5
0.1
994.
119
139
159
178
30
3.2
2.0
0.9
9.7
634.
760.
887.
101
114
02
82
63
4.4
1.2
455.
546.
637.
729.
820.
68
82
96
09
23
349.
419.
489.
559.
629.
95
94
93
92
91
212.
254.
296.
339.
381.
07
49
90
32
73
145.
174.
204.
233.
262.
79
95
11
26
42
107.
129.
150.
172.
193.
65
18
72
25
78
83.3
99.9
116.
133.
149.
0
6
62
28
94
66.6
79.9
93.2
106.
119.
4
6
9
62
95
54.6
65.5
76.5
87.4
98.3
6
9
2
6
9
45.7
54.8
64.0
73.1
82.3
3
7
2
6
1
38.8
46.6
54.4
62.1
69.9
7
4
1
9
6
33.4
40.1
46.8
53.5
60.2
7
7
6
6
5
29.1
34.9
40.8
46.6
52.4
5
8
1
4
7
25.6
30.7
35.8
41.0
46.1
2
5
7
0
2
22.7
27.2
31.8
36.3
40.8
1
5
0
4
8
20.2
24.3
28.3
32.4
36.5
8
3
9
4
0
18.2
21.8
25.5
29.1
32.7
2
6
0
5
9
14.9
17.9
20.9
23.9
26.9
5
4
3
1
0
14.9
17.4
19.9
22.4
9
9
9
9
8
12.7
14.8
16.9
19.0
0
2
4
6
8
12.7
14.5
16.3
3
5
7
9
12.6
14.2
8
6
4
12.4
0
9
339 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 6: SETPOINTS
× 10 × 11 × 12 × 13 × 14 × 15
435
478
522
565
609
36
90
43
97
51
853
939
102
110
119
7.1
0.8
45
98
52
416
458
500
541
583
6.8
3.5
0.2
6.9
3.6
198
218
238
258
278
8.6
7.5
6.3
5.2
4.1
126
139
152
164
177
8.0
4.8
1.6
8.5
5.3
911.
100
109
118
127
37
2.5
3.6
4.8
5.9
699.
769.
839.
909.
979.
90
89
88
87
86
424.
466.
508.
551.
593.
15
56
98
39
81
291.
320.
349.
379.
408.
58
74
90
05
21
215.
236.
258.
279.
301.
31
84
37
90
43
166.
183.
199.
216.
233.
60
26
92
58
24
133.
146.
159.
173.
186.
27
60
93
25
58
109.
120.
131.
142.
153.
32
25
19
12
05
91.4
100.
109.
118.
128.
6
60
75
89
04
77.7
85.5
93.2
101.
108.
3
1
8
05
83
66.9
73.6
80.3
87.0
93.7
5
4
4
3
3
58.3
64.1
69.9
75.7
81.6
0
3
6
9
2
51.2
56.3
61.5
66.6
71.7
5
7
0
2
5
45.4
49.9
54.5
59.0
63.5
2
7
1
5
9
40.5
44.6
48.6
52.7
56.7
5
1
6
2
7
36.4
40.0
43.7
47.3
51.0
3
8
2
6
1
29.8
32.8
35.8
38.8
41.8
9
8
7
6
5
24.9
27.4
29.9
32.4
34.9
8
8
8
8
7
21.2
23.3
25.4
27.5
29.6
0
2
4
5
7
18.2
20.0
21.8
23.6
25.5
1
4
6
8
0
15.8
17.4
18.9
20.5
22.1
2
1
9
7
5
13.8
15.2
16.6
18.0
19.4
8
7
5
4
3
653
04
128
06
625
0.2
298
2.9
190
2.1
136
7.0
104
9.9
636.
22
437.
37
322.
96
249.
90
199.
91
163.
98
137.
18
116.
60
100.
42
87.4
5
76.8
7
68.1
4
60.8
3
54.6
5
44.8
4
37.4
7
31.7
9
27.3
2
23.7
4
20.8
2
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