4–34
239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL
CHAPTER 4: PROGRAMMING
•
AUTO RESET O/L TRIPS:
When enabled, this feature will automatically reset overload
trips once the thermal capacity (TC) decreases to 15% or less. All other types of trips
are not affected by this feature.
FIGURE 4–6: Phase Timed Overload Curves
0
1
10
100
1000
10000
100000
0.1
1.0
10.0
100.0
CURRENT (I/Ipu)
TRIP TIME
(seconds)
MULTIPLIER
1
2
3
4
7
9
12
15
Table 4–2: 239 Phase Overload Trip Times (Seconds)
CURVE
NUMBER
MULTIPLE OF MOTOR FULL LOAD CURRENT
1.03
1.05
1.1
1.5
2
2.5
3
4
5
6
8
10
11
1
1437
854
416.7
70.0
29.2
16.7
10.9
5.8
3.64
2.50
1.39
0.88
0.73
2
2874
1707
833.4
140.0
58.3
33.3
21.9
11.7
7.29
5.00
2.78
1.77
1.46
3
4311
2561
1250.0
210.0
87.5
50.0
32.8
17.5
10.93
7.49
4.16
2.65
2.19
4
5748
3415
1666.7
280.0
116.6
66.6
43.7
23.3
14.57
9.99
5.55
3.53
2.91
5
7184
4269
2083.4
349.9
145.8
83.3
54.7
29.1
18.22
12.49
6.94
4.42
3.64
6
8621
5122
2500.1
419.9
174.9
100.0
65.6
35.0
21.86
14.99
8.33
5.30
4.37
7
10058
5976
2916.8
489.9
204.1
116.6
76.5
40.8
25.50
17.49
9.71
6.18
5.10
8
11495
6830
3333.5
559.9
233.3
133.3
87.5
46.6
29.15
19.98
11.10
7.06
5.83
9
12932
7683
3750.1
629.9
262.4
149.9
98.4
52.5
32.79
22.48
12.49
7.95
6.56
Содержание Multilin 239
Страница 6: ...TOC 4 369 MOTOR MANAGEMENT RELAY INSTRUCTION MANUAL TABLE OF CONTENTS ...
Страница 20: ...1 14 239 MOTOR PROTECTION RELAY INSTRUCTION MANUAL CHAPTER 1 OVERVIEW ...
Страница 48: ...3 10 239 MOTOR PROTECTION RELAY INSTRUCTION MANUAL CHAPTER 3 OPERATION ...
Страница 96: ...4 58 239 MOTOR PROTECTION RELAY INSTRUCTION MANUAL CHAPTER 4 PROGRAMMING ...
Страница 108: ...5 70 239 MOTOR PROTECTION RELAY INSTRUCTION MANUAL CHAPTER 5 MONITORING ...
Страница 149: ...CHAPTER 7 TESTING 239 MOTOR PROTECTION RELAY INSTRUCTION MANUAL 7 111 FIGURE 7 2 239 Hardware Block Diagram ...
Страница 150: ...7 112 239 MOTOR PROTECTION RELAY INSTRUCTION MANUAL CHAPTER 7 TESTING ...
Страница 152: ...A 2 239 MOTOR PROTECTION RELAY INSTRUCTION MANUAL CHAPTER A ...