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4.39
Date Code 20081022
Instruction Manual
SEL-787 Relay
Protection and Logic Functions
Basic Protection
Figure 4.19
U.S. Moderately Inverse Curve: U1
0.50
6.00
5.00
4.00
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2.00
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15.00
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8.00
.01
.5 .6 .7 .8 .9 1
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70
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80
10
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8
20
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90
Time in Seconds
Multiples of Pickup
Time in Cycles 60 Hz (50Hz)
3 (2.5)
6 (5)
15 (12.5)
30 (25)
60 (50)
600 (500)
150 (125)
300 (250)
1500 (1250)
3000 (2500)
6000 (5000)
Содержание SEL-787
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