Westinghouse KC-4, Installation, Operation & Maintenance Instructions Manual

Page: 122 / 178

TY P E S B F U STA T I C CI RCU I T B R E A K E R F A I L U R E R E LA Y
1 8
16
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6 4
2 0
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8
7
6
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5
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1- 2
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OPERATI N G T I M ES
O PERAT I N G T I M ES
2 4 6
8
10 1 2 14 16
MULT I PL E S O F PICK- UP VALUE
Fig. 3 Operating Time of Overcurrent Unit Module.
18 20
5 3 8 1 2
�)
C U R R E N T REDUCED TO
t90%
OF
80 %
OF P.
u
0 2 4 6 8 10 12 14 16 18 20
Fig. 4 Reset Time Curve of Overcurrent Unit.
50%
O F P.U
.
0.0%
OF P.U.
22 24 26 28 40
8 6 3 A5 2 9
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