GE IAC77B, Руководство пользователя

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GEK-34055
The one second thermal ratings are listed in Table IV.
TABLE IV
TIME OVE RCURRENT UNIT 1-SEC. RATING
K
(AMPS) (AMPS)
0.5 - 4. 0 125. 0
15.625
1.5 - 12. 0 260:0
15.0
260.0 67,600
For ratings of less than one second, the rating may be calculated according to the formula
I
where T is the time in seconds that the current flows.
The continuous ratings of the time overcurrent units are shown in Table V.
TABLE V
0. 5 - 4. 0 AW RANGE
TAP
0. 5 0. 6
0. 7 0.8 1. 0 1.2
1.5 2.0
2.5 3. 0
4. 0
RATING 3.5
3.7
4. 0 4.5 5.0
5. 5 6.0 7.0
8. 0 9.0 10. 0
1. 5 - 12. 0
Af1>
RANGE
TAP 1.5 2.0 2.5 3.0 4.0
7.0 8. 0 10.0
12.0
RATING 9.5 10. 5 1L5 125" 1 4.0
1
8.
0 19.0
20.0
20.0
2. 0 - 15.0
AMP
RANGE
TAP 2. 0 2.5 3.0 4.0 5.0 6.0 7.0 8. 0 10. 0 12. 0 15. 0
RATING 10. 0 1 1. 0 12. 0 13.0 15. 0 17.0 18.0 19. 0 20.0 20.0
20. 0
INSTANTANEOUS UNIT
The instantaneous unit has a double wound coil for operation on either one of two ranges. Any setting
obtained in the lower range (series connected) is doubled, .within ±3�when the unit is connected for high
range operation (parallel connected).
The instantaneous unit has a continuous rating of 1.5 times minimum setting or 25 amperes whichever
is smaller. Example: The 2. 0-16. 0 ampere instantaneous unit when set on the low range (2.0-8. 0 amperes)
has a continuous rating of 3. 0 amperes, and when connected for high range operation (4.0-16. 0 amperes)
has a continuous rating of 6.0 amperes. The continuous and one second ratings for the instantaneous unit
are shown in Table VI.
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