Eaton Moeller ZEV Series - Page 39

Annex
36
11/01 AWB2300-1433GB
Table 8: Assignment of the tripping delay to the tripping
classes
CLASS
t
tt
t
A
[s]
3 4 5 6 7.2 8 10
40 90.5 63.6 49.1 40.0 32.7 29.2 23.0
35 79.2 55.7 43.0 35.0 28.6 25.5 20.1
30 67.9 47.7 36.8 30.0 24.5 21.9 17.2
25
56.6 39.8 30.7 25.0 20.5 18.2 14.4
20 45.3 31.8 24.6 20.0 16.4 14.6 11.5
15 34.0 23.9 18.4 15.0 12.3 10.9 8.6
10
22.6 15.9 12.3 10.0 8.2 7.3 5.7
5 11.3 8.0 6.1 5.0 4.1 3.6 2.9
h
hh
h
In a 3-phase symmetrical tripping system, the deviation of
the tripping delay t
A
as of three times the tripping current
t
A
is g20 %.