EKF VA-99M EKF - Tripping Characteristics

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TRIPPING CHARACTERISTICS
1.05
1.31
2 5 10 12 20 30 I/Inom
Время срабатывания (сек)
Кратность номинального тока
t (мин)
0.2
0.5
1
10
5
2
100
50
20
1000
500
200
0.01
0.001
0.02
0.05
5
2
1
10
10000
5000
2000
50
150
20
100
3 4 6 8
0.1
1
2
3
Tripping curve of VA-99M 63
Table 7.1 - Values to test VA-99M 63 thermal trip units
 Tripping time, s Result
2*In ≤ 300 MCCB tripping
4*In ≤ 170 MCCB tripping
Tripping
characteristics of the
molded case circuit

In the diagrams, areas
1, 2, 3 have meaning:
1 - "cold" tripping area
of thermal trip unit;
2 - "hot" tripping area
of thermal trip unit;
3 - tripping area of
electromagnetic
trip unit.
Rated current ratio
Tripping time (sec)
T (min)