14
BR 230/400-10...400
Fusing according to allocation type „1“:
As pre-fuses, we recommend to use line protection fuses (utilization category gL) or automatic
circuit-breakers with tripping characteristic B, C, D or K.
Taking into account the maximum braking currents that occur (normally the nominal/rated device
current), we recommend fuses according to table 2, column 3.
Note:
Wiring cross-sectional area according to DIN VDE 0100-430,
DIN EN 57100-430.
Fusing according to allocation type „2“:
The power semiconductors are to be protected by fuses of the utilization category gR (semicon-
ductor fuses, high-speed fuses). However, since these fuses do not ensure line protection, it is
necessary to use additionally line protection fuses (utilization category gL).
As for the dimensioning of the line protection fuse (gL), please refer to table 2, column 3.
To protect the semiconductors it is necessary to select gR-fuses featuring cutoff-I²t-values of the
ranges indicated in table 2, column 4. In this connection, the current value of the selected fuse
should not be smaller than the braking current to be expected (nominal/rated device current).
Note 1:
On the basis of the recommended I²t-value, braking current, and possibly the
c.d.f., the fuse supplier is able to select a suitable type. Due to the great
variety of producers, sizes and types, PETER electronic does not
recommend any particular fuses.
Note 2:
If the value of the fuse or cutoff-I²t-value is selected too small, it may happen
that the semiconductor fuse reacts during braking..
Table 2
Column 1
Column 2
Column 3
Column 4
max. Braking
current / Rated
device current
Device type
Fuse value
allocation type „1“
Recommended range for
cutoff-I²t-value of semiconductor
protection fuses allocation type „2“
10A
BR …-10
10A
30... 38 A²s
20A
BR …-20
16A
300… 650 A²s
40A
BR …-40
32A / 35A
1.400… 3.500 A²s
60A
BR …-60
40A
3.000 … 4.650 A²s
100A
BR …-100
63A
6.000 … 7.600 A²s
200A
BR …-200
125A
50.000 …76.000 A²s
400A
BR …-400
250A
200.000 … 305.000 A²s
