Engineering
48
03/15 MN03407004Z-DE/EN
Example: I
A
/I
N
= 6, t
E
= 10 s
Figure 6:
Tripping characteristic of the overload relay
The motor is reliably protected.
Short-circuit protection of the overload relays
The overload relays are short-circuit protected by means of
fuses. When the relay is mounted directly onto a contactor
relay, the corresponding primary fuse of the contactor relay
is taken into account accordingly.
1
0.1
0.2
0.4
0.6
0.8
1
2
4
6
8
10
20
40
1
2
4
6
8
10
2
3
4
5
6
7
8 9 10
J
min
s
N
1
i
Warning!
Only type 2 coordination according to EN 60947-4-1 may
be used for the protection of Ex e motors.
Summary of Contents for ZB12/XTOB BC1 Series
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