Eaton ZB12/XTOB BC1 Series Manual page 44

Motor-protective relays, overload monitoring of ex e motors
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Configuration
40
Example: I
10
8
6
4
2
1
40
20
10
8
6
4
2
1
0.8
0.6
0.4
0.2
0.1
1
Figure 6: Tripping characteristics of the motor-protective relay
The motor is reliably protected.
Short-circuit protection of the motor-protective
relays
The motor-protective 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.
i
Warning!
Only co-ordination type "2" is permissible for the
protection of Ex e motors.
/I
= 6, t
= 10 s
A
N
E
2
3
10/10 MN03407004Z-DE/EN
4
5
6
7 8 9 10
1

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