Phase Failure - Eaton PKE series Handbuch

Motor-protective circuit-
breaker PKE12, PKE32 and
PKE65
42
Table 10:
CLASS
5
10
15
20

Phase failure

The PKE motor-protective circuit-breakers are phase failure
sensitive.
In the event of a phase failure, i.e., in the event of an imbal-
ance f 50 %, the tripping time will be reduced to Q 40 %
of the three-phase trip value.
If you intend to monitor an AC motor with a PKE motor-
h
protective circuit-breaker, the current must be conducted
via all three conductors in order to prevent early tripping.
Figure 16:
i
Caution!
DC motors cannot be monitored.
Overload protection for heavy starting
Rated operational current I
[A]
I
e
I
e
1.22 x I
e
1.41 x I
e
Wiring the PKE motor-protective circuit-breaker for
protecting AC motors (series connection of the
overload releases)
10/15 MN03402004Z-DE/EN
e CLASS