Reset - Eaton ZB12/XTOB Handbuch

10/10 MN03407004Z-DE/EN
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Figure 5: Wiring of the motor-protective relay for the protection of
AC or DC motors (bimetallic release switched in series)
(a Section "Tripping characteristics" as of page 55)

Reset

After tripping, the bimetallic releases must first cool down
before the motor-protective relay can be reset. Manual and
automatic reset can be selected by means of a selector
switch (a section "Reset"to page 51).
In auto mode, the contacts automatically fall back after the
bimetallic releases have cooled down, whereas in manual
mode the tripping must be acknowledged locally on the
motor-protective relay.
Danger!
To ensure explosion-proof operation, the motor-protective
relay may only be reset/switched on manually, or
automatically via a control interlock circuit for the motor
or electrical machinery, after the bimetallic release has
cooled down.
A manual reset may be carried out by trained personnel
locally or in the control room.
Device description
37