Eaton ZB12/XTOB BC1 Series, Manual

Page: 47 / 103

Description of device
43
03/15 MN03407004Z-DE/EN
Figure 5: Wiring of the overload relay for the protection of AC or
DC motors (bimetallic release switched in series)
(
a
Section "Tripping characteristics" as of Page 63)
Re-closing
After tripping, the bimetallic releases must first cool down
before the overload relay can be reset. Manual and
automatic reset can be selected by means of a selector
switch (
a
section "Reset"to Page 59).
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
overload relay.
j
Danger!
To ensure explosion-proof operation, the overload 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.
Resets may be carried out at the installation or by trained
personnel in the control room.