ZE/XTOM overload relays
32
09/15 MN03407003Z-DE/EN
Re-closing
After tripping, the bimetallic releases must first cool down
before the overload relay can be reset. Manual and auto-
matic reset can be selected by means of a selector switch
(
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
ZE/XTOM overload relay.
Test function
An additional Test button enables the operation of the
auxiliary contact to be checked. The Test button has a dual
function here:
• Pressing the Test button opens the break contact 95-96.
When the button is released, the break contact closes
again. This function can also be used to switch off the
motor manually.
• Pulling the Test button will trip the overload relay.
The N/C contact 95-96 opens and the N/O contact 97-98
closes. After the Test button is released, the overload relay
must be reset in the same way as after normal tripping
(
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Danger!
For explosion protection, it is only permissible to
reset/switch on the motor protection relay manually, after
the bimetallic release of ZE/XTOM has cooled down, or
automatically via a control interlock circuit for the motor
or electrical machinery.
Resets may be carried out at the installation or by trained
personnel in the control room.