Trip Unit Etu745 - Siemens UL 489 Operating Instructions Manual

9.1.2

Trip unit ETU745

Overview
Mechanical RESET
for Bell Alarm
and remote trip
Scroll up
Trip unit
activated
Indications Overcurrent alarm
COMMUNICATIONS
EXTENDED
Rating Plug
Rotary coding switch long-time
delay pickup setting
Rotary coding switch short-time
delay pickup setting
Rotary coding switch
instantaneous pickup setting
Changeover switch ground-fault detection mode
Rotary coding switch ground-fault
pickup setting
Rotary coding switch ground-fault
alarm setting
Test button
Query button
1) The trip cause is stored internally for at least two days if the trip unit has been activated for at least 10 min before tripping
(for unlimited time with auxiliary power).
2) Changeover switch only accessible with removed module.
Electrostatic Discharge
Trip unit may become inoperative.
Before the protective cover is removed, ensure that the equipment to be connected, and also the operating 
personnel, are at the same potential.
9 – 2
2)
NOTICE
Option: Reset Lockout
prevents accidental resetting of the lock-out
mechanism after a trip
Option: Alphanumeric display
Scroll down
Trip unit error indicator
Thermal memory On/Off
Neutral conductor protection On/Off
Neutral conductor overload setting
Overload trip curve mode I
Rotary coding switch long-time delay setting
Rotary coding switch short-time delay setting
1)
Trip cause indicator
Sealing eyelet
Option: Ground-fault module
Ground-fault alarm
Indications
Ground-fault tripped
Rotary coding switch ground-fault time
2
delay setting t / I t
g g
Clear button
Test connector
2 4
t / I t