Siemens UL 1066 User Manual

9 – 6
9.1.3 Trip unit ETU748
Overview
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) The switch is only accessible when the breaker front cover is removed.
NOTICE
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.
Option: Ground-fault module
Mechanical RESET
for Bell Alarm
Rating plug
Scroll up
Indicators
COMMUNICATIONS
EXTENDED
Rotary coding switch ground-fault
pickup setting
Rotary coding switch ground-fault
alarm setting
Query button
Te s t b u t t o n
Rotary coding switch long-time delay setting
Option: Reset Lockout
Option: Alphanumeric display
Scroll down
Thermal memory On/Off
Neutral conductor protection On/Off
Neutral conductor overload setting
Overload trip curve mode I
2
t / I
4
t
Rotary coding switch short-time delay setting
Trip cause indicator
1)
Indications
Ground-fault alarm
Ground-fault tripped
Rotary coding switch ground-fault time
delay setting t
g
/ I
2
t
g
CLEAR button
Test connector
Trip unit error indicator
Changeover switch ground-fault detection mode
2)
prevents accidental resetting of the lockout
mechanism after a trip
Rotary coding switch long-time
delay pickup setting
Rotary coding switch short-time
delay pickup setting
Trip unit
Overcurrent alarm
activated
Sealing eyelet
and remote trip

Siemens UL 1066 Specifications

General

Brand	Siemens
Model	UL 1066
Category	Circuit breakers
Language	English