User Manual

Description
2.4 Electronic trip unit ETU600
3WA Air Circuit Breakers
Equipment Manual, 05/2021, 92310000002-03
91
2.4.4.5 Battery
The internal clock of the ETU600 electronic trip unit is powered by a lithium battery. The
charge status is shown in the status bar of the display.
Battery full
Battery empty, replacement necessary
The service life of the battery depends on the ambient conditions; it is at least five years. The
battery can be replaced on site. To do this, the operator panel of the circuit breaker must be
removed, see Chapter Preparatory and concluding installation steps for the installation of
internal accessories (Page 151). The battery compartment is then accessible from the side
without dismantling the ETU600.
The lithium battery can be ordered as a spare part, see Chapter Replacement battery for the
ETU600 electronic trip unit (Page 321).