Description
2.8 Electronic trip unit ETU
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
70 Manual, 10/2018, L1V30499596002-01
Self-monitoring / diagnostics
Watchdog monitored (hardware, firmware)
● ● ● ● ●
Continuous CT and tripping coil monitoring
(tripping or only alarm)
● ● ● ● ●
Protection by temperature monitoring (can be
● ● ● ● ●
Thermal memory (LT adaptation) can be deac-
— — — ● ●
Write protection for communication
Deactivation of communication for access from
— — — ● ●
The rating plugs can be exchanged on the front of all electronic trip units. With this option of
exchanging the rating plug, the current rating can be reduced to adapt to a changed situation
of the overall installation. The I
n
of the rating plug remains less than or equal to the maximum
I
n
of the device. This function is suitable for installations for which further development is
planned or in cases, in which the power export could be temporarily limited (e.g. mobile
generator set).
The overload protection function (LT) can be deactivated if the "L off" rating plug version is
used in conjunction with the ETU of the 6-series.
For residual-current protection with a suitable summation current transformer, there are
rating plugs with a residual-current (Rc) protection function.
Communication of the ETUs of the 6-series (optional)
The electronic trip units of the 6-series can be expanded with communication connections
because of their modularity. Depending on the communication modules used, the following
protocols are available:
● Modbus RTU via RS485
● Modbus TCP via Ethernet and other IP communication
● PROFIBUS DP (planned for 2019)
● PROFINET IO (planned for 2019)
Communication is used for software integration into
● powerconfig for parameterization and maintenance
● powermanager for power monitoring and operational monitoring
● Totally Integrated Automation TIA for automation and process integration
● Energy automation
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