Description
2.8 Electronic trip unit ETU
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
Manual, 10/2018, L1V30499596002-01
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Operating elements (ETUs of the 6-series)
Navigation in the menus and input of protection parameters, settings, etc. are performed with
the control keys:
Control key
Meaning
Switches between the main menu symbols.
Goes back to the previous screen page.
Increases a parameter in parameter edit mode.
Goes to the selected menu level.
Confirms a parameter in parameter edit mode.
Switches between the main menu symbols.
Goes to the next screen.
Decreases a parameter in parameter display mode.
Returns to the start screen.
Cancels the operation.
Jumps one menu level up.
Shows the cause of a trip.
Tests the readiness of the ETU and can perform test tripping as a function test.
2.8.4
Characteristics of the ETU
The electronic trip units are suitable for all common distribution board systems, protect any
power distribution system from overcurrents, and have settable overload and short-circuit
releases. Depending on the type, the ETU can monitor the energy consumption and signal
anomalies via alarms.
The modular expandable functions of the ETUs of the 6-series can replace external devices,
such as voltage transformers and measuring devices for efficient load management and
power monitoring in one compact device and therefore reduce costs and engineering work.
The electronic trip units of the 6-series can be replaced with a metering module and sense
anomalies such as transient interruptions and voltage spikes, and run network analyses. The
protection functions can be specifically adapted to the circumstances of the installation with
these expanded options and therefore ensure optimum protection. Directional quantities that
depend on the direction of power flow can also be included in measurement and protection.
With the electronic trip units of the 6-series, the circuit breaker can also be integrated into
communication networks.
