Description
2.5 Basic properties of the circuit breaker (3WL10 / 3VA27)
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
20 Manual, 10/2018, L1V30499596002-01
● Retrofittable functions for electronic trip units (ETUs)
Upgrading the electronic trip units is possible at any time. This is done simply by
replacing the ETU. For example, the residual current protection (Rc) can be added by
replacing the rating plug in the ETU660.
Rating plugs, the metering function, and communication modules for the electronic trip
units are available for fast and easy retrofitting and adaptation to changing requirements.
Subsequent upgrading of the ETUs of the 3-series to the ETUs of the 6-series is possible.
● Flexible communication / metering function
The use of modern communication-capable circuit breakers opens up completely new
possibilities in terms of start-up, parameterization, diagnostics, plant transparency,
maintenance and operation. This allows many different ways of reducing costs and
improving productivity in industrial plants, buildings and infrastructure projects to be
achieved:
– Simultaneous use of up to two different bus systems, such as PROFIBUS,
PROFINET, Modbus TCP, or Modbus RTU
– Fast and reliable parameterization
– Timely information and response can prevent plant stoppages
– Effective diagnostics management
– Measured values are the basis for efficient load management, for drawing up power
demand profiles, and for allocating energy to cost centers
– Preventive maintenance reduces the risk of expensive plant downtimes
– Metering function with a wide range of measured values, such as current, voltage,
energy, power
– The metering function picked off inside the circuit breaker enables a small space
requirement, reduced wiring work, savings on external voltage transformers, and
therefore an additional cost reduction.
● As incoming feeder, distribution, coupling and outgoing feeder circuit breakers in
electrical installations
● For switching and protecting motors, capacitors, generators, transformers, busbars, and
cables.
● When connected to an electronic I&C system, the circuit breaker offers a wide range of
options for monitoring network events.
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