Description
2.2 Possible uses and portfolio
Air circuit breaker 3WL10
18
Manual, 11/2017, L1V30499596002-01
Electronic trip unit (ETU)
The 3WL10 circuit breaker provides two series of electronic trip units: Electronic trip units of
the 3-series and electronic trip units of the 6-series. To ensure the protection function of the
device during operation at any time, all electronic trip units are powered via transformers in
each of the main circuits.
The current sensor of the 3WL10 comprises an iron-core transformer for powering the ETU
and a Rogowski coil for sensing the current to be able to detect operating states and fault
conditions precisely. Each transformer can be optimized accordingly for its specific task.
Thanks to the high accuracy of current measurement, the 3WL10 air circuit breaker is
suitable for power/energy measurement. In addition, precise and sensitive adjustment of
ground fault current monitoring is possible.
Depending on the type, the electronic trip units provide the following protection functions:
●
Overload protection LT (Long Time)
Adjustable in steps of 40 % to 100 % of the rated current I
n
of the air circuit breaker.
●
Short-time-delayed short-circuit protection ST (short time)
for time-selective response in case of a short-circuit
●
Instantaneous short-circuit protection INST
●
Protection against residual currents to ground GF (ground fault).
The electronic trip units of the 6-series also provide enhanced protection functions that can
protect against power system anomalies affecting the voltage, frequency, and power flows,
and can provide additional information for energy management and communication
functions:
●
Metering functions
●
Communication
●
Flexible, local, digital inputs and outputs, and an external function box
●
Software commissioning support with powerconfig
●
Test and analysis options and archiving with parameterization and test devices TD410 or
TD420 and the software powerconfig / powerlog
Summary of Contents for SENTRON 3WL10
Page 1: ......
Page 2: ......
Page 8: ...Table of contents Air circuit breaker 3WL10 6 Manual 11 2017 L1V30499596002 01 ...
Page 170: ...Operation 6 3 Troubleshooting Air circuit breaker 3WL10 168 Manual 11 2017 L1V30499596002 01 ...
Page 180: ...Technical specifications Air circuit breaker 3WL10 178 Manual 11 2017 L1V30499596002 01 ...
Page 199: ...Air circuit breaker 3WL10 Manual 11 2017 L1V30499596002 01 197 Circuit diagrams 10 ...
Page 212: ...Circuit diagrams Air circuit breaker 3WL10 210 Manual 11 2017 L1V30499596002 01 ...
Page 233: ......
Page 234: ......