Siemens SENTRON ACB – Microprocessor Based Trip Unit – 3WA1225-3AF42-4EA4
The Siemens 3WA1225-3AF42-4EA4 is a SENTRON 3WA
series Air Circuit Breaker (ACB) designed for advanced protection,
monitoring, and switching in low-voltage power distribution systems. It
is widely used in main LT panels, PCC switchboards, industrial facilities,
commercial buildings, utilities, data centers, and infrastructure projects
where intelligent protection and reliable switching performance are essential.
This ACB is equipped with a microprocessor-based
electronic trip unit that provides accurate protection against overload,
short-circuit, and fault conditions. The intelligent trip system supports
selective coordination, real-time diagnostics, system monitoring, and enhanced
operational safety for modern electrical distribution networks.
The SENTRON 3WA platform combines compact modular
design with digital-ready functionality, making it suitable for smart energy
management and demanding industrial applications.
Key Features
|
Parameter |
Specification |
|
Product Model |
3WA1225-3AF42-4EA4 |
|
Brand |
Siemens |
|
Series |
SENTRON 3WA |
|
Product Type |
Air Circuit Breaker (ACB) |
|
Trip Unit Type |
Microprocessor-based electronic trip unit |
|
Protection Functions |
Overload, short-circuit, fault protection |
|
Installation Type |
Fixed / draw-out execution dependent |
|
Number of Poles |
3 Pole / 4 Pole variant dependent |
|
Rated Operational Voltage |
Up to 690 V AC |
|
Frequency |
50/60 Hz |
|
Application |
Main LT power distribution |
|
Communication Capability |
Intelligent monitoring support |
|
Standards |
IEC 60947-2 |
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