Siemens SENTRON ACB – Microprocessor Based Trip Unit –
3WA1220-3AF42-4EA4
The Siemens 3WA1220-3AF42-4EA4 is a SENTRON 3WA
series Air Circuit Breaker (ACB) engineered for advanced protection,
monitoring, and reliable switching in low-voltage power distribution systems.
It is widely used in main LT panels, PCC switchboards, industrial plants,
commercial complexes, infrastructure facilities, and critical power
applications where intelligent protection and operational reliability are
essential.
This ACB is equipped with a microprocessor-based
electronic trip unit that delivers precise protection against overload,
short-circuit, and fault conditions. The intelligent trip system supports
accurate protection coordination, real-time diagnostics, system monitoring, and
improved electrical safety in modern power distribution networks.
The SENTRON 3WA platform offers compact modular
construction with digital-ready functionality, making it suitable for smart
energy management and demanding industrial electrical applications.
Key Features
|
Parameter |
Specification |
|
Product Model |
3WA1220-3AF42-4EA4 |
|
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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