Siemens 3WJ Air Circuit Breaker (ACB) – Microprocessor
Based Trip Unit – 3WJ1112-2AF62-1AA0Z
The Siemens 3WJ1112-2AF62-1AA0Z is a SINOVA /
SENTRON 3WJ series Air Circuit Breaker (ACB) designed for reliable
protection of low-voltage power distribution systems in industrial
plants, PCC panels, main LT switchboards, commercial buildings, and
infrastructure projects. It is used for applications where high fault
levels, system selectivity, and intelligent protection coordination are
required.
This model belongs to the 3WJ1112 frame size (1250A
class) and is equipped with a microprocessor-based electronic trip unit
(ETU) that provides advanced protection functions such as overload,
short-circuit, and earth fault protection, with adjustable settings for
improved system safety and coordination.
With a rated current of 1250A and a breaking
capacity of up to 50kA at 440V AC, it is suitable for heavy-duty
industrial power distribution networks requiring reliable switching and
high fault interruption capability.
Key Features
|
Parameter |
Specification |
|
Product Model |
3WJ1112-2AF62-1AA0Z |
|
Brand |
Siemens |
|
Series |
SINOVA / SENTRON 3WJ |
|
Type |
Air Circuit Breaker (ACB) |
|
Frame Size |
3WJ1112 |
|
Rated Current |
1250 A |
|
Number of Poles |
4 Pole |
|
Breaking Capacity (Icu) |
50 kA @ 440 V AC |
|
Rated Voltage |
440 V AC |
|
Frequency |
50/60 Hz |
|
Protection Type |
Overload, short-circuit, earth fault |
|
Trip Unit |
Microprocessor-based ETU |
|
Mounting Type |
Draw-out type |
|
Standards |
IEC 60947-2 |
|
Application |
Main incomer / feeder protection |
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