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3SM18, from 0.1 to 80 A

Independent power supply with build-in power source,directly draws power from the incoming end to avoid the risk of protection function failure caused by external power supply failure.

● Overload protection
● Short circuit protection
● Isolation
● Controlling
● Used in residential building, non-residential building, industry, energy and infrastructure
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Applications and functions

●   Providing motor overload protection and short-circuit protection


Instruction of type code

3SM18.1



Technical specifications

3SM18.2


Selection and ordering data

3SM18

3SM18.3


3SM18 with enclosure

3SM18.4


3SM18-2-AV Under-voltage release

3SM18.5


3SM18-2-AS Shunt release

3SM18.6


Selection and ordering data

3SM18-2-AN11 Auxiliary contact

3SM18.7


3SM18-2-AD Auxiliary Alarm

3SM18.8


Enclosure

3SM18.9


Tripping Curve

Average operating times at 20 ºC related to multiples of the setting current

1: 3 poles from cold state; 2: 2 poles from cold state; 3: 3 poles from hot state

3SM18.10


Outline and installation dimensions

3SM18.11


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