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3SR8-F, from 30 to 630 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 for thermal relay 3SR8-F

●   Protecting the loads from overload and phase failure

●   Implementing short-circuit protection by means of fuse or circuit breaker

●   Used for the protection of motors


Instruction of type code

3SR8-F.1


Techinical specifications for thermal relay 3SR8-F

Type

3SR8-F53

3SR8-F73

Standard

IEC 60947-4-1
Tripping class 10 A, 20 A
Rated operational voltage Ue (V) 1000
Rated working current Ie (A) 220 630
Setting range (A) 30-220 200-630
Reset Manual on front of relay
Rated insulation voltage Ui (V) 1000
Rated impulse withstand voltage Uimp (kV) 6
Tightening torque (N·m) 0.8
Degree of protection IP20
Ambient air temperature (ºC) -5 to +40, max. 95 % humidity
Storage temperature (ºC) -40 ~ +75
Maximum operating altitude (meters) 2000
Flame resistance V1


Selection and ordering data

3SR8-F thermal relay matched with contactor 3SC8-F

3SR8-F.2


Tripping curve for thermal relay 3SR8-F

3SR8-F.3


Outline and installation dimensions (Series 3SR8-F)

3SR8-F.4


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