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3SR8-K, from 0.11 to 14 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
Availability:

Applications and functions for thermal relay

●   Protecting the loads from overload and phase failure

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

●   Used for the protection of motors


Instruction of type code

3SR8-K.1


Techinical specifications for assembled thermal relay of type 3SC8-K

●   Type: 3SR8-K

●   Standard: IEC 60947-4-1

●   Tripping class: 10 A

●   Number of connecting pin: 4

●   Rated operational voltage Ue (V): up to 690

●   Rated insulation voltage Ui (V): 690

●   Rated impulse withstand voltage Uimp (kV): 6

●   Rated current range In (A):

    0.11-0.16, 0.16-0.23, 0.23-0.36, 0.36-0.54,

    0.54-0.8, 0.8-1.2, 1.8-2.6, 2.6-3.7,

    3.7-5.5, 5.-8, 8-11.5, 10-14

●   Signalling: Trip indicator

●   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

●   Mounting: directly under the contactor


Selection and ordering data

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

3SR8-K.2



Tripping curve of thermal relay 3SR8-K

Average operating time related to multiples of the current setting (Class 10 A)

3SR8-K.3

1. Setting: at lower end of scale

2. Setting: at upper end of scale


Outline and installation dimensions (3SC8-K, 3SR8-K)

3SR8-K.4


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