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3SB71LN

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:

Functions

●   Switching and isolation function

●   Protection against overload and short-circuit currents

●   Protection against the effects of sinusoidal alternating earth fault currents

●   Protection against indirect contacts and additional protection against direct contacts.

●   Protection against fire hazard caused by insulation faults

●   Used in residential building


Technical specifications

●   Standard: IEC 61009-1

●   Type (wave form of the earth leakage sensed): AC, A

●   Number of poles: 2, 3, 4

●   Rated current In (A): 6, 10, 16, 20, 25, 32, 40

●   Rated voltage Ue (V AC): 230/400

●   Rated insulation voltage Ui (V AC): 500

●   Rated frequency Fn (Hz): 50/60

●   Rated residual currents IΔn (mA): 30, 100, 300

●   Rated breaking capacity acc. to IEC 61009-1 ultimate Icn (kA): 10

●   Rated breaking capacity acc. to IEC 60947-2 ultimate Icu (kA): 10

●   Rated residual breaking capacity IΔm (kA): 6

●   Rated impulse withstand voltage (1.2/50) Uimp (kV): 4

●   Dielectric test voltage at ind. freq. for 1 min. (kV): 2.5

●   Surge current resistance (wave 8/20) (A): 3000

●   Tripping characteristic: B, C, D

●   Characteristic B (In): 3-5

●   Characteristic C (In): 5-10

●   Characteristic D (In): 10-14

●   Electrical life (times): 4,000

●   Mechanical life (times): 10,000

●   Degree of protection: IP20, with connected conductors

●   Mounting position: Any

●   Conductor cross-sections

●   Solid and stranded (mm²): 0.75-35

●   Finely stranded with end sleeve (mm²): 0.75-25

●   Terminals

●   Terminal tightening torque (N·m): 2.5

●   Ambient temperature (°C): -25 ~ +45, max. 95 % humidity

●   Storage temperature (°C): -40 ~ +75

●   Altitude (meters): Max. 2000


References

●   Additional components: page 189 ~ 191


Instruction of type code

3SB71LN.1


Features

●   The combination of an RCCB and a miniature circuit breaker in a compact design for personnel, fire and line protection

●   Electromagnetic type, voltage independent

●   The MCB part protects lines against overload and short circuits and is available in characteristics B, C and D

●   The handle provides a clear indication of the contact position


Add-on devices

Auxiliaries

3SB71LN.6


Selection and ordering data

3SB71LN.2


Selection and ordering data

3SB71LN.3


Tripping characteristic curves

3SB71LN.4

Outline and installation dimensions

3SB71LN.5


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Address: No. 2588 Jinhai Road, Pudong, Shanghai, China

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