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3SB71LB, RCD blocks

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

●   Assembly on side with MCBs

●   Protection against the effects of sinusoidal alternating earth fault currents

●   Protection against indirect contacts and additional protection against direct contacts


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): 40, 63

●   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 (Icn) : Icn of the associated MCB

●   Rated residual breaking capacity lm: Icn of the associated MCB

●   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): 2.8

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

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

●   Altitude (meters): Max. 2000


Instruction of type code

3SB71LB.1


Features

●   Electronic Type, voltage dependent and Electromagnetic type,voltage independent

●   Assembly on side with MCBs 3SB71 series


Selection and ordering data

Electronic Type

3SB71LB.2


Electromagnetic type

3SB71LB.3


3SB71LB.4

Outline and installation dimensions

3SB71LB.5


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