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LINETRAXX® MRCDB423

LINETRAXX® MRCDB423
6Pages

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LINETRAXX® MRCDB423 Modular residual current device type B for additional protection (protection against indirect contact) in earthed systems (TN and TT systems)

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Modular residual current device type B for additional protection (protection against indirect contact) in earthed systems (TN and TT systems) Product description The AC/DC sensitive MRCDB423 with the corresponding CTUB101-CTBC… measuring current transformers are used as additional protection (protection against indirect contact) in earthed systems (TN and TT systems) in which AC or DC fault currents may occur. Part of these systems are particularly loads containing six-pulse rectifiers or one-way rectifiers with smoothing, such as converters, battery chargers, construction site equipment...

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Connection to supply voltage Us 1 Socket for connection cable of measuring current transformer T/R Connection for a combined external test and reset button 11, 12, 14 Alarm relay K1 (alarm) 21, 22, 24 Alarm relay K2 Wiring diagram measuring current transformers * The measuring range must be set according to the response value in the evaluator.

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Technical data MRCDB423 Insulation coordination acc. to IEC 60664-1/IEC 60664-3 Switching elements MRCDB423-D-1: Rated voltage 100 V Overvoltage category/pollution degree III/2 Rated impulse voltage 2.5 kV MRCDB423-D-2: Rated voltage 250 V Overvoltage category/pollution degree III/2 Rated impulse voltage 4 kV Protective separation (reinforced insulation) between Number of switching elements Operating principle Electrical endurance, number of cycles Contact data acc. to IEC 60947-5-1: Utilisation category Rated operational voltage Rated operational voltage UL Rated operational current...

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Ordering details MRCDB423 Response range IΔn 30 mA…3 A 1) Absolute values of the voltage range External measuring current transformers Installation instructions All current-carrying cables must be routed together through the measuring current transformer. Never route an existing protective conductor through the measuring current transformer. The primary conductors may only be bent from the specified minimum distance. The minimum bending radius specified by the manufacturers must be observed. * Distance to 90° angle = 2 x external diameter The cables must be centred in the measuring current...

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LINETRAXX® MRCDB423 6Pages

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LINETRAXX® MRCDB423
6Pages