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

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 with...

Wiring diagram Wiring diagram measuring current transformers PE LI L2 13 N 50 mm 1 - A1, A2 Connection to supply voltage Us cable of measuring current transformer external test and reset button * The measuring range must be set according to the response value in the evaluator.

Overvoltage category/pollution degree III/2 Rated impulse voltage 2.5 kV Overvoltage category/pollution degree III/2 Rated impulse voltage 4 kV Protective separation (reinforced insulation) between Switching elements Number of switching elements 2 x 1 changeover contact Operating principle N/C operation Electrical endurance, number of cycles 10000 Rated operational voltage 230 V 230 V 24 V 110 V 220 V Rated operational voltage UL 200 V 200 V 24 V 110 V 200 V Rated operational current 5 A 3 A 1 A 0.2 A 0.1 A Minimum contact rating 1 mA at AC/DC > 10 V EMC IEC 60947-2 annex M (limit value class...

Rated frequency Absolute values of the voltage range 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 transformer. To prevent nuisance tripping, the measuring current transformers should...