Type B+ residual current circuit-breakers are AC-DC sensitive. They meet VDE fire protection requirements at 420 mA for frequencies up to 20 kHz. With our MI RCCBs, your mobile installations are optimally protected. They trip in the event of smooth DC residual currents ≥ 6 mA, thereby ensuring the protective function of upstream residual current circuit-breakers. Standard RCCBs are designed for circuits with 230/400 V at 50 Hz. The HD design makes our RCCBs particularly resistant to harmful environmental influences and therefore suitable for harsh environments.

tripping threshold of 6 mA for smooth DC residual currents , AC/DC sensitive for residual currents with frequencies and mixed frequencies of 0 Hz (smooth direct current) up to 20 kHz, Fire protection as per VDE 0100-420, mains-voltage-independent tripping when type A residual currents occur, voltage-dependent detection of smooth DC and AC residual currents with frequencies not equal to 50 Hz, full functionality with mains voltages from at least 50 V AC on any two active conductors, compact design for all rated currents, high short-circuit resistance, double-sided two-tier terminals for large conductor cross-section and busbar, switch position indicator, viewing window for labels, multifunction switch toggle with three positions: "on", "off" and "tripped", Neutral conductor position left

quick fastening to mounting rail, any installation position, supply preferably from above

Ideally suited for mobile use in power distributors e.g. for rental equipment, where upstream RCCBs of an unknown type are present. Due to the low DC tripping threshold, the AC-DC sensitive RCCB version MI also can be operated downstream of an RCCB Type A or F, commercial and industrial and also mobile installations with TT, TN-S and TN-C-S systems, where power electronics equipment is used without galvanic isolation from the mains, e.g. frequency converters, switching power supplies, high-frequency converters, photovoltaic installations and UPS equipment with frequency converters without transformers, Facilities at risk of fire

• Data sheet DFS4 025-4/0,03-B+ MI HD
• Operating instructions
• Technical information Derating graph for DFS 2/4
• Prospectus DFS 2 B/4 B
• Manual Manual RCDs Type B
• Technical information Tripping characteristics of DFS 4 Type B/B+
• Technical information dissipation power DFS 2/4
• Prospectus Circuit-breaker overview
• Prospectus DFS HD "heavy duty"
• Text for invitation to tender RTF
• Text for invitation to tender GAEB XML
• Text for invitation to tender GAEB 2000
• Text for invitation to tender GAEB 90
• Dimensional drawing Group view
• STEP file
• Wiring diagram
• Characteristic B+ 30 mA
• Labelling software DFS / DLS
• Download link Cadenas library