Type B residual current circuit-breakers are AC-DC sensitive. The SK characteristic limits the risk of unwanted tripping providing maximum system availability, for frequencies ranging from 0 to 150 kHz. With low tripping sensitivity at higher frequencies, our SK circuit-breakers are perfectly suited for use in facilities where preventive fire protection measures are provided by additional means. Selective circuit-breakers (S) are the ideal solution for systems with tiered distribution. In the event of a fault, only the downstream breaker in the affected section trips – ensuring targeted disconnection. Standard RCCBs are designed for circuits with 230/400 V at 50 Hz.

selective for all instantaneous RCCBs, for systems with high leakage currents in frequency range > 1 kHz, low sensitivity to transient leakage and residual currents thanks to high surge current strength , High level of immunity against leakage and residual currents due to operational conditions from frequency 1 kHz and higher, AC/DC sensitive for residual currents with frequencies and mixed frequencies of 0 Hz (smooth direct current) up to 150 kHz, high availability even of voltage-independent detection of smooth DC residual current and AC residual current with frequencies not equal to 50/60 Hz thanks to full functional compatibility with mains voltages from at least 50 V AC on any two active conductors, mains-voltage-independent tripping when type A residual currents occur , 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

Main distribution boards in power supplies to large areas with TN-S, TT and TN-C-S systems, with sub-distribution boards in which power electronics equipment may be used or connected, such as frequency converters, switching power supplies, high-frequency converters, UPS installations and photovoltaic systems. Selective residual current circuit-breakers in most cases protect the cables from the main distribution board to the sub-distribution boards, Systems with stacked distribution boards

suitable for use in 50 Hz AC networks, RCCBs for other frequencies available upon request, Not designed for use in direct current networks or on the output side of controlled electrical equipment such as frequency converters. , To ensure the selectivity of the RCCB, the rated residual current of the selective RCCB must be set at least one level higher than the downstream instantaneous switch.

• Data sheet DFS4 063-4/0,30-B SK S
• Operating instructions
• Prospectus Power for building sites
• 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 SK 300 mA
• Labelling software DFS / DLS
• Download link Cadenas library