Type AC residual current circuit-breakers only detect alternating fault currents. In the UK, they are only approved for use with fixed equipment, where it is known that the load current contains no DC components. RCCBs in the Hz design are intended for rated mains frequencies other than 50 Hz. The frequency range for tripping current detection remains unaffected by this.

tripping not dependent on mains and auxiliary voltage, sensitive to AC residual currents (type AC) , 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 or right

quick fastening to mounting rail, any installation position, supply from any direction

Power supplies to TT, TN-S and TN-C-S networks with mains frequencies > 50 Hz, Not permitted for use in TN-C networks; not permitted for protecting systems in which electronic equipment may cause pulsating or smooth DC residual currents or residual currents with frequencies not equal to 50 Hz. Comprehensive protection is not provided with an RCCB type AC. For these applications we recommend our residual current circuit-breaker type A or our AC/DC sensitive residual current circuit-breaker type B/B+.

• Operating instructions
• Data sheet
• Technical information Derating graph for DFS 2/4
• Technical information dissipation power DFS 2/4
• Prospectus Circuit-breaker overview
• Prospectus DFS HD "heavy duty"
• Dimensional drawing Group view
• STEP file
• Wiring diagram
• Labelling software DFS / DLS
• Download link Cadenas library