Doepke 091348HD DFS 4-pole 40A 0.03A Type B SK N-li HD RCD circuit breaker all-current sensitive

Residual Current Circuit Breakers (RCCB) disconnect the power supply when dangerously high fault currents occur, thus protecting people, animals, and equipment. DFS 4 are two- or four-pole residual current circuit breakers for single-phase or three-phase networks. In standard design, these compact devices are four division units wide. They are available with many different fault current types and designs with rated currents up to 125 A. The large double-decker terminals can accommodate large conductor cross-sections. The triggered position of the multifunction switch knob facilitates troubleshooting. The free labeling software assists with labeling. Type B switches are sensitive to all currents at frequencies from 0 Hz (smooth direct fault currents) to 150 kHz. They are also resistant to high surge currents and lightning. The SK series residual current circuit breakers provide fault current protection and high system availability. They feature lower sensitivity to higher frequencies. The SK characteristic is optimized for systems where fire protection is not required. Standard devices are designed for monitoring circuits with a rated voltage of 230, 400 V and a rated frequency of 50 Hz. With an airtight encapsulated tripping mechanism made of a special alloy and a stainless steel switch lock, HD version residual current circuit breakers are particularly protected against corrosion, harmful gases, moisture, and significant temperature fluctuations. In the all-current sensitive residual current circuit breakers in the ISO HD version, insulation testing can be performed up to 1000 V without prior disconnection.