Earth leakage circuit breaker Doepke

Circuit-breakers with residual current trip (CBR) switch high currents, protect equipment, cables and lines against overcurrent and protect people against electric shock. DFL 8 are compact devices with integrated auxiliary switch and terminals for large conductor cross-sections. Type B switches are AC-DC sensitive at frequencies of 0 Hz (smooth residual currents) to 150 kHz. They have increased resistance to surge currents and lightning. Switches with the characteristic curve NK provide classic fire protection of 300 mA at frequencies up to 150 kHz. They are optimised for facilities at risk of fire. Switches of this variant have a fixed residual response current of 30 mA for the protection of persons. They therefore provide fault and fire protection as well as additional protection (personal protection, protection in the event of direct contact). Devices in the standard design are intended for monitoring circuits with a rated voltage of 230 V, 400 V and a rated frequency of 50 Hz. Properties: fixed rated residual current of 0.03 A; rated currents from 100 A to 250 A; rated voltage 230 V, 400 V AC; four-pole; detection of smooth DC residual currents and AC and pulsating DC residual currents; high tolerance against fluctuations in the auxiliary voltage for the detection of type B residual currents; trips independent of mains and auxiliary voltage in the event of type A residual currents and overcurrent; high short-circuit switching capacity; terminals up to 185 mm2; high surge current strength, i.e. low tendency to faulty trips due to transient residual currents; thresholds adjustable for instantaneous and slow-blow overcurrent trip; integrated auxiliary switches; Mounting: mounting on mounting plate; any installation position; supply from below; Application areas: power supplies to purpose-built buildings as well as industrial facilities with TN-S, TT and TN-C-S networks with high short-circuit power; In IT networks, the residual current trip of the CBR can be set to switch off in the event of a second earth fault; Thanks to its AC/DC sensitive residual current trip. this AC/DC sensitive CBR is especially suitable for protecting systems with electronic equipment that is not galvanically isolated from the mains at its inputs; use for residual current protection in TN-C networks is excluded.