DEHNbloc Maxi 440 / 760
Coordinated Lightning Current Arrester for Nominal Voltages of 400 V and 690 V
- Spark-gap-based lightning current arrester
- Extremely high lightning current discharge capacity
- High follow current extinguishing capability and limitation due RADAX Flow technology
- Directly coordinated with DEHNguard surge protective devices without additional cable length
- Operating state / fault indication by green / red indicator flag in the inspection window
DEHNbloc Maxi 1 440 FM: With remote signalling contact for monitoring device (floating changeover contact)
DEHNbloc Maxi 1 760 FM: Coordinated single-pole lightning current arrester with high follow current limitation for UC = 760 V
With remote signalling contact for monitoring device (floating changeover contact)
For a large number of industrial applications, this makes effective protection against direct and indirect lightning currents possible.
Be it in a wind turbine or a stand-alone low-voltage installation of an industrial enterprise, DEHNbloc Maxi devices effortlessly fulfil the specified requirements.
Both the design of the protective circuit and the enclosure specifically designed for this type of arrester are particularly adapted to high system voltages.
The proven RADAX Flow technology is the core element of the coordinated DEHNbloc Maxi 440 and 760 lightning current arresters. What makes these devices special is their ability to considerably limit mains follow currents and extinguish them within just a few milliseconds.
The patented RADAX Flow follow current limitation ensures that low-value fuses are not tripped by follow currents.
The ability to discharge lightning currents without destruction and to suppress mains follow currents without tripping upstream overcurrent protective devices ensures a high degree of availability in electrical installations.
The operating state / fault indicator of the coordinated lightning current arresters does not cause operating currents and immediately shows the operating state of the devices. Apart from the standard visual indication with green and red indicator flags, DEHNbloc Maxi 1 ... FM features a three-pole remote signalling terminal. As the remote signalling contact is designed as a floating changeover contact, the remote signal can, depending on the circuit concept, be used as a make or break contact.