Surge arrestors for photovoltaic systems
December 2010
Electrical Power & Protection
Dehn’s modular Type 2 DEHNguard M YPV surge arresters are designed for protecting low voltage equipment in photovoltaic systems. The innovative three-stage DC switching device enables the arresters to fulfil IEC 60364-7-712:2002-05 requirements for modern photovoltaic systems. The combined disconnection and short circuit protection prevents fire damage due to DC arcs. The module locking system fixes the protection modules in the base part of the arrester. Shock, vibration or mechanical impulses resulting from discharges do not affect the connection to the protection module.
In order to avoid incorrect insertion, the protective circuit is mechanically coded and is easily replaced without tools. Three types are available for protecting photovoltaic systems up to 600 V, 1000 V and 1200 V.
Green and red indication shows the readiness for operation. Apart from this visual indication, units also feature a three-pole terminal for remote signalling, which can be used as a make or break contact depending on the circuit concept.
The modular family incorporates multifunctional terminals on a standardised spacing for connection of conductors and bus-bars for easy wiring to other DIN mounted devices.
For more information contact Paul van As, Surgetek, +27 (0)11 792 1303, [email protected], www.surgetek.co.za
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