NL2-D20 2P Surge Protection Device

NL2-D20 2P Surge Protection Device

• High discharge capacity thanks to powerful zinc oxide varistors / spark gaps
• Low protection level, quick response
• Reliable control thanks to Thermo Dynamic Control disconnector with dual monitoring
• Fault indication by red mark in the inspection window
• Slim design (modular construction) according to DIN 43880
• Multifunctional terminals for connecting conductors and busbars
• Encapsulated, non-extinguishing zinc oxide varistor arrester for use in distributor housings
• Complete prewired unit for common system configurations, consisting of a base part and plug-in protection modules
• Plug-in arrester with dynamic separating device
• Application: Equipotential bonding (LPZ 2 to 3) and device protection in main and sub-distributors

The multi-pole surge arresters of NL2-D offer high safety and easy utilisation. The application-orientated product description makes it easier to choose the right complete prewired unit. Reduced installation errors and work are unbeatable advantages that can be offered to the customer. Both the dual monitoring unit for each circuit with Thermo Dynamic Control and the code of the plug-in protection module types preset by the manufacturer characterise the high reliability of the equipment. Damage caused by subsequent installation errors of the installer or the operator is unlikely. Apart from measuring the surface temperature of the high-capacity varistor, the Thermo Dynamic Control monitoring and disconnection device also evaluates the intensity of the discharge currents. Thus, it ensures that the surge arrester does not only change into a safe and isolated state at “standard” overloads but also remains safe if the device parameters are significantly exceeded.
Apart from the standard visual indication with green and red coloured marks, type NL2-D/… +FS provides a 4-pole terminal for remote signalling. As the remote signalling contact works also as a floating changeover contact, the remote signal can be used as a break or make contact according to circuit concept. The surge arresters of the NL2-D series provide multifunctional terminals for connection of conductors and busbars for easy wiring with other DIN rail mounted devices.

SPD Type 3 according to EN 61643-11

SPD Class III according to IEC 61643-1

Classification D according to E DIN VDE 0675-6

Technical parameters

Order information (Let’s take 320V as example)