Type 7P.21 surge arresters, Single-pole , SPD Type 2 (1 varistor) usable in DC applications or systems
single phase AC in low voltage. Varistor protection +/– or L/N (GND); -/+ or GND
(L/N). Replaceable module. Available with remote contact for signaling the status of the varistor.

Features include:

• Suitable for AC and DC systems/applications for protection against induced and switching overvoltages
• To be installed on the border between zones LPZ 1 and LPZ 2
• Visual indicator of the varistor status – functional/to be replaced
• Signaling with remote contact of the varistor status. Connector (07P.01) included in the
  packaging (depending on version)
• Varistor and spark gap modules, replaceable
• Compliant with EN 61643-11: 2012
• 35 mm rail (EN 60715) mounting, 17.5 mm per pole

Also available in the following version:
– 7P.21.8.130.1015 SPD Type 2 single-pole usable in DC applications or single-phase AC low voltage systems

• Varistor protection +/– or L/N (GND); -/+ or GND
  (L/N)
• Replaceable module

– 7P.21.8.275.x020 SPD Type 2 single-pole usable in single-phase or three-phase applications (230/400 V)

• Varistor protection L/N (GND) -GND/(L/N)
• Replaceable module

-7P.21.8.440.x020 SPD Type 2 unipolar for three-phase systems with nominal voltage 400 V AC

• Varistor protection L/N (GND) -GND/(L/N)
• Replaceable module