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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:
<ul>
<li>Suitable for AC and DC systems/applications for protection against induced and switching overvoltages</li>
<li>To be installed on the border between zones LPZ 1 and LPZ 2</li>
<li>Visual indicator of the varistor status – functional/to be replaced</li>
<li>Signaling with remote contact of the varistor status. Connector (07P.01) included in the 
packaging (depending on version)</li>
<li>Varistor and spark gap modules, replaceable</li>
<li>Compliant with EN 61643-11: 2012</li>
<li>35 mm rail (EN 60715) mounting, 17.5 mm per pole</li>
</ul>
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
<ul>
<li>Varistor protection +/– or L/N (GND); -/+ or GND 
(L/N)</li>
<li>Replaceable module</li>
</ul>
– 7P.21.8.275.x020 SPD Type 2 single-pole usable in single-phase or three-phase applications (230/400 V)
<ul>
<li>Varistor protection L/N (GND) -GND/(L/N)</li>
<li>Replaceable module</li>
</ul>
-7P.21.8.440.x020 SPD Type 2 unipolar for three-phase systems with nominal voltage 400 V AC
<ul>
<li>Varistor protection L/N (GND) -GND/(L/N)</li>
<li>Replaceable module</li>
</ul>

Function and features:

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Type 7P.21 – Surge Protection Device (SPD) - Finder

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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

Type 7P.21 – Surge Protection Device (SPD)

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7P Series - Surge Protection Devices (SPD)

1.000 V DC Max (or N+PE connection for spark gap modules)

275 V Max for SPD Type 1 “Low Up”, Type 2 (Uc) (for UN = 230-240 V AC) and Type 3

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