Surge arrester type 1 for transient voltage and lightning protection
25 - 100 kA SIEMENS Low-Voltage Power Distribution

Type 1 lightning arresters protect low-voltage systems against overvoltages and high surge currents that can be triggered by direct or indirect lightning strikes.

The protection level is lowered to 1.5 kV by the lightning arresters.

The lightning arresters are enclosed and suitable for mounting in the precounter sector.

All spark gaps are tripped. For this reason, decoupling reactors are no longer required for the installation of overvoltage protection devices.

The lightning arresters are tested using wave-shaped lightning impulses, 25 ... 100 kA with waveform 10/350 µs.

Benefits
- The rated arrester voltage is a uniform 350 V AC. This increases safety in systems with extended voltage overshoots.
- All lightning arresters are fitted with a mechanical fault indication that does not require an extra power supply. This means they can be installed in the precounter sector, where electrical plants can be protected particularly effectively.
- The protective modules are plug-in versions. No dismantling of electrical wires required when replacing the protective modules. When taking insulation measurements, the protective modules are simply removed in order to ensure disconnection from the power supply.
- All lightning arresters have a remote signaling contact, which signals if the device fails.