Surge arrester T1+T2 MOV 4P TN-S/TT network Iimp=50 kA In=50kA Up1, 2kV SPA931

Protection of electrical installations against overvoltage

This four-pole surge arrester, designed for TN-S and TT networks, is a key element ensuring the safety of electrical installations in residential, commercial and industrial buildings. The device effectively protects against the effects of lightning strikes and switching surges, minimizing the risk of damage to sensitive electronic equipment. The construction based on MOV (Metal Oxide Varistor) technology guarantees reliable protection and long service life.

Functionality and application

The SPA931 surge arrester is designed for mounting on a TH-35 mm DIN rail. Its versatility makes it suitable for use in various types of installations, both new and modernized. Thanks to the high lightning impulse current (Iimp 50 kA) and surge current (12.5 kA), it provides effective protection even in the event of strong discharges. The built-in signaling contact and control lamp facilitate monitoring the device's status and quick reaction in the event of a failure. Energy coordination with end devices increases the efficiency of the entire overvoltage protection system.

Key features and benefits

• Versatility: Compatible with TN-S, TT and TN-C-S networks, allowing for wide application in various types of installations.
• High efficiency: Lightning impulse current at 50 kA guarantees protection against strong lightning strikes.
• Status indication: Built-in signaling contact and control lamp inform about the correct operation of the device or the need for intervention.
• Safety: Compliance with IEC 61643-11 standard ensures a high level of safety and reliability.
• Easy installation: Mounting on a standard TH-35 mm DIN rail facilitates and speeds up installation.
• Device protection: Protects sensitive electronic devices from damage caused by overvoltages, which translates into savings and avoiding downtime.
• Durability: Made of high-quality materials, ensuring long life and reliable operation for many years of use.
• Wide range of wires: Supports wires with a cross-section of up to 35 mm² (solid/stranded) and 25 mm² (flexible) ensures compatibility with various types of cabling.

The SPA931 surge arrester is characterized by a lightning impulse current (Iimp) of 50 kA, a surge current (10/350 µs) of 12.5 kA, an AC rated voltage of 415 V and a voltage protection level Up of ≤ 1.2 kV. It has 4 poles and is designed for mounting on a TH-35 mm DIN rail. The device is compatible with TN-S, TT and TN-C-S networks.

The SPA931 surge arrester is an investment in the safety and reliability of the electrical installation – both for professionals involved in electrical installations and for end users who value peace of mind and protection of their equipment.