Description

The Raychem Low Voltage (LV) Surge Arrester up to 440 V is a metal-oxide varistor (MOV)-based protective device designed to safeguard low-voltage electrical systems against transient overvoltages caused by lightning strikes and switching operations. It provides a low-impedance path to earth during surge events, limiting the surge voltage and protecting connected equipment from damage. It is suitable for use in low-voltage overhead distribution lines, distribution transformers, consumer service entrances, and industrial electrical installations.

Key Features :

• Rated for low-voltage systems up to 440 V AC continuous operating voltage.
• Protects against lightning-induced and switching overvoltages.
• Metal Oxide Varistor (MOV) technology with fast response time (typically less than 100 ns).
• Suitable for indoor and outdoor applications.
• UV-resistant and flame-retardant polymer housing.
• Integrated disconnector with pre-attached line lead for easy installation.
• Visible failure indicator for quick maintenance checks.
• Tool-free installation.
• Tested in accordance with IEC 61643-1, EN 61643-11, and high-current impulse testing as per IEC 60099-4.

Typical Technical Specifications (LVA-440B) :

• Maximum Continuous Operating Voltage (Uc): 440 V AC
• Nominal Discharge Current (In): 10 kA (8/20 µs)
• Maximum Discharge Current (Imax): 100 kA
• High Current Impulse (4/10 µs): 100 kA
• Operating Frequency: 48–62 Hz
• Operating Temperature: –40°C to +70°C
• Protection Class: Type II / Class II

Applications :

• Low-voltage overhead distribution networks
• Distribution transformers
• Consumer service connections
• Industrial and commercial electrical panels
• Utility power distribution systems
• Protection of sensitive electrical and electronic equipment against transient overvoltages

Standards: IEC 61643-1 / EN 61643-11 (Type II/Class II), with additional testing per IEC 60099-4.