Shelter Type 2 320 - 3 Plus NPE AC SPD

Shelter Type 2 320V AC (3+NPE) Surge Protection Device

The Shelter 320V AC Type 2 Surge Protection Device (SPD) is designed to protect three-phase AC power systems from dangerous transient overvoltage caused by lightning, switching surges, and grid disturbances. It diverts surge energy safely to earth, preventing damage to distribution panels, machinery, control systems, and sensitive electronic equipment.

This 3+NPE configuration is ideal for three-phase TN-S / TN-C-S systems. It offers replaceable modules, visual fault indication, and thermal protection providing reliable and long-term surge protection for residential, commercial, and industrial installations.

Key Features

• Rated voltage: 320V AC (3+NPE)

• Type 2 surge protection (AC)

• Suitable for 3-phase power networks

• High surge discharge capacity

• Protection against lightning & switching surges

• Built-in thermal disconnection safety

• Visual fault / status indication window

• Low residual voltage for better equipment safety

• Replaceable protection cartridges

• DIN-rail mounting quick & easy installation

• Strong, flame-retardant ABS housing

Technical Specifications

• Nominal voltage: 320V AC

• Configuration: 3+NPE

• Protection type: Type 2

• Max discharge current (Imax): up to 40kA / 60kA (model dependent)

• Response time: < 25 ns

• Protection mode: L-N / N-PE

• Mounting: DIN rail

• Body material: Flame-retardant ABS + metal parts

• Application: Three-phase AC power distribution

Applications

• Main & sub-distribution boards

• Three-phase industrial panels

• Commercial buildings

• Factory machinery & control systems

• UPS / power backup systems

• HVAC, motors and automation panels