Surge protectors of category B+C provide complete protection for the electrical installation and the devices powered by it. They limit overvoltages and reduce surge currents from both direct and indirect surges to the ground.

They feature a modular design and activation indication, meeting the protection requirements of category I and II.

Technical specifications:

• Nominal AC voltage [V]: 275
• Surge current (10/350) [kA]: 5
• Discharge current rating (8/20us) [kA]: 50kA
• Nominal current (8/20us) [kA]: 25kA
• Maximum continuous operating voltage AC [V]: 275
• Protection level [kV]: 1.5
• Size: 4 modules
• Number of poles: 4
• Cross-section of flexible cable with ring terminal [mm2]: 35
• Cross-section of rigid cable [mm2]: 35
• Maximum cross-section of flexible cable [mm2]: 35
• Mounting method: DIN rail
• Maximum wire cross-section (single/multiple) [mm2]: 35

Effective surge protection requires sequential multi-stage protection. A three-stage protection system is used for powering installations, consisting of type 1, 2, and 3 surge protectors according to the PN-EN 61643-11 standard.

The OPX-4P-B+C surge protector is a type 1+2 device (category B+C), ideal for protecting electrical installations in single-family homes and multi-family buildings.