SURGE PROTECTIVE DEVICE COMBTEC BC TT 275/12.5kA+RC

SURGE PROTECTIVE DEVICE COMBTEC BC TT 275/12.5kA+RC — surge protective device (SPD) for three-phase electrical supply systems with neutral conductor.

Purpose and application: Designed to protect electrical equipment from direct lightning strikes and induced overvoltages. Applied at the input of distribution switchboards and in electrical supply systems of buildings and structures.

Main characteristics:

• Protection class: TI+TII/B+C (protection against direct lightning strikes and switching overvoltages)
• Nominal AC voltage: 275 VAC
• Current carrying capacity during lightning discharge: 12.5 kA
• Nominal discharge current impulse: 20 kA
• Maximum branching current: 50 kA
• Protection level: 1.5 kV
• Connection scheme: 3+1 (three phases + neutral)
• Number of protection stages: 4
• Signal contact: yes (for monitoring tripping and load switching)

Design parameters:

• Design: Modular construction of Combtec series
• Overall dimensions: 72×71×99 mm (W×L×H)
• Net weight: 0.6 kg
• Power consumption: 0.08 W

Manufacturer: Schrack (Austria) — leading manufacturer of low-voltage electrical equipment and protection systems.

Packaging: supplied in quantity of 1 pcs. or 3 pcs. per order.