Apator 63-811748-021 RBK 1 Pro-M Fuse Switch Disconnector 250A NH1 Screw

The Apator RBK 1 Pro-M (article 63-811748-021) is a three-pole horizontal HRC fuse switch-disconnector for NH1 (size 1) fuse links, rated 250 A at up to 690 V AC. It is operated manually by a front rotary lever and is designed for distribution of electricity and protection against short circuits and overloads in low-voltage distribution boards, cable and metering cabinets.

In Apator’s designation the "-M" suffix denotes the screw-terminal version: conductors fitted with lug terminals are connected via M10 × 25 screws (Cu/Al conductors up to 120 mm²). It is not a motor drive. The unit mounts on a mounting plate.

• Type: RBK 1 Pro-M horizontal fuse switch-disconnector
• Article number: 63-811748-021
• Operation: manual front rotary lever (not motorised)
• Fuse size: NH1 (size 1)
• Rated thermal current Ith: 250 A
• Rated voltage Un: up to 690 V AC
• Utilization category: AC-23B
• Terminals: M10 × 25 screw terminals for conductors with lug terminals, up to 120 mm² (Cu/Al)
• Rated short-circuit withstand/making current: 80 kA at 690 V, 100 kA at 400 V
• Rated insulation voltage Ui: 1000 V
• Rated impulse withstand voltage Uimp: 8 kV
• Mechanical durability: 1600 cycles; electrical durability: 200 cycles
• Degree of protection: IP20
• Mounting: on mounting plate
• Housing: glass-fibre reinforced polyamide, flammability class V0; silver-plated contacts
• Standards: EN 60947-1, EN 60947-3, IEC 60947-1, IEC 60947-3