Why Choose the Mersen M1023189 MULTIVERT Fuse-Switch Disconnector?
The Mersen M1023189 is a robust NH vertical fuse-switch disconnector designed to provide reliable switching, isolation and fuse protection in industrial low-voltage electrical distribution systems. Part of the proven Mersen MULTIVERT® 250A series, this unit combines dependable circuit protection with a compact, modular design suitable for demanding switchboard and power distribution applications.
Also identified by the manufacturer reference 1.170.900, the M1023189 is designed for direct installation onto 185 mm busbar systems. Its three-pole switching arrangement enables all three phases to be disconnected together, supporting safer maintenance and effective isolation of downstream electrical equipment.
With a rated current of 250 A and a rated operational voltage of up to 690 V AC, this MULTIVERT fuse-switch disconnector accepts NH size 1 fuse-links manufactured in accordance with IEC and EN standards. Two V-terminals provide secure conductor connections, making the device suitable for industrial distribution boards, machinery power systems and infrastructure installations.
Key Advantages
- Combines switching, isolation and fuse protection in one device.
- 250 A rated current for industrial power distribution applications.
- Suitable for operating voltages up to 690 V AC.
- Direct mounting onto standard 185 mm busbar systems.
- Three-pole simultaneous switching for effective circuit isolation.
- Compatible with widely available NH size 1 fuse-links.
- Two V-terminals provide secure and practical cable connections.
- Modular MULTIVERT design simplifies switchboard installation and expansion.
Key Features
- Mersen MULTIVERT® 250A series.
- NH size 1 vertical fuse-switch disconnector.
- 250 A conventional free-air thermal current with fuse-links.
- 690 V AC rated operational voltage.
- Three poles with 1 × 3-pole switching.
- Designed for 185 mm busbar systems.
- Two V-terminal connections.
- Utilisation category up to AC-23B at 400 and 500 V AC.
- Rated insulation voltage of 1,000 V.
- Rated impulse withstand voltage of 12 kV.
Reliable Electrical Protection and Isolation
Fuse-switch disconnectors combine the protective characteristics of NH fuse-links with the ability to manually switch and isolate an electrical circuit. When installed with correctly rated fuse-links, the Mersen M1023189 helps protect cables, equipment and distribution systems against overloads and high short-circuit currents.
The vertical MULTIVERT construction allows the device to be mounted directly onto a 185 mm busbar system, reducing the need for additional mounting components and extensive internal wiring. This configuration helps create compact, organised and serviceable low-voltage switchboards.
Typical Applications
- Industrial low-voltage distribution boards.
- Electrical switchgear and switchboard assemblies.
- Power distribution for manufacturing equipment.
- Commercial and industrial building infrastructure.
- Motor control and machinery distribution systems.
- Utility and renewable-energy installations.
- Busbar-mounted feeder protection.
- OEM electrical panel manufacturing.
