Why Choose the Mersen S1023125 MULTIVERT® Double Fuse Switch Disconnector?
The Mersen S1023125 is a high-capacity MULTIVERT® double vertical NH fuse switch disconnector designed for switching, isolation and circuit protection in demanding low-voltage power distribution systems. Rated at 1260 A, the unit combines two 630 A NH Size 3 fuse-switch assemblies within a compact busbar-mounted device.
Designed for direct installation onto 185 mm busbar systems, the S1023125 provides a space-efficient solution for transformer substations, industrial switchboards and cable distribution cabinets. Its 3 × 1-pole switching arrangement allows each phase to be operated individually, supporting flexible maintenance and phase-specific isolation procedures.
The unit accepts NH Size 3 fuse-links manufactured in accordance with IEC/EN 60269-2 and VDE 0636-2. Three M12 screw cable terminals per pole support multiple-conductor installations, while the modular MULTIVERT® construction enables fast assembly and a high degree of protection during installation and servicing.
Key Advantages
- High-capacity 1260 A double fuse switch disconnector.
- Combines two 630 A NH Size 3 fuse circuits in one assembly.
- Designed for direct installation onto 185 mm busbar systems.
- 3 × 1-pole switching supports individual phase operation.
- Three M12 cable terminals per pole accommodate multiple conductors.
- Provides on-load switching, isolation and fuse protection in one device.
Key Features
- Mersen MULTIVERT® 800 A / 1260 A series.
- Double vertical NH fuse switch disconnector.
- 1260 A rated current.
- 500 V AC rated operating voltage.
- Configured as 2 × 3-pole fuse assemblies.
- 3 × 1-pole switching arrangement.
- Compatible with NH Size 3 fuse-links.
- Direct mounting onto 185 mm busbars.
- Three M12 screw connections per pole.
- Suitable for top or bottom cable termination.
- 8 kV rated impulse withstand voltage.
- 1000 V rated insulation voltage.
High-Current Switching and Protection in One Assembly
The Mersen S1023125 combines two 630 A fuse-switch circuits to provide an overall rated current of 1260 A. When fitted with correctly selected NH Size 3 fuse-links, the device provides dependable overload and short-circuit protection while also functioning as an on-load switch and isolation point.
Its individual pole-switching arrangement is particularly useful where phase-by-phase operation is required. The direct 185 mm busbar mounting system reduces cabling and installation complexity, while the three M12 connections per pole provide flexibility for parallel or multiple outgoing conductors.
Typical Applications
- Transformer substations.
- Industrial low-voltage switchboards.
- High-current power distribution systems.
- Residential and industrial distribution units.
- Cable distribution cabinets.
- Manufacturing and process installations.
