Why Choose the Mersen M1023258 MULTIVERT Fuse-Switch Disconnector?
The Mersen M1023258 is a robust NH vertical fuse-switch disconnector designed to provide reliable switching, circuit isolation and fuse protection in demanding low-voltage electrical distribution systems. Part of the Mersen MULTIVERT® 630A series, it is engineered for industrial switchboards, transformer substations and power distribution cabinets requiring dependable three-phase protection.
This model incorporates three calibrated current transformers for accurate three-phase current measurement. Each transformer is rated at 600/5 A, 5 VA, Class 0.5, allowing electrical current to be monitored without installing separate external measuring transformers. Its modular construction supports efficient installation and maintenance within modern power distribution systems.
With a conventional free-air thermal current rating of 630 A, compatibility with NH size 3 fuse-links and installation onto a 185 mm busbar system, the M1023258 is suitable for high-current industrial feeders. The three-pole switching mechanism disconnects all phases together, while the V-terminal arrangement provides secure and practical cable termination.
Key Advantages
- Combines switching, isolation and fuse protection in one unit.
- 630 A thermal current rating for high-current distribution circuits.
- Integrated 600/5 A Class 0.5 current transformers for three-phase measurement.
- Designed for electrical systems operating at up to 690 V AC.
- Direct installation onto standard 185 mm busbar systems.
- Three-pole simultaneous switching supports effective circuit isolation.
- Compatible with standard NH size 3 fuse-links.
- V-terminal connections provide secure conductor termination.
Key Features
- Mersen MULTIVERT® 630A series.
- NH size 3 vertical fuse-switch disconnector.
- 630 A conventional free-air thermal current with fuse-links.
- Suitable for operating voltages up to 690 V AC.
- 1 × 3-pole switching arrangement.
- Three integrated 600/5 A, 5 VA, Class 0.5 calibrated current transformers.
- Current measurement across all three poles.
- Direct mounting onto a 185 mm busbar system.
- V-terminal cable connection.
- Touch-protected construction suitable for industrial distribution assemblies.
Reliable Protection with Three-Phase Current Measurement
The Mersen M1023258 combines the circuit protection capabilities of NH fuse-links with safe load switching and electrical isolation. When fitted with appropriately rated fuse-links, it helps protect conductors and downstream electrical equipment against overloads and high short-circuit currents.
Its three integrated calibrated current transformers provide current measurement across every phase. This allows the unit to support metering, monitoring and load-management systems while avoiding the additional space and installation work associated with separate external transformers.
Typical Applications
- Industrial low-voltage switchboards.
- Transformer substations and feeder pillars.
- Commercial and industrial distribution units.
- Cable distribution cabinets.
- High-current machinery power systems.
- Motor control centres.
- Electrical metering and load-monitoring systems.
- OEM switchboard and panel manufacturing.
