Why Choose the Mersen G1056005 NH Fuse Switch Disconnector?
The Mersen G1056005 is a high-capacity NH vertical fuse switch disconnector engineered for safe switching, isolation and circuit protection in demanding low-voltage power distribution systems. Part of the innovative Mersen MULTIVERT® 630A 4P series, it provides simultaneous switching of three phase conductors and the neutral conductor in a compact in-line design.
The G1056005 features a four-pole 3P+N configuration that enables all-pole network disconnection. Its neutral pole is designed to close before and open after the phase conductors, supporting safe operation in TT, TN-S and TN-C-S electrical networks. The unit mounts directly onto a 185 mm busbar system and has a compact overall width of approximately 100 mm.
With a rated current of 630 A and a rated operating voltage of up to 690 V AC, the Mersen G1056005 is suitable for NH Size 3 fuse links. Its M12 bolted cable connections, robust construction and high short-circuit withstand capability make it ideal for industrial distribution boards, renewable energy systems and cable distribution cabinets.
Key Advantages
- High-performance four-pole NH fuse switch disconnector.
- 630 A rated current for demanding power distribution systems.
- 3P+N switching enables all-pole network isolation.
- Neutral pole closes earlier and opens later than the phase conductors.
- Compatible with NH Size 3 fuse links.
- Direct installation onto 185 mm busbar systems.
- Compact 100 mm overall width conserves switchboard space.
- Lockable and sealable in the normal operating position.
Key Features
- Mersen MULTIVERT® 630A 4P series.
- 630 A rated operating current.
- 690 V AC rated operating voltage.
- 50–60 Hz operating frequency.
- One four-pole switching mechanism.
- Three phase poles plus neutral.
- Designed for NH Size 3 fuse links.
- M12 bolted cable connections.
- 1,000 V rated insulation voltage.
- 8 kV rated impulse withstand voltage.
- Touch protection up to IP30 with the central cover fitted.
- Front-accessible voltage measurement points.
Reliable Four-Pole Protection for Power Distribution
The Mersen G1056005 combines switching, electrical isolation and fuse-based overcurrent protection within a single compact assembly. Its four-pole configuration disconnects the neutral conductor together with all three phases, helping meet the requirements of electrical networks where complete all-pole isolation is necessary.
When fitted with suitable NH Size 3 fuse links, the unit helps protect cables and equipment against overloads and short circuits. Its direct busbar mounting, compact width and front-accessible measurement points simplify the construction, operation and maintenance of modern low-voltage distribution boards.
Typical Applications
- Industrial low-voltage distribution boards.
- Cable distribution cabinets.
- Renewable energy installations.
- Commercial and industrial switchboards.
- TT, TN-S and TN-C-S network systems.
- Main incoming power distribution assemblies.
- Manufacturing and processing facilities.
- Infrastructure and utility installations.
