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MERSEN FUSE Neutral pole for M1250switches 4P1250
Mersen 4P1250 neutral-pole accessory for compatible M1250 UL 98 non-fusible disconnect switches, enabling coordinated four-pole isolation of three phases and neutral.
£618.24
Why Choose the Mersen 4P1250 Neutral-Pole Switch Accessory?
The Mersen 4P1250 is a dedicated neutral-pole accessory designed for use with compatible Mersen M1250 UL 98 non-fusible disconnect switches. It enables a three-pole switch assembly to be configured for four-pole operation where the neutral conductor must be switched and isolated alongside the phase conductors.
Engineered as part of Mersen's modular disconnect-switch system, the 4P1250 operates mechanically with the main switch poles to provide coordinated isolation. This makes it suitable for high-current electrical distribution systems, industrial switchboards and machinery installations requiring simultaneous disconnection of three phases and neutral.
The accessory is specifically matched to the M1250 switch platform and is intended for professional installation within a complete disconnect-switch assembly. Its robust construction supports dependable operation in demanding industrial and commercial power-distribution environments.
Key Advantages
- Adds a dedicated switched neutral pole to a compatible Mersen M1250 disconnect switch.
- Enables coordinated four-pole isolation of three phases and neutral.
- Designed for the high-current M1250 switch platform.
- Modular construction simplifies switchboard configuration.
- Suitable for service-entrance and industrial power-distribution applications.
- Manufactured by Mersen for dependable mechanical and electrical compatibility.
Key Features
- Mersen 4P1250 neutral-pole accessory.
- Compatible with Mersen M1250 UL 98 non-fusible disconnect switches.
- Provides one additional switched neutral pole.
- Mechanically coordinated with the main disconnect-switch mechanism.
- Designed for four-pole isolation configurations.
- Heavy-duty construction for high-current switch assemblies.
- Suitable for industrial control panels and switchboards.
- Accessory component rather than a complete disconnect switch.
Coordinated Neutral Isolation for High-Current Systems
A neutral-pole accessory allows the neutral conductor to be disconnected at the same time as the three phase conductors. This arrangement may be required in generating systems, transfer applications, separately derived supplies and other installations where complete four-pole isolation is specified.
The Mersen 4P1250 is engineered for coordinated operation with the M1250 disconnect-switch mechanism. It should only be installed with the specified compatible switch and in accordance with the switch documentation, applicable electrical regulations and the requirements of the complete power-distribution system.
Typical Applications
- Three-phase and neutral power-distribution systems.
- Industrial switchboards and control panels.
- Service-entrance disconnect assemblies.
- Generator and transfer-switch installations.
- Large machinery isolation systems.
- Commercial and industrial electrical distribution equipment.
Technical Specifications
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| Device Type | Accessory | |
|---|---|---|
| Manufacturer | Mersen | |
| Model | 4P1250 | |
| Part number | 4P1250 | |
| Product type | Neutral-pole disconnect-switch accessory | |
| Accessory function | Additional switched neutral pole | |
| Number of additional poles | 1 | |
| Compatible switch | Mersen M1250 non-fusible disconnect switch | |
| Switch standard | UL 98 | |
| Associated IEC standard | IEC 60947-3 | |
| Switch configuration | Converts a compatible three-pole assembly to four-pole operation | |
| Application | Simultaneous phase and neutral isolation | |
| Installation type | Direct attachment to compatible switch assembly | |
| Product category | Disconnect-switch accessories |
Frequently Asked Questions
What is the Mersen 4P1250 used for?
The Mersen 4P1250 adds a switched neutral pole to a compatible M1250 three-pole disconnect switch, enabling coordinated four-pole isolation.
Which switch is compatible with the Mersen 4P1250?
The accessory is designed for use with the Mersen M1250 UL 98 non-fusible disconnect-switch platform.
Does the 4P1250 switch the neutral conductor?
Yes. It provides an additional pole specifically intended to disconnect the neutral conductor alongside the three phase poles.
Is the Mersen 4P1250 a complete disconnect switch?
No. The 4P1250 is an accessory and must be installed as part of a compatible Mersen M1250 disconnect-switch assembly.
Where is four-pole isolation commonly required?
Four-pole isolation may be specified in generator systems, transfer applications, separately derived supplies and other installations where the neutral must be disconnected with the phase conductors.
Trusted by Switchboard Builders and Electrical Engineers
Mersen disconnect-switch accessories are used by switchboard manufacturers, electrical engineers and industrial contractors to configure dependable power-isolation systems for demanding electrical installations.
