Chint NM8-IL-4P-250 genuine mechanical interlock for NM8-250 4-pole moulded case circuit breakers, designed to prevent simultaneous operation of two breakers in changeover applications.
£18.75
The Chint NM8-IL-4P-250 is a genuine mechanical interlock accessory designed specifically for Chint NM8-250 4-pole moulded case circuit breakers (MCCBs). It mechanically prevents two compatible breakers from being switched on at the same time, supporting safe operation in changeover and dual power supply systems.
As part of the Chint NM8 MCCB accessory range, the NM8-IL-4P-250 is ideal for installations where two power sources must remain isolated from one another. It is commonly used in mains and generator changeover panels, standby power systems and industrial distribution boards requiring reliable mechanical prevention of simultaneous breaker closing.
Manufactured for compatibility with NM8-250 4-pole MCCBs, this genuine Chint accessory provides dependable mechanical operation, straightforward installation and long-term reliability in low-voltage electrical distribution applications.
Mechanical interlocking is an important safety feature in changeover systems, helping ensure that two connected MCCBs cannot be closed at the same time. This prevents unintended connection between separate supplies and supports safe transfer between mains, generator or alternative power sources.
The Chint NM8-IL-4P-250 provides a practical and reliable solution for panel builders and electrical contractors working with NM8-250 4-pole MCCB assemblies in industrial and commercial power distribution systems.
| Phase | Three Phase |
|---|---|
| Manufacturer | Chint |
| Series | NM8 MCCB Accessories |
| Model | NM8-IL-4P-250 |
| Product type | Mechanical interlock |
| Accessory type | MCCB interlock assembly |
| Compatible breaker frame | NM8-250 |
| Compatible poles | 4-pole |
| Application | Mechanical interlocking of two MCCBs |
| Mounting | Direct-fit accessory |
| Installation | Electrical distribution panels and switchboards |
| Suitable for | Mains/generator and dual power changeover systems |
It is a mechanical interlock used to prevent two compatible Chint NM8-250 4-pole moulded case circuit breakers from being switched on at the same time.
The NM8-IL-4P-250 is designed specifically for Chint NM8-250 4-pole MCCBs.
A mechanical interlock helps prevent simultaneous breaker operation, improving safety in mains and generator or dual supply changeover systems.
Yes. The NM8-IL-4P-250 is a genuine Chint accessory designed for compatible breakers within the NM8 MCCB range.
It is commonly installed in changeover panels, switchboards, standby power systems and industrial distribution equipment.
Chint NM8 accessories are trusted by panel builders, OEM manufacturers and electrical contractors to deliver safe operation, reliable installation quality and dependable performance in low-voltage power distribution systems.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...