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nm8-il-4p-1250 chint mechanical interlock for nm8-1250 4p
Chint NM8-IL-4P-1250 genuine mechanical interlock for NM8-800 and NM8-1250 4-pole moulded case circuit breakers, preventing simultaneous operation of two breakers in changeover applications.
Why Choose the Chint NM8-IL-4P-1250 Mechanical Interlock?
The Chint NM8-IL-4P-1250 is a genuine mechanical interlock accessory designed specifically for Chint NM8-800 and NM8-1250 4-pole moulded case circuit breakers (MCCBs). It mechanically prevents two compatible circuit breakers from being switched on simultaneously, providing a safe and dependable solution for dual power supply and automatic changeover applications.
As part of the Chint NM8 MCCB accessory range, the NM8-IL-4P-1250 enhances operational safety by ensuring only one breaker can remain in the ON position at any time. This makes it ideal for mains and generator changeover systems, standby power installations and critical electrical infrastructure where separate power sources must never be connected together.
Manufactured as a genuine Chint accessory, the NM8-IL-4P-1250 is engineered for full compatibility with NM8-800 and NM8-1250 4-pole MCCBs, delivering dependable mechanical operation, straightforward installation and long-term reliability in demanding industrial and commercial power distribution systems.
Key Advantages
- Designed specifically for Chint NM8-800 and NM8-1250 4-pole MCCBs.
- Mechanical interlock prevents simultaneous closing of two breakers.
- Improves operational safety during power source changeover.
- Ideal for mains and generator transfer systems.
- Helps prevent accidental paralleling of independent power supplies.
- Genuine Chint accessory for guaranteed compatibility.
Key Features
- Manufacturer: Chint.
- Part of the NM8 MCCB accessory range.
- Mechanical interlock assembly.
- Compatible with NM8-800 and NM8-1250 4-pole MCCBs.
- Prevents simultaneous breaker operation.
- Suitable for dual power supply installations.
- Direct-fit installation.
- Heavy-duty industrial mechanical construction.
Safe Mechanical Interlocking for Power Changeover
Mechanical interlocks provide an essential safety function by preventing two connected moulded case circuit breakers from being closed simultaneously. This eliminates the risk of unintentionally connecting independent power sources together and helps maintain safe operation of electrical distribution systems.
The Chint NM8-IL-4P-1250 is ideal for industrial switchboards, standby generator installations, automatic transfer systems and critical infrastructure where reliable mechanical interlocking between two high-current MCCBs is required.
Typical Applications
- Mains and generator changeover systems.
- Standby power installations.
- Industrial electrical distribution systems.
- Commercial switchboards.
- Critical infrastructure power supplies.
- OEM control and power distribution panels.
Technical Specifications
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| Phase | Three Phase | |
|---|---|---|
| Device Type | Accessory | |
| Manufacturer | Chint | |
| Series | NM8 MCCB Accessories | |
| Model | NM8-IL-4P-1250 | |
| Product type | Mechanical interlock | |
| Accessory type | MCCB interlock assembly | |
| Compatible breaker frames | NM8-800 / NM8-1250 | |
| 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 |
Frequently Asked Questions
What is the Chint NM8-IL-4P-1250 used for?
It is a mechanical interlock that prevents two compatible Chint NM8-800 or NM8-1250 4-pole moulded case circuit breakers from being switched on simultaneously.
Which circuit breakers is it compatible with?
The NM8-IL-4P-1250 is designed specifically for Chint NM8-800 and NM8-1250 4-pole MCCBs.
Why is a mechanical interlock important?
A mechanical interlock prevents simultaneous breaker operation, improving safety during mains and generator or dual power source changeover.
Is this a genuine Chint accessory?
Yes. The NM8-IL-4P-1250 is a genuine Chint accessory manufactured specifically for the NM8 MCCB range.
Where is this accessory typically installed?
It is commonly installed in changeover panels, switchboards, standby power systems and industrial power distribution equipment.
Trusted by Electrical Professionals Worldwide
Chint NM8 accessories are trusted by panel builders, OEM manufacturers and electrical contractors to deliver safe operation, dependable performance and professional installation quality within industrial power distribution systems.
