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nm8s-mr55-250 chint extended rotary handle for nm8s-125/250 3p
Chint NM8S-MR55-250 IP55 extended rotary handle for compatible NM8S-125 and NM8S-250 3-pole moulded case circuit breakers.
Why Choose the Chint NM8S-MR55-250 IP55 Extended Rotary Handle?
The Chint NM8S-MR55-250 is a high-quality IP55 extended rotary handle designed for compatible Chint NM8S-125 and NM8S-250 3-pole moulded case circuit breakers (MCCBs). It enables safe and convenient operation of the breaker from the outside of an enclosure door, improving accessibility while maintaining enclosure protection and operator safety.
As part of the Chint NM8S MCCB accessory range, this extended rotary handle is engineered for industrial and commercial switchboards where the circuit breaker is mounted inside the enclosure. It provides clear ON/OFF indication, smooth manual operation and reliable performance in demanding electrical environments.
With an IP55 protection rating, the NM8S-MR55-250 helps maintain enclosure integrity while allowing external operation of compatible MCCBs. It is ideal for panel builders, electrical contractors and OEMs requiring dependable door-mounted breaker operation.
Key Advantages
- Extended rotary handle for enclosure door operation.
- Compatible with NM8S-125 and NM8S-250 3-pole MCCBs.
- IP55 protection helps maintain enclosure sealing.
- Clear ON/OFF position indication.
- Provides safe manual switching from outside the panel.
- Suitable for industrial, commercial and OEM panel applications.
Key Features
- Chint NM8S Series MCCB accessory.
- Extended IP55 rotary handle.
- Compatible with NM8S-125 and NM8S-250 3P breakers.
- External enclosure door operation.
- Smooth manual rotary switching.
- Visible ON/OFF position indication.
- Robust industrial construction.
- Designed for switchboards and control panels.
Safe External Operation of MCCBs
The Chint NM8S-MR55-250 allows compatible MCCBs to be operated without opening the electrical enclosure, improving operator safety and simplifying routine switching and maintenance. The IP55 construction helps maintain protection against dust and water ingress while providing reliable manual control.
Designed specifically for industrial switchboards and control panels, the extended rotary handle provides practical external operation while supporting safe isolation procedures during servicing and maintenance.
Typical Applications
- Industrial switchboards.
- Control panels.
- Commercial distribution boards.
- OEM machinery panels.
- Electrical isolation points.
- Power distribution systems.
Technical Specifications
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| Trip Unit | LSI | |
|---|---|---|
| Phase | Three Phase | |
| Device Type | Accessory | |
| Manufacturer | Chint | |
| Series | NM8S Accessories | |
| Model | NM8S-MR55-250 | |
| Product type | Extended rotary handle | |
| Accessory type | MCCB operating handle | |
| Compatible breaker range | Chint NM8S | |
| Compatible frame sizes | NM8S-125 / NM8S-250 | |
| Compatible pole configuration | 3 Pole | |
| Protection rating | IP55 | |
| Operation type | Manual rotary operation | |
| Mounting type | Door-mounted extended handle | |
| Application | External operation of compatible MCCBs |
Frequently Asked Questions
What is the Chint NM8S-MR55-250 used for?
It provides external rotary operation for compatible Chint NM8S moulded case circuit breakers installed inside electrical enclosures.
Which breakers is this rotary handle compatible with?
The NM8S-MR55-250 is designed for compatible NM8S-125 and NM8S-250 3-pole MCCBs.
What does the IP55 rating provide?
The IP55 enclosure rating helps protect against dust ingress and low-pressure water jets while allowing convenient external breaker operation.
Can the breaker be operated without opening the panel?
Yes. The extended rotary handle is specifically designed to allow safe manual operation from outside the enclosure door.
Where is this accessory typically installed?
It is commonly installed on industrial switchboards, control panels, commercial distribution boards and OEM equipment.
Trusted by Electrical Professionals Worldwide
Chint NM8S accessories are trusted by electrical engineers, panel builders and contractors for dependable MCCB operation, reliable installation and safe enclosure-mounted switching in demanding industrial and commercial environments.
