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nm8s-400s-3p-400a chint 400a 3p electronic adjustable thermal & magnetic mccb
Chint NM8S-400S-3P-400A 400A 3 pole electronic moulded case circuit breaker with adjustable electronic trip unit for industrial and commercial low voltage power distribution.
Why Choose the Chint NM8S-400S-3P-400A Electronic MCCB?
The Chint NM8S-400S-3P-400A is a reliable electronic moulded case circuit breaker (MCCB) designed to provide dependable overload and short-circuit protection for low voltage power distribution systems. Built for industrial and commercial applications, it offers accurate fault protection and adjustable settings for improved coordination within electrical installations.
As part of the Chint NM8S Series, this breaker uses an adjustable electronic trip unit, allowing protection settings to be tailored to suit the application. This makes it suitable for switchboards, distribution panels, feeder circuits and machinery supplies where reliable circuit protection and operational continuity are essential.
With a 400A rated current, 3-pole configuration and 50kA breaking capacity, the NM8S-400S-3P-400A is well suited to three-phase electrical systems in manufacturing facilities, commercial buildings, infrastructure projects and industrial control environments.
Key Advantages
- 400A rated current for industrial and commercial power distribution.
- 3-pole MCCB suitable for three-phase electrical installations.
- Adjustable electronic trip unit for flexible protection settings.
- 50kA breaking capacity for dependable short-circuit protection.
- Supports improved protection coordination across distribution systems.
- Suitable for switchboards, feeder circuits and machinery power supplies.
Key Features
- Chint NM8S Series electronic moulded case circuit breaker.
- 400A rated current.
- 3-pole construction.
- Adjustable electronic protection.
- 50kA rated breaking capacity.
- Suitable for low voltage AC distribution systems.
- Fixed mounting design for electrical panels and switchboards.
- Manufactured in accordance with IEC/EN 60947-2.
Reliable Protection for Three-Phase Distribution Systems
The Chint NM8S-400S-3P-400A helps protect electrical installations by automatically disconnecting circuits during overload and short-circuit fault conditions. Its electronic release allows engineers to adjust protection settings, supporting better selectivity and coordination across low voltage distribution networks.
Its compact MCCB format and high breaking capacity make it suitable for use in industrial panels, commercial distribution boards and feeder circuits where reliable protection and safe isolation are required.
Typical Applications
- Industrial switchboards and distribution panels.
- Commercial building electrical systems.
- Three-phase feeder circuit protection.
- Manufacturing and process facilities.
- Machinery supplies and control panels.
- Infrastructure and utilities installations.
Technical Specifications
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| Trip Unit | LSI | |
|---|---|---|
| Mounting Type | Fixed | |
| Application | Power distribution | |
| Current | 400 A | |
| Phase | Three Phase | |
| Poles | 3-pole | |
| Device Type | MCCB | |
| Breaking Capacity | 50 kA | |
| Manufacturer | Chint | |
| Series | NM8S Electronic MCCB | |
| Model | NM8S-400S-3P-400A | |
| Product type | Electronic moulded case circuit breaker | |
| Rated current | 400A | |
| Frame size | 400S | |
| Number of poles | 3 Pole | |
| Trip unit | Adjustable electronic release | |
| Rated operational voltage | Up to 690V AC | |
| Rated insulation voltage | 800V | |
| Rated impulse withstand voltage | 8kV | |
| Breaking capacity | 50kA | |
| Frequency | 50 / 60Hz | |
| Mounting type | Fixed installation | |
| Protection functions | Overload and short-circuit protection | |
| Standard | IEC/EN 60947-2 |
Frequently Asked Questions
What is the Chint NM8S-400S-3P-400A used for?
It is used to provide overload and short-circuit protection for three-phase low voltage industrial and commercial power distribution systems.
What is the rated current of this MCCB?
The NM8S-400S-3P-400A has a 400A rated current.
How many poles does this breaker have?
This model has a 3-pole configuration, making it suitable for three-phase electrical distribution systems.
What type of trip unit does this MCCB use?
It uses an adjustable electronic trip unit, allowing protection settings to be adapted for improved system coordination.
Where is this breaker typically installed?
It is commonly installed in industrial switchboards, commercial distribution panels, feeder circuits and machinery control systems.
Trusted by Electrical Professionals Worldwide
Chint NM8S electronic MCCBs are trusted by panel builders, electrical contractors and engineers for reliable circuit protection, adjustable electronic protection settings and dependable performance in demanding low voltage installations.
